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Greatland Resources Ltd (AIM:GGP, OTC:GRLGF, FRA:G8G, ASX:GGP) has outlined a substantial new critical minerals asset within its Paterson Province portfolio, delivering a maiden mineral resource estimate for the O’Callaghans tungsten-copper-zinc-lead deposit in Western Australia.

The resource totals 70 million tonnes (Mt) at 0.35% tungsten trioxide (WO₃), alongside 0.30% copper, 0.57% zinc and 0.28% lead, positioning O’Callaghans as one of the largest high-grade tungsten deposits globally.

2025 O’Callaghans Mineral Resource Statement.

The update forms part of Greatland’s broader December 2025 Group Mineral Resource release, which also delivered a major uplift at the Telfer gold-copper operation and reinforced the scale of its Paterson Province footprint.

Strategic tungsten exposure emerges O’Callaghans introduces a new commodity stream to Greatland’s predominantly gold-copper portfolio, with tungsten increasingly recognised as a critical mineral across major economies.

Satellite image showing Telfer mine and infrastructure and O’Callaghans deposit location.

Tungsten’s unique physical properties — including extreme hardness and heat resistance — make it difficult to substitute in applications spanning mining, construction, aerospace and defence. According to the company, aerospace and defence sectors account for roughly a quarter of global demand.

Supply dynamics have also tightened. China, which produces around 80% of global tungsten, imposed export controls in early 2025 and has since shifted from a net exporter to a significant importer, contributing to a sharp increase in benchmark prices.

Against this backdrop, Greatland’s maiden resource positions O’Callaghans as a potentially strategic asset with exposure to both base metals and critical minerals markets.

Benchmarking of O’Callaghans MRE against global (ex-China, Russia and North Korea) tungsten deposits.

Large, high-confidence resource base The O’Callaghans resource is notable not only for its scale but also for its level of geological confidence.

Of the 70Mt total resource, more than 95% sits within the higher-confidence Indicated category, supported by about 71,000 metres of drilling across 184 holes at around 100-metre spacing.

Contained metal estimates include:

246,000 tonnes of WO₃ (tungsten trioxide) 207,000 tonnes of copper 371,000 tonnes of zinc 182,000 tonnes of lead The polymetallic nature of the deposit provides multiple potential revenue streams, with mineralisation hosted in a skarn system located about 300 metres below surface.

Schematic geological section of O’Callaghans deposit.

Leveraging proximity to Telfer A key advantage of the project is its location just 10 kilometres south of the Telfer processing hub, creating potential synergies with existing infrastructure.

While O’Callaghans is not currently the company’s primary focus, its proximity to Telfer could support development pathways that leverage established logistics, workforce and site infrastructure.

Historical work on the project includes a pre-feasibility study completed by a previous owner, which outlined a long-life underground mining operation with a dedicated processing plant and downstream tungsten refining capability.

Comparison with previous Mineral Resource estimates.

Portfolio diversification alongside gold-copper growth The O’Callaghans resource adds a new dimension to Greatland’s asset base at a time when the company is rapidly expanding its gold-copper inventory.

As outlined in the group update, Telfer’s resource has grown to 8.0Moz of gold, while the combined Telfer and Havieron inventory now stands at 14.9Moz of gold and 645,000 tonnes of copper, reinforcing the region’s potential as a long-life mining hub.

Within that broader context, O’Callaghans represents a complementary asset — one that provides optionality to diversify into critical minerals while maintaining a primary focus on gold and copper development.

Managing director Shaun Day said the deposit “presents latent value and optionality within Greatland’s portfolio, particularly in the strong prevailing tungsten market conditions”.

Next steps and optionality Greatland said its immediate priority remains advancing Telfer and the Havieron development, but the scale and quality of the O’Callaghans resource provide a clear basis for future evaluation.

The company is assessing pathways to demonstrate and enhance the project’s value, which could include further technical studies, partnerships or staged development options.

With strong underlying demand for critical minerals and tightening global supply, O’Callaghans adds a strategic lever to Greatland’s broader growth strategy in the Paterson Province.

Sona Nanotech Inc (CSE:SONA, OTCQB:SNANF) has announced the appointment of two oncologists, Michael Smylie and Jonathan Trites, to its scientific advisory board to support its ongoing clinical and research initiatives.

