Northern Dynasty: NMA, AEMA, AMA and the U.S. Chamber of Commerce File Court Documents Against the Illegal Obama/Biden Veto on One of the World's Largest Undeveloped Copper Projects, located in the U.S.

On December 1, 2025, Northern Dynasty announced that several major industry associations, including the National Mining Association (NMA), the American Exploration & Mining Association (AEMA), the Alaska Mining Association (AMA), and the U.S. Chamber of Commerce, have filed amicus ("friend of the court") briefs in the Alaska Federal Court. These filings support the company's lawsuit challenging the U.S. Environmental Protection Agency's (EPA) veto of the Pebble Project. CEO Ron Thiessen stated, "We appreciate the important support from the NMA, the AEMA, the AMA and the Chamber, as we fight back against the injustice of the illegal Obama/Biden-era veto."

The news is a positive but routine development in the company's ongoing legal battle. The entire investment thesis for Northern Dynasty hinges on the successful overturn of the EPA's veto, which has halted all progress on its sole asset, the Pebble Project.

A chronological review of the past year reveals a narrative dominated by legal and political maneuvering: - Early 2025: A new U.S. administration and a supportive executive order (March 24) created significant optimism, causing the stock to rally from sub-$1.00 levels. - Mid-2025: The company engaged in settlement talks with the EPA, leading to multiple delays (abeyances) in the court proceedings. This fueled market speculation, and the stock price surged to over $3.00 in early July. - July 18, 2025: The company filed a motion for summary judgment, indicating that settlement talks had not produced a result. The market reacted negatively to this failure to secure a quick negotiated victory, and the stock price collapsed from its highs. - September-October 2025: The company shored up its finances by receiving the fourth and final tranches of its US$60 million royalty financing package. It then formally filed its summary judgment legal briefs on October 6, arguing the EPA's veto was illegal. This action was a major catalyst, sending the stock to a 52-week high of $4.19. - November 19, 2025: The timeline for the government's legal response was delayed due to a federal shutdown, pushing the next key date to February 2026. This news caused a pullback in the stock.

The most recent news of amicus brief filings fits into this legal-procedural narrative. Gaining the formal support of major industry groups strengthens the company's case from a public policy and industry perspective. It signals to the court that the business community views the EPA's action as a dangerous precedent.

However, this news does not change the fundamental binary risk of the court case, nor does it accelerate the recently delayed timeline. It is an incremental positive, demonstrating that the company is executing its legal strategy as expected. It is not, however, a material event like a court ruling or a settlement agreement would be. The market's reaction to prior legal news has been extremely volatile, but this announcement is more procedural and supportive than a definitive step forward.

Northern Dynasty Minerals Ltd. is a Canadian-based mineral exploration and development company. Its principal asset is a 100% interest in the Pebble Project, located in southwest Alaska. The Pebble deposit is one of the largest undeveloped copper, gold, molybdenum, and silver deposits in the world and is a globally significant source of rhenium. The project's advancement is currently blocked by a 2023 "Final Determination" (veto) from the U.S. EPA under the Clean Water Act, which prohibits the discharge of materials in a specific area, effectively preventing the mine's development. The company is currently engaged in a federal lawsuit to have this veto overturned.