Resource companies with operations in Greenland saw a sharp surge in after-hours trading on Friday, following President Trump's announcement of a security agreement with Denmark and the Arctic territory.

Shares of Greenland Energy Co (GLND:US) rocketed 119% in extended trading, while Greenland Mines (GLMN:US) climbed 58% and Critical Metals (CRML:US) advanced 20%. The rally appears to reflect investor expectations that an expanded US presence in Greenland could translate into stronger political support, infrastructure investment, and financing opportunities for the local resource sector.

Notably, the agreement did not outline any direct funding, permits, or commercial deals specifically tied to these three companies. President Trump stated that the pact grants the US a permanent role in Greenland's security affairs and would prevent adversaries from establishing military bases or making sensitive investments in the region without American approval. He also indicated the US would begin developing a larger military footprint on the island.

The agreement is expected to be signed during the UN General Assembly meetings in New York, but full terms have yet to be disclosed. Danish and Greenlandic officials have offered a more restrained interpretation of the arrangement. Danish Prime Minister Mette Frederiksen emphasized that it respects the sovereignty and territorial integrity of the Kingdom of Denmark, while Greenland's Premier Jens-Frederik Nielsen said it acknowledges the territory's interests.

From an investor perspective, the market's response underscores how tightly Greenland-focused stocks are now tied to US national security policy. The island holds substantial reserves of rare earth elements, precious metals, and other minerals used in defense systems, electronics, and energy technology. However, Friday's surge was driven primarily by market interpretation of the pact's potential impact rather than any immediate improvements in these companies' financials or project status.

Where to begin with the movers

Greenland Mines owns the Skaergaard project in southeastern Greenland, which contains gold, palladium, and platinum resources. The company recently completed its acquisition of the Sarfartoq rare earth project in the southwest. Sarfartoq is expected to focus on neodymium and praseodymium, elements critical for permanent magnets used in electric vehicles, wind turbines, and military equipment. Under a higher production scenario, Greenland Mines estimates the project could generate a pre-tax net present value of up to $2.05 billion. In a statement Friday, the company welcomed the security agreement, noting it reinforces Greenland's strategic importance to the US.

Critical Metals holds the Tanbreez rare earth project in southern Greenland, which the company describes as one of the world's largest known deposits of heavy rare earth elements. In May, Critical Metals signed a 15-year agreement to supply rare earth concentrate to REalloys, equivalent to 15% of Tanbreez's planned annual output. The project has also attracted interest from the US Export-Import Bank as Washington seeks supply chains less dependent on China. Investors may view the new security framework as reducing geopolitical uncertainty surrounding Tanbreez and improving its prospects for US government support, though the agreement itself announced no new financing for the project.

Greenland Energy is an early-stage oil and gas explorer focused on the Jameson Land basin in eastern Greenland. The company plans to fund exploration wells in exchange for a majority interest in the project. Its shares posted the largest gain on Friday, more than doubling in after-hours trading. The magnitude of the move suggests speculative interest in companies providing direct exposure to Greenland rather than a reaction to company-specific developments. Greenland halted new oil and gas exploration licenses in 2021 due to environmental concerns, though some older permits remain valid. Greenland Energy still needs regulatory approval before proceeding with its planned drilling program, making it the most speculative of the three Greenland-related trades. An expanded US military and infrastructure presence could eventually improve access to remote areas, but it would not override Greenland's permitting processes, nor does it guarantee commercially viable oil discoveries.

After-hours trading can be volatile given the limited number of shares available for purchase, meaning gains could narrow or reverse once regular trading resumes. Investors will also be watching for the final language of the agreement, along with any subsequent announcements regarding US funding, permits, or infrastructure developments affecting Greenland's resource projects.