Dr Smylie is a medical oncologist at the Cross Cancer Institute in Edmonton and a clinical professor at the University of Alberta.

He is known for his work in melanoma research, including his involvement in the CheckMate 067 clinical trial. The study examined the effects of combination immunotherapy treatments for advanced melanoma and contributed to evolving standards of care, particularly in improving long-term survival outcomes.

Dr Trites is a head and neck oncologic and reconstructive surgeon based at the Queen Elizabeth II Health Sciences Centre in Halifax and serves as an associate professor at Dalhousie University.

His research has focused on surgical approaches for head and neck cancers, including the use of minimally invasive techniques. His published work includes findings on transoral laser microsurgery as a treatment option for certain advanced-stage cancers, as well as studies on various forms of squamous cell carcinoma.

Sona’s chief medical officer, Dr Carman Giacomantonio, said the two physicians bring significant clinical and research experience that will inform the company’s future clinical direction.

“The clinical course we are embarking upon is truly pioneering. Both Dr Trites and Dr Smylie have been pioneers throughout their careers in their respective fields, giving me and my team a tremendous amount confidence as we plan and begin to execute our clinical course going forward,” Giacomantonio said.

Active Energy Group PLC (AIM:AEG, OTCID:AEUSF) told investors that its digital infrastructure push in the UAE has moved a step forward after its subsidiary signed an agreement aimed at supporting licensing, power access and site development for crypto mining operations.

The AIM-listed company said Active Mining Group has entered into a services and facilitation agreement with the Private Office of HH Sheikh Mohammed bin Ahmed bin Hamdan bin Mohammed Al Nahyan, with Black Road Investment Group and affiliated companies acting as liaison partner.

The agreement supports the addition of a dedicated Abu Dhabi cryptocurrency mining licence, adding to Active Mining Group’s existing licences across the UAE.

It is also structured to help develop and aggregate an initial 50 MVA of capacity across multiple sites in the country, including sites owned or controlled by Black Road and its affiliates.

Active Energy said the framework will support engagement with federal and emirate-level authorities, utilities and infrastructure providers, alongside work to secure ultra-low-cost power capacity, land access and required approvals.

Chief executive Paul Elliott said the agreement strengthens the company’s ability to access and secure infrastructure at scale, adding that it provides “a clear pathway” toward Active Energy’s targeted 100 MVA deployment.

In London, Active Energy shares climbed 12.15%, changing hands at 0.12p each.

Shares in Flutter Entertainment PLC (LSE:FLTR, NYSE:FLUT), the world's largest online sports betting and gaming operator, fell 4% to 7,404p after the company reported a sharp drop in profits and trimmed its full-year guidance, overshadowing a stronger-than-expected revenue performance.

Net income fell 38% to $209 million in the first quarter, with earnings per share down 22% to $1.23, as costs from recent acquisitions and investment in its US prediction markets business weighed on the bottom line. Adjusted EBITDA rose just 2% to $631 million on revenues up 17% to $4.3 billion.

Full-year guidance was cut, with group revenue now expected at $18.3 billion and adjusted EBITDA at $2.865 billion, down from prior targets of $18.4 billion and $2.97 billion, respectively, reflecting unfavourable sports results and the costs of a new launch in Arkansas.

US revenues grew 6% to $1.76 billion, but sportsbook grew just 1% as Flutter continued to absorb the effects of customer losses that began in the fourth quarter of 2024. FanDuel's active player base was 6% lower year-on-year, though underlying trends improved through the quarter and returned to growth in March.

Flutter announced management changes alongside the results, with Dan Taylor appointed president of Flutter Entertainment with oversight of FanDuel, while Christian Genetski assumes day-to-day leadership of the US business following the departure of Amy Howe.

International revenues rose 27% to $2.54 billion, boosted by the Snai and Betnacional acquisitions, though organic revenue was flat year-on-year.

Chief executive Peter Jackson said the core fundamentals of the business remained strong and that Flutter had the right strategy and portfolio of brands to capitalise on long-term growth opportunities.

Flutter said it had commenced a review of its London Stock Exchange listing.