NEW YORK, Sept. 09, 2026 (GLOBE NEWSWIRE) -- Bronstein, Gewirtz & Grossman, LLC, a nationally recognized investor-rights law firm, announces that a class action lawsuit has been filed against Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) and certain of its officers.
This lawsuit seeks to recover damages against Defendants for alleged violations of the federal securities laws on behalf of all persons and entities that purchased or otherwise acquired Regeneron securities between August 1, 2025 and May 15, 2026, both dates inclusive (the “Class Period”). Such investors are encouraged to join this case by visiting the firm’s site: bgandg.com/REGN.
Regeneron Case Details
The Complaint alleges that, throughout the Class Period, Defendants made materially false and/or misleading statements and/or failed to disclose that:
(1) the preliminary statistical assumptions underlying Regeneron’s Phase III Fianlimab-Libtayo study were fundamentally flawed;
(2) the study’s active treatment arm was not demonstrating meaningful clinical differentiation from standard therapies;
(3) the study was unlikely to achieve statistical significance with respect to its primary endpoint, even absent overperformance by the control arm; and
(4) as a result, the Company’s statements regarding the study’s design, progress, and prospects were materially false and/or misleading at all relevant times.
What's Next for Regeneron Investors?
A class action lawsuit has already been filed. If you wish to review a copy of the Complaint, you can visit the firm’s site: bgandg.com/REGN. or you may contact Peretz Bronstein, Esq. or his Client Relations Manager, Nathan Miller, of Bronstein, Gewirtz & Grossman, LLC at 917-590-0911. If you suffered a loss in Regeneron you have until September 14, 2026, to request that the Court appoint you as lead plaintiff. Your ability to share in any recovery doesn't require that you serve as lead plaintiff.
No Cost to Regeneron Investors
We, Bronstein, Gewirtz & Grossman LLC, represent investors in class actions on a contingency fee basis. That means we will ask the court to reimburse us for out-of-pocket expenses and attorneys’ fees, usually a percentage of the total recovery, only if we are successful.
Why Bronstein, Gewirtz & Grossman, LLC for Regeneron Securities Class Action?
Bronstein, Gewirtz & Grossman, LLC is a nationally recognized firm that represents investors in securities fraud class actions and shareholder derivative suits. Our firm has recovered hundreds of millions of dollars for investors nationwide. More at www.bgandg.com
"Our practice centers on restoring investor capital and ensuring corporate accountability, which serves to uphold the essential integrity of the marketplace," said Peretz Bronstein, Founding Partner of Bronstein, Gewirtz & Grossman, LLC.
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Contact Info
Peretz Bronstein, Esq. or Nathan Miller
Bronstein, Gewirtz & Grossman, LLC
917-590-0911 | [email protected]
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Prior results do not guarantee similar outcomes.
Regeneron Pharmaceuticals, Inc. (REGN) Wells Fargo 21st Annual Healthcare Conference September 9, 2026 8:45 AM EDT
Company Participants
Ryan Crowe - Senior Vice President of Investor Relations & Strategic Analysis
Marion McCourt - Executive Vice President of Commercial
Conference Call Participants
Mohit Bansal - Wells Fargo Securities, LLC, Research Division
Presentation
Mohit Bansal
Wells Fargo Securities, LLC, Research Division
All right. Welcome, Welcome, Welcome. My name is Mohit Bansal. I'm one of the biotech and pharma analysts here at Wells Fargo. And I have the pleasure to start the day with the Regeneron management team, fifth year in a row. My 5 years at Wells Fargo. Regeneron has come here every year.
So with us, we have Marion McCourt, the Chief Commercial Officer of the company; and Ryan Crowe, Head of IR at the company. So I'll give the podium to Ryan to talk about some...
Ryan Crowe
Senior Vice President of Investor Relations & Strategic Analysis
Yes. I appreciate you having us, Mohit, 5 years. It's flown by a lot of successes that we've been able to report at this very conference and excited to be back. So thank you. Thank you. Before we begin, I just need to make a couple of forward-looking statement disclaimers. I would like to remind you that remarks made today may include forward-looking statements about Regeneron, and each forward-looking statement is subject to risks and uncertainties that could cause actual results and events to differ materially from those projected in such statements.
A description of material risks and uncertainties can be found in Regeneron's SEC filings. Regeneron does not undertake any obligation to update any forward-looking statements, whether as a result of new information, future events or otherwise.
With that, I'll just make a couple of opening comments, and then we'll get to your questions, Mohit. Going
Institutional investors with REGN positions may need to assess alleged clinical-trial disclosure failures that preceded a $102.09 per-share decline from the Class Period high. This notice focuses on fiduciary review, portfolio loss documentation, and lead plaintiff considerations.
, /PRNewswire/ -- Levi & Korsinsky, LLP notifies institutional investors in Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) that a class action has been filed on behalf of shareholders who purchased securities between August 1, 2025 and May 15, 2026. Find out if you might be eligible to recover losses. You may also contact Joseph E. Levi, Esq. at [email protected] or (212) 363-7500.
REGN declined from $731.77 on April 28, 2026 to $629.68 after the May 15, 2026 disclosure, a $102.09 per-share decline, or approximately 13.95%. The lead plaintiff deadline is September 14, 2026.
The complaint alleges Regeneron presented an overly optimistic picture of its Phase III Fianlimab-Libtayo Study disclosures while minimizing the risk that a prolonged slowdown in progression-free survival event accrual reflected deeper statistical problems. For pension funds, asset managers, endowments, and other fiduciaries, the issue is practical: whether portfolio losses during the Class Period warrant evaluation for potential recovery.
Fiduciary Obligations and Recovery Options
Institutional holders often evaluate securities claims through documentation, governance, and loss-size lenses. In this matter, the pleading asserts that alleged misstatements about clinical-trial risk affected the market price of REGN shares before the later disclosures.
Review purchases and sales of REGN common stock during August 1, 2025 through May 15, 2026. Identify shares retained through the April 29, 2026 protocol-amendment disclosure and the May 15, 2026 failed-endpoint announcement. Preserve investment committee materials, manager reports, and trade confirmations tied to REGN positions. Compare realized and unrealized losses against fiduciary thresholds for monitoring securities litigation recoveries. Consider whether a lead plaintiff role aligns with portfolio size, governance policies, and oversight objectives. Portfolio Impact Assessment for REGN Holders
As detailed in the action, Regeneron disclosed on April 29, 2026 that the Phase III study protocol had been altered to expand the patient population eligible for progression-free survival analysis. The Company later announced that the trial did not reach statistical significance on its primary endpoint, after which REGN shares declined further.
"Institutional investors play a critical role in securities class actions. In this Regeneron matter, fiduciaries may wish to evaluate whether alleged clinical-trial disclosure failures affected portfolio decisions, documented losses, and potential recovery options." -- Joseph E. Levi, Esq.
Click here to submit your information and learn more about the case or call (212) 363-7500.
INSTITUTIONAL INVESTOR REPRESENTATION — Levi & Korsinsky, LLP provides sophisticated counsel to institutional investors evaluating lead plaintiff opportunities. The firm has recovered hundreds of millions of dollars. Ranked among ISS Top 50 for seven consecutive years.
Frequently Asked Questions About the REGN Lawsuit
Q: What is the REGN class action lawsuit about? A: A securities class action has been filed against Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) alleging materially false and misleading statements between August 1, 2025 and May 15, 2026. Shares fell approximately 13.95% from the Class Period high after the Company disclosed a protocol amendment and later announced that the Phase III Fianlimab-Libtayo Study did not reach statistical significance for its primary endpoint. Investors who purchased shares during the Class Period and suffered losses may be eligible to seek compensation.
Q: Who is eligible to join the REGN investor lawsuit? A: Investors who purchased REGN stock or securities between August 1, 2025 and May 15, 2026 and suffered financial losses may be eligible. Eligibility is based on purchase date and documented losses, not on whether you still hold the shares.
Q: What specific misstatements does the REGN lawsuit allege? A: The complaint alleges Regeneron made materially false or misleading statements regarding the risk of clinical failure in the Phase III Fianlimab-Libtayo Study, including statements that allegedly framed slowing event accrual as potentially favorable when the trial allegedly faced increased statistical and clinical risk. When the protocol amendment and failed primary endpoint were disclosed, the stock price declined sharply.
Q: What court was the REGN class action filed in? A: The case was filed in the United States District Court for the Southern District of New York, governed by the Private Securities Litigation Reform Act of 1995.
Q: What is a lead plaintiff and why does it matter? A: A lead plaintiff is the investor appointed by the court to represent the entire class. Lead plaintiffs are typically investors with the largest documented losses. Being appointed does not increase individual recovery but gives direct oversight of how the case is run.
Q: What documents do I need for a loss review? A: Brokerage statements or trade confirmations showing purchase dates, share quantities, prices paid, and any subsequent sale dates and prices.
Q: What if I already sold my REGN shares, can I still recover losses? A: Yes. Eligibility is based on when you purchased, not whether you still hold the shares. Investors who bought during the Class Period and sold at a loss may still be eligible to participate.
Q: Do I need to go to court or give testimony? A: No. The overwhelming majority of class members never appear in court or give depositions. If there is a settlement or recovery, eligible class members generally submit a claim form to seek their portion.
CONTACT:\
Levi & Korsinsky, LLP\
Joseph E. Levi, Esq.\
Ed Korsinsky, Esq.\
33 Whitehall Street, 27th Floor\
New York, NY 10004\
[email protected]\
Tel: (212) 363-7500\
Fax: (212) 363-7171
Attorney Advertising. Prior results do not guarantee similar outcomes.
SAN DIEGO, Sept. 08, 2026 (GLOBE NEWSWIRE) -- The law firm of Robbins Geller Rudman & Dowd LLP announces that purchasers or acquirers of Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) common stock between August 1, 2025 and May 15, 2026, both dates inclusive (the “Class Period”), have until September 14, 2026 to seek appointment as lead plaintiff of the Regeneron class action lawsuit. Captioned Cheatham v. Regeneron Pharmaceuticals, Inc., No. 26-cv-06026 (S.D.N.Y.), the Regeneron class action lawsuit charges Regeneron as well as certain of Regeneron’s top executives with violations of the Securities Exchange Act of 1934.
If you suffered substantial losses and wish to serve as lead plaintiff of the Regeneron class action lawsuit, please provide your information here:
You can also contact attorneys Ken Dolitsky or Michael Albert of Robbins Geller by calling 800/851-7783 or via e-mail at [email protected].
CASE ALLEGATIONS: Regeneron is a pharmaceutical company that discovers, invents, develops, manufactures, tests, and commercializes medicines to treat various disorders worldwide.
The Regeneron class action lawsuit alleges that defendants throughout the Class Period made false and/or misleading statements and/or failed to disclose that: (i) defendants created the false impression that they possessed reliable information demonstrating that Regeneron’s Phase III Fianlimab-Libtayo Study was well-poised for success, while minimizing risks to the study’s odds of achieving its primary endpoint and its overall statistical validity arising from the prolonged event rate slowdown; (ii) Regeneron’s preliminary statistical assumptions were fundamentally flawed; (iii) the active treatment arm was failing to achieve meaningful clinical differentiation over standard therapies; and (iv) the trial would ultimately fail to reach statistical significance on its primary endpoint even without overperformance of the control arm.
On April 29, 2026, during Regeneron’s first quarter earnings call, defendants allegedly disclosed that the Phase III Fianlimab-Libtayo Study had been altered, expanding the number of patients in the study eligible for “analysis of progression-free survival.” On this news, the price of Regeneron stock declined more than 6%, according to the complaint.
Then, after-market on May 15, 2026, Regeneron issued a press release allegedly announcing that the “Phase 3 Trial of Fianlimab . . . did not reach statistical significance for the primary endpoint of improvement in progression-free survival (PFS).” On this news, the price of Regeneron stock dropped nearly 10%, according to the complaint.
THE LEAD PLAINTIFF PROCESS: The Private Securities Litigation Reform Act of 1995 permits any investor who purchased or acquired Regeneron common stock during the Class Period to seek appointment as lead plaintiff in the Regeneron class action lawsuit. A lead plaintiff is generally the movant with the greatest financial interest in the relief sought by the putative class who is also typical and adequate of the putative class. A lead plaintiff acts on behalf of all other class members in directing the Regeneron class action lawsuit. The lead plaintiff can select a law firm of its choice to litigate the Regeneron class action lawsuit. An investor’s ability to share in any potential future recovery is not dependent upon serving as lead plaintiff of the Regeneron class action lawsuit.
ABOUT ROBBINS GELLER: Robbins Geller Rudman & Dowd LLP is one of the world’s leading law firms representing investors in securities fraud and shareholder rights litigation. Our Firm ranked #1 on the most recent ISS Securities Class Action Services Top 50 Report, recovering more than $916 million for investors in 2025. This marks our fourth #1 ranking in the past five years. And in those five years alone, Robbins Geller recovered $8.4 billion for investors – $3.4 billion more than any other law firm. With 200 lawyers in 10 offices, Robbins Geller is one of the largest plaintiffs’ firms in the world, and the Firm’s attorneys have obtained many of the largest securities class action recoveries in history, including the largest ever – $7.2 billion – in In re Enron Corp. Sec. Litig. Please visit the following page for more information:
NEW YORK, Sept. 08, 2026 (GLOBE NEWSWIRE) -- Bernstein Liebhard LLP, a nationally acclaimed investor rights law firm, reminds Regeneron Pharmaceuticals, Inc. (“Regeneron” or the “Company”) (NASDAQ: REGN) of the September 14, 2026 deadline involving a securities fraud class action lawsuit commenced against the Company.
Should You Join The Regeneron Class Action Lawsuit:
Do you, or did you, own shares of Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN)?Did you purchase your shares between August 1, 2025 and May 15, 2026, inclusive?Did you lose money in your investment in Regeneron Pharmaceuticals, Inc.? What To Do Next:
Investors are encouraged to act promptly and submit a form at Regeneron Pharmaceuticals, Inc. Shareholder Class Action Lawsuit or contact Investor Relations Manager Peter Allocco at (212) 951-2030 or [email protected].
If you wish to serve as lead plaintiff for the Class, you must file papers by September 14, 2026. A lead plaintiff is a representative party acting on other class members’ behalf in directing the litigation. Your ability to share in any recovery doesn’t require that you serve as lead plaintiff. If you choose to take no action, you may remain an absent class member.
All representation is on a contingency fee basis. Shareholders pay no fees or expenses.
About The Lawsuit:
A lawsuit was filed on behalf of investors (the “Class”) who purchased or acquired the common stock of Regeneron between August 1, 2025 and May 15, 2026, inclusive, alleging violations of the Securities Exchange Act of 1934 against the Company and certain of its senior officers.
The lawsuit alleges that defendants made materially false and misleading statements and omissions regarding the Company’s business operations, growth prospects, and financial stability. As a result of these alleged misrepresentations, Regeneron common stock traded at artificially inflated prices during the Class Period. When the truth was disclosed, investors allegedly suffered significant losses.
About Bernstein Liebhard:
Since 1993, Bernstein Liebhard LLP has recovered over $3.5 billion for its clients. In addition to representing individual investors, the Firm has been retained by some of the largest public and private pension funds in the country to monitor their assets and pursue litigation on their behalf. As a result of its success litigating hundreds of class actions, the Firm has been named to The National Law Journal’s “Plaintiffs’ Hot List” thirteen times and listed in The Legal 500 for sixteen consecutive years.
NEW YORK, Sept. 08, 2026 (GLOBE NEWSWIRE) -- SueWallSt notifies investors in Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) that a class action has been filed on behalf of shareholders who purchased securities between August 1, 2025 and May 15, 2026. Find out if you could qualify to recover your per-share losses. You may also contact Joseph E. Levi, Esq. at [email protected] or (888) SueWallSt.
REGN declined from a Class Period high of $731.77 on April 28, 2026 to $629.68 after the May 15, 2026 after-market announcement, a $102.09 per-share decline, or approximately 13.95%. The lead plaintiff deadline is September 14, 2026.
Ryan Crowe Regeneron Securities Defendant Liability Allegations
As named in the action, Ryan Crowe served as Regeneron's Senior Vice President of Investor Relations and Strategic Analysis during the Class Period. The complaint identifies investor-facing presentations in which Crowe allegedly discussed the Phase III Fianlimab-Libtayo Study, prior Phase I results, expectations for progression-free survival, and the significance of slowing event accrual.
The action claims those communications contributed to an allegedly misleading impression that the study remained positioned to demonstrate meaningful clinical differentiation over existing standards of care. Plaintiffs allege that investors were not adequately informed that the prolonged event-rate slowdown reflected heightened risk to the trial's statistical validity and primary endpoint.
Crowe's Alleged Role in Investor Communications
Crowe is named as an individual defendant in the securities action.The complaint identifies his role in discussing Regeneron's oncology pipeline with investors and analysts.His alleged statements referenced Phase I pooled results, including a 57% objective response rate and 24-month median progression-free survival.Plaintiffs claim the public messaging understated the risk that the Phase III study would fail to show statistically significant PFS improvement.The complaint alleges the later protocol expansion and failed primary endpoint corrected prior alleged misstatements. Accountability Questions Raised by the Filing
The securities action asserts claims under Sections 10(b) and 20(a) of the Exchange Act and Rule 10b-5. As pleaded, Crowe's investor-relations function is relevant because the challenged statements were allegedly directed to the market during a period when REGN shares traded at prices plaintiffs claim were artificially inflated.
"Individual officers who communicate with investors about clinical-trial progress should ensure those statements are accurate, complete, and appropriately qualified. Here, the action alleges that public commentary about PFS event accrual and clinical differentiation did not match the risks facing the Phase III study." -- Joseph E. Levi, Esq.
Submit your information here or call (888) SueWallSt.
WHY SUEWALLST: SueWallSt is powered by Levi & Korsinsky LLP. Levi & Korsinsky LLP has established itself as a nationally-recognized securities litigation firm that has secured hundreds of millions of dollars for aggrieved shareholders and built a track record of winning high-stakes cases. The firm has extensive expertise representing investors in complex securities litigation and a team of over 70 employees to serve our clients. For seven years in a row, Levi & Korsinsky has ranked in ISS Securities Class Action Services' Top 50 Report as one of the top securities litigation firms in the United States.
Frequently Asked Questions About the REGN Lawsuit
Q: What is the REGN class action lawsuit about? A: A securities class action has been filed against Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) alleging materially false and misleading statements between August 1, 2025 and May 15, 2026. Shares fell approximately 13.95% from the Class Period high after the Company disclosed a protocol amendment and later announced that the Phase III Fianlimab-Libtayo Study did not reach statistical significance for its primary PFS endpoint.
Q: Who may be eligible in the REGN investor lawsuit? A: Investors who purchased REGN stock or securities between August 1, 2025 and May 15, 2026 and suffered financial losses may be eligible. Eligibility is based on purchase date and documented losses, not on whether you still hold the shares.
Q: What court was the REGN class action filed in? A: The case was filed in the United States District Court for the Southern District of New York and is governed by the Private Securities Litigation Reform Act of 1995.
Q: What is a lead plaintiff and why does it matter? A: A lead plaintiff is the investor appointed by the court to represent the entire class. Lead plaintiffs are typically investors with the largest documented losses. Being appointed does not increase individual recovery but gives direct oversight of how the case is run.
Q: What documents are useful for evaluating REGN losses? A: Brokerage statements or trade confirmations showing purchase dates, share quantities, prices paid, and any subsequent sale dates and prices are typically useful for evaluating potential losses.
Q: What if I already sold my REGN shares, can I still recover losses? A: Yes. Eligibility is based on when you purchased, not whether you still hold the shares. Investors who bought during the Class Period and sold at a loss may still be eligible to participate.
Q: Do I need to go to court or give testimony? A: No. The overwhelming majority of class members never appear in court or give depositions. If there is a settlement or recovery, eligible class members generally submit a claim form to seek their portion.
Q: What does it cost me to participate? A: There is no upfront cost to contact the firm. Securities class actions are generally handled on a pure contingency basis. No upfront fees, no retainer, and no out-of-pocket costs. Any attorneys' fees and expenses awarded to class counsel are subject to court approval.
Faruqi & Faruqi, LLP Securities Litigation Partner James (Josh) Wilson Encourages Investors Who Suffered Losses In Regeneron To Contact Him Directly To Discuss Their Options
If you purchased or acquired securities in Regeneron between August 1, 2025 and May 15, 2026 and would like to discuss your legal rights, call Faruqi & Faruqi partner Josh Wilson directly at 877-247-4292 or 212-983-9330 (Ext. 1310).
[You may also click here for additional information]
New York, New York--(Newsfile Corp. - September 8, 2026) - Faruqi & Faruqi, LLP, a leading national securities law firm, is investigating potential claims against Regeneron Pharmaceuticals, Inc. ("Regeneron" or the "Company") (NASDAQ: REGN) and reminds investors of the September 14, 2026 deadline to seek the role of lead plaintiff in a federal securities class action that has been filed against the Company.
Faruqi & Faruqi is a leading national securities law firm with offices in New York, Pennsylvania, California and Georgia. The firm has recovered hundreds of millions of dollars for investors since its founding in 1995. See www.faruqilaw.com.
As detailed below, the complaint alleges that the Company and its executives violated federal securities laws by making false and/or misleading statements and/or failing to disclose the true state of Regeneron's Phase III Fianlimab-Libtayo Study; notably, that its preliminary statistical assumptions were fundamentally flawed, that the active treatment arm was failing to achieve meaningful clinical differentiation over standard therapies, and that the trial would ultimately fail to reach statistical significance on its primary endpoint even without overperformance of the control arm.
On April 29, 2026, Defendants disclosed that the Phase III Fianlimab-Libtayo Study had been altered, expanding the number of patients in the study eligible for "analysis of progression-free survival." On this news, Regeneron's stock price fell $45.41, or approximately 6.2%, to close at $686.36 per share on April 29, 2026.
On May 15, 2026, Regeneron issued a press release announcing that the "Phase 3 Trial of Fianlimab . . . did not reach statistical significance for the primary endpoint of improvement in progression-free survival (PFS)." On this news, Regeneron's stock price fell $68.57, or approximately 9.8%, to close at $629.68 per share on May 18, 2026.
The court-appointed lead plaintiff is the investor with the largest financial interest in the relief sought by the class who is adequate and typical of class members who directs and oversees the litigation on behalf of the putative class. Any member of the putative class may move the Court to serve as lead plaintiff through counsel of their choice, or may choose to do nothing and remain an absent class member. Your ability to share in any recovery is not affected by the decision to serve as a lead plaintiff or not.
Faruqi & Faruqi, LLP also encourages anyone with information regarding Regeneron's conduct to contact the firm, including whistleblowers, former employees, shareholders and others.
To learn more about the Regeneron class action, go to www.faruqilaw.com/REGN or call Faruqi & Faruqi partner Josh Wilson directly at 877-247-4292 or 212-983-9330 (Ext. 1310).
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Frequently Asked Questions (FAQ) for Investors Regarding the Regeneron Securities Class Action Lawsuit:
What is the Regeneron securities fraud lawsuit about?
Faruqi & Faruqi, LLP has filed a securities class action lawsuit against Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) on behalf of investors who purchased Regeneron securities during the Class Period. The lawsuit alleges that Regeneron and certain of its officers made materially false and misleading statements regarding the Phase III Fianlimab-Libtayo clinical study. Specifically, the complaint alleges that defendants concealed that the study's preliminary statistical assumptions were fundamentally flawed, that the active treatment arm was allegedly failing to achieve meaningful clinical differentiation over standard therapies, and that the trial would ultimately fail to reach statistical significance on its primary endpoint. The alleged fraud is said to have come to light through two disclosures: first, on April 29, 2026, when defendants announced an expansion of patients eligible for analysis of progression-free survival — causing Regeneron's stock to fall approximately 6.2% — and then on May 15, 2026, when Regeneron announced that the Phase III trial did not reach statistical significance for its primary endpoint, causing the stock to fall an additional approximately 9.8%.
Who may be eligible to participate in the lawsuit?
Investors who purchased or otherwise acquired Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) securities on the NASDAQ between August 1, 2025 and May 15, 2026, inclusive (the "Class Period"), may be eligible to participate in this lawsuit. Eligibility to participate is not limited to those who seek appointment as lead plaintiff; any investor who purchased Regeneron securities during the Class Period and suffered a loss may potentially share in any recovery obtained on behalf of the class. Investors are encouraged to review their trading records to determine whether their purchases fall within the Class Period. Participation in the litigation does not require investors to take any active litigation role beyond filing a timely claim if a recovery is ultimately achieved.
What is a lead plaintiff, and how can I seek appointment?
