Definitive agreements have been executed for an approximately US$35.6 million strategic investment by the US Department of War into the Ambler Metals joint venture structure, advancing the development of critical mineral projects in northwestern Alaska. The transaction involves both Trilogy Metals and South32, the two equal partners behind Ambler Metals, and is expected to close in September subject to customary closing conditions.
Under the agreements, the US Department of War will invest US$17.8 million directly into Trilogy Metals for 8.2 million units priced at US$2.17 per unit. Each unit comprises one share and three-quarters of a 10-year warrant exercisable at US$0.01 following completion of phase one of the proposed Ambler Access Project or a change of control. A further US$17.8 million will be paid to South32 for 8.2 million Trilogy Metals shares currently held by South32. South32 will also receive a 10-year call option to acquire an additional estimated 6.2 million Trilogy Metals shares at US$0.01 per share. Upon completion, the US government will hold a 10% non-diluted ownership position in Trilogy Metals.
Critically, both Trilogy Metals and South32 have committed to reinvest the entirety of the proceeds from this strategic investment into Ambler Metals. This means the full approximately US$35.6 million will flow into the 50/50 joint venture that holds the Upper Kobuk mineral projects, directly supporting exploration and development activities.
Strategic Investment Advances Ambler Minerals Development
Ambler Metals holds the Upper Kobuk mineral projects, which span approximately 190,929 hectares across northwestern Alaska. The projects focus on copper, zinc, lead, gold, silver and cobalt — minerals widely recognised as critical to secure supply chains. The strategic equity investment is intended to advance exploration and development work across this substantial project area.
Key preclosing milestones have already been completed, including the US government’s foreign ownership, control or influence risk assessment and Congressional authorisation. The transaction also includes board representation rights for the US Department of War, with the right to designate one independent director until October 2028 and appoint a non-voting board observer while holding at least 8 million shares.
The proposed Ambler Access Project, covering approximately 339.57 km, would connect the mining district to the Dalton Highway. The US Department of War has agreed to help facilitate financing for the road construction in coordination with Alaska, which would support the broader advancement of the Upper Kobuk mineral projects.
South32 and Trilogy Metals Reinvest Proceeds in Alaska
South32’s role in this strategic investment is significant. As the 50% owner of Ambler Metals, South32 is selling part of its Trilogy Metals shareholding to the US government as part of the transaction. By committing to reinvest its US$17.8 million in proceeds back into the joint venture, South32 is reinforcing its support for the development of the Upper Kobuk mineral projects alongside Trilogy Metals.
The strategic investment structure ensures that both joint venture partners channel fresh capital into Ambler Metals, strengthening the financial position of the venture as it progresses exploration and development of Alaska mining assets rich in critical minerals such as copper, cobalt and zinc. The closing of this strategic investment remains expected in September, subject to customary conditions.