A lead plaintiff is a court-appointed representative who acts on behalf of all class members in directing the litigation, including working with counsel to make key strategic decisions regarding the case. Any investor who purchased Regeneron securities during the Class Period and suffered losses may move the court for appointment as lead plaintiff, but must do so no later than September 14, 2026, which is the court-established deadline for such motions. Courts generally appoint the movant with the largest financial interest in the relief sought who also satisfies the adequacy requirements of the applicable securities laws. Importantly, investors are not required to seek appointment as lead plaintiff in order to participate in or potentially share in any recovery that may result from this litigation. Those who do not seek lead plaintiff status may still submit a claim and may be eligible to receive a portion of any settlement or judgment obtained on behalf of the class.
What should investors do if they purchased Regeneron stock during the Class Period?
Investors who purchased Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) securities between August 1, 2025 and May 15, 2026 are encouraged to promptly review their brokerage and trading records to confirm the timing and size of their purchases and any resulting losses. Investors should take steps to preserve all relevant documentation, including trade confirmations, account statements, and any communications relating to their Regeneron holdings, as such records may be material to any future claim. Given that the lead plaintiff motion deadline is September 14, 2026, investors who wish to be considered for that role should act in advance of that date. Investors may wish to consult with Faruqi & Faruqi, LLP to better understand their legal rights and options before the deadline passes. Retaining counsel or seeking lead plaintiff status is not required to participate in any potential class recovery, but timely action is advisable to preserve all available options.
Why should investors contact Faruqi & Faruqi, LLP?
Faruqi & Faruqi, LLP has represented investors in securities litigation for decades and has recovered hundreds of millions of dollars for shareholders. Investors who purchased Regeneron securities during the Class Period may contact the firm to discuss their legal rights, potential claims, and the lead plaintiff process at no cost or obligation.
Attorney Advertising. The law firm responsible for this advertisement is Faruqi & Faruqi, LLP (www.faruqilaw.com). Prior results do not guarantee or predict a similar outcome with respect to any future matter. We welcome the opportunity to discuss your particular case. All communications will be treated in a confidential manner.
To view the source version of this press release, please visit https://www.newsfilecorp.com/release/313369
Source: Faruqi & Faruqi LLP
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NEW YORK, Sept. 08, 2026 (GLOBE NEWSWIRE) -- Pomerantz LLP announces that a class action lawsuit has been filed against Regeneron Pharmaceuticals, Inc. (“Regeneron” or the “Company”) (NASDAQ: REGN). Such investors are advised to contact Danielle Peyton at [email protected] or 646-581-9980, (or 888.4-POMLAW), toll-free, Ext. 7980. Those who inquire by e-mail are encouraged to include their mailing address, telephone number, and the number of shares purchased.
The class action concerns whether Regeneron and certain of its officers and/or directors have engaged in securities fraud or other unlawful business practices.
You have until September 14, 2026, to ask the Court to appoint you as Lead Plaintiff for the class if you purchased or otherwise acquired Regeneron securities during the Class Period. A copy of the Complaint can be obtained at www.pomerantzlaw.com.
[Click here for information about joining the class action]
On April 29, 2026, during during Regeneron’s first quarter earnings call, the Company disclosed that the Phase III Fianlimab-Libtayo Study had been altered, expanding the number of patients in the study eligible for “analysis of progression-free survival.”
On this news, Regeneron’s stock price fell $45.41 per share, or 6.21%, to close at $686.36 per share on April 29, 2026.
Then, on May 15, 2026, Regeneron issued a press release disclosing that the “Phase 3 Trial of Fianlimab . . . did not reach statistical significance for the primary endpoint of improvement in progression-free survival (PFS).”
On this news, Regeneron’s stock price fell $68.57 per share, or 9.82%, to close at $629.68 per share on May 16, 2026.
Pomerantz LLP, with offices in New York, Chicago, Los Angeles, London, Paris, and Tel Aviv, is acknowledged as one of the premier firms in the areas of corporate, securities, and antitrust class litigation. Founded by the late Abraham L. Pomerantz, known as the dean of the class action bar, Pomerantz pioneered the field of securities class actions. Today, more than 85 years later, Pomerantz continues in the tradition he established, fighting for the rights of the victims of securities fraud, breaches of fiduciary duty, and corporate misconduct. The Firm has recovered numerous multimillion-dollar damages awards on behalf of class members. See www.pomlaw.com.
Attorney advertising. Prior results do not guarantee similar outcomes.
SAN FRANCISCO, Sept. 08, 2026 (GLOBE NEWSWIRE) -- Hagens Berman Sobol Shapiro LLP alerts investors in Regeneron Pharmaceuticals (NASDAQ: REGN) that a securities class action lawsuit has been filed after its surprising revelations concerning a Phase 3 clinical trial of a therapy intended to treat patients with melanoma.
The news that the trial failed drove the price of Regeneron shares sharply lower and, along with the severe market reaction ($11 billion market cap wipeout), triggered the lawsuit which seeks to represent investors who purchased or otherwise acquired shares of Regeneron common stock between August 1, 2025 and May 15, 2026.
National shareholder rights firm Hagens Berman is investigating the legal claims and urges Regeneron investors with substantial losses to submit your losses now. The firm also invites persons who may be able to assist in the investigation to contact its attorneys.
View our latest video summary of the allegations: youtu.be/rsW1-f8ARRs
Class Period: Aug. 1, 2025 – May 15, 2026
Lead Plaintiff Deadline: Sept. 14, 2026
Visit: www.hbsslaw.com/regn
Contact the Firm Now: [email protected]
844-916-0895
Regeneron Pharmaceuticals, Inc. (REGN) Securities Class Action:
The litigation is focused on the propriety of Regeneron’s repeated optimism about the state of- (and changes to-) its Phase 3 trial of Fianlimab in combination with Libtayo as a first-line treatment for metastatic or locally advanced melanoma (the “Study”).
The Study’s primary endpoint was progression-free survival (“PFS”) and Regeneron has characterized the combination as a “potential blockbuster.” “Events” – disease progression or death – determined the timing and statistical power of the primary PFS analysis.
The complaint alleges that Regeneron made false and misleading statements while failing to disclose critical information to investors. In particular, the lawsuit accuses the company and its management of not informing investors that the Study’s preliminary statistical assumptions were flawed, the active treatment arm was not achieving meaningful differentiation over standard therapies, and achievement of its primary endpoint was unlikely.
Throughout the Class Period, Regeneron and the other defendants assured investors of their confidence in the Trial’s achieving its primary endpoint even when events were slowing down. At one point, management said the slowing event rates are “because the test arms are performing well.”
The truth began to emerge on April 29, 2026, when Regeneron first revealed that it decided to alter the Trial protocol such that “t]he primary analysis of progression-free survival will now consider all patients enrolled in the study with a minimum follow-up of 6 months.”
One prominent analyst reportedly questioned whether the decision was made because, in contrast to management’s expressed confidence, the “underlying PFS benefit may be insufficient to show statistical significance.”
Then, on May 12, 2026, Regeneron admitted that the decision to alter the Trial protocol was made in response to “slow event rates,” occurred nearly six months ago, and was “submitted it to all the global regulatory authorities in November, December timeframe.”
Three days later, the final blow came. On May 15, 2026, Regeneron abruptly reported the “trial did not reach statistical significance of the primary endpoint of improvement in progression-free survival (PFS).”
“We’re focused on whether Regeneron altered the Trial protocol without timely telling investors to intentionally mislead them because the defendants knew so-called blockbuster potential for the combination wasn’t really there,” said Reed Kathrein, the Hagens Berman partner leading the firm’s investigation of the pending claims in the suit.
If you invested in Regeneron and have substantial losses, or have knowledge that will assist the firm’s investigation, submit your losses now »
If you’d like more information and answers to other frequently asked questions about the Regeneron case and the firm’s investigation, read more »
Whistleblowers: Persons with non-public information regarding Regeneron should consider their options to help in the investigation or take advantage of the SEC Whistleblower program. Under the new program, whistleblowers who provide original information may receive rewards totaling up to 30 percent of any successful recovery made by the SEC. For more information, call Reed Kathrein at 844-916-0895 or email [email protected].
About Hagens Berman
Hagens Berman is a global plaintiffs’ rights complex litigation firm focusing on corporate accountability. The firm is home to a robust practice and represents investors as well as whistleblowers, workers, consumers and others in cases achieving real results for those harmed by corporate negligence and other wrongdoings. Hagens Berman’s team has secured more than $2.9 billion in this area of law. More about the firm and its successes can be found at hbsslaw.com. Follow the firm for updates and news at @ClassActionLaw.
Attorney Advertising. Prior results do not guarantee a similar outcome in any future case.
Contact: Hagens Berman, Reed Kathrein, 715 Hearst Avenue, Suite 300, Berkeley, CA 94710, 844-916-0895, [email protected]
A video accompanying this announcement is available at https://www.globenewswire.com/NewsRoom/AttachmentNg/4d42c461-d988-4a68-b62e-94e8ce45b906
Regeneron (REGN) Securities Class Action Filed - Sept 14, 2026 Lead Plaintiff Deadline - Act Now Regeneron (REGN) Securities Class Action Filed - Sept 14, 2026 Lead Plaintiff Deadline - Act Now
San Diego, California--(Newsfile Corp. - September 7, 2026) - Robbins Geller Rudman & Dowd LLP announces that purchasers or acquirers of Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) common stock between August 1, 2025 and May 15, 2026, both dates inclusive (the "Class Period"), have until September 14, 2026 to seek appointment as lead plaintiff of the Regeneron class action lawsuit. Captioned Cheatham v. Regeneron Pharmaceuticals, Inc., No. 26-cv-06026 (S.D.N.Y.), the Regeneron class action lawsuit charges Regeneron as well as certain of Regeneron's top executives with violations of the Securities Exchange Act of 1934.
If you suffered substantial losses and wish to serve as lead plaintiff of the Regeneron class action lawsuit, please provide your information here:
You can also contact attorneys Ken Dolitsky or Michael Albert of Robbins Geller by calling 800/851-7783 or via e-mail at [email protected].
CASE ALLEGATIONS: Regeneron is a pharmaceutical company that discovers, invents, develops, manufactures, tests, and commercializes medicines to treat various disorders worldwide.
The Regeneron class action lawsuit alleges that defendants throughout the Class Period made false and/or misleading statements and/or failed to disclose that: (i) defendants created the false impression that they possessed reliable information demonstrating that Regeneron's Phase III Fianlimab-Libtayo Study was well-poised for success, while minimizing risks to the study's odds of achieving its primary endpoint and its overall statistical validity arising from the prolonged event rate slowdown; (ii) Regeneron's preliminary statistical assumptions were fundamentally flawed; (iii) the active treatment arm was failing to achieve meaningful clinical differentiation over standard therapies; and (iv) the trial would ultimately fail to reach statistical significance on its primary endpoint even without overperformance of the control arm.
On April 29, 2026, during Regeneron's first quarter earnings call, defendants allegedly disclosed that the Phase III Fianlimab-Libtayo Study had been altered, expanding the number of patients in the study eligible for "analysis of progression-free survival." On this news, the price of Regeneron stock declined more than 6%, according to the complaint.
Then, after-market on May 15, 2026, Regeneron issued a press release allegedly announcing that the "Phase 3 Trial of Fianlimab . . . did not reach statistical significance for the primary endpoint of improvement in progression-free survival (PFS)." On this news, the price of Regeneron stock dropped nearly 10%, according to the complaint.
THE LEAD PLAINTIFF PROCESS: The Private Securities Litigation Reform Act of 1995 permits any investor who purchased or acquired Regeneron common stock during the Class Period to seek appointment as lead plaintiff in the Regeneron class action lawsuit. A lead plaintiff is generally the movant with the greatest financial interest in the relief sought by the putative class who is also typical and adequate of the putative class. A lead plaintiff acts on behalf of all other class members in directing the Regeneron class action lawsuit. The lead plaintiff can select a law firm of its choice to litigate the Regeneron class action lawsuit. An investor's ability to share in any potential future recovery is not dependent upon serving as lead plaintiff of the Regeneron class action lawsuit.
ABOUT ROBBINS GELLER: Robbins Geller Rudman & Dowd LLP is one of the world's leading law firms representing investors in securities fraud and shareholder rights litigation. Our Firm ranked #1 on the most recent ISS Securities Class Action Services Top 50 Report, recovering more than $916 million for investors in 2025. This marks our fourth #1 ranking in the past five years. And in those five years alone, Robbins Geller recovered $8.4 billion for investors – $3.4 billion more than any other law firm. With 200 lawyers in 10 offices, Robbins Geller is one of the largest plaintiffs' firms in the world, and the Firm's attorneys have obtained many of the largest securities class action recoveries in history, including the largest ever – $7.2 billion – in In re Enron Corp. Sec. Litig. Please visit the following page for more information:
, /PRNewswire/ -- Hagens Berman Sobol Shapiro LLP alerts investors in Regeneron Pharmaceuticals (NASDAQ: REGN) that a securities class action lawsuit has been filed after its surprising revelations concerning a Phase 3 clinical trial of a therapy intended to treat patients with melanoma.
The news that the trial failed drove the price of Regeneron shares sharply lower and, along with the severe market reaction ($11 billion market cap wipeout), triggered the lawsuit which seeks to represent investors who purchased or otherwise acquired shares of Regeneron common stock between August 1, 2025 and May 15, 2026.
National shareholder rights firm Hagens Berman is investigating the legal claims and urges Regeneron investors with substantial losses to submit your losses now. The firm also invites persons who may be able to assist in the investigation to contact its attorneys.
View our latest video summary of the allegations: youtu.be/rsW1-f8ARRs
Class Period: Aug. 1, 2025 – May 15, 2026
Lead Plaintiff Deadline: Sept. 14, 2026
Visit: www.hbsslaw.com/regn
Contact the Firm Now: [email protected]
844-916-0895
Regeneron Pharmaceuticals, Inc. (REGN) Securities Class Action:
The litigation is focused on the propriety of Regeneron's repeated optimism about the state of- (and changes to-) its Phase 3 trial of Fianlimab in combination with Libtayo as a first-line treatment for metastatic or locally advanced melanoma (the "Study").
The Study's primary endpoint was progression-free survival ("PFS") and Regeneron has characterized the combination as a "potential blockbuster." "Events" – disease progression or death – determined the timing and statistical power of the primary PFS analysis.
The complaint alleges that Regeneron made false and misleading statements while failing to disclose critical information to investors. In particular, the lawsuit accuses the company and its management of not informing investors that the Study's preliminary statistical assumptions were flawed, the active treatment arm was not achieving meaningful differentiation over standard therapies, and achievement of its primary endpoint was unlikely.
Throughout the Class Period, Regeneron and the other defendants assured investors of their confidence in the Trial's achieving its primary endpoint even when events were slowing down. At one point, management said the slowing event rates are "because the test arms are performing well."
The truth began to emerge on April 29, 2026, when Regeneron first revealed that it decided to alter the Trial protocol such that "t]he primary analysis of progression-free survival will now consider all patients enrolled in the study with a minimum follow-up of 6 months."
One prominent analyst reportedly questioned whether the decision was made because, in contrast to management's expressed confidence, the "underlying PFS benefit may be insufficient to show statistical significance."
Then, on May 12, 2026, Regeneron admitted that the decision to alter the Trial protocol was made in response to "slow event rates," occurred nearly six months ago, and was "submitted it to all the global regulatory authorities in November, December timeframe."
Three days later, the final blow came. On May 15, 2026, Regeneron abruptly reported the "trial did not reach statistical significance of the primary endpoint of improvement in progression-free survival (PFS)."
"We're focused on whether Regeneron altered the Trial protocol without timely telling investors to intentionally mislead them because the defendants knew so-called blockbuster potential for the combination wasn't really there," said Reed Kathrein, the Hagens Berman partner leading the firm's investigation of the pending claims in the suit.
If you invested in Regeneron and have substantial losses, or have knowledge that will assist the firm's investigation, submit your losses now »
If you'd like more information and answers to other frequently asked questions about the Regeneron case and the firm's investigation, read more »
Whistleblowers: Persons with non-public information regarding Regeneron should consider their options to help in the investigation or take advantage of the SEC Whistleblower program. Under the new program, whistleblowers who provide original information may receive rewards totaling up to 30 percent of any successful recovery made by the SEC. For more information, call Reed Kathrein at 844-916-0895 or email [email protected].
About Hagens Berman
Hagens Berman is a global plaintiffs' rights complex litigation firm focusing on corporate accountability. The firm is home to a robust practice and represents investors as well as whistleblowers, workers, consumers and others in cases achieving real results for those harmed by corporate negligence and other wrongdoings. Hagens Berman's team has secured more than $2.9 billion in this area of law. More about the firm and its successes can be found at hbsslaw.com. Follow the firm for updates and news at @ClassActionLaw.
Attorney Advertising. Prior results do not guarantee a similar outcome in any future case.
Faruqi & Faruqi, LLP Securities Litigation Partner James (Josh) Wilson Encourages Investors Who Suffered Losses In Regeneron To Contact Him Directly To Discuss Their Options
If you purchased or acquired securities in Regeneron between August 1, 2025 and May 15, 2026 and would like to discuss your legal rights, call Faruqi & Faruqi partner Josh Wilson directly at 877-247-4292 or 212-983-9330 (Ext. 1310).
[You may also click here for additional information]
New York, New York--(Newsfile Corp. - September 7, 2026) - Faruqi & Faruqi, LLP, a leading national securities law firm, is investigating potential claims against Regeneron Pharmaceuticals, Inc. ("Regeneron" or the "Company") (NASDAQ: REGN) and reminds investors of the September 14, 2026 deadline to seek the role of lead plaintiff in a federal securities class action that has been filed against the Company.
Faruqi & Faruqi is a leading national securities law firm with offices in New York, Pennsylvania, California and Georgia. The firm has recovered hundreds of millions of dollars for investors since its founding in 1995. See www.faruqilaw.com.
As detailed below, the complaint alleges that the Company and its executives violated federal securities laws by making false and/or misleading statements and/or failing to disclose the true state of Regeneron's Phase III Fianlimab-Libtayo Study; notably, that its preliminary statistical assumptions were fundamentally flawed, that the active treatment arm was failing to achieve meaningful clinical differentiation over standard therapies, and that the trial would ultimately fail to reach statistical significance on its primary endpoint even without overperformance of the control arm.
On April 29, 2026, Defendants disclosed that the Phase III Fianlimab-Libtayo Study had been altered, expanding the number of patients in the study eligible for "analysis of progression-free survival." On this news, Regeneron's stock price fell $45.41, or approximately 6.2%, to close at $686.36 per share on April 29, 2026.
On May 15, 2026, Regeneron issued a press release announcing that the "Phase 3 Trial of Fianlimab . . . did not reach statistical significance for the primary endpoint of improvement in progression-free survival (PFS)." On this news, Regeneron's stock price fell $68.57, or approximately 9.8%, to close at $629.68 per share on May 18, 2026.
The court-appointed lead plaintiff is the investor with the largest financial interest in the relief sought by the class who is adequate and typical of class members who directs and oversees the litigation on behalf of the putative class. Any member of the putative class may move the Court to serve as lead plaintiff through counsel of their choice, or may choose to do nothing and remain an absent class member. Your ability to share in any recovery is not affected by the decision to serve as a lead plaintiff or not.
Faruqi & Faruqi, LLP also encourages anyone with information regarding Regeneron's conduct to contact the firm, including whistleblowers, former employees, shareholders and others.
To learn more about the Regeneron class action, go to www.faruqilaw.com/REGN or call Faruqi & Faruqi partner Josh Wilson directly at 877-247-4292 or 212-983-9330 (Ext. 1310).
Follow us for updates on LinkedIn, on X, or on Facebook.
Frequently Asked Questions (FAQ) for Investors Regarding the Regeneron Securities Class Action Lawsuit:
What is the Regeneron securities fraud lawsuit about?
Faruqi & Faruqi, LLP has filed a securities class action lawsuit against Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) on behalf of investors who purchased Regeneron securities during the Class Period. The lawsuit alleges that Regeneron and certain of its officers made materially false and misleading statements regarding the Phase III Fianlimab-Libtayo clinical study. Specifically, the complaint alleges that defendants concealed that the study's preliminary statistical assumptions were fundamentally flawed, that the active treatment arm was allegedly failing to achieve meaningful clinical differentiation over standard therapies, and that the trial would ultimately fail to reach statistical significance on its primary endpoint. The alleged fraud is said to have come to light through two disclosures: first, on April 29, 2026, when defendants announced an expansion of patients eligible for analysis of progression-free survival — causing Regeneron's stock to fall approximately 6.2% — and then on May 15, 2026, when Regeneron announced that the Phase III trial did not reach statistical significance for its primary endpoint, causing the stock to fall an additional approximately 9.8%.
Who may be eligible to participate in the lawsuit?
Investors who purchased or otherwise acquired Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) securities on the NASDAQ between August 1, 2025 and May 15, 2026, inclusive (the "Class Period"), may be eligible to participate in this lawsuit. Eligibility to participate is not limited to those who seek appointment as lead plaintiff; any investor who purchased Regeneron securities during the Class Period and suffered a loss may potentially share in any recovery obtained on behalf of the class. Investors are encouraged to review their trading records to determine whether their purchases fall within the Class Period. Participation in the litigation does not require investors to take any active litigation role beyond filing a timely claim if a recovery is ultimately achieved.
What is a lead plaintiff, and how can I seek appointment?
A lead plaintiff is a court-appointed representative who acts on behalf of all class members in directing the litigation, including working with counsel to make key strategic decisions regarding the case. Any investor who purchased Regeneron securities during the Class Period and suffered losses may move the court for appointment as lead plaintiff, but must do so no later than September 14, 2026, which is the court-established deadline for such motions. Courts generally appoint the movant with the largest financial interest in the relief sought who also satisfies the adequacy requirements of the applicable securities laws. Importantly, investors are not required to seek appointment as lead plaintiff in order to participate in or potentially share in any recovery that may result from this litigation. Those who do not seek lead plaintiff status may still submit a claim and may be eligible to receive a portion of any settlement or judgment obtained on behalf of the class.
What should investors do if they purchased Regeneron stock during the Class Period?
Investors who purchased Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) securities between August 1, 2025 and May 15, 2026 are encouraged to promptly review their brokerage and trading records to confirm the timing and size of their purchases and any resulting losses. Investors should take steps to preserve all relevant documentation, including trade confirmations, account statements, and any communications relating to their Regeneron holdings, as such records may be material to any future claim. Given that the lead plaintiff motion deadline is September 14, 2026, investors who wish to be considered for that role should act in advance of that date. Investors may wish to consult with Faruqi & Faruqi, LLP to better understand their legal rights and options before the deadline passes. Retaining counsel or seeking lead plaintiff status is not required to participate in any potential class recovery, but timely action is advisable to preserve all available options.
Why should investors contact Faruqi & Faruqi, LLP?
Faruqi & Faruqi, LLP has represented investors in securities litigation for decades and has recovered hundreds of millions of dollars for shareholders. Investors who purchased Regeneron securities during the Class Period may contact the firm to discuss their legal rights, potential claims, and the lead plaintiff process at no cost or obligation.
Attorney Advertising. The law firm responsible for this advertisement is Faruqi & Faruqi, LLP (www.faruqilaw.com). Prior results do not guarantee or predict a similar outcome with respect to any future matter. We welcome the opportunity to discuss your particular case. All communications will be treated in a confidential manner.
To view the source version of this press release, please visit https://www.newsfilecorp.com/release/313099
Source: Faruqi & Faruqi LLP
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California State Teachers Retirement System increased its position in Regeneron Pharmaceuticals, Inc. (NASDAQ:REGN – Free Report) by 63,274.2% in the second quarter, according to the company in its most recent filing with the Securities & Exchange Commission. The firm owned 97,723,683 shares of the biopharmaceutical company’s stock after purchasing an additional 97,569,482 shares during the quarter. California State Teachers Retirement System owned approximately 94.91% of Regeneron Pharmaceuticals worth $60,934,625,000 as of its most recent filing with the Securities & Exchange Commission.
Several other hedge funds and other institutional investors also recently added to or reduced their stakes in REGN. Western Wealth Management LLC purchased a new stake in shares of Regeneron Pharmaceuticals in the 1st quarter worth about $26,000. SHP Wealth Management bought a new stake in Regeneron Pharmaceuticals during the fourth quarter worth about $26,000. Titan Wealth CI Ltd bought a new stake in Regeneron Pharmaceuticals during the fourth quarter worth about $29,000. Kemnay Advisory Services Inc. purchased a new stake in Regeneron Pharmaceuticals in the fourth quarter worth about $31,000. Finally, Birchwood Financial Partners Inc. purchased a new stake in Regeneron Pharmaceuticals in the fourth quarter worth about $32,000. 83.31% of the stock is owned by hedge funds and other institutional investors.
Wall Street Analyst Weigh In Several research firms have recently issued reports on REGN. Sanford C. Bernstein upgraded shares of Regeneron Pharmaceuticals to a “hold” rating in a report on Wednesday, July 29th. HSBC reduced their price objective on Regeneron Pharmaceuticals from $990.00 to $880.00 and set a “buy” rating for the company in a research report on Monday, July 6th. BMO Capital Markets cut their target price on Regeneron Pharmaceuticals from $900.00 to $730.00 and set an “outperform” rating on the stock in a research note on Monday, May 18th. Weiss Ratings reaffirmed a “hold (c)” rating on shares of Regeneron Pharmaceuticals in a research report on Wednesday, June 24th. Finally, Truist Financial upped their price target on shares of Regeneron Pharmaceuticals from $769.00 to $772.00 and gave the stock a “buy” rating in a research note on Friday, July 31st. Fourteen equities research analysts have rated the stock with a Buy rating and ten have given a Hold rating to the stock. According to data from MarketBeat, Regeneron Pharmaceuticals presently has a consensus rating of “Moderate Buy” and a consensus price target of $800.36.
Get Our Latest Stock Analysis on REGN Regeneron Pharmaceuticals Price Performance REGN stock opened at $827.72 on Monday. The stock has a market capitalization of $85.22 billion, a P/E ratio of 20.46, a P/E/G ratio of 1.62 and a beta of 0.20. The company has a debt-to-equity ratio of 0.06, a current ratio of 3.34 and a quick ratio of 2.78. Regeneron Pharmaceuticals, Inc. has a 1-year low of $541.00 and a 1-year high of $859.34. The business has a fifty day moving average price of $738.29 and a 200-day moving average price of $719.51.
Regeneron Pharmaceuticals (NASDAQ:REGN – Get Free Report) last released its quarterly earnings data on Thursday, July 30th. The biopharmaceutical company reported $14.29 EPS for the quarter, beating the consensus estimate of $10.16 by $4.13. Regeneron Pharmaceuticals had a return on equity of 13.47% and a net margin of 27.86%.The company had revenue of $4.29 billion for the quarter, compared to analysts’ expectations of $3.82 billion. During the same period last year, the firm posted $12.81 earnings per share. Regeneron Pharmaceuticals’s revenue was up 16.7% compared to the same quarter last year. Equities analysts forecast that Regeneron Pharmaceuticals, Inc. will post 44.25 earnings per share for the current fiscal year.
Regeneron Pharmaceuticals Announces Dividend The business also recently declared a quarterly dividend, which was paid on Monday, August 31st. Stockholders of record on Tuesday, August 18th were paid a $0.94 dividend. The ex-dividend date was Tuesday, August 18th. This represents a $3.76 dividend on an annualized basis and a dividend yield of 0.5%. Regeneron Pharmaceuticals’s payout ratio is currently 9.29%.
Here are the key news stories impacting Regeneron Pharmaceuticals this week:
Positive Sentiment: Recent commentary continues to view Regeneron as a potentially attractive long-term biotech investment, supported by its established commercial portfolio, development pipeline and strong financial profile. However, the comparison with Vertex reportedly gives Vertex the clearer near-term investment edge. Vertex vs. Regeneron: Which Biotech Giant Is the Better Buy Right Now? Neutral Sentiment: Regeneron’s Phase 1/2 study combining cemiplimab with SNS-101 has been completed, providing a pipeline milestone, although no efficacy or regulatory results were released. Cemiplimab Combination Trial Completion Negative Sentiment: Several law firms are recruiting investors for a securities class action alleging that Regeneron and certain executives misled shareholders about the viability and risks of the Phase 3 Fianlimab-Libtayo trial, including its protocol change and failure to meet the primary endpoint. Investors have until September 14, 2026, to seek lead-plaintiff status. The allegations have not been proven, but the litigation creates potential reputational, legal and financial risks. Regeneron Class Action Deadline Alert Negative Sentiment: Director Kathryn Guarini sold 400 shares for $340,000, while EVP Marion McCourt sold 2,346 shares for approximately $2.0 million. All sales were made under pre-arranged Rule 10b5-1 plans, reducing their value as discretionary bearish signals, but the transactions may weigh on sentiment near recent highs. SEC Insider Transaction Filing Insider Activity at Regeneron Pharmaceuticals In other Regeneron Pharmaceuticals news, EVP Marion Mccourt sold 1,131 shares of the business’s stock in a transaction on Thursday, September 3rd. The shares were sold at an average price of $857.39, for a total transaction of $969,708.09. Following the completion of the sale, the executive vice president directly owned 12,003 shares in the company, valued at approximately $10,291,252.17. The trade was a 8.61% decrease in their position. The sale was disclosed in a filing with the Securities & Exchange Commission, which is accessible through this hyperlink. The transaction was executed under a pre-arranged Rule 10b5-1 trading plan. Also, Director Huda Y. Zoghbi sold 800 shares of the stock in a transaction on Monday, August 10th. The shares were sold at an average price of $800.00, for a total value of $640,000.00. Following the transaction, the director directly owned 1,703 shares in the company, valued at $1,362,400. The trade was a 31.96% decrease in their ownership of the stock. The SEC filing for this sale provides additional information. The transaction was executed under a pre-arranged Rule 10b5-1 trading plan. Over the last three months, insiders have sold 4,146 shares of company stock valued at $3,432,488. Insiders own 6.97% of the company’s stock.
About Regeneron Pharmaceuticals (Free Report)
Regeneron Pharmaceuticals, Inc (NASDAQ: REGN) is a U.S.-based biotechnology company founded in 1988 and headquartered in Tarrytown, New York. It focuses on discovering, developing, manufacturing and commercializing medicines for serious medical conditions. The company combines laboratory research, clinical development and in-house manufacturing to advance a pipeline of biologic therapies across multiple therapeutic areas.
Regeneron is known for its proprietary drug discovery technologies, including its VelocImmune platform, which is used to generate fully human monoclonal antibodies.
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LOS ANGELES, Sept. 07, 2026 (GLOBE NEWSWIRE) -- Schall, Brown & Schwartz LLP (“SBS”), a national shareholder rights litigation firm, reminds investors of a class action lawsuit against Regeneron Pharmaceuticals, Inc. (“Regeneron” or “the Company”) (NASDAQ: REGN) for violations of §§10(b) and 20(a) of the Securities Exchange Act of 1934 and Rule 10b-5 promulgated thereunder by the U.S. Securities and Exchange Commission.
Shareholders who purchased shares of REGN during the class period listed are encouraged to contact the firm regarding possible lead plaintiff appointments. Appointment as lead plaintiff is not required to partake in any recovery.
CLASS PERIOD: August 1, 2025 to May 15, 2026
DEADLINE: September 14, 2026
If you are a shareholder who suffered a loss, click here to participate.
CASE DETAILS: According to the Complaint, the Company made false and misleading statements to the market. Regeneron led investors to believe that its Phase III Fianlimab-Libtayo Study was likely to succeed by achieving its primary endpoint. The Company utilized flawed statistical assumptions. In fact, the Company failed to demonstrate clinical differentiation from other therapies. Based on these facts, the Company’s public statements were false and materially misleading throughout the class period. When the market learned the truth about Regeneron, investors suffered damages.
We also encourage you to contact Brian Schall or David Schwartz of Schall, Brown & Schwartz LLP, 2049 Century Park East, Suite 2460, Los Angeles, CA 90067, at 310-301-3335, to discuss your rights free of charge. You can also reach us through the firm's website at www.schallfirm.com, or by email at [email protected].
The class, in this case, has not yet been certified, and until certification occurs, you are not represented by an attorney. If you choose to take no action, you can remain an absent class member.
Join the case to recover your losses
WHY SBS? Schall, Brown & Schwartz LLP represents investors around the world and specializes in securities class action lawsuits and shareholder rights litigation. Bringing together the extensive experience and diverse skillsets of founding partners Brian Schall, Andrew Brown, and David Schwartz, SBS is dedicated to aggressively advocating for every investor.
This press release may be considered Attorney Advertising in some jurisdictions under the applicable law and rules of ethics.
CONTACT:
Schall, Brown & Schwartz LLP
Brian Schall, Esq.,
Andrew Brown, Esq.,
David Schwartz, Esq.,
www.schallfirm.com
Office: 310-301-3335 [email protected]
San Diego, California--(Newsfile Corp. - September 6, 2026) - Robbins Geller Rudman & Dowd LLP announces that purchasers or acquirers of Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) common stock between August 1, 2025 and May 15, 2026, both dates inclusive (the "Class Period"), have until September 14, 2026 to seek appointment as lead plaintiff of the Regeneron class action lawsuit. Captioned Cheatham v. Regeneron Pharmaceuticals, Inc., No. 26-cv-06026 (S.D.N.Y.), the Regeneron class action lawsuit charges Regeneron and certain of Regeneron's top executives with violations of the Securities Exchange Act of 1934.
If you suffered substantial losses and wish to serve as lead plaintiff of the Regeneron class action lawsuit, please provide your information here:
You can also contact attorneys Ken Dolitsky or Michael Albert of Robbins Geller by calling 800/851-7783 or via e-mail at [email protected].
CASE ALLEGATIONS: Regeneron is a pharmaceutical company that discovers, invents, develops, manufactures, tests, and commercializes medicines to treat various disorders worldwide.
The Regeneron class action lawsuit alleges that defendants throughout the Class Period made false and/or misleading statements and/or failed to disclose that: (i) defendants created the false impression that they possessed reliable information demonstrating that Regeneron's Phase III Fianlimab-Libtayo Study was well-poised for success, while minimizing risks to the study's odds of achieving its primary endpoint and its overall statistical validity arising from the prolonged event rate slowdown; (ii) Regeneron's preliminary statistical assumptions were fundamentally flawed; (iii) the active treatment arm was failing to achieve meaningful clinical differentiation over standard therapies; and (iv) the trial would ultimately fail to reach statistical significance on its primary endpoint even without overperformance of the control arm.
On April 29, 2026, during Regeneron's first quarter earnings call, defendants allegedly disclosed that the Phase III Fianlimab-Libtayo Study had been altered, expanding the number of patients in the study eligible for "analysis of progression-free survival." On this news, the price of Regeneron stock declined more than 6%, according to the complaint.
Then, after-market on May 15, 2026, Regeneron issued a press release allegedly announcing that the "Phase 3 Trial of Fianlimab . . . did not reach statistical significance for the primary endpoint of improvement in progression-free survival (PFS)." On this news, the price of Regeneron stock dropped nearly 10%, according to the complaint.
THE LEAD PLAINTIFF PROCESS: The Private Securities Litigation Reform Act of 1995 permits any investor who purchased or acquired Regeneron common stock during the Class Period to seek appointment as lead plaintiff in the Regeneron class action lawsuit. A lead plaintiff is generally the movant with the greatest financial interest in the relief sought by the putative class who is also typical and adequate of the putative class. A lead plaintiff acts on behalf of all other class members in directing the Regeneron class action lawsuit. The lead plaintiff can select a law firm of its choice to litigate the Regeneron class action lawsuit. An investor's ability to share in any potential future recovery is not dependent upon serving as lead plaintiff of the Regeneron class action lawsuit.
ABOUT ROBBINS GELLER: Robbins Geller Rudman & Dowd LLP is one of the world's leading law firms representing investors in securities fraud and shareholder rights litigation. Our Firm ranked #1 on the most recent ISS Securities Class Action Services Top 50 Report, recovering more than $916 million for investors in 2025. This marks our fourth #1 ranking in the past five years. And in those five years alone, Robbins Geller recovered $8.4 billion for investors – $3.4 billion more than any other law firm. With 200 lawyers in 10 offices, Robbins Geller is one of the largest plaintiffs' firms in the world, and the Firm's attorneys have obtained many of the largest securities class action recoveries in history, including the largest ever – $7.2 billion – in In re Enron Corp. Sec. Litig. Please visit the following page for more information:
NEW YORK, Sept. 06, 2026 (GLOBE NEWSWIRE) -- Bronstein, Gewirtz & Grossman, LLC, a nationally recognized investor-rights law firm, announces that a class action lawsuit has been filed against Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) and certain of its officers.
This lawsuit seeks to recover damages against Defendants for alleged violations of the federal securities laws on behalf of all persons and entities that purchased or otherwise acquired Regeneron securities between August 1, 2025 and May 15, 2026, both dates inclusive (the “Class Period”). Such investors are encouraged to join this case by visiting the firm’s site: bgandg.com/REGN.
Regeneron Case Details
The Complaint alleges that, throughout the Class Period, Defendants made materially false and/or misleading statements and/or failed to disclose that:
(1) the preliminary statistical assumptions underlying Regeneron’s Phase III Fianlimab-Libtayo study were fundamentally flawed;
(2) the study’s active treatment arm was not demonstrating meaningful clinical differentiation from standard therapies;
(3) the study was unlikely to achieve statistical significance with respect to its primary endpoint, even absent overperformance by the control arm; and
(4) as a result, the Company’s statements regarding the study’s design, progress, and prospects were materially false and/or misleading at all relevant times.
What's Next for Regeneron Investors?
A class action lawsuit has already been filed. If you wish to review a copy of the Complaint, you can visit the firm’s site: bgandg.com/REGN. or you may contact Peretz Bronstein, Esq. or his Client Relations Manager, Nathan Miller, of Bronstein, Gewirtz & Grossman, LLC at 917-590-0911. If you suffered a loss in Regeneron you have until September 14, 2026, to request that the Court appoint you as lead plaintiff. Your ability to share in any recovery doesn't require that you serve as lead plaintiff.
No Cost to Regeneron Investors
We, Bronstein, Gewirtz & Grossman LLC, represent investors in class actions on a contingency fee basis. That means we will ask the court to reimburse us for out-of-pocket expenses and attorneys’ fees, usually a percentage of the total recovery, only if we are successful.
Why Bronstein, Gewirtz & Grossman, LLC for Regeneron Securities Class Action?
Bronstein, Gewirtz & Grossman, LLC is a nationally recognized firm that represents investors in securities fraud class actions and shareholder derivative suits. Our firm has recovered hundreds of millions of dollars for investors nationwide. More at www.bgandg.com
"Our practice centers on restoring investor capital and ensuring corporate accountability, which serves to uphold the essential integrity of the marketplace," said Peretz Bronstein, Founding Partner of Bronstein, Gewirtz & Grossman, LLC.
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Contact Info
Peretz Bronstein, Esq. or Nathan Miller
Bronstein, Gewirtz & Grossman, LLC
917-590-0911 | [email protected]
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Prior results do not guarantee similar outcomes.
Faruqi & Faruqi, LLP Securities Litigation Partner James (Josh) Wilson Encourages Investors Who Suffered Losses In Regeneron To Contact Him Directly To Discuss Their Options
If you purchased or acquired securities in Regeneron between August 1, 2025 and May 15, 2026 and would like to discuss your legal rights, call Faruqi & Faruqi partner Josh Wilson directly at 877-247-4292 or 212-983-9330 (Ext. 1310).
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New York, New York--(Newsfile Corp. - September 6, 2026) - Faruqi & Faruqi, LLP, a leading national securities law firm, is investigating potential claims against Regeneron Pharmaceuticals, Inc. ("Regeneron" or the "Company") (NASDAQ: REGN) and reminds investors of the September 14, 2026 deadline to seek the role of lead plaintiff in a federal securities class action that has been filed against the Company.
Faruqi & Faruqi is a leading national securities law firm with offices in New York, Pennsylvania, California and Georgia. The firm has recovered hundreds of millions of dollars for investors since its founding in 1995. See www.faruqilaw.com.
As detailed below, the complaint alleges that the Company and its executives violated federal securities laws by making false and/or misleading statements and/or failing to disclose the true state of Regeneron's Phase III Fianlimab-Libtayo Study; notably, that its preliminary statistical assumptions were fundamentally flawed, that the active treatment arm was failing to achieve meaningful clinical differentiation over standard therapies, and that the trial would ultimately fail to reach statistical significance on its primary endpoint even without overperformance of the control arm.
On April 29, 2026, Defendants disclosed that the Phase III Fianlimab-Libtayo Study had been altered, expanding the number of patients in the study eligible for "analysis of progression-free survival." On this news, Regeneron's stock price fell $45.41, or approximately 6.2%, to close at $686.36 per share on April 29, 2026.
On May 15, 2026, Regeneron issued a press release announcing that the "Phase 3 Trial of Fianlimab . . . did not reach statistical significance for the primary endpoint of improvement in progression-free survival (PFS)." On this news, Regeneron's stock price fell $68.57, or approximately 9.8%, to close at $629.68 per share on May 18, 2026.
The court-appointed lead plaintiff is the investor with the largest financial interest in the relief sought by the class who is adequate and typical of class members who directs and oversees the litigation on behalf of the putative class. Any member of the putative class may move the Court to serve as lead plaintiff through counsel of their choice, or may choose to do nothing and remain an absent class member. Your ability to share in any recovery is not affected by the decision to serve as a lead plaintiff or not.
Faruqi & Faruqi, LLP also encourages anyone with information regarding Regeneron's conduct to contact the firm, including whistleblowers, former employees, shareholders and others.
To learn more about the Regeneron class action, go to www.faruqilaw.com/REGN or call Faruqi & Faruqi partner Josh Wilson directly at 877-247-4292 or 212-983-9330 (Ext. 1310).
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Frequently Asked Questions (FAQ) for Investors Regarding the Regeneron Securities Class Action Lawsuit:
What is the Regeneron securities fraud lawsuit about?
Faruqi & Faruqi, LLP has filed a securities class action lawsuit against Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) on behalf of investors who purchased Regeneron securities during the Class Period. The lawsuit alleges that Regeneron and certain of its officers made materially false and misleading statements regarding the Phase III Fianlimab-Libtayo clinical study. Specifically, the complaint alleges that defendants concealed that the study's preliminary statistical assumptions were fundamentally flawed, that the active treatment arm was allegedly failing to achieve meaningful clinical differentiation over standard therapies, and that the trial would ultimately fail to reach statistical significance on its primary endpoint. The alleged fraud is said to have come to light through two disclosures: first, on April 29, 2026, when defendants announced an expansion of patients eligible for analysis of progression-free survival — causing Regeneron's stock to fall approximately 6.2% — and then on May 15, 2026, when Regeneron announced that the Phase III trial did not reach statistical significance for its primary endpoint, causing the stock to fall an additional approximately 9.8%.
Who may be eligible to participate in the lawsuit?
Investors who purchased or otherwise acquired Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) securities on the NASDAQ between August 1, 2025 and May 15, 2026, inclusive (the "Class Period"), may be eligible to participate in this lawsuit. Eligibility to participate is not limited to those who seek appointment as lead plaintiff; any investor who purchased Regeneron securities during the Class Period and suffered a loss may potentially share in any recovery obtained on behalf of the class. Investors are encouraged to review their trading records to determine whether their purchases fall within the Class Period. Participation in the litigation does not require investors to take any active litigation role beyond filing a timely claim if a recovery is ultimately achieved.
What is a lead plaintiff, and how can I seek appointment?
A lead plaintiff is a court-appointed representative who acts on behalf of all class members in directing the litigation, including working with counsel to make key strategic decisions regarding the case. Any investor who purchased Regeneron securities during the Class Period and suffered losses may move the court for appointment as lead plaintiff, but must do so no later than September 14, 2026, which is the court-established deadline for such motions. Courts generally appoint the movant with the largest financial interest in the relief sought who also satisfies the adequacy requirements of the applicable securities laws. Importantly, investors are not required to seek appointment as lead plaintiff in order to participate in or potentially share in any recovery that may result from this litigation. Those who do not seek lead plaintiff status may still submit a claim and may be eligible to receive a portion of any settlement or judgment obtained on behalf of the class.
What should investors do if they purchased Regeneron stock during the Class Period?
Investors who purchased Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) securities between August 1, 2025 and May 15, 2026 are encouraged to promptly review their brokerage and trading records to confirm the timing and size of their purchases and any resulting losses. Investors should take steps to preserve all relevant documentation, including trade confirmations, account statements, and any communications relating to their Regeneron holdings, as such records may be material to any future claim. Given that the lead plaintiff motion deadline is September 14, 2026, investors who wish to be considered for that role should act in advance of that date. Investors may wish to consult with Faruqi & Faruqi, LLP to better understand their legal rights and options before the deadline passes. Retaining counsel or seeking lead plaintiff status is not required to participate in any potential class recovery, but timely action is advisable to preserve all available options.
Why should investors contact Faruqi & Faruqi, LLP?
Faruqi & Faruqi, LLP has represented investors in securities litigation for decades and has recovered hundreds of millions of dollars for shareholders. Investors who purchased Regeneron securities during the Class Period may contact the firm to discuss their legal rights, potential claims, and the lead plaintiff process at no cost or obligation.
Attorney Advertising. The law firm responsible for this advertisement is Faruqi & Faruqi, LLP (www.faruqilaw.com). Prior results do not guarantee or predict a similar outcome with respect to any future matter. We welcome the opportunity to discuss your particular case. All communications will be treated in a confidential manner.
To view the source version of this press release, please visit https://www.newsfilecorp.com/release/313055
Source: Faruqi & Faruqi LLP
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B. Metzler seel. Sohn and Co. AG grew its holdings in shares of Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) by 37.5% during the undefined quarter, according to the company in its most recent 13F filing with the Securities and Exchange Commission. The fund owned 4,472 shares of the biopharmaceutical company's stock after purchasing an
AlphaGrep UK Ltd acquired a new position in shares of Regeneron Pharmaceuticals, Inc. (NASDAQ:REGN – Free Report) in the 2nd quarter, according to its most recent 13F filing with the Securities and Exchange Commission (SEC). The firm acquired 1,943 shares of the biopharmaceutical company’s stock, valued at approximately $1,212,000. Regeneron Pharmaceuticals comprises 0.4% of AlphaGrep UK Ltd’s portfolio, making the stock its 22nd largest holding.
A number of other institutional investors also recently made changes to their positions in the company. SHP Wealth Management bought a new position in shares of Regeneron Pharmaceuticals during the fourth quarter worth approximately $26,000. Western Wealth Management LLC bought a new stake in Regeneron Pharmaceuticals in the 1st quarter valued at $26,000. Titan Wealth CI Ltd acquired a new position in Regeneron Pharmaceuticals in the 4th quarter valued at $29,000. Trust Co. of Vermont bought a new position in Regeneron Pharmaceuticals during the 2nd quarter worth $29,000. Finally, Mowery & Schoenfeld Wealth Management LLC bought a new position in Regeneron Pharmaceuticals during the 2nd quarter worth $29,000. Institutional investors own 83.31% of the company’s stock.
Here are the key news stories impacting Regeneron Pharmaceuticals this week:
Positive Sentiment: Recent commentary continues to view Regeneron as a potentially attractive long-term biotech investment, supported by its established commercial portfolio, development pipeline and strong financial profile. However, the comparison with Vertex reportedly gives Vertex the clearer near-term investment edge. Vertex vs. Regeneron: Which Biotech Giant Is the Better Buy Right Now? Neutral Sentiment: Regeneron’s Phase 1/2 study combining cemiplimab with SNS-101 has been completed, providing a pipeline milestone, although no efficacy or regulatory results were released. Cemiplimab Combination Trial Completion Negative Sentiment: Several law firms are recruiting investors for a securities class action alleging that Regeneron and certain executives misled shareholders about the viability and risks of the Phase 3 Fianlimab-Libtayo trial, including its protocol change and failure to meet the primary endpoint. Investors have until September 14, 2026, to seek lead-plaintiff status. The allegations have not been proven, but the litigation creates potential reputational, legal and financial risks. Regeneron Class Action Deadline Alert Negative Sentiment: Director Kathryn Guarini sold 400 shares for $340,000, while EVP Marion McCourt sold 2,346 shares for approximately $2.0 million. All sales were made under pre-arranged Rule 10b5-1 plans, reducing their value as discretionary bearish signals, but the transactions may weigh on sentiment near recent highs. SEC Insider Transaction Filing Insider Buying and Selling at Regeneron Pharmaceuticals In other Regeneron Pharmaceuticals news, EVP Marion Mccourt sold 1,131 shares of the company’s stock in a transaction that occurred on Thursday, September 3rd. The shares were sold at an average price of $857.39, for a total value of $969,708.09. Following the completion of the transaction, the executive vice president directly owned 12,003 shares in the company, valued at approximately $10,291,252.17. This represents a 8.61% decrease in their position. The sale was disclosed in a legal filing with the SEC, which can be accessed through this link. The transaction was executed under a pre-arranged Rule 10b5-1 trading plan. Also, Director Arthur Ryan sold 200 shares of the firm’s stock in a transaction on Thursday, July 2nd. The shares were sold at an average price of $650.15, for a total transaction of $130,030.00. Following the transaction, the director directly owned 17,303 shares of the company’s stock, valued at $11,249,545.45. The trade was a 1.14% decrease in their position. Additional details regarding this sale are available in the official SEC disclosure. The transaction was executed under a pre-arranged Rule 10b5-1 trading plan. Over the last 90 days, insiders sold 4,146 shares of company stock valued at $3,432,488. 6.97% of the stock is owned by insiders. Analysts Set New Price Targets REGN has been the subject of a number of recent research reports. Guggenheim boosted their target price on shares of Regeneron Pharmaceuticals from $1,000.00 to $1,030.00 and gave the company a “buy” rating in a research report on Monday, August 3rd. Cantor Fitzgerald raised their price target on shares of Regeneron Pharmaceuticals from $750.00 to $795.00 and gave the stock an “overweight” rating in a research report on Friday, July 31st. HSBC dropped their price objective on shares of Regeneron Pharmaceuticals from $990.00 to $880.00 and set a “buy” rating for the company in a research note on Monday, July 6th. Royal Bank Of Canada increased their target price on shares of Regeneron Pharmaceuticals from $696.00 to $737.00 and gave the stock a “sector perform” rating in a research report on Friday, July 31st. Finally, BMO Capital Markets lowered their target price on shares of Regeneron Pharmaceuticals from $900.00 to $730.00 and set an “outperform” rating on the stock in a report on Monday, May 18th. Fourteen research analysts have rated the stock with a Buy rating and ten have given a Hold rating to the company. According to data from MarketBeat.com, the stock presently has an average rating of “Moderate Buy” and an average target price of $800.36.
View Our Latest Stock Analysis on REGN
Regeneron Pharmaceuticals Trading Down 1.9% NASDAQ REGN opened at $827.72 on Friday. The company has a market cap of $85.22 billion, a price-to-earnings ratio of 20.46, a price-to-earnings-growth ratio of 1.65 and a beta of 0.20. Regeneron Pharmaceuticals, Inc. has a twelve month low of $541.00 and a twelve month high of $859.34. The company has a quick ratio of 2.78, a current ratio of 3.34 and a debt-to-equity ratio of 0.06. The business’s fifty day moving average is $738.29 and its 200 day moving average is $720.10.
Regeneron Pharmaceuticals (NASDAQ:REGN – Get Free Report) last issued its earnings results on Thursday, July 30th. The biopharmaceutical company reported $14.29 earnings per share (EPS) for the quarter, topping analysts’ consensus estimates of $10.16 by $4.13. The business had revenue of $4.29 billion during the quarter, compared to analysts’ expectations of $3.82 billion. Regeneron Pharmaceuticals had a return on equity of 13.47% and a net margin of 27.86%.The business’s revenue for the quarter was up 16.7% compared to the same quarter last year. During the same quarter in the prior year, the firm earned $12.81 EPS. As a group, sell-side analysts expect that Regeneron Pharmaceuticals, Inc. will post 44.25 EPS for the current fiscal year.
Regeneron Pharmaceuticals Announces Dividend The firm also recently announced a quarterly dividend, which was paid on Monday, August 31st. Investors of record on Tuesday, August 18th were given a dividend of $0.94 per share. The ex-dividend date was Tuesday, August 18th. This represents a $3.76 annualized dividend and a yield of 0.5%. Regeneron Pharmaceuticals’s dividend payout ratio (DPR) is currently 9.29%.
About Regeneron Pharmaceuticals (Free Report)
Regeneron Pharmaceuticals, Inc (NASDAQ: REGN) is a U.S.-based biotechnology company founded in 1988 and headquartered in Tarrytown, New York. It focuses on discovering, developing, manufacturing and commercializing medicines for serious medical conditions. The company combines laboratory research, clinical development and in-house manufacturing to advance a pipeline of biologic therapies across multiple therapeutic areas.
Regeneron is known for its proprietary drug discovery technologies, including its VelocImmune platform, which is used to generate fully human monoclonal antibodies.
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San Diego, California--(Newsfile Corp. - September 5, 2026) - The law firm of Robbins Geller Rudman & Dowd LLP announces that purchasers or acquirers of Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) common stock between August 1, 2025 and May 15, 2026, both dates inclusive (the "Class Period"), have until September 14, 2026 to seek appointment as lead plaintiff of the Regeneron class action lawsuit. Captioned Cheatham v. Regeneron Pharmaceuticals, Inc., No. 26-cv-06026 (S.D.N.Y.), the Regeneron class action lawsuit charges Regeneron and certain of Regeneron's top executives with violations of the Securities Exchange Act of 1934.
If you suffered substantial losses and wish to serve as lead plaintiff of the Regeneron class action lawsuit, please provide your information here:
You can also contact attorneys Ken Dolitsky or Michael Albert of Robbins Geller by calling 800/851-7783 or via e-mail at [email protected].
CASE ALLEGATIONS: Regeneron is a pharmaceutical company that discovers, invents, develops, manufactures, tests, and commercializes medicines to treat various disorders worldwide.
The Regeneron class action lawsuit alleges that defendants throughout the Class Period made false and/or misleading statements and/or failed to disclose that: (i) defendants created the false impression that they possessed reliable information demonstrating that Regeneron's Phase III Fianlimab-Libtayo Study was well-poised for success, while minimizing risks to the study's odds of achieving its primary endpoint and its overall statistical validity arising from the prolonged event rate slowdown; (ii) Regeneron's preliminary statistical assumptions were fundamentally flawed; (iii) the active treatment arm was failing to achieve meaningful clinical differentiation over standard therapies; and (iv) the trial would ultimately fail to reach statistical significance on its primary endpoint even without overperformance of the control arm.
On April 29, 2026, during Regeneron's first quarter earnings call, defendants allegedly disclosed that the Phase III Fianlimab-Libtayo Study had been altered, expanding the number of patients in the study eligible for "analysis of progression-free survival." On this news, the price of Regeneron stock declined more than 6%, according to the complaint.
Then, after-market on May 15, 2026, Regeneron issued a press release allegedly announcing that the "Phase 3 Trial of Fianlimab . . . did not reach statistical significance for the primary endpoint of improvement in progression-free survival (PFS)." On this news, the price of Regeneron stock dropped nearly 10%, according to the complaint.
THE LEAD PLAINTIFF PROCESS: The Private Securities Litigation Reform Act of 1995 permits any investor who purchased or acquired Regeneron common stock during the Class Period to seek appointment as lead plaintiff in the Regeneron class action lawsuit. A lead plaintiff is generally the movant with the greatest financial interest in the relief sought by the putative class who is also typical and adequate of the putative class. A lead plaintiff acts on behalf of all other class members in directing the Regeneron class action lawsuit. The lead plaintiff can select a law firm of its choice to litigate the Regeneron class action lawsuit. An investor's ability to share in any potential future recovery is not dependent upon serving as lead plaintiff of the Regeneron class action lawsuit.
ABOUT ROBBINS GELLER: Robbins Geller Rudman & Dowd LLP is one of the world's leading law firms representing investors in securities fraud and shareholder rights litigation. Our Firm ranked #1 on the most recent ISS Securities Class Action Services Top 50 Report, recovering more than $916 million for investors in 2025. This marks our fourth #1 ranking in the past five years. And in those five years alone, Robbins Geller recovered $8.4 billion for investors – $3.4 billion more than any other law firm. With 200 lawyers in 10 offices, Robbins Geller is one of the largest plaintiffs' firms in the world, and the Firm's attorneys have obtained many of the largest securities class action recoveries in history, including the largest ever – $7.2 billion – in In re Enron Corp. Sec. Litig. Please visit the following page for more information:
SAN DIEGO, Sept. 04, 2026 (GLOBE NEWSWIRE) -- Robbins LLP reminds investors that a securities class action has been filed on behalf of investors who purchased or otherwise acquired Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) securities between August 1, 2025 and May 15, 2026, inclusive (the “Class Period”).
The lawsuit alleges that Regeneron Pharmaceuticals misled investors regarding the viability and prospects of its Phase 3 Fianlimab-Libtayo clinical trial for patients with advanced melanoma. Specifically, investors were not adequately informed about alleged problems with the study's statistical assumptions, the lack of meaningful clinical differentiation between the treatment and control arms, and the alleged risk that the trial would fail to meet its primary endpoint.
Investors who suffered losses during the Class Period may have legal rights and should be aware of the September 14, 2026 deadline to seek appointment as lead plaintiff.
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Why Was Regeneron Sued?
According to the complaint, Regeneron was developing Fianlimab, a human monoclonal antibody targeting the LAG-3 immune checkpoint receptor on T-cells. Fianlimab was being evaluated in combination with Libtayo in a Phase 3 clinical trial investigating whether the combination could serve as a first-line treatment for patients with advanced melanoma.
The Phase 3 Fianlimab-Libtayo study began enrolling patients in mid-2022. The complaint alleges that Regeneron provided investors with positive statements about the study while failing to disclose material information concerning its prospects.
Specifically, plaintiff alleges that Regeneron failed to disclose that:
(i) the study's preliminary statistical assumptions were fundamentally flawed;
(ii) the Fianlimab-Libtayo treatment arm was failing to achieve meaningful clinical differentiation from standard therapies; and
(iii) the trial was ultimately unlikely to achieve statistical significance on its primary endpoint, even without unusually strong performance by the control arm.
The complaint alleges that these omissions caused Regeneron's stock to trade at artificially inflated prices.
What Happened to Regeneron Stock?
According to the complaint, information concerning the Phase 3 Fianlimab-Libtayo study emerged through a series of disclosures in April and May 2026.
April 29, 2026: Regeneron Discloses Changes to the Phase 3 Study
On April 29, 2026, during Regeneron's first-quarter earnings call, defendants disclosed that the Phase 3 Fianlimab-Libtayo study had been modified to expand the number of patients eligible for analysis of progression-free survival (PFS).
Following the disclosure, Regeneron's stock price fell from $731.77 per share on April 28, 2026, to $686.36 per share on April 29, 2026, a decline of approximately 6.2% in a single trading day.
May 15, 2026: Fianlimab-Libtayo Trial Fails to Meet Primary Endpoint
After the market closed on May 15, 2026, Regeneron announced that its Phase 3 Fianlimab trial did not achieve statistical significance for the primary endpoint of improvement in progression-free survival.
Following the announcement, Regeneron's stock price declined from $698.25 per share on May 15, 2026, to $629.68 per share on May 18, 2026, a decline of approximately 9.8%.
The complaint alleges that these disclosures revealed information that contradicted or called into question Regeneron's prior statements concerning the clinical trial.
Who May Be Eligible?
The proposed class includes investors who purchased or otherwise acquired Regeneron Pharmaceuticals, Inc. securities between August 1, 2025 and May 15, 2026. If you purchased REGN securities during this period and suffered losses, you may have rights under the federal securities laws.
What Is a Lead Plaintiff?
The lead plaintiff is an investor appointed by the court to represent the interests of the proposed class throughout the litigation. Investors do not have to serve as lead plaintiff to potentially share in any future recovery if the lawsuit is successful.
The deadline to seek appointment as lead plaintiff is September 14, 2026.
Does It Cost Anything to Participate?
No. Robbins LLP represents investors on a contingency fee basis.
Contact Robbins LLP
Investors seeking additional information about the Regeneron securities class action may submit an inquiry through Robbins LLP's website, email attorney Aaron Dumas, Jr., or call (800) 350-6003.
About Robbins LLP
A recognized leader in shareholder rights litigation, Robbins LLP has helped restore more than $1 billion in value to shareholders and secured some of the largest recoveries in shareholder derivative litigation history.
"Behind everything we do is the belief that companies should be governed responsibly, fiduciaries should be held accountable, and shareholders deserve transparency and fairness," said Brian J. Robbins, Founding Partner of Robbins LLP.
To be notified if a class action against Regeneron Pharmaceuticals, Inc. settles or to receive free alerts when corporate executives engage in wrongdoing, sign up for Stock Watch today.
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San Francisco, California--(Newsfile Corp. - September 4, 2026) - Hagens Berman Sobol Shapiro LLP alerts investors in Regeneron Pharmaceuticals (NASDAQ: REGN) that a securities class action lawsuit has been filed after its surprising revelations concerning a Phase 3 clinical trial of a therapy intended to treat patients with melanoma.
The news that the trial failed drove the price of Regeneron shares sharply lower and, along with the severe market reaction ($11 billion market cap wipeout), triggered the lawsuit which seeks to represent investors who purchased or otherwise acquired shares of Regeneron common stock between August 1, 2025 and May 15, 2026.
National shareholder rights firm Hagens Berman is investigating the legal claims and urges Regeneron investors with substantial losses to submit your losses now. The firm also invites persons who may be able to assist in the investigation to contact its attorneys.
View our latest video summary of the allegations: youtu.be/rsW1-f8ARRs
Class Period: Aug. 1, 2025 - May 15, 2026
Lead Plaintiff Deadline: Sept. 14, 2026
Visit: www.hbsslaw.com/regn
Contact the Firm Now: [email protected]
844-916-0895
Regeneron Pharmaceuticals, Inc. (REGN) Securities Class Action:
The litigation is focused on the propriety of Regeneron's repeated optimism about the state of- (and changes to-) its Phase 3 trial of Fianlimab in combination with Libtayo as a first-line treatment for metastatic or locally advanced melanoma (the "Study").
The Study's primary endpoint was progression-free survival ("PFS") and Regeneron has characterized the combination as a "potential blockbuster." "Events" – disease progression or death – determined the timing and statistical power of the primary PFS analysis.
The complaint alleges that Regeneron made false and misleading statements while failing to disclose critical information to investors. In particular, the lawsuit accuses the company and its management of not informing investors that the Study's preliminary statistical assumptions were flawed, the active treatment arm was not achieving meaningful differentiation over standard therapies, and achievement of its primary endpoint was unlikely.
Throughout the Class Period, Regeneron and the other defendants assured investors of their confidence in the Trial's achieving its primary endpoint even when events were slowing down. At one point, management said the slowing event rates are "because the test arms are performing well."
The truth began to emerge on April 29, 2026, when Regeneron first revealed that it decided to alter the Trial protocol such that "t]he primary analysis of progression-free survival will now consider all patients enrolled in the study with a minimum follow-up of 6 months."
One prominent analyst reportedly questioned whether the decision was made because, in contrast to management's expressed confidence, the "underlying PFS benefit may be insufficient to show statistical significance."
Then, on May 12, 2026, Regeneron admitted that the decision to alter the Trial protocol was made in response to "slow event rates," occurred nearly six months ago, and was "submitted it to all the global regulatory authorities in November, December timeframe."
Three days later, the final blow came. On May 15, 2026, Regeneron abruptly reported the "trial did not reach statistical significance of the primary endpoint of improvement in progression-free survival (PFS)."
"We're focused on whether Regeneron altered the Trial protocol without timely telling investors to intentionally mislead them because the defendants knew so-called blockbuster potential for the combination wasn't really there," said Reed Kathrein, the Hagens Berman partner leading the firm's investigation of the pending claims in the suit.
If you invested in Regeneron and have substantial losses, or have knowledge that will assist the firm's investigation, submit your losses now »
If you'd like more information and answers to other frequently asked questions about the Regeneron case and the firm's investigation, read more »
Whistleblowers: Persons with non-public information regarding Regeneron should consider their options to help in the investigation or take advantage of the SEC Whistleblower program. Under the new program, whistleblowers who provide original information may receive rewards totaling up to 30 percent of any successful recovery made by the SEC. For more information, call Reed Kathrein at 844-916-0895 or email [email protected].
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About Hagens Berman
Hagens Berman is a global plaintiffs' rights complex litigation firm focusing on corporate accountability. The firm is home to a robust practice and represents investors as well as whistleblowers, workers, consumers and others in cases achieving real results for those harmed by corporate negligence and other wrongdoings. Hagens Berman's team has secured more than $2.9 billion in this area of law. More about the firm and its successes can be found at hbsslaw.com. Follow the firm for updates and news at @ClassActionLaw.
Attorney Advertising. Prior results do not guarantee a similar outcome in any future case.
Contact: Hagens Berman, Reed Kathrein, 715 Hearst Avenue, Suite 300, Berkeley, CA 94710, 844-916-0895, [email protected]
To view the source version of this press release, please visit https://www.newsfilecorp.com/release/312997
Source: Hagens Berman Sobol Shapiro LLP
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Faruqi & Faruqi, LLP Securities Litigation Partner James (Josh) Wilson Encourages Investors Who Suffered Losses In Regeneron To Contact Him Directly To Discuss Their Options
If you purchased or acquired securities in Regeneron between August 1, 2025 and May 15, 2026 and would like to discuss your legal rights, call Faruqi & Faruqi partner Josh Wilson directly at 877-247-4292 or 212-983-9330 (Ext. 1310).
[You may also click here for additional information]
New York, New York--(Newsfile Corp. - September 4, 2026) - Faruqi & Faruqi, LLP, a leading national securities law firm, is investigating potential claims against Regeneron Pharmaceuticals, Inc. ("Regeneron" or the "Company") (NASDAQ: REGN) and reminds investors of the September 14, 2026 deadline to seek the role of lead plaintiff in a federal securities class action that has been filed against the Company.
Faruqi & Faruqi is a leading national securities law firm with offices in New York, Pennsylvania, California and Georgia. The firm has recovered hundreds of millions of dollars for investors since its founding in 1995. See www.faruqilaw.com.
As detailed below, the complaint alleges that the Company and its executives violated federal securities laws by making false and/or misleading statements and/or failing to disclose the true state of Regeneron's Phase III Fianlimab-Libtayo Study; notably, that its preliminary statistical assumptions were fundamentally flawed, that the active treatment arm was failing to achieve meaningful clinical differentiation over standard therapies, and that the trial would ultimately fail to reach statistical significance on its primary endpoint even without overperformance of the control arm.
On April 29, 2026, Defendants disclosed that the Phase III Fianlimab-Libtayo Study had been altered, expanding the number of patients in the study eligible for "analysis of progression-free survival." On this news, Regeneron's stock price fell $45.41, or approximately 6.2%, to close at $686.36 per share on April 29, 2026.
On May 15, 2026, Regeneron issued a press release announcing that the "Phase 3 Trial of Fianlimab . . . did not reach statistical significance for the primary endpoint of improvement in progression-free survival (PFS)." On this news, Regeneron's stock price fell $68.57, or approximately 9.8%, to close at $629.68 per share on May 18, 2026.
The court-appointed lead plaintiff is the investor with the largest financial interest in the relief sought by the class who is adequate and typical of class members who directs and oversees the litigation on behalf of the putative class. Any member of the putative class may move the Court to serve as lead plaintiff through counsel of their choice, or may choose to do nothing and remain an absent class member. Your ability to share in any recovery is not affected by the decision to serve as a lead plaintiff or not.
Faruqi & Faruqi, LLP also encourages anyone with information regarding Regeneron's conduct to contact the firm, including whistleblowers, former employees, shareholders and others.
To learn more about the Regeneron class action, go to www.faruqilaw.com/REGN or call Faruqi & Faruqi partner Josh Wilson directly at 877-247-4292 or 212-983-9330 (Ext. 1310).
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Frequently Asked Questions (FAQ) for Investors Regarding the Regeneron Securities Class Action Lawsuit:
What is the Regeneron securities fraud lawsuit about?
Faruqi & Faruqi, LLP has filed a securities class action lawsuit against Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) on behalf of investors who purchased Regeneron securities during the Class Period. The lawsuit alleges that Regeneron and certain of its officers made materially false and misleading statements regarding the Phase III Fianlimab-Libtayo clinical study. Specifically, the complaint alleges that defendants concealed that the study's preliminary statistical assumptions were fundamentally flawed, that the active treatment arm was allegedly failing to achieve meaningful clinical differentiation over standard therapies, and that the trial would ultimately fail to reach statistical significance on its primary endpoint. The alleged fraud is said to have come to light through two disclosures: first, on April 29, 2026, when defendants announced an expansion of patients eligible for analysis of progression-free survival — causing Regeneron's stock to fall approximately 6.2% — and then on May 15, 2026, when Regeneron announced that the Phase III trial did not reach statistical significance for its primary endpoint, causing the stock to fall an additional approximately 9.8%.
Who may be eligible to participate in the lawsuit?
Investors who purchased or otherwise acquired Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) securities on the NASDAQ between August 1, 2025 and May 15, 2026, inclusive (the "Class Period"), may be eligible to participate in this lawsuit. Eligibility to participate is not limited to those who seek appointment as lead plaintiff; any investor who purchased Regeneron securities during the Class Period and suffered a loss may potentially share in any recovery obtained on behalf of the class. Investors are encouraged to review their trading records to determine whether their purchases fall within the Class Period. Participation in the litigation does not require investors to take any active litigation role beyond filing a timely claim if a recovery is ultimately achieved.
What is a lead plaintiff, and how can I seek appointment?
A lead plaintiff is a court-appointed representative who acts on behalf of all class members in directing the litigation, including working with counsel to make key strategic decisions regarding the case. Any investor who purchased Regeneron securities during the Class Period and suffered losses may move the court for appointment as lead plaintiff, but must do so no later than September 14, 2026, which is the court-established deadline for such motions. Courts generally appoint the movant with the largest financial interest in the relief sought who also satisfies the adequacy requirements of the applicable securities laws. Importantly, investors are not required to seek appointment as lead plaintiff in order to participate in or potentially share in any recovery that may result from this litigation. Those who do not seek lead plaintiff status may still submit a claim and may be eligible to receive a portion of any settlement or judgment obtained on behalf of the class.
What should investors do if they purchased Regeneron stock during the Class Period?
Investors who purchased Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) securities between August 1, 2025 and May 15, 2026 are encouraged to promptly review their brokerage and trading records to confirm the timing and size of their purchases and any resulting losses. Investors should take steps to preserve all relevant documentation, including trade confirmations, account statements, and any communications relating to their Regeneron holdings, as such records may be material to any future claim. Given that the lead plaintiff motion deadline is September 14, 2026, investors who wish to be considered for that role should act in advance of that date. Investors may wish to consult with Faruqi & Faruqi, LLP to better understand their legal rights and options before the deadline passes. Retaining counsel or seeking lead plaintiff status is not required to participate in any potential class recovery, but timely action is advisable to preserve all available options.
Why should investors contact Faruqi & Faruqi, LLP?
Faruqi & Faruqi, LLP has represented investors in securities litigation for decades and has recovered hundreds of millions of dollars for shareholders. Investors who purchased Regeneron securities during the Class Period may contact the firm to discuss their legal rights, potential claims, and the lead plaintiff process at no cost or obligation.
Attorney Advertising. The law firm responsible for this advertisement is Faruqi & Faruqi, LLP (www.faruqilaw.com). Prior results do not guarantee or predict a similar outcome with respect to any future matter. We welcome the opportunity to discuss your particular case. All communications will be treated in a confidential manner.
To view the source version of this press release, please visit https://www.newsfilecorp.com/release/312902
Source: Faruqi & Faruqi LLP
Ready to Announce with Confidence? Send us a message and a member of our TMX Newsfile team will contact you to discuss your needs.
, /PRNewswire/ -- Robbins Geller Rudman & Dowd LLP announces that purchasers or acquirers of Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) common stock between August 1, 2025 and May 15, 2026, inclusive (the "Class Period"), have until September 14, 2026 to seek appointment as lead plaintiff of the Regeneron class action lawsuit. Captioned Cheatham v. Regeneron Pharmaceuticals, Inc., No. 26-cv-06026 (S.D.N.Y.), the Regeneron class action lawsuit charges Regeneron and certain of Regeneron's top executives with violations of the Securities Exchange Act of 1934.
If you suffered substantial losses and wish to serve as lead plaintiff of the Regeneron class action lawsuit, please provide your information here:
You can also contact attorneys Ken Dolitsky or Michael Albert of Robbins Geller by calling 800/851-7783 or via e-mail at [email protected].
CASE ALLEGATIONS: Regeneron is a pharmaceutical company that discovers, invents, develops, manufactures, tests, and commercializes medicines to treat various disorders worldwide.
The Regeneron class action lawsuit alleges that defendants throughout the Class Period made false and/or misleading statements and/or failed to disclose that: (i) defendants created the false impression that they possessed reliable information demonstrating that Regeneron's Phase III Fianlimab-Libtayo Study was well-poised for success, while minimizing risks to the study's odds of achieving its primary endpoint and its overall statistical validity arising from the prolonged event rate slowdown; (ii) Regeneron's preliminary statistical assumptions were fundamentally flawed; (iii) the active treatment arm was failing to achieve meaningful clinical differentiation over standard therapies; and (iv) the trial would ultimately fail to reach statistical significance on its primary endpoint even without overperformance of the control arm.
On April 29, 2026, during Regeneron's first quarter earnings call, defendants allegedly disclosed that the Phase III Fianlimab-Libtayo Study had been altered, expanding the number of patients in the study eligible for "analysis of progression-free survival." On this news, the price of Regeneron stock declined more than 6%, according to the complaint.
Then, after-market on May 15, 2026, Regeneron issued a press release allegedly announcing that the "Phase 3 Trial of Fianlimab . . . did not reach statistical significance for the primary endpoint of improvement in progression-free survival (PFS)." On this news, the price of Regeneron stock dropped nearly 10%, according to the complaint.
THE LEAD PLAINTIFF PROCESS: The Private Securities Litigation Reform Act of 1995 permits any investor who purchased or acquired Regeneron common stock during the Class Period to seek appointment as lead plaintiff in the Regeneron class action lawsuit. A lead plaintiff is generally the movant with the greatest financial interest in the relief sought by the putative class who is also typical and adequate of the putative class. A lead plaintiff acts on behalf of all other class members in directing the Regeneron class action lawsuit. The lead plaintiff can select a law firm of its choice to litigate the Regeneron class action lawsuit. An investor's ability to share in any potential future recovery is not dependent upon serving as lead plaintiff of the Regeneron class action lawsuit.
ABOUT ROBBINS GELLER: Robbins Geller Rudman & Dowd LLP is one of the world's leading law firms representing investors in securities fraud and shareholder rights litigation. Our Firm ranked #1 on the most recent ISS Securities Class Action Services Top 50 Report, recovering more than $916 million for investors in 2025. This marks our fourth #1 ranking in the past five years. And in those five years alone, Robbins Geller recovered $8.4 billion for investors – $3.4 billion more than any other law firm. With 200 lawyers in 10 offices, Robbins Geller is one of the largest plaintiffs' firms in the world, and the Firm's attorneys have obtained many of the largest securities class action recoveries in history, including the largest ever – $7.2 billion – in In re Enron Corp. Sec. Litig. Please visit the following page for more information:
, /PRNewswire/ -- Hagens Berman Sobol Shapiro LLP alerts investors in Regeneron Pharmaceuticals (NASDAQ: REGN) that a securities class action lawsuit has been filed after its surprising revelations concerning a Phase 3 clinical trial of a therapy intended to treat patients with melanoma.
The news that the trial failed drove the price of Regeneron shares sharply lower and, along with the severe market reaction ($11 billion market cap wipeout), triggered the lawsuit which seeks to represent investors who purchased or otherwise acquired shares of Regeneron common stock between August 1, 2025 and May 15, 2026.
National shareholder rights firm Hagens Berman is investigating the legal claims and urges Regeneron investors with substantial losses to submit your losses now. The firm also invites persons who may be able to assist in the investigation to contact its attorneys.
View our latest video summary of the allegations: youtu.be/rsW1-f8ARRs
Class Period: Aug. 1, 2025 – May 15, 2026
Lead Plaintiff Deadline: Sept. 14, 2026
Visit: www.hbsslaw.com/regn
Contact the Firm Now: [email protected]
844-916-0895
Regeneron Pharmaceuticals, Inc. (REGN) Securities Class Action:
The litigation is focused on the propriety of Regeneron's repeated optimism about the state of- (and changes to-) its Phase 3 trial of Fianlimab in combination with Libtayo as a first-line treatment for metastatic or locally advanced melanoma (the "Study").
The Study's primary endpoint was progression-free survival ("PFS") and Regeneron has characterized the combination as a "potential blockbuster." "Events" – disease progression or death – determined the timing and statistical power of the primary PFS analysis.
The complaint alleges that Regeneron made false and misleading statements while failing to disclose critical information to investors. In particular, the lawsuit accuses the company and its management of not informing investors that the Study's preliminary statistical assumptions were flawed, the active treatment arm was not achieving meaningful differentiation over standard therapies, and achievement of its primary endpoint was unlikely.
Throughout the Class Period, Regeneron and the other defendants assured investors of their confidence in the Trial's achieving its primary endpoint even when events were slowing down. At one point, management said the slowing event rates are "because the test arms are performing well."
The truth began to emerge on April 29, 2026, when Regeneron first revealed that it decided to alter the Trial protocol such that "t]he primary analysis of progression-free survival will now consider all patients enrolled in the study with a minimum follow-up of 6 months."
One prominent analyst reportedly questioned whether the decision was made because, in contrast to management's expressed confidence, the "underlying PFS benefit may be insufficient to show statistical significance."
Then, on May 12, 2026, Regeneron admitted that the decision to alter the Trial protocol was made in response to "slow event rates," occurred nearly six months ago, and was "submitted it to all the global regulatory authorities in November, December timeframe."
Three days later, the final blow came. On May 15, 2026, Regeneron abruptly reported the "trial did not reach statistical significance of the primary endpoint of improvement in progression-free survival (PFS)."
"We're focused on whether Regeneron altered the Trial protocol without timely telling investors to intentionally mislead them because the defendants knew so-called blockbuster potential for the combination wasn't really there," said Reed Kathrein, the Hagens Berman partner leading the firm's investigation of the pending claims in the suit.
If you invested in Regeneron and have substantial losses, or have knowledge that will assist the firm's investigation, submit your losses now »
If you'd like more information and answers to other frequently asked questions about the Regeneron case and the firm's investigation, read more »
Whistleblowers: Persons with non-public information regarding Regeneron should consider their options to help in the investigation or take advantage of the SEC Whistleblower program. Under the new program, whistleblowers who provide original information may receive rewards totaling up to 30 percent of any successful recovery made by the SEC. For more information, call Reed Kathrein at 844-916-0895 or email [email protected].
About Hagens Berman
Hagens Berman is a global plaintiffs' rights complex litigation firm focusing on corporate accountability. The firm is home to a robust practice and represents investors as well as whistleblowers, workers, consumers and others in cases achieving real results for those harmed by corporate negligence and other wrongdoings. Hagens Berman's team has secured more than $2.9 billion in this area of law. More about the firm and its successes can be found at hbsslaw.com. Follow the firm for updates and news at @ClassActionLaw.
Attorney Advertising. Prior results do not guarantee a similar outcome in any future case.
INVESTOR ALERT: Pomerantz Law Firm Investigates Claims On Behalf of Investors of EyePoint, Inc. - EYPT PR Newswire
NEW YORK, Sept. 3, 2026
, /PRNewswire/ -- Pomerantz LLP is investigating claims on behalf of investors of EyePoint, Inc. ("EyePoint" or the "Company") (NASDAQ: EYPT). Such investors are advised to contact Danielle Peyton at [email protected] or 646-581-9980, ext. 7980.
The investigation concerns whether EyePoint and certain of its officers and/or directors have engaged in securities fraud or other unlawful business practices.
[Click here for information about joining the class action]
On August 17, 2026, EyePoint issued a press release "announc[ing] topline results from LUGANO, the first pivotal Phase 3 clinical trial for DURAVYU™ (vorolanib intravitreal insert) for the treatment of wet age-related macular degeneration (wet AMD)." The press release disclosed that change from baseline in best corrected visual acuity versus 2 mg aflibercept (Regeneron Pharmaceuticals' (REGN) Eylea) was not met in the entire dataset.
On this news, EyePoint's stock price fell $9.88 per share, or 66.98%, to close at $4.87 per share on August 17, 2026.
Pomerantz LLP, with offices in New York, Chicago, Los Angeles, London, Paris, and Tel Aviv, is acknowledged as one of the premier firms in the areas of corporate, securities, and antitrust class litigation. Founded by the late Abraham L. Pomerantz, known as the dean of the class action bar, Pomerantz pioneered the field of securities class actions. Today, more than 85 years later, Pomerantz continues in the tradition he established, fighting for the rights of the victims of securities fraud, breaches of fiduciary duty, and corporate misconduct. The Firm has recovered numerous multimillion-dollar damages awards on behalf of class members. See www.pomlaw.com.
Attorney advertising. Prior results do not guarantee similar outcomes.
View original content to download multimedia:https://www.prnewswire.com/news-releases/investor-alert-pomerantz-law-firm-investigates-claims-on-behalf-of-investors-of-eyepoint-inc---eypt-302868659.html
, /PRNewswire/ -- Pomerantz LLP announces that a class action lawsuit has been filed against Regeneron Pharmaceuticals, Inc. ("Regeneron" or the "Company") (NASDAQ: REGN). Such investors are advised to contact Danielle Peyton at [email protected] or 646-581-9980, (or 888.4-POMLAW), toll-free, Ext. 7980. Those who inquire by e-mail are encouraged to include their mailing address, telephone number, and the number of shares purchased.
The class action concerns whether Regeneron and certain of its officers and/or directors have engaged in securities fraud or other unlawful business practices.
You have until September 14, 2026, to ask the Court to appoint you as Lead Plaintiff for the class if you purchased or otherwise acquired Regeneron securities during the Class Period. A copy of the Complaint can be obtained at www.pomerantzlaw.com.
[Click here for information about joining the class action]
On April 29, 2026, during during Regeneron's first quarter earnings call, the Company disclosed that the Phase III Fianlimab-Libtayo Study had been altered, expanding the number of patients in the study eligible for "analysis of progression-free survival."
On this news, Regeneron's stock price fell $45.41 per share, or 6.21%, to close at $686.36 per share on April 29, 2026.
Then, on May 15, 2026, Regeneron issued a press release disclosing that the "Phase 3 Trial of Fianlimab . . . did not reach statistical significance for the primary endpoint of improvement in progression-free survival (PFS)."
On this news, Regeneron's stock price fell $68.57 per share, or 9.82%, to close at $629.68 per share on May 16, 2026.
Pomerantz LLP, with offices in New York, Chicago, Los Angeles, London, Paris, and Tel Aviv, is acknowledged as one of the premier firms in the areas of corporate, securities, and antitrust class litigation. Founded by the late Abraham L. Pomerantz, known as the dean of the class action bar, Pomerantz pioneered the field of securities class actions. Today, more than 85 years later, Pomerantz continues in the tradition he established, fighting for the rights of the victims of securities fraud, breaches of fiduciary duty, and corporate misconduct. The Firm has recovered numerous multimillion-dollar damages awards on behalf of class members. See www.pomlaw.com.
Attorney advertising. Prior results do not guarantee similar outcomes.
Market impact notice: REGN shares allegedly lost $102.09 from the Class Period high after disclosures about a Phase III Fianlimab-Libtayo protocol change and failed primary endpoint challenged earlier positive trial-risk messaging.
, /PRNewswire/ -- SueWallSt notifies investors in Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) that a class action has been filed on behalf of shareholders who purchased securities between August 1, 2025 and May 15, 2026. Find out if you may qualify to recover losses. You may also contact Joseph E. Levi, Esq. at [email protected] or (888) SueWallSt.
REGN declined from $731.77 on April 28, 2026 to $629.68 after the May 15, 2026 after-market disclosure was reflected in trading, a $102.09 per-share drop, or approximately 13.95%. Investors seeking appointment as lead plaintiff must move the Court by September 14, 2026.
Market Impact From the Alleged Fianlimab-Libtayo Disclosure Shift
The securities action alleges that Regeneron and certain executives gave investors an overly positive view of the Phase III Fianlimab-Libtayo Study while minimizing the risk that slowing progression-free survival event accrual signaled statistical and clinical trial problems. The complaint contends that the market began repricing REGN shares after Regeneron disclosed on April 29, 2026 that the trial protocol had been altered to expand the patient population eligible for PFS analysis.
A second market reaction followed Regeneron's May 15, 2026 announcement that the Phase 3 trial did not reach statistical significance for the primary endpoint of improvement in PFS. The lawsuit asserts that these disclosures corrected earlier alleged misstatements and caused investors who purchased during the Class Period to suffer damages.
REGN Stock Movement and Trial-Readout Impact
REGN closed at $731.77 on April 28, 2026 before the protocol-change disclosure. Shares fell to $686.36 on April 29, 2026, a one-day decline of about 6.2%. Regeneron later announced after market close on May 15, 2026 that the Fianlimab Phase 3 trial did not reach statistical significance on PFS. On May 18, 2026, the first trading day after that announcement, REGN closed at $629.68. The total decline from the April 28 price to the May 18 close was $102.09 per share. Why the Market Reaction Matters for REGN Investors
The filing states that investors allegedly were not given adequate information about the risk that the prolonged event-accrual slowdown reflected flawed statistical assumptions and insufficient clinical differentiation from standard therapies. Analysts cited in the complaint reportedly connected the April 29 protocol amendment to concerns that the underlying PFS benefit may have been insufficient to show statistical significance.
"Market reactions of this magnitude can be significant evidence of investor harm when a complaint alleges that earlier statements failed to disclose material clinical-trial risks. Here, the alleged disconnect between optimistic trial-related statements and the Phase III study's subsequent failure to meet its primary PFS endpoint is central to the market-impact theory." -- Joseph E. Levi, Esq.
Submit your information here or call (888) SueWallSt.
WHY SUEWALLST: SueWallSt is powered by Levi & Korsinsky LLP. Levi & Korsinsky LLP has established itself as a nationally-recognized securities litigation firm that has secured hundreds of millions of dollars for aggrieved shareholders and built a track record of winning high-stakes cases. The firm has extensive expertise representing investors in complex securities litigation and a team of over 70 employees to serve our clients. For seven years in a row, Levi & Korsinsky has ranked in ISS Securities Class Action Services' Top 50 Report as one of the top securities litigation firms in the United States.
Frequently Asked Questions About the REGN Lawsuit
Q: What court was the REGN class action filed in? A: The case was filed in the United States District Court for the Southern District of New York and is governed by the Private Securities Litigation Reform Act of 1995.
Q: What is the REGN class action lawsuit about? A: A securities class action has been filed against Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) alleging materially false and misleading statements between August 1, 2025 and May 15, 2026. Shares fell approximately 13.95% after the Company disclosed a Phase III Fianlimab-Libtayo protocol change and later announced that the trial did not reach statistical significance for improvement in progression-free survival. Investors who purchased shares during the Class Period and suffered losses may be eligible to seek compensation.
Q: How much did REGN stock drop? A: Shares declined approximately 13.95%, or $102.09 per share, from the April 28, 2026 closing price of $731.77 to the May 18, 2026 closing price of $629.68 following the alleged corrective disclosures. Investors who purchased shares during the Class Period at allegedly artificially inflated prices and suffered losses may be eligible to seek compensation.
Q: What is a lead plaintiff and why does it matter? A: A lead plaintiff is the investor appointed by the court to represent the entire class. Lead plaintiffs are typically investors with the largest documented losses. Being appointed does not increase individual recovery but gives direct oversight of how the case is run.
Q: What documents do I need to submit my information? A: Brokerage statements or trade confirmations showing purchase dates, share quantities, prices paid, and any subsequent sale dates and prices.
Q: What if I already sold my REGN shares, can I still recover losses? A: Yes. Eligibility is based on when you purchased, not whether you still hold the shares. Investors who bought during the Class Period and sold at a loss may still be eligible to participate.
Q: Do I need to go to court or give testimony? A: No. The overwhelming majority of class members never appear in court or give depositions. If there is a settlement or recovery, eligible class members generally submit a claim form to seek their portion.
Q: What if I live outside the United States? A: U.S. securities class actions generally cover purchases on U.S. exchanges regardless of the investor's country of residence.
CONTACT:
Levi & Korsinsky, LLP
Joseph E. Levi, Esq.
33 Whitehall Street, 27th Floor
New York, NY 10004
[email protected]
Tel: (888) SueWallSt
Fax: (212) 363-7171
Attorney Advertising. Prior results do not guarantee similar outcomes.
LOS ANGELES, Sept. 03, 2026 (GLOBE NEWSWIRE) -- Schall, Brown & Schwartz LLP (“SBS”), a national shareholder rights litigation firm, reminds investors of a class action lawsuit against Regeneron Pharmaceuticals, Inc. (“Regeneron” or “the Company”) (NASDAQ: REGN) for violations of §§10(b) and 20(a) of the Securities Exchange Act of 1934 and Rule 10b-5 promulgated thereunder by the U.S. Securities and Exchange Commission.
Shareholders who purchased shares of REGN during the class period listed are encouraged to contact the firm regarding possible lead plaintiff appointments. Appointment as lead plaintiff is not required to partake in any recovery.
CLASS PERIOD: August 1, 2025 to May 15, 2026
DEADLINE: September 14, 2026
If you are a shareholder who suffered a loss, click here to participate.
CASE DETAILS: According to the Complaint, the Company made false and misleading statements to the market. Regeneron led investors to believe that its Phase III Fianlimab-Libtayo Study was likely to succeed by achieving its primary endpoint. The Company utilized flawed statistical assumptions. In fact, the Company failed to demonstrate clinical differentiation from other therapies. Based on these facts, the Company’s public statements were false and materially misleading throughout the class period. When the market learned the truth about Regeneron, investors suffered damages.
We also encourage you to contact Brian Schall or David Schwartz of Schall, Brown & Schwartz LLP, 2049 Century Park East, Suite 2460, Los Angeles, CA 90067, at 310-301-3335, to discuss your rights free of charge. You can also reach us through the firm's website at www.schallfirm.com, or by email at [email protected].
The class, in this case, has not yet been certified, and until certification occurs, you are not represented by an attorney. If you choose to take no action, you can remain an absent class member.
Join the case to recover your losses
WHY SBS? Schall, Brown & Schwartz LLP represents investors around the world and specializes in securities class action lawsuits and shareholder rights litigation. Bringing together the extensive experience and diverse skillsets of founding partners Brian Schall, Andrew Brown, and David Schwartz, SBS is dedicated to aggressively advocating for every investor.
This press release may be considered Attorney Advertising in some jurisdictions under the applicable law and rules of ethics.
CONTACT:
Schall, Brown & Schwartz LLP
Brian Schall, Esq.,
Andrew Brown, Esq.,
David Schwartz, Esq.,
www.schallfirm.com
Office: 310-301-3335 [email protected]
SAN FRANCISCO, Sept. 02, 2026 (GLOBE NEWSWIRE) -- Hagens Berman Sobol Shapiro LLP alerts investors in Regeneron Pharmaceuticals (NASDAQ: REGN) that a securities class action lawsuit has been filed after its surprising revelations concerning a Phase 3 clinical trial of a therapy intended to treat patients with melanoma.
The news that the trial failed drove the price of Regeneron shares sharply lower and, along with the severe market reaction ($11 billion market cap wipeout), triggered the lawsuit which seeks to represent investors who purchased or otherwise acquired shares of Regeneron common stock between August 1, 2025 and May 15, 2026.
National shareholder rights firm Hagens Berman is investigating the legal claims and urges Regeneron investors with substantial losses to submit your losses now. The firm also invites persons who may be able to assist in the investigation to contact its attorneys.
View our latest video summary of the allegations: youtu.be/rsW1-f8ARRs
Class Period: Aug. 1, 2025 – May 15, 2026
Lead Plaintiff Deadline: Sept. 14, 2026
Visit: www.hbsslaw.com/regn
Contact the Firm Now: [email protected]
844-916-0895
Regeneron Pharmaceuticals, Inc. (REGN) Securities Class Action:
The litigation is focused on the propriety of Regeneron’s repeated optimism about the state of- (and changes to-) its Phase 3 trial of Fianlimab in combination with Libtayo as a first-line treatment for metastatic or locally advanced melanoma (the “Study”).
The Study’s primary endpoint was progression-free survival (“PFS”) and Regeneron has characterized the combination as a “potential blockbuster.” “Events” – disease progression or death – determined the timing and statistical power of the primary PFS analysis.
The complaint alleges that Regeneron made false and misleading statements while failing to disclose critical information to investors. In particular, the lawsuit accuses the company and its management of not informing investors that the Study’s preliminary statistical assumptions were flawed, the active treatment arm was not achieving meaningful differentiation over standard therapies, and achievement of its primary endpoint was unlikely.
Throughout the Class Period, Regeneron and the other defendants assured investors of their confidence in the Trial’s achieving its primary endpoint even when events were slowing down. At one point, management said the slowing event rates are “because the test arms are performing well.”
The truth began to emerge on April 29, 2026, when Regeneron first revealed that it decided to alter the Trial protocol such that “t]he primary analysis of progression-free survival will now consider all patients enrolled in the study with a minimum follow-up of 6 months.”
One prominent analyst reportedly questioned whether the decision was made because, in contrast to management’s expressed confidence, the “underlying PFS benefit may be insufficient to show statistical significance.”
Then, on May 12, 2026, Regeneron admitted that the decision to alter the Trial protocol was made in response to “slow event rates,” occurred nearly six months ago, and was “submitted it to all the global regulatory authorities in November, December timeframe.”
Three days later, the final blow came. On May 15, 2026, Regeneron abruptly reported the “trial did not reach statistical significance of the primary endpoint of improvement in progression-free survival (PFS).”
“We’re focused on whether Regeneron altered the Trial protocol without timely telling investors to intentionally mislead them because the defendants knew so-called blockbuster potential for the combination wasn’t really there,” said Reed Kathrein, the Hagens Berman partner leading the firm’s investigation of the pending claims in the suit.
If you invested in Regeneron and have substantial losses, or have knowledge that will assist the firm’s investigation, submit your losses now »
If you’d like more information and answers to other frequently asked questions about the Regeneron case and the firm’s investigation, read more »
Whistleblowers: Persons with non-public information regarding Regeneron should consider their options to help in the investigation or take advantage of the SEC Whistleblower program. Under the new program, whistleblowers who provide original information may receive rewards totaling up to 30 percent of any successful recovery made by the SEC. For more information, call Reed Kathrein at 844-916-0895 or email [email protected].
About Hagens Berman
Hagens Berman is a global plaintiffs’ rights complex litigation firm focusing on corporate accountability. The firm is home to a robust practice and represents investors as well as whistleblowers, workers, consumers and others in cases achieving real results for those harmed by corporate negligence and other wrongdoings. Hagens Berman’s team has secured more than $2.9 billion in this area of law. More about the firm and its successes can be found at hbsslaw.com. Follow the firm for updates and news at @ClassActionLaw.
Attorney Advertising. Prior results do not guarantee a similar outcome in any future case.
Contact: Hagens Berman, Reed Kathrein, 715 Hearst Avenue, Suite 300, Berkeley, CA 94710, 844-916-0895, [email protected]
Faruqi & Faruqi, LLP Securities Litigation Partner James (Josh) Wilson Encourages Investors Who Suffered Losses In Regeneron To Contact Him Directly To Discuss Their Options
If you purchased or acquired securities in Regeneron between August 1, 2025 and May 15, 2026 and would like to discuss your legal rights, call Faruqi & Faruqi partner Josh Wilson directly at 877-247-4292 or 212-983-9330 (Ext. 1310).
[You may also click here for additional information]
New York, New York--(Newsfile Corp. - September 2, 2026) - Faruqi & Faruqi, LLP, a leading national securities law firm, is investigating potential claims against Regeneron Pharmaceuticals, Inc. ("Regeneron" or the "Company") (NASDAQ: REGN) and reminds investors of the September 14, 2026 deadline to seek the role of lead plaintiff in a federal securities class action that has been filed against the Company.
Faruqi & Faruqi is a leading national securities law firm with offices in New York, Pennsylvania, California and Georgia. The firm has recovered hundreds of millions of dollars for investors since its founding in 1995. See www.faruqilaw.com.
As detailed below, the complaint alleges that the Company and its executives violated federal securities laws by making false and/or misleading statements and/or failing to disclose the true state of Regeneron's Phase III Fianlimab-Libtayo Study; notably, that its preliminary statistical assumptions were fundamentally flawed, that the active treatment arm was failing to achieve meaningful clinical differentiation over standard therapies, and that the trial would ultimately fail to reach statistical significance on its primary endpoint even without overperformance of the control arm.
On April 29, 2026, Defendants disclosed that the Phase III Fianlimab-Libtayo Study had been altered, expanding the number of patients in the study eligible for "analysis of progression-free survival." On this news, Regeneron's stock price fell $45.41, or approximately 6.2%, to close at $686.36 per share on April 29, 2026.
On May 15, 2026, Regeneron issued a press release announcing that the "Phase 3 Trial of Fianlimab . . . did not reach statistical significance for the primary endpoint of improvement in progression-free survival (PFS)." On this news, Regeneron's stock price fell $68.57, or approximately 9.8%, to close at $629.68 per share on May 18, 2026.
The court-appointed lead plaintiff is the investor with the largest financial interest in the relief sought by the class who is adequate and typical of class members who directs and oversees the litigation on behalf of the putative class. Any member of the putative class may move the Court to serve as lead plaintiff through counsel of their choice, or may choose to do nothing and remain an absent class member. Your ability to share in any recovery is not affected by the decision to serve as a lead plaintiff or not.
Faruqi & Faruqi, LLP also encourages anyone with information regarding Regeneron's conduct to contact the firm, including whistleblowers, former employees, shareholders and others.
To learn more about the Regeneron class action, go to www.faruqilaw.com/REGN or call Faruqi & Faruqi partner Josh Wilson directly at 877-247-4292 or 212-983-9330 (Ext. 1310).
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Frequently Asked Questions (FAQ) for Investors Regarding the Regeneron Securities Class Action Lawsuit:
What is the Regeneron securities fraud lawsuit about?
Faruqi & Faruqi, LLP has filed a securities class action lawsuit against Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) on behalf of investors who purchased Regeneron securities during the Class Period. The lawsuit alleges that Regeneron and certain of its officers made materially false and misleading statements regarding the Phase III Fianlimab-Libtayo clinical study. Specifically, the complaint alleges that defendants concealed that the study's preliminary statistical assumptions were fundamentally flawed, that the active treatment arm was allegedly failing to achieve meaningful clinical differentiation over standard therapies, and that the trial would ultimately fail to reach statistical significance on its primary endpoint. The alleged fraud is said to have come to light through two disclosures: first, on April 29, 2026, when defendants announced an expansion of patients eligible for analysis of progression-free survival — causing Regeneron's stock to fall approximately 6.2% — and then on May 15, 2026, when Regeneron announced that the Phase III trial did not reach statistical significance for its primary endpoint, causing the stock to fall an additional approximately 9.8%.
Who may be eligible to participate in the lawsuit?
Investors who purchased or otherwise acquired Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) securities on the NASDAQ between August 1, 2025 and May 15, 2026, inclusive (the "Class Period"), may be eligible to participate in this lawsuit. Eligibility to participate is not limited to those who seek appointment as lead plaintiff; any investor who purchased Regeneron securities during the Class Period and suffered a loss may potentially share in any recovery obtained on behalf of the class. Investors are encouraged to review their trading records to determine whether their purchases fall within the Class Period. Participation in the litigation does not require investors to take any active litigation role beyond filing a timely claim if a recovery is ultimately achieved.
What is a lead plaintiff, and how can I seek appointment?
A lead plaintiff is a court-appointed representative who acts on behalf of all class members in directing the litigation, including working with counsel to make key strategic decisions regarding the case. Any investor who purchased Regeneron securities during the Class Period and suffered losses may move the court for appointment as lead plaintiff, but must do so no later than September 14, 2026, which is the court-established deadline for such motions. Courts generally appoint the movant with the largest financial interest in the relief sought who also satisfies the adequacy requirements of the applicable securities laws. Importantly, investors are not required to seek appointment as lead plaintiff in order to participate in or potentially share in any recovery that may result from this litigation. Those who do not seek lead plaintiff status may still submit a claim and may be eligible to receive a portion of any settlement or judgment obtained on behalf of the class.
What should investors do if they purchased Regeneron stock during the Class Period?
Investors who purchased Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) securities between August 1, 2025 and May 15, 2026 are encouraged to promptly review their brokerage and trading records to confirm the timing and size of their purchases and any resulting losses. Investors should take steps to preserve all relevant documentation, including trade confirmations, account statements, and any communications relating to their Regeneron holdings, as such records may be material to any future claim. Given that the lead plaintiff motion deadline is September 14, 2026, investors who wish to be considered for that role should act in advance of that date. Investors may wish to consult with Faruqi & Faruqi, LLP to better understand their legal rights and options before the deadline passes. Retaining counsel or seeking lead plaintiff status is not required to participate in any potential class recovery, but timely action is advisable to preserve all available options.
Why should investors contact Faruqi & Faruqi, LLP?
Faruqi & Faruqi, LLP has represented investors in securities litigation for decades and has recovered hundreds of millions of dollars for shareholders. Investors who purchased Regeneron securities during the Class Period may contact the firm to discuss their legal rights, potential claims, and the lead plaintiff process at no cost or obligation.
Attorney Advertising. The law firm responsible for this advertisement is Faruqi & Faruqi, LLP (www.faruqilaw.com). Prior results do not guarantee or predict a similar outcome with respect to any future matter. We welcome the opportunity to discuss your particular case. All communications will be treated in a confidential manner.
To view the source version of this press release, please visit https://www.newsfilecorp.com/release/312620
Source: Faruqi & Faruqi LLP
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NEW YORK, Sept. 02, 2026 (GLOBE NEWSWIRE) -- Bronstein, Gewirtz & Grossman, LLC, a nationally recognized investor-rights law firm, announces that a class action lawsuit has been filed against Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) and certain of its officers.
This lawsuit seeks to recover damages against Defendants for alleged violations of the federal securities laws on behalf of all persons and entities that purchased or otherwise acquired Regeneron securities between August 1, 2025 and May 15, 2026, both dates inclusive (the “Class Period”). Such investors are encouraged to join this case by visiting the firm’s site: bgandg.com/REGN.
Regeneron Case Details
The Complaint alleges that, throughout the Class Period, Defendants made materially false and/or misleading statements and/or failed to disclose that:
(1) the preliminary statistical assumptions underlying Regeneron’s Phase III Fianlimab-Libtayo study were fundamentally flawed;
(2) the study’s active treatment arm was not demonstrating meaningful clinical differentiation from standard therapies;
(3) the study was unlikely to achieve statistical significance with respect to its primary endpoint, even absent overperformance by the control arm; and
(4) as a result, the Company’s statements regarding the study’s design, progress, and prospects were materially false and/or misleading at all relevant times.
What's Next for Regeneron Investors?
A class action lawsuit has already been filed. If you wish to review a copy of the Complaint, you can visit the firm’s site: bgandg.com/REGN. or you may contact Peretz Bronstein, Esq. or his Client Relations Manager, Nathan Miller, of Bronstein, Gewirtz & Grossman, LLC at 917-590-0911. If you suffered a loss in Regeneron you have until September 14, 2026, to request that the Court appoint you as lead plaintiff. Your ability to share in any recovery doesn't require that you serve as lead plaintiff.
No Cost to Regeneron Investors
We, Bronstein, Gewirtz & Grossman LLC, represent investors in class actions on a contingency fee basis. That means we will ask the court to reimburse us for out-of-pocket expenses and attorneys’ fees, usually a percentage of the total recovery, only if we are successful.
Why Bronstein, Gewirtz & Grossman, LLC for Regeneron Securities Class Action?
Bronstein, Gewirtz & Grossman, LLC is a nationally recognized firm that represents investors in securities fraud class actions and shareholder derivative suits. Our firm has recovered hundreds of millions of dollars for investors nationwide. More at www.bgandg.com
"Our practice centers on restoring investor capital and ensuring corporate accountability, which serves to uphold the essential integrity of the marketplace," said Peretz Bronstein, Founding Partner of Bronstein, Gewirtz & Grossman, LLC.
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Contact Info
Peretz Bronstein, Esq. or Nathan Miller
Bronstein, Gewirtz & Grossman, LLC
917-590-0911 | [email protected]
Attorney advertising.
Prior results do not guarantee similar outcomes.
NEW YORK, Sept. 02, 2026 (GLOBE NEWSWIRE) -- Bernstein Liebhard LLP announces that a shareholder has filed a securities class action lawsuit on behalf of investors (the “Class”) who purchased or acquired the common stock of Regeneron Pharmaceuticals, Inc. (“Regeneron” or the “Company”) (NASDAQ: REGN) between August 1, 2025 and May 15, 2026, inclusive.
Should You Join The Regeneron Class Action Lawsuit:
Do you, or did you, own shares of Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN)?Did you purchase your shares between August 1, 2025 and May 15, 2026, inclusive?Did you lose money in your investment in Regeneron Pharmaceuticals, Inc.? What To Do Next:
Investors are encouraged to act promptly and submit a form at Regeneron Pharmaceuticals, Inc. Shareholder Class Action Lawsuit or contact Investor Relations Manager Peter Allocco at (212) 951-2030 or [email protected].
If you wish to serve as lead plaintiff for the Class, you must file papers by September 14, 2026. A lead plaintiff is a representative party acting on other class members’ behalf in directing the litigation. Your ability to share in any recovery doesn’t require that you serve as lead plaintiff. If you choose to take no action, you may remain an absent class member.
All representation is on a contingency fee basis. Shareholders pay no fees or expenses.
About The Lawsuit:
The lawsuit alleges that defendants made materially false and misleading statements and omissions regarding the Company’s business operations, growth prospects, and financial stability. As a result of these alleged misrepresentations, Regeneron common stock traded at artificially inflated prices during the Class Period. When the truth was disclosed, investors allegedly suffered significant losses.
About Bernstein Liebhard:
Since 1993, Bernstein Liebhard LLP has recovered over $3.5 billion for its clients. In addition to representing individual investors, the Firm has been retained by some of the largest public and private pension funds in the country to monitor their assets and pursue litigation on their behalf. As a result of its success litigating hundreds of class actions, the Firm has been named to The National Law Journal’s “Plaintiffs’ Hot List” thirteen times and listed in The Legal 500 for sixteen consecutive years.
Important Notice Regarding Alleged Phase III Fianlimab-Libtayo Clinical Trial Risk Misrepresentations. The lawsuit alleges Regeneron investors overpaid while the Company characterized slowing event accrual as potentially favorable, even as the study allegedly faced heightened risk of failing its primary endpoint.
, /PRNewswire/ -- Levi & Korsinsky, LLP notifies investors in Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) that a class action lawsuit has been filed on behalf of shareholders who purchased securities between August 1, 2025 and May 15, 2026. Find out if you could qualify to recover your losses. You may also contact Joseph E. Levi, Esq. at [email protected] or (212) 363-7500.
Regeneron shares declined approximately 13.95%, or $102.09 per share, from the Class Period high through the final disclosure-related decline. Applications to serve as lead plaintiff must be filed by September 14, 2026.
The Alleged Clinical Trial Risk Securities Fraud Methodology
According to the lawsuit, Regeneron provided investors with materially positive information about the Phase III Fianlimab-Libtayo Study while allegedly mischaracterizing the risk created by a prolonged slowdown in progression-free survival event accrual. The complaint alleges that investors were not told that preliminary statistical assumptions were flawed and that the trial was at increased risk of missing statistical significance.
The lawsuit contends that the Company framed the slowdown as consistent with durable efficacy in the active treatment arms, rather than as a warning sign that the study's statistical design and endpoint assumptions were under pressure.
How Event Accrual Allegedly Affected Investor Expectations
The Phase III Fianlimab-Libtayo Study tested a LAG-3 inhibitor combination as a first-line treatment for advanced melanoma. The complaint alleges that Regeneron's optimistic discussion of delayed event accrual caused investors to form expectations about the program that was not supported by the study's actual risk profile.
"This case presents important questions about clinical-trial risk disclosure obligations in the biotechnology sector, particularly where investors are told that delayed events may reflect durable treatment activity. The complaint alleges that shareholders were not given a fair picture of the study's statistical risks before the program missed its primary endpoint." -- Joseph E. Levi, Esq.
Key Clinical Trial Risk Allegations for Shareholders
The complaint alleges that the slowdown in event accrual was presented as potentially favorable to the active treatment arms. The lawsuit contends that the Phase III study's preliminary statistical assumptions were materially flawed. Plaintiffs allege that the active treatment arms were not demonstrating the clinical separation investors were led to expect. The action claims that the study's risk of failing its primary endpoint was understated during the Class Period. Regeneron later announced that the trial did not reach statistical significance for improvement in progression-free survival. Submit your information here or call (212) 363-7500.
Levi & Korsinsky, LLP | Top 50 Securities Firm | (212) 363-7500 | www.zlk.com
Frequently Asked Questions About the REGN Lawsuit
Q: What is the REGN class action lawsuit about? A: A securities class action has been filed against Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) alleging materially false and misleading statements between August 1, 2025 and May 15, 2026. Shares fell approximately 13.95% after the Company disclosed a protocol expansion for progression-free survival analysis and later announced that the Phase 3 Fianlimab trial did not reach statistical significance. Investors who purchased shares during the Class Period and suffered losses may be eligible to seek compensation.
Q: What specific misstatements does the REGN lawsuit allege? A: The complaint alleges Regeneron made materially false or misleading statements regarding the Phase III Fianlimab-Libtayo Study, including statements that allegedly minimized the clinical and statistical risk associated with slowing event accrual. When the protocol change and later trial failure were disclosed, the stock price declined sharply.
Q: What court was the REGN class action filed in? A: The case was filed in the United States District Court for the Southern District of New York, governed by the Private Securities Litigation Reform Act of 1995.
Q: What is a lead plaintiff and why does it matter? A: A lead plaintiff is the investor appointed by the court to represent the entire class. Lead plaintiffs are typically investors with the largest documented losses. Being appointed does not increase individual recovery but gives direct oversight of how the case is run.
Q: What happens after I contact Levi & Korsinsky? A: An attorney will review your trading history at no cost and provide an initial assessment of your potential eligibility.
Q: What if I already sold my REGN shares -- can I still recover losses? A: Yes. Eligibility is based on when you purchased, not whether you still hold the shares. Investors who bought during the Class Period and sold at a loss may still be eligible to participate.
Q: Do I need to go to court or give testimony? A: No. The overwhelming majority of class members never appear in court or give depositions. If there is a settlement or recovery, eligible class members generally submit a claim form to seek their portion.
CONTACT:
Levi & Korsinsky, LLP
Joseph E. Levi, Esq.
Ed Korsinsky, Esq.
33 Whitehall Street, 27th Floor
New York, NY 10004
[email protected]
Tel: (212) 363-7500
Fax: (212) 363-7171
Attorney Advertising. Prior results do not guarantee similar outcomes.
LOS ANGELES, Sept. 01, 2026 (GLOBE NEWSWIRE) -- The Portnoy Law Firm advises Regeneron Pharmaceuticals, Inc., (“Regeneron” or the "Company") (NASDAQ: REGN) investors of a class action on behalf of investors that bought securities between August 1, 2025 and May 15, 2026, inclusive (the “Class Period”). Regeneron investors have until September 14, 2026 to file a lead plaintiff motion.
Investors are encouraged to contact attorney Lesley F. Portnoy, by phone 310-692-8883 or email: [email protected], to discuss their legal rights, or join the case via https://portnoylaw.com/regeneron-pharmaceuticals-inc. The Portnoy Law Firm can provide a complimentary case evaluation and discuss investors’ options for pursuing claims to recover their losses.
The Regeneron class action lawsuit alleges that defendants throughout the Class Period made false and/or misleading statements and/or failed to disclose that: (i) defendants created the false impression that they possessed reliable information demonstrating that Regeneron’s Phase III Fianlimab-Libtayo Study was well-poised for success, while minimizing risks to the study’s odds of achieving its primary endpoint and its overall statistical validity arising from the prolonged event rate slowdown; (ii) Regeneron’s preliminary statistical assumptions were fundamentally flawed; (iii) the active treatment arm was failing to achieve meaningful clinical differentiation over standard therapies; and (iv) the trial would ultimately fail to reach statistical significance on its primary endpoint even without overperformance of the control arm.
On April 29, 2026, during Regeneron’s first quarter earnings call, defendants allegedly disclosed that the Phase III Fianlimab-Libtayo Study had been altered, expanding the number of patients in the study eligible for “analysis of progression-free survival.” On this news, the price of Regeneron stock declined more than 6%, according to the complaint.
Then, after-market on May 15, 2026, Regeneron issued a press release allegedly announcing that the “Phase 3 Trial of Fianlimab . . . did not reach statistical significance for the primary endpoint of improvement in progression-free survival (PFS).” On this news, the price of Regeneron stock dropped nearly 10%, according to the complaint.
The Portnoy Law Firm represents investors in pursuing claims caused by corporate wrongdoing. The Firm’s founding partner has recovered over $5.5 billion for aggrieved investors. Attorney advertising. Prior results do not guarantee similar outcomes.
Lesley F. Portnoy, Esq.
Admitted CA, NY and TX Bar [email protected]
310-692-8883
www.portnoylaw.com
NEW YORK, Sept. 01, 2026 (GLOBE NEWSWIRE) -- Pomerantz LLP announces that a class action lawsuit has been filed against Regeneron Pharmaceuticals, Inc. (“Regeneron” or the “Company”) (NASDAQ: REGN). Such investors are advised to contact Danielle Peyton at [email protected] or 646-581-9980, (or 888.4-POMLAW), toll-free, Ext. 7980. Those who inquire by e-mail are encouraged to include their mailing address, telephone number, and the number of shares purchased.
The class action concerns whether Regeneron and certain of its officers and/or directors have engaged in securities fraud or other unlawful business practices.
You have until September 14, 2026, to ask the Court to appoint you as Lead Plaintiff for the class if you purchased or otherwise acquired Regeneron securities during the Class Period. A copy of the Complaint can be obtained at www.pomerantzlaw.com.
[Click here for information about joining the class action]
On April 29, 2026, during during Regeneron’s first quarter earnings call, the Company disclosed that the Phase III Fianlimab-Libtayo Study had been altered, expanding the number of patients in the study eligible for “analysis of progression-free survival.”
On this news, Regeneron’s stock price fell $45.41 per share, or 6.21%, to close at $686.36 per share on April 29, 2026.
Then, on May 15, 2026, Regeneron issued a press release disclosing that the “Phase 3 Trial of Fianlimab . . . did not reach statistical significance for the primary endpoint of improvement in progression-free survival (PFS).”
On this news, Regeneron’s stock price fell $68.57 per share, or 9.82%, to close at $629.68 per share on May 16, 2026.
Pomerantz LLP, with offices in New York, Chicago, Los Angeles, London, Paris, and Tel Aviv, is acknowledged as one of the premier firms in the areas of corporate, securities, and antitrust class litigation. Founded by the late Abraham L. Pomerantz, known as the dean of the class action bar, Pomerantz pioneered the field of securities class actions. Today, more than 85 years later, Pomerantz continues in the tradition he established, fighting for the rights of the victims of securities fraud, breaches of fiduciary duty, and corporate misconduct. The Firm has recovered numerous multimillion-dollar damages awards on behalf of class members. See www.pomlaw.com.
Attorney advertising. Prior results do not guarantee similar outcomes.
, /PRNewswire/ -- Hagens Berman Sobol Shapiro LLP alerts investors in Regeneron Pharmaceuticals (NASDAQ: REGN) that a securities class action lawsuit has been filed after its surprising revelations concerning a Phase 3 clinical trial of a therapy intended to treat patients with melanoma.
The news that the trial failed drove the price of Regeneron shares sharply lower and, along with the severe market reaction ($11 billion market cap wipeout), triggered the lawsuit which seeks to represent investors who purchased or otherwise acquired shares of Regeneron common stock between August 1, 2025 and May 15, 2026.
National shareholder rights firm Hagens Berman is investigating the legal claims and urges Regeneron investors with substantial losses to submit your losses now. The firm also invites persons who may be able to assist in the investigation to contact its attorneys.
View our latest video summary of the allegations: youtu.be/rsW1-f8ARRs
Class Period: Aug. 1, 2025 – May 15, 2026
Lead Plaintiff Deadline: Sept. 14, 2026
Visit: www.hbsslaw.com/regn
Contact the Firm Now: [email protected]
844-916-0895
Regeneron Pharmaceuticals, Inc. (REGN) Securities Class Action:
The litigation is focused on the propriety of Regeneron's repeated optimism about the state of- (and changes to-) its Phase 3 trial of Fianlimab in combination with Libtayo as a first-line treatment for metastatic or locally advanced melanoma (the "Study").
The Study's primary endpoint was progression-free survival ("PFS") and Regeneron has characterized the combination as a "potential blockbuster." "Events" – disease progression or death – determined the timing and statistical power of the primary PFS analysis.
The complaint alleges that Regeneron made false and misleading statements while failing to disclose critical information to investors. In particular, the lawsuit accuses the company and its management of not informing investors that the Study's preliminary statistical assumptions were flawed, the active treatment arm was not achieving meaningful differentiation over standard therapies, and achievement of its primary endpoint was unlikely.
Throughout the Class Period, Regeneron and the other defendants assured investors of their confidence in the Trial's achieving its primary endpoint even when events were slowing down. At one point, management said the slowing event rates are "because the test arms are performing well."
The truth began to emerge on April 29, 2026, when Regeneron first revealed that it decided to alter the Trial protocol such that "t]he primary analysis of progression-free survival will now consider all patients enrolled in the study with a minimum follow-up of 6 months."
One prominent analyst reportedly questioned whether the decision was made because, in contrast to management's expressed confidence, the "underlying PFS benefit may be insufficient to show statistical significance."
Then, on May 12, 2026, Regeneron admitted that the decision to alter the Trial protocol was made in response to "slow event rates," occurred nearly six months ago, and was "submitted it to all the global regulatory authorities in November, December timeframe."
Three days later, the final blow came. On May 15, 2026, Regeneron abruptly reported the "trial did not reach statistical significance of the primary endpoint of improvement in progression-free survival (PFS)."
"We're focused on whether Regeneron altered the Trial protocol without timely telling investors to intentionally mislead them because the defendants knew so-called blockbuster potential for the combination wasn't really there," said Reed Kathrein, the Hagens Berman partner leading the firm's investigation of the pending claims in the suit.
If you invested in Regeneron and have substantial losses, or have knowledge that will assist the firm's investigation, submit your losses now »
If you'd like more information and answers to other frequently asked questions about the Regeneron case and the firm's investigation, read more »
Whistleblowers: Persons with non-public information regarding Regeneron should consider their options to help in the investigation or take advantage of the SEC Whistleblower program. Under the new program, whistleblowers who provide original information may receive rewards totaling up to 30 percent of any successful recovery made by the SEC. For more information, call Reed Kathrein at 844-916-0895 or email [email protected].
About Hagens Berman
Hagens Berman is a global plaintiffs' rights complex litigation firm focusing on corporate accountability. The firm is home to a robust practice and represents investors as well as whistleblowers, workers, consumers and others in cases achieving real results for those harmed by corporate negligence and other wrongdoings. Hagens Berman's team has secured more than $2.9 billion in this area of law. More about the firm and its successes can be found at hbsslaw.com. Follow the firm for updates and news at @ClassActionLaw.
Attorney Advertising. Prior results do not guarantee a similar outcome in any future case.
NEW YORK, Sept. 01, 2026 (GLOBE NEWSWIRE) -- SueWallSt alerts investors in Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) of a pending securities class action. Class Period: August 1, 2025 through May 15, 2026. Check if you might be eligible to recover your investment losses. You may also contact Joseph E. Levi, Esq. at [email protected] or (888) SueWallSt.
REGN shares declined from $731.77 on April 28, 2026 to $629.68 after the May 15, 2026 after-market disclosure, a $102.09 per-share decrease, or approximately 13.95%. The Court has set September 14, 2026 as the deadline to apply for lead plaintiff appointment.
"Investors deserve transparency about material risks that could affect their investments, especially where a pivotal oncology trial is approaching a readout after a protocol change. The allegations here focus on whether shareholders received sufficient information regarding clinical differentiation risk before REGN shares declined." -- Joseph E. Levi, Esq.
The lawsuit asserts that Regeneron and management presented the prolonged event accrual slowdown as consistent with favorable active-arm performance in the Phase III Fianlimab-Libtayo Study. As alleged, those statements allegedly minimized the risk that the active treatment arm was not separating meaningfully from standard therapies.
The action claims that investors were not adequately informed that the study's ability to reach statistical significance was under pressure and that a last-minute protocol amendment would expand the patient pool for progression-free survival analysis.
Management allegedly suggested that delayed event accrual could reflect durable responses in the active treatment arms.The complaint alleges the active treatment arm failed to achieve meaningful clinical differentiation over standard therapies.Regeneron later disclosed that the PFS analysis would consider all enrolled patients with at least six months of follow-up.The May 15, 2026 announcement stated that the Phase 3 Trial of Fianlimab did not reach statistical significance for improvement in PFS.Plaintiffs contend the protocol amendment and failed primary endpoint undermined prior positive representations about the study's risk profile. Why Differentiation Adequacy Allegedly Mattered to Investors
Fianlimab-Libtayo was positioned as a potentially important first-line advanced melanoma program. As alleged, investors relied on Regeneron’s representations concerning the potential for the Fianlimab-Libtayo combination to demonstrate clinically meaningful improvement over pembrolizumab and other standards of care.
The action claims the market reacted sharply when information concerning the Phase III study’s protocol changes and subsequent failure to meet the primary PFS endpoint.
The action claims the market reacted sharply when the alleged differentiation risk materialized through the protocol change and subsequent failure to meet the primary PFS endpoint.
Learn more about the case or call (888) SueWallSt.
WHY SUEWALLST: SueWallSt is powered by Levi & Korsinsky LLP. Levi & Korsinsky LLP has established itself as a nationally-recognized securities litigation firm that has secured hundreds of millions of dollars for aggrieved shareholders and built a track record of winning high-stakes cases. The firm has extensive expertise representing investors in complex securities litigation and a team of over 70 employees to serve our clients. For seven years in a row, Levi & Korsinsky has ranked in ISS Securities Class Action Services' Top 50 Report as one of the top securities litigation firms in the United States.
Frequently Asked Questions About the REGN Lawsuit
Q: What specific misstatements does the REGN lawsuit allege? A: The complaint alleges Regeneron Pharmaceuticals, Inc. made materially false or misleading statements regarding the Phase III Fianlimab-Libtayo Study, including statements that allegedly suggested slowing event accrual reflected active-arm performance while omitting clinical differentiation risks and the need for a protocol amendment.
Q: When did Regeneron allegedly mislead investors? A: The Class Period runs from August 1, 2025 to May 15, 2026. The complaint alleges that corrective disclosures on April 29, 2026 and May 15, 2026 revealed information that caused significant stock declines.
Q: What court was the REGN class action filed in? A: The case was filed in the United States District Court for the Southern District of New York and is governed by the Private Securities Litigation Reform Act of 1995.
Q: What is a lead plaintiff and why does it matter? A: A lead plaintiff is the investor appointed by the court to represent the entire class. Lead plaintiffs are typically investors with the largest documented losses. Being appointed does not increase individual recovery but gives direct oversight of how the case is run.
Q: What happens after I contact Levi & Korsinsky? A: An attorney will review your trading history at no cost and provide an initial assessment of your potential eligibility.
Q: What if I already sold my REGN shares, can I still recover losses? A: Yes. Eligibility is based on when you purchased, not whether you still hold the shares. Investors who bought during the Class Period and sold at a loss may still be eligible to participate.
Q: Do I need to go to court or give testimony? A: No. The overwhelming majority of class members never appear in court or give depositions. If there is a settlement or recovery, eligible class members generally submit a claim form to seek their portion.
Q: What does it cost me to participate? A: There is no upfront cost to contact the firm. Securities class actions are generally handled on a pure contingency basis. No upfront fees, no retainer, and no out-of-pocket costs. Any attorneys' fees and expenses awarded to class counsel are subject to court approval.
Faruqi & Faruqi, LLP Securities Litigation Partner James (Josh) Wilson Encourages Investors Who Suffered Losses In Regeneron To Contact Him Directly To Discuss Their Options
If you purchased or acquired securities in Regeneron between August 1, 2025 and May 15, 2026 and would like to discuss your legal rights, call Faruqi & Faruqi partner Josh Wilson directly at 877-247-4292 or 212-983-9330 (Ext. 1310).
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New York, New York--(Newsfile Corp. - August 31, 2026) - Faruqi & Faruqi, LLP, a leading national securities law firm, is investigating potential claims against Regeneron Pharmaceuticals, Inc. ("Regeneron" or the "Company") (NASDAQ: REGN) and reminds investors of the September 14, 2026 deadline to seek the role of lead plaintiff in a federal securities class action that has been filed against the Company.
Faruqi & Faruqi is a leading national securities law firm with offices in New York, Pennsylvania, California and Georgia. The firm has recovered hundreds of millions of dollars for investors since its founding in 1995. See www.faruqilaw.com.
As detailed below, the complaint alleges that the Company and its executives violated federal securities laws by making false and/or misleading statements and/or failing to disclose the true state of Regeneron's Phase III Fianlimab-Libtayo Study; notably, that its preliminary statistical assumptions were fundamentally flawed, that the active treatment arm was failing to achieve meaningful clinical differentiation over standard therapies, and that the trial would ultimately fail to reach statistical significance on its primary endpoint even without overperformance of the control arm.
On April 29, 2026, Defendants disclosed that the Phase III Fianlimab-Libtayo Study had been altered, expanding the number of patients in the study eligible for "analysis of progression-free survival." On this news, Regeneron's stock price fell $45.41, or approximately 6.2%, to close at $686.36 per share on April 29, 2026.
On May 15, 2026, Regeneron issued a press release announcing that the "Phase 3 Trial of Fianlimab . . . did not reach statistical significance for the primary endpoint of improvement in progression-free survival (PFS)." On this news, Regeneron's stock price fell $68.57, or approximately 9.8%, to close at $629.68 per share on May 18, 2026.
The court-appointed lead plaintiff is the investor with the largest financial interest in the relief sought by the class who is adequate and typical of class members who directs and oversees the litigation on behalf of the putative class. Any member of the putative class may move the Court to serve as lead plaintiff through counsel of their choice, or may choose to do nothing and remain an absent class member. Your ability to share in any recovery is not affected by the decision to serve as a lead plaintiff or not.
Faruqi & Faruqi, LLP also encourages anyone with information regarding Regeneron's conduct to contact the firm, including whistleblowers, former employees, shareholders and others.
To learn more about the Regeneron class action, go to www.faruqilaw.com/REGN or call Faruqi & Faruqi partner Josh Wilson directly at 877-247-4292 or 212-983-9330 (Ext. 1310).
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Frequently Asked Questions (FAQ) for Investors Regarding the Regeneron Securities Class Action Lawsuit:
What is the Regeneron securities fraud lawsuit about?
Faruqi & Faruqi, LLP has filed a securities class action lawsuit against Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) on behalf of investors who purchased Regeneron securities during the Class Period. The lawsuit alleges that Regeneron and certain of its officers made materially false and misleading statements regarding the Phase III Fianlimab-Libtayo clinical study. Specifically, the complaint alleges that defendants concealed that the study's preliminary statistical assumptions were fundamentally flawed, that the active treatment arm was allegedly failing to achieve meaningful clinical differentiation over standard therapies, and that the trial would ultimately fail to reach statistical significance on its primary endpoint. The alleged fraud is said to have come to light through two disclosures: first, on April 29, 2026, when defendants announced an expansion of patients eligible for analysis of progression-free survival - causing Regeneron's stock to fall approximately 6.2% - and then on May 15, 2026, when Regeneron announced that the Phase III trial did not reach statistical significance for its primary endpoint, causing the stock to fall an additional approximately 9.8%.
Who may be eligible to participate in the lawsuit?
Investors who purchased or otherwise acquired Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) securities on the NASDAQ between August 1, 2025 and May 15, 2026, inclusive (the "Class Period"), may be eligible to participate in this lawsuit. Eligibility to participate is not limited to those who seek appointment as lead plaintiff; any investor who purchased Regeneron securities during the Class Period and suffered a loss may potentially share in any recovery obtained on behalf of the class. Investors are encouraged to review their trading records to determine whether their purchases fall within the Class Period. Participation in the litigation does not require investors to take any active litigation role beyond filing a timely claim if a recovery is ultimately achieved.
What is a lead plaintiff, and how can I seek appointment?
A lead plaintiff is a court-appointed representative who acts on behalf of all class members in directing the litigation, including working with counsel to make key strategic decisions regarding the case. Any investor who purchased Regeneron securities during the Class Period and suffered losses may move the court for appointment as lead plaintiff, but must do so no later than September 14, 2026, which is the court-established deadline for such motions. Courts generally appoint the movant with the largest financial interest in the relief sought who also satisfies the adequacy requirements of the applicable securities laws. Importantly, investors are not required to seek appointment as lead plaintiff in order to participate in or potentially share in any recovery that may result from this litigation. Those who do not seek lead plaintiff status may still submit a claim and may be eligible to receive a portion of any settlement or judgment obtained on behalf of the class.
What should investors do if they purchased Regeneron stock during the Class Period?
Investors who purchased Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) securities between August 1, 2025 and May 15, 2026 are encouraged to promptly review their brokerage and trading records to confirm the timing and size of their purchases and any resulting losses. Investors should take steps to preserve all relevant documentation, including trade confirmations, account statements, and any communications relating to their Regeneron holdings, as such records may be material to any future claim. Given that the lead plaintiff motion deadline is September 14, 2026, investors who wish to be considered for that role should act in advance of that date. Investors may wish to consult with Faruqi & Faruqi, LLP to better understand their legal rights and options before the deadline passes. Retaining counsel or seeking lead plaintiff status is not required to participate in any potential class recovery, but timely action is advisable to preserve all available options.
Why should investors contact Faruqi & Faruqi, LLP?
Faruqi & Faruqi, LLP has represented investors in securities litigation for decades and has recovered hundreds of millions of dollars for shareholders. Investors who purchased Regeneron securities during the Class Period may contact the firm to discuss their legal rights, potential claims, and the lead plaintiff process at no cost or obligation.
Attorney Advertising. The law firm responsible for this advertisement is Faruqi & Faruqi, LLP (www.faruqilaw.com). Prior results do not guarantee or predict a similar outcome with respect to any future matter. We welcome the opportunity to discuss your particular case. All communications will be treated in a confidential manner.
To view the source version of this press release, please visit https://www.newsfilecorp.com/release/312196
Source: Faruqi & Faruqi LLP
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Corient Private Wealth LP cut its stake in shares of Regeneron Pharmaceuticals, Inc. (NASDAQ:REGN – Free Report) by 23.9% in the second quarter, according to the company in its most recent filing with the Securities and Exchange Commission. The firm owned 13,758 shares of the biopharmaceutical company’s stock after selling 4,315 shares during the quarter. Corient Private Wealth LP’s holdings in Regeneron Pharmaceuticals were worth $8,579,000 at the end of the most recent reporting period.
Several other hedge funds also recently bought and sold shares of the company. BlackRock Inc. purchased a new position in shares of Regeneron Pharmaceuticals in the second quarter valued at about $5,682,636,000. Dodge & Cox raised its position in shares of Regeneron Pharmaceuticals by 1.0% during the fourth quarter. Dodge & Cox now owns 4,596,358 shares of the biopharmaceutical company’s stock valued at $3,547,791,000 after buying an additional 45,513 shares during the last quarter. Franklin Resources Inc. grew its stake in Regeneron Pharmaceuticals by 4.4% during the fourth quarter. Franklin Resources Inc. now owns 2,560,004 shares of the biopharmaceutical company’s stock valued at $1,975,990,000 after acquiring an additional 106,861 shares in the last quarter. Nuveen LLC increased its holdings in shares of Regeneron Pharmaceuticals by 71.1% in the fourth quarter. Nuveen LLC now owns 2,010,517 shares of the biopharmaceutical company’s stock worth $1,551,858,000 after purchasing an additional 835,240 shares during the last quarter. Finally, Price T Rowe Associates Inc. MD increased its stake in Regeneron Pharmaceuticals by 142.2% in the 4th quarter. Price T Rowe Associates Inc. MD now owns 1,949,797 shares of the biopharmaceutical company’s stock worth $1,504,991,000 after acquiring an additional 1,144,887 shares during the last quarter. Institutional investors own 83.31% of the company’s stock.
Analysts Set New Price Targets Several equities research analysts have weighed in on REGN shares. Sanford C. Bernstein raised Regeneron Pharmaceuticals to a “hold” rating in a research note on Wednesday, July 29th. Royal Bank Of Canada boosted their price objective on Regeneron Pharmaceuticals from $696.00 to $737.00 and gave the company a “sector perform” rating in a report on Friday, July 31st. Truist Financial upped their price objective on Regeneron Pharmaceuticals from $769.00 to $772.00 and gave the company a “buy” rating in a research report on Friday, July 31st. HSBC reduced their target price on Regeneron Pharmaceuticals from $990.00 to $880.00 and set a “buy” rating on the stock in a research note on Monday, July 6th. Finally, Weiss Ratings reiterated a “hold (c)” rating on shares of Regeneron Pharmaceuticals in a research report on Wednesday, June 24th. Fifteen research analysts have rated the stock with a Buy rating and ten have given a Hold rating to the company’s stock. Based on data from MarketBeat.com, Regeneron Pharmaceuticals currently has an average rating of “Moderate Buy” and a consensus price target of $800.36.
Read Our Latest Stock Analysis on Regeneron Pharmaceuticals Trending Headlines about Regeneron Pharmaceuticals Here are the key news stories impacting Regeneron Pharmaceuticals this week:
Positive Sentiment: The FDA approved Pasatru (garetosmab) for adults with fibrodysplasia ossificans progressiva, an ultra-rare genetic disorder that causes abnormal bone growth. In a 56-week Phase 3 trial, the approved dose reduced disease-related bone formation, giving Regeneron a new commercial opportunity and strengthening its rare-disease pipeline. However, the small patient population likely limits the drug’s near-term earnings contribution. Can Regeneron’s Rare-Disease Win Move the Earnings Needle? Neutral Sentiment: An investor letter highlighted Regeneron’s response to mixed results from its melanoma drug trials, including adjustments to its development strategy. The update offers limited new information but underscores the importance of replacing potential value lost from the failed program. Regeneron Adjusts Course Amid Mixed Results in Melanoma Drug Trials Negative Sentiment: Several law firms announced or promoted a securities-fraud class action related to disclosures surrounding Regeneron’s failed Phase 3 melanoma trial. The failure reportedly erased approximately $11 billion in market capitalization and prompted allegations that investors were misled about the program. The repeated notices, all citing a September 14, 2026 lead-plaintiff deadline, add reputational and potential litigation-cost risks, although they do not represent a finding of wrongdoing. Regeneron Securities Fraud Class Action Filed Faruqi Shareholder Notice Insider Activity at Regeneron Pharmaceuticals In other news, Director Arthur F. Ryan sold 200 shares of the business’s stock in a transaction dated Thursday, July 2nd. The stock was sold at an average price of $650.15, for a total value of $130,030.00. Following the completion of the transaction, the director owned 17,303 shares of the company’s stock, valued at $11,249,545.45. The trade was a 1.14% decrease in their position. The sale was disclosed in a filing with the SEC, which is available through the SEC website. The transaction was executed under a pre-arranged Rule 10b5-1 trading plan. Also, Director Kathryn Guarini sold 400 shares of the business’s stock in a transaction on Monday, August 10th. The shares were sold at an average price of $800.00, for a total transaction of $320,000.00. Following the completion of the transaction, the director owned 603 shares of the company’s stock, valued at approximately $482,400. This represents a 39.88% decrease in their ownership of the stock. The disclosure for this sale is available in the SEC filing. The transaction was executed under a pre-arranged Rule 10b5-1 trading plan. Insiders have sold a total of 1,400 shares of company stock valued at $1,090,030 in the last ninety days. Company insiders own 6.97% of the company’s stock.
Regeneron Pharmaceuticals Price Performance NASDAQ:REGN opened at $794.19 on Monday. The company has a debt-to-equity ratio of 0.06, a current ratio of 3.34 and a quick ratio of 2.78. The company has a 50-day moving average of $717.52 and a 200 day moving average of $717.95. Regeneron Pharmaceuticals, Inc. has a 1-year low of $541.00 and a 1-year high of $847.00. The firm has a market cap of $81.77 billion, a PE ratio of 19.63, a price-to-earnings-growth ratio of 1.35 and a beta of 0.22.
Regeneron Pharmaceuticals (NASDAQ:REGN – Get Free Report) last issued its quarterly earnings data on Thursday, July 30th. The biopharmaceutical company reported $14.29 earnings per share for the quarter, beating analysts’ consensus estimates of $10.16 by $4.13. The company had revenue of $4.29 billion for the quarter, compared to the consensus estimate of $3.82 billion. Regeneron Pharmaceuticals had a return on equity of 13.47% and a net margin of 27.86%.The firm’s revenue for the quarter was up 16.7% compared to the same quarter last year. During the same quarter last year, the company earned $12.81 earnings per share. As a group, research analysts anticipate that Regeneron Pharmaceuticals, Inc. will post 44.25 EPS for the current fiscal year.
Regeneron Pharmaceuticals Dividend Announcement The business also recently disclosed a quarterly dividend, which will be paid on Monday, August 31st. Stockholders of record on Tuesday, August 18th will be issued a dividend of $0.94 per share. The ex-dividend date of this dividend is Tuesday, August 18th. This represents a $3.76 dividend on an annualized basis and a dividend yield of 0.5%. Regeneron Pharmaceuticals’s payout ratio is 9.29%.
Regeneron Pharmaceuticals Company Profile (Free Report)
Regeneron Pharmaceuticals, Inc (NASDAQ: REGN) is a U.S.-based biotechnology company founded in 1988 and headquartered in Tarrytown, New York. It focuses on discovering, developing, manufacturing and commercializing medicines for serious medical conditions. The company combines laboratory research, clinical development and in-house manufacturing to advance a pipeline of biologic therapies across multiple therapeutic areas.
Regeneron is known for its proprietary drug discovery technologies, including its VelocImmune platform, which is used to generate fully human monoclonal antibodies.
Featured Articles Five stocks we like better than Regeneron Pharmaceuticals Strike a Balance Between Growth and Stability With These 3 Names Ready to Rally Rubrik’s AI Security Bet Could Power the Next Leg Higher Apple’s Foldable iPhone Could Be a Catalyst, But Not a Cure-All Snowflake Is Up Nearly 50% in 2026—What Are Short Sellers Betting Against?
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Corient Private Wealth LP acquired a new position in shares of Regeneron Pharmaceuticals, Inc. (NASDAQ:REGN – Free Report) in the second quarter, according to its most recent 13F filing with the Securities and Exchange Commission. The institutional investor acquired 14,670 shares of the biopharmaceutical company’s stock, valued at approximately $9,148,000.
Other large investors also recently modified their holdings of the company. Bank of America Corp DE lifted its stake in Regeneron Pharmaceuticals by 8.5% in the second quarter. Bank of America Corp DE now owns 1,291,053 shares of the biopharmaceutical company’s stock valued at $805,023,000 after acquiring an additional 101,469 shares during the last quarter. Caisse de depot et placement du Quebec acquired a new position in shares of Regeneron Pharmaceuticals during the 2nd quarter worth about $156,264,000. Pointe Capital Management LLC acquired a new position in shares of Regeneron Pharmaceuticals during the 2nd quarter worth about $472,000. Man Group plc bought a new stake in shares of Regeneron Pharmaceuticals in the 2nd quarter valued at about $272,460,000. Finally, Jupiter Topco LLC bought a new stake in shares of Regeneron Pharmaceuticals in the 2nd quarter valued at about $90,310,000. 83.31% of the stock is currently owned by institutional investors and hedge funds.
Key Stories Impacting Regeneron Pharmaceuticals Here are the key news stories impacting Regeneron Pharmaceuticals this week:
Positive Sentiment: The FDA approved Pasatru (garetosmab) for adults with fibrodysplasia ossificans progressiva, an ultra-rare genetic disorder that causes abnormal bone growth. In a 56-week Phase 3 trial, the approved dose reduced disease-related bone formation, giving Regeneron a new commercial opportunity and strengthening its rare-disease pipeline. However, the small patient population likely limits the drug’s near-term earnings contribution. Can Regeneron’s Rare-Disease Win Move the Earnings Needle? Neutral Sentiment: An investor letter highlighted Regeneron’s response to mixed results from its melanoma drug trials, including adjustments to its development strategy. The update offers limited new information but underscores the importance of replacing potential value lost from the failed program. Regeneron Adjusts Course Amid Mixed Results in Melanoma Drug Trials Negative Sentiment: Several law firms announced or promoted a securities-fraud class action related to disclosures surrounding Regeneron’s failed Phase 3 melanoma trial. The failure reportedly erased approximately $11 billion in market capitalization and prompted allegations that investors were misled about the program. The repeated notices, all citing a September 14, 2026 lead-plaintiff deadline, add reputational and potential litigation-cost risks, although they do not represent a finding of wrongdoing. Regeneron Securities Fraud Class Action Filed Faruqi Shareholder Notice Regeneron Pharmaceuticals Price Performance Shares of REGN opened at $794.19 on Monday. The firm has a 50 day simple moving average of $717.52 and a two-hundred day simple moving average of $717.95. The company has a debt-to-equity ratio of 0.06, a current ratio of 3.34 and a quick ratio of 2.78. Regeneron Pharmaceuticals, Inc. has a one year low of $541.00 and a one year high of $847.00. The company has a market cap of $81.77 billion, a P/E ratio of 19.63, a P/E/G ratio of 1.35 and a beta of 0.22. Regeneron Pharmaceuticals (NASDAQ:REGN – Get Free Report) last issued its quarterly earnings results on Thursday, July 30th. The biopharmaceutical company reported $14.29 earnings per share (EPS) for the quarter, beating the consensus estimate of $10.16 by $4.13. Regeneron Pharmaceuticals had a return on equity of 13.47% and a net margin of 27.86%.The company had revenue of $4.29 billion for the quarter, compared to analyst estimates of $3.82 billion. During the same quarter last year, the company posted $12.81 EPS. The company’s revenue for the quarter was up 16.7% compared to the same quarter last year. Research analysts forecast that Regeneron Pharmaceuticals, Inc. will post 44.25 EPS for the current fiscal year.
Regeneron Pharmaceuticals Announces Dividend The firm also recently announced a quarterly dividend, which will be paid on Monday, August 31st. Shareholders of record on Tuesday, August 18th will be given a $0.94 dividend. This represents a $3.76 dividend on an annualized basis and a yield of 0.5%. The ex-dividend date is Tuesday, August 18th. Regeneron Pharmaceuticals’s payout ratio is currently 9.29%.
Insider Buying and Selling at Regeneron Pharmaceuticals In other Regeneron Pharmaceuticals news, Director Huda Y. Zoghbi sold 800 shares of the business’s stock in a transaction dated Monday, August 10th. The stock was sold at an average price of $800.00, for a total transaction of $640,000.00. Following the completion of the transaction, the director owned 1,703 shares of the company’s stock, valued at approximately $1,362,400. The trade was a 31.96% decrease in their ownership of the stock. The sale was disclosed in a legal filing with the Securities & Exchange Commission, which can be accessed through the SEC website. The transaction was executed under a pre-arranged Rule 10b5-1 trading plan. Also, Director Kathryn Guarini sold 400 shares of the stock in a transaction dated Monday, August 10th. The stock was sold at an average price of $800.00, for a total transaction of $320,000.00. Following the completion of the transaction, the director directly owned 603 shares of the company’s stock, valued at $482,400. This trade represents a 39.88% decrease in their position. The SEC filing for this sale provides additional information. The transaction was executed under a pre-arranged Rule 10b5-1 trading plan. Insiders have sold a total of 1,400 shares of company stock worth $1,090,030 over the last 90 days. Insiders own 6.97% of the company’s stock.
Analysts Set New Price Targets A number of research firms recently weighed in on REGN. Royal Bank Of Canada boosted their target price on Regeneron Pharmaceuticals from $696.00 to $737.00 and gave the stock a “sector perform” rating in a report on Friday, July 31st. Cantor Fitzgerald raised their price target on Regeneron Pharmaceuticals from $750.00 to $795.00 and gave the company an “overweight” rating in a report on Friday, July 31st. JPMorgan Chase & Co. reduced their price objective on shares of Regeneron Pharmaceuticals from $950.00 to $850.00 and set an “overweight” rating for the company in a research report on Monday, May 18th. BMO Capital Markets decreased their price objective on shares of Regeneron Pharmaceuticals from $900.00 to $730.00 and set an “outperform” rating on the stock in a report on Monday, May 18th. Finally, Wall Street Zen raised shares of Regeneron Pharmaceuticals from a “buy” rating to a “strong-buy” rating in a research report on Saturday, August 15th. Fifteen analysts have rated the stock with a Buy rating and ten have given a Hold rating to the stock. According to MarketBeat.com, the company presently has a consensus rating of “Moderate Buy” and an average price target of $800.36.
Get Our Latest Stock Report on Regeneron Pharmaceuticals
(Free Report)
Regeneron Pharmaceuticals, Inc (NASDAQ: REGN) is a U.S.-based biotechnology company founded in 1988 and headquartered in Tarrytown, New York. It focuses on discovering, developing, manufacturing and commercializing medicines for serious medical conditions. The company combines laboratory research, clinical development and in-house manufacturing to advance a pipeline of biologic therapies across multiple therapeutic areas.
Regeneron is known for its proprietary drug discovery technologies, including its VelocImmune platform, which is used to generate fully human monoclonal antibodies.
Further Reading Five stocks we like better than Regeneron Pharmaceuticals Strike a Balance Between Growth and Stability With These 3 Names Ready to Rally Rubrik’s AI Security Bet Could Power the Next Leg Higher Apple’s Foldable iPhone Could Be a Catalyst, But Not a Cure-All Snowflake Is Up Nearly 50% in 2026—What Are Short Sellers Betting Against?
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SAN FRANCISCO, Aug. 31, 2026 (GLOBE NEWSWIRE) -- Hagens Berman Sobol Shapiro LLP alerts investors in Regeneron Pharmaceuticals (NASDAQ: REGN) that a securities class action lawsuit has been filed after its surprising revelations concerning a Phase 3 clinical trial of a therapy intended to treat patients with melanoma.
The news that the trial failed drove the price of Regeneron shares sharply lower and, along with the severe market reaction ($11 billion market cap wipeout), triggered the lawsuit which seeks to represent investors who purchased or otherwise acquired shares of Regeneron common stock between August 1, 2025 and May 15, 2026.
National shareholder rights firm Hagens Berman is investigating the legal claims and urges Regeneron investors with substantial losses to submit your losses now. The firm also invites persons who may be able to assist in the investigation to contact its attorneys.
View our latest video summary of the allegations: youtu.be/rsW1-f8ARRs
Class Period: Aug. 1, 2025 – May 15, 2026
Lead Plaintiff Deadline: Sept. 14, 2026
Visit: www.hbsslaw.com/regn
Contact the Firm Now: [email protected]
844-916-0895
Regeneron Pharmaceuticals, Inc. (REGN) Securities Class Action:
The litigation is focused on the propriety of Regeneron’s repeated optimism about the state of- (and changes to-) its Phase 3 trial of Fianlimab in combination with Libtayo as a first-line treatment for metastatic or locally advanced melanoma (the “Study”).
The Study’s primary endpoint was progression-free survival (“PFS”) and Regeneron has characterized the combination as a “potential blockbuster.” “Events” – disease progression or death – determined the timing and statistical power of the primary PFS analysis.
The complaint alleges that Regeneron made false and misleading statements while failing to disclose critical information to investors. In particular, the lawsuit accuses the company and its management of not informing investors that the Study’s preliminary statistical assumptions were flawed, the active treatment arm was not achieving meaningful differentiation over standard therapies, and achievement of its primary endpoint was unlikely.
Throughout the Class Period, Regeneron and the other defendants assured investors of their confidence in the Trial’s achieving its primary endpoint even when events were slowing down. At one point, management said the slowing event rates are “because the test arms are performing well.”
The truth began to emerge on April 29, 2026, when Regeneron first revealed that it decided to alter the Trial protocol such that “t]he primary analysis of progression-free survival will now consider all patients enrolled in the study with a minimum follow-up of 6 months.”
One prominent analyst reportedly questioned whether the decision was made because, in contrast to management’s expressed confidence, the “underlying PFS benefit may be insufficient to show statistical significance.”
Then, on May 12, 2026, Regeneron admitted that the decision to alter the Trial protocol was made in response to “slow event rates,” occurred nearly six months ago, and was “submitted it to all the global regulatory authorities in November, December timeframe.”
Three days later, the final blow came. On May 15, 2026, Regeneron abruptly reported the “trial did not reach statistical significance of the primary endpoint of improvement in progression-free survival (PFS).”
“We’re focused on whether Regeneron altered the Trial protocol without timely telling investors to intentionally mislead them because the defendants knew so-called blockbuster potential for the combination wasn’t really there,” said Reed Kathrein, the Hagens Berman partner leading the firm’s investigation of the pending claims in the suit.
If you invested in Regeneron and have substantial losses, or have knowledge that will assist the firm’s investigation, submit your losses now »
If you’d like more information and answers to other frequently asked questions about the Regeneron case and the firm’s investigation, read more »
Whistleblowers: Persons with non-public information regarding Regeneron should consider their options to help in the investigation or take advantage of the SEC Whistleblower program. Under the new program, whistleblowers who provide original information may receive rewards totaling up to 30 percent of any successful recovery made by the SEC. For more information, call Reed Kathrein at 844-916-0895 or email [email protected].
About Hagens Berman
Hagens Berman is a global plaintiffs’ rights complex litigation firm focusing on corporate accountability. The firm is home to a robust practice and represents investors as well as whistleblowers, workers, consumers and others in cases achieving real results for those harmed by corporate negligence and other wrongdoings. Hagens Berman’s team has secured more than $2.9 billion in this area of law. More about the firm and its successes can be found at hbsslaw.com. Follow the firm for updates and news at @ClassActionLaw.
Attorney Advertising. Prior results do not guarantee a similar outcome in any future case.
Contact: Hagens Berman, Reed Kathrein, 715 Hearst Avenue, Suite 300, Berkeley, CA 94710, 844-916-0895, [email protected]
Regeneron (REGN) Securities Class Action Filed - Sept 14, 2026 Lead Plaintiff Deadline - Act Now A securities fraud #classactionlawsuit has been filed against #Regeneron (#REGN), and investors are...
LOS ANGELES, Aug. 31, 2026 (GLOBE NEWSWIRE) -- Schall, Brown & Schwartz LLP (“SBS”), a national shareholder rights litigation firm, reminds investors of a class action lawsuit against Regeneron Pharmaceuticals, Inc. (“Regeneron” or “the Company”) (NASDAQ: REGN) for violations of §§10(b) and 20(a) of the Securities Exchange Act of 1934 and Rule 10b-5 promulgated thereunder by the U.S. Securities and Exchange Commission.
Shareholders who purchased shares of REGN during the class period listed are encouraged to contact the firm regarding possible lead plaintiff appointments. Appointment as lead plaintiff is not required to partake in any recovery.
CLASS PERIOD: August 1, 2025 to May 15, 2026
DEADLINE: September 14, 2026
If you are a shareholder who suffered a loss, click here to participate.
CASE DETAILS: According to the Complaint, the Company made false and misleading statements to the market. Regeneron led investors to believe that its Phase III Fianlimab-Libtayo Study was likely to succeed by achieving its primary endpoint. The Company utilized flawed statistical assumptions. In fact, the Company failed to demonstrate clinical differentiation from other therapies. Based on these facts, the Company’s public statements were false and materially misleading throughout the class period. When the market learned the truth about Regeneron, investors suffered damages.
We also encourage you to contact Brian Schall or David Schwartz of Schall, Brown & Schwartz LLP, 2049 Century Park East, Suite 2460, Los Angeles, CA 90067, at 310-301-3335, to discuss your rights free of charge. You can also reach us through the firm's website at www.schallfirm.com, or by email at [email protected].
The class, in this case, has not yet been certified, and until certification occurs, you are not represented by an attorney. If you choose to take no action, you can remain an absent class member.
Join the case to recover your losses
WHY SBS? Schall, Brown & Schwartz LLP represents investors around the world and specializes in securities class action lawsuits and shareholder rights litigation. Bringing together the extensive experience and diverse skillsets of founding partners Brian Schall, Andrew Brown, and David Schwartz, SBS is dedicated to aggressively advocating for every investor.
This press release may be considered Attorney Advertising in some jurisdictions under the applicable law and rules of ethics.
CONTACT:
Schall, Brown & Schwartz LLP
Brian Schall, Esq.,
Andrew Brown, Esq.,
David Schwartz, Esq.,
www.schallfirm.com
Office: 310-301-3335 [email protected]
NEW YORK, Aug. 31, 2026 (GLOBE NEWSWIRE) -- Levi & Korsinsky, LLP notifies investors in Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) that a class action has been filed on behalf of shareholders who purchased securities between August 1, 2025 and May 15, 2026. See if you could be eligible to recover. You may also contact Joseph E. Levi, Esq. at [email protected] or (212) 363-7500.
REGN declined from $731.77 on April 28, 2026 to $629.68 on May 18, 2026, a decline of $102.09 per share, or approximately 13.95%. Investors have until September 14, 2026 to seek lead plaintiff status.
Chronology of Alleged Trial Disclosure Events
The filing states that Regeneron repeatedly framed a slowdown in progression-free survival event accrual as potentially consistent with favorable active-treatment performance. As set forth in the complaint, shareholders later learned that the Phase III Fianlimab-Libtayo Study required an expanded patient population for PFS analysis and then failed to reach statistical significance on its primary endpoint.
Timeline of Alleged Disclosure Failures
August 1, 2025: Regeneron stated that enrollment for the PFS cohort had completed, but results were delayed because blinded PFS event accrual had slowed.November 17, 2025: Company representatives allegedly continued to associate the slower event rate with possible strength in the test arms.March 2026: The complaint alleges that public statements continued to suggest confidence in statistical powering and the possibility of durable treatment effect.April 29, 2026: Regeneron disclosed that the PFS analysis would include all patients enrolled with at least six months of follow-up, and REGN fell $45.41 per share.May 15, 2026: Regeneron announced after market close that the Phase 3 trial did not reach statistical significance for improvement in PFS, followed by a $68.57 per-share decline on May 18, 2026. Why the Sequence Matters to REGN Shareholders
It is alleged that the timeline reflects a growing disparity between Regeneron’s investor-facing statements regarding the Phase III Fianlimab-Libtayo Study and the statistical risks allegedly emerging during the study. The complaint contends that the April protocol change and May trial result corrected earlier alleged impressions about the strength and reliability of the study’s path to readout.
Timely disclosure of material clinical trial developments is fundamental to fair and efficient markets, particularly where investors are tracking a pivotal study with delayed event accrual. The complaint alleges that Regeneron's chronology matters because each update affected how shareholders assessed trial risk. -- Joseph E. Levi, Esq.
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Frequently Asked Questions About the REGN Lawsuit
Q: How much did REGN stock drop? A: Shares declined from $731.77 on April 28, 2026 to $629.68 on May 18, 2026, a decline of $102.09 per share, or approximately 13.95%, after disclosures concerning the Phase III Fianlimab-Libtayo Study.
Q: What specific misstatements does the REGN lawsuit allege? A: The complaint alleges Regeneron made materially false or misleading statements regarding the risk of clinical failure in the Phase III Fianlimab-Libtayo Study, including statements that allegedly minimized risks tied to slowed event accrual and statistical validity.
Q: When did Regeneron allegedly mislead investors? A: The Class Period runs from August 1, 2025 to May 15, 2026. The complaint alleges that corrective disclosures concerning the trial protocol and failure to meet the primary endpoint caused significant stock declines.
Q: What court was the REGN class action filed in? A: The case was filed in the United States District Court for the Southern District of New York and asserts claims under the federal securities laws.
Q: What is a lead plaintiff and why does it matter? A: A lead plaintiff is the investor appointed by the court to represent the class. Lead plaintiffs are typically investors with substantial documented losses and may help oversee the litigation on behalf of the class.
Q: What documents should REGN investors keep? A: Investors should keep brokerage statements or trade confirmations showing purchase dates, share quantities, prices paid, and any subsequent sale dates and prices.
Q: What if I already sold my REGN shares, can I still recover losses? A: Yes. Eligibility is based on when you purchased, not whether you still hold the shares. Investors who bought during the Class Period and sold at a loss may still be eligible to participate.
Q: What does it cost me to participate? A: There is no upfront cost for an evaluation. Securities class actions are generally handled on a contingency basis, with any attorneys' fees and expenses subject to court approval.
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Regeneron Pharmaceuticals ends August on a high note. The decline in U.S. sales of Eylea following the launch of biosimilars is no longer putting pressure on REGN stock. That's because REGN's Dupixent sales reached €5.15 billion in the second quarter, up 23.6% sequentially.
LOS ANGELES, Aug. 25, 2026 (GLOBE NEWSWIRE) -- The Portnoy Law Firm advises Regeneron Pharmaceuticals, Inc., (“Regeneron” or the "Company") (NASDAQ: REGN) investors of a class action on behalf of investors that bought securities between August 1, 2025 and May 15, 2026, inclusive (the “Class Period”). Regeneron investors have until September 14, 2026 to file a lead plaintiff motion.
Investors are encouraged to contact attorney Lesley F. Portnoy, by phone 310-692-8883 or email: [email protected], to discuss their legal rights, or join the case via https://portnoylaw.com/regeneron-pharmaceuticals-inc. The Portnoy Law Firm can provide a complimentary case evaluation and discuss investors’ options for pursuing claims to recover their losses.
The Regeneron class action lawsuit alleges that defendants throughout the Class Period made false and/or misleading statements and/or failed to disclose that: (i) defendants created the false impression that they possessed reliable information demonstrating that Regeneron’s Phase III Fianlimab-Libtayo Study was well-poised for success, while minimizing risks to the study’s odds of achieving its primary endpoint and its overall statistical validity arising from the prolonged event rate slowdown; (ii) Regeneron’s preliminary statistical assumptions were fundamentally flawed; (iii) the active treatment arm was failing to achieve meaningful clinical differentiation over standard therapies; and (iv) the trial would ultimately fail to reach statistical significance on its primary endpoint even without overperformance of the control arm.
On April 29, 2026, during Regeneron’s first quarter earnings call, defendants allegedly disclosed that the Phase III Fianlimab-Libtayo Study had been altered, expanding the number of patients in the study eligible for “analysis of progression-free survival.” On this news, the price of Regeneron stock declined more than 6%, according to the complaint.
Then, after-market on May 15, 2026, Regeneron issued a press release allegedly announcing that the “Phase 3 Trial of Fianlimab . . . did not reach statistical significance for the primary endpoint of improvement in progression-free survival (PFS).” On this news, the price of Regeneron stock dropped nearly 10%, according to the complaint.
The Portnoy Law Firm represents investors in pursuing claims caused by corporate wrongdoing. The Firm’s founding partner has recovered over $5.5 billion for aggrieved investors. Attorney advertising. Prior results do not guarantee similar outcomes.
Lesley F. Portnoy, Esq.
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310-692-8883
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NEW YORK, Aug. 25, 2026 (GLOBE NEWSWIRE) -- SueWallSt alerts investors in Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) that a securities class action has been filed on behalf of shareholders who purchased REGN securities between August 1, 2025 and May 15, 2026. Submit your information now.
REGN shares allegedly declined $102.09 per share, or 13.95%, from the Class Period high of $731.77 on April 28, 2026 to $629.68 after disclosures concerning the Phase III Fianlimab-Libtayo Study. IMPORTANT DATE: September 14, 2026 is the deadline for investors seeking appointment as lead plaintiff.
Regulatory Compliance Risk Allegedly Became Investor Loss
The complaint challenges whether Regeneron adequately disclosed the clinical, statistical, and regulatory risks surrounding its Phase III Fianlimab-Libtayo Study. The case alleges that public statements minimized the risk that slowing event accrual reflected flaws in preliminary statistical assumptions, rather than durable efficacy in the active treatment arms.
As alleged, Regeneron’s study design also had to account for FDA Optimus requirements concerning dose contribution. The lawsuit contends that the Company’s statements did not sufficiently disclose that the active treatment arm was allegedly failing to show meaningful differentiation over standard therapies.
Disclosure Gaps Alleged in the Phase III Study
The action claims investors were not adequately informed that:
The prolonged slowdown in progression-free survival event accrual allegedly increased the risk of clinical failure.The study’s statistical assumptions and design left it more vulnerable to missing its primary endpoint.The active treatment arm allegedly lacked meaningful clinical differentiation over pembrolizumab and other standard therapies.A protocol amendment expanded the PFS analysis population to include all patients with at least 6 months of follow-up.The study ultimately did not reach statistical significance for its primary endpoint of improved PFS. Alleged SEC Disclosure Adequacy Issues
The complaint alleges that Regeneron’s public disclosures mischaracterized the actual risk of failure facing the study and minimized risks to the study’s odds of achieving its primary endpoint and overall statistical validity. On April 29, 2026, Regeneron disclosed that the protocol had been changed to expand the eligible patient group for PFS analysis.
On May 15, 2026, after market close, Regeneron announced that the Phase 3 Trial of Fianlimab did not reach statistical significance for the primary endpoint of improvement in PFS. The lawsuit alleges these disclosures corrected earlier alleged misstatements and caused investors to suffer losses.
"Generic risk factor language cannot substitute for disclosing specific, known problems that are already affecting a company's operations. Here, investors should review whether the alleged protocol, statistical, and FDA Optimus-related protocol amendment risks were adequately disclosed before REGN shares declined." -- Joseph E. Levi, Esq.
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Frequently Asked Questions About the REGN Lawsuit
Q: What is the REGN class action lawsuit about? A: A securities class action has been filed against Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) alleging materially false and misleading statements between August 1, 2025 and May 15, 2026. Shares fell approximately 13.95% after the Company disclosed a protocol amendment and later announced that the Phase 3 Fianlimab trial did not reach statistical significance for the primary endpoint of improvement in progression-free survival. Investors who purchased shares during the Class Period and suffered losses may be eligible to seek compensation.
Q: What specific misstatements does the REGN lawsuit allege? A: The complaint alleges Regeneron made materially false or misleading statements regarding the Phase III Fianlimab-Libtayo Study, including statements that allegedly characterized slowing event accrual as a potentially favorable sign while minimizing statistical validity and clinical-failure risks. When the protocol amendment and failed primary endpoint were disclosed, the stock price declined sharply.
Q: What court was the REGN class action filed in? A: The case was filed in the United States District Court for the Southern District of New York and is governed by the Private Securities Litigation Reform Act of 1995.
Q: What is a lead plaintiff and why does it matter? A: A lead plaintiff is the investor appointed by the court to represent the entire class. Lead plaintiffs are typically investors with the largest documented losses. Being appointed does not increase individual recovery but gives direct oversight of how the case is run.
Q: What documents do I need to submit my information? A: Brokerage statements or trade confirmations showing purchase dates, share quantities, prices paid, and any subsequent sale dates and prices.
Q: What if I already sold my REGN shares, can I still recover losses? A: Yes. Eligibility is based on when you purchased, not whether you still hold the shares. Investors who bought during the Class Period and sold at a loss may still be eligible to participate.
Q: Do I need to go to court or give testimony? A: No. The overwhelming majority of class members never appear in court or give depositions. If there is a settlement or recovery, eligible class members generally submit a claim form to seek their portion.
Q: What does it cost me to participate? A: There is no upfront cost to contact the firm. Securities class actions are generally handled on a pure contingency basis. No upfront fees, no retainer, and no out-of-pocket costs. Any attorneys' fees and expenses awarded to class counsel are subject to court approval.
NEW YORK, Aug. 25, 2026 (GLOBE NEWSWIRE) -- Pomerantz LLP announces that a class action lawsuit has been filed against Regeneron Pharmaceuticals, Inc. (“Regeneron” or the “Company”) (NASDAQ: REGN). Such investors are advised to contact Danielle Peyton at [email protected] or 646-581-9980, (or 888.4-POMLAW), toll-free, Ext. 7980. Those who inquire by e-mail are encouraged to include their mailing address, telephone number, and the number of shares purchased.
The class action concerns whether Regeneron and certain of its officers and/or directors have engaged in securities fraud or other unlawful business practices.
You have until September 14, 2026, to ask the Court to appoint you as Lead Plaintiff for the class if you purchased or otherwise acquired Regeneron securities during the Class Period. A copy of the Complaint can be obtained at www.pomerantzlaw.com.
[Click here for information about joining the class action]
On April 29, 2026, during Regeneron’s first quarter earnings call, the Company disclosed that the Phase III Fianlimab-Libtayo Study had been altered, expanding the number of patients in the study eligible for “analysis of progression-free survival.”
On this news, Regeneron’s stock price fell $45.41 per share, or 6.21%, to close at $686.36 per share on April 29, 2026.
Then, on May 15, 2026, Regeneron issued a press release disclosing that the “Phase 3 Trial of Fianlimab . . . did not reach statistical significance for the primary endpoint of improvement in progression-free survival (PFS).”
On this news, Regeneron’s stock price fell $68.57 per share, or 9.82%, to close at $629.68 per share on May 16, 2026.
Pomerantz LLP, with offices in New York, Chicago, Los Angeles, London, Paris, and Tel Aviv, is acknowledged as one of the premier firms in the areas of corporate, securities, and antitrust class litigation. Founded by the late Abraham L. Pomerantz, known as the dean of the class action bar, Pomerantz pioneered the field of securities class actions. Today, more than 85 years later, Pomerantz continues in the tradition he established, fighting for the rights of the victims of securities fraud, breaches of fiduciary duty, and corporate misconduct. The Firm has recovered numerous multimillion-dollar damages awards on behalf of class members. See www.pomlaw.com.
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SAN FRANCISCO, Aug. 25, 2026 (GLOBE NEWSWIRE) -- Hagens Berman Sobol Shapiro LLP alerts investors in Regeneron Pharmaceuticals (NASDAQ: REGN) that a securities class action lawsuit has been filed after its surprising revelations concerning a Phase 3 clinical trial of a therapy intended to treat patients with melanoma.
The news that the trial failed drove the price of Regeneron shares sharply lower and, along with the severe market reaction ($11 billion market cap wipeout), triggered the lawsuit which seeks to represent investors who purchased or otherwise acquired shares of Regeneron common stock between August 1, 2025 and May 15, 2026.
National shareholder rights firm Hagens Berman is investigating the legal claims and urges Regeneron investors with substantial losses to submit your losses now. The firm also invites persons who may be able to assist in the investigation to contact its attorneys.
View our latest video summary of the allegations: youtu.be/rsW1-f8ARRs
Class Period: Aug. 1, 2025 – May 15, 2026
Lead Plaintiff Deadline: Sept. 14, 2026
Visit: www.hbsslaw.com/regn
Contact the Firm Now: [email protected]
844-916-0895
Regeneron Pharmaceuticals, Inc. (REGN) Securities Class Action:
The litigation is focused on the propriety of Regeneron’s repeated optimism about the state of- (and changes to-) its Phase 3 trial of Fianlimab in combination with Libtayo as a first-line treatment for metastatic or locally advanced melanoma (the “Study”).
The Study’s primary endpoint was progression-free survival (“PFS”) and Regeneron has characterized the combination as a “potential blockbuster.” “Events” – disease progression or death – determined the timing and statistical power of the primary PFS analysis.
The complaint alleges that Regeneron made false and misleading statements while failing to disclose critical information to investors. In particular, the lawsuit accuses the company and its management of not informing investors that the Study’s preliminary statistical assumptions were flawed, the active treatment arm was not achieving meaningful differentiation over standard therapies, and achievement of its primary endpoint was unlikely.
Throughout the Class Period, Regeneron and the other defendants assured investors of their confidence in the Trial’s achieving its primary endpoint even when events were slowing down. At one point, management said the slowing event rates are “because the test arms are performing well.”
The truth began to emerge on April 29, 2026, when Regeneron first revealed that it decided to alter the Trial protocol such that “t]he primary analysis of progression-free survival will now consider all patients enrolled in the study with a minimum follow-up of 6 months.”
One prominent analyst reportedly questioned whether the decision was made because, in contrast to management’s expressed confidence, the “underlying PFS benefit may be insufficient to show statistical significance.”
Then, on May 12, 2026, Regeneron admitted that the decision to alter the Trial protocol was made in response to “slow event rates,” occurred nearly six months ago, and was “submitted it to all the global regulatory authorities in November, December timeframe.”
Three days later, the final blow came. On May 15, 2026, Regeneron abruptly reported the “trial did not reach statistical significance of the primary endpoint of improvement in progression-free survival (PFS).”
“We’re focused on whether Regeneron altered the Trial protocol without timely telling investors to intentionally mislead them because the defendants knew so-called blockbuster potential for the combination wasn’t really there,” said Reed Kathrein, the Hagens Berman partner leading the firm’s investigation of the pending claims in the suit.
If you invested in Regeneron and have substantial losses, or have knowledge that will assist the firm’s investigation, submit your losses now »
If you’d like more information and answers to other frequently asked questions about the Regeneron case and the firm’s investigation, read more »
Whistleblowers: Persons with non-public information regarding Regeneron should consider their options to help in the investigation or take advantage of the SEC Whistleblower program. Under the new program, whistleblowers who provide original information may receive rewards totaling up to 30 percent of any successful recovery made by the SEC. For more information, call Reed Kathrein at 844-916-0895 or email [email protected].
About Hagens Berman
Hagens Berman is a global plaintiffs’ rights complex litigation firm focusing on corporate accountability. The firm is home to a robust practice and represents investors as well as whistleblowers, workers, consumers and others in cases achieving real results for those harmed by corporate negligence and other wrongdoings. Hagens Berman’s team has secured more than $2.9 billion in this area of law. More about the firm and its successes can be found at hbsslaw.com. Follow the firm for updates and news at @ClassActionLaw.
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Contact: Hagens Berman, Reed Kathrein, 715 Hearst Avenue, Suite 300, Berkeley, CA 94710, 844-916-0895, [email protected]
A video accompanying this announcement is available https://www.globenewswire.com/NewsRoom/AttachmentNg/44baab57-ffb8-4e0b-bd87-7f7df44722d4
Regeneron (REGN) Securities Class Action Filed - Sept 14, 2026 Lead Plaintiff Deadline - Act Now Regeneron (REGN) Securities Class Action Filed - Sept 14, 2026 Lead Plaintiff Deadline - Act Now
