(MENAFN- Newsfile Corp) St. John's, Newfoundland and Labrador--(Newsfile Corp. - October 9, 2025) - Anteros Metals Inc. (CSE: ANT) ("Anteros" or the "Company") is pleased to announce that, further to its press release of October 7, 2025, the Company and Rift Minerals Inc. (" Rift ") have entered into an option and joint venture agreement (the " Agreement ") dated October 8, 2025, pursuant to which the Company has been granted an option (the " Option ") to acquire up to a 49% undivided right, title and interest in and to the in the Seagull Project, a critical minerals exploration stage property targeting platinum group elements (PGEs), nickel, copper, and helium (the " Property "). The Property is located approximately 80 kilometres northeast of Thunder Bay, Ontario.

In order to exercise the Option, the Company shall:

• Underwrite the Phase 1 cost of a 1,350m borehole at the Property (the " Drilling ") (estimated at a minimum of $400,000 and up to $600,000 of anticipated exploration costs) to earn a contingent 20% interest in the Property (" First Phase ");

• Make a one-time up-front cash payment to Rift in the amount of $50,000, such payment to be made before the Drilling is commenced; and

• Complete a second phase of exploration pursuant to Phase 1 results and recommendations for a Phase 2 exploration program (the " Second Phase ").

Upon completing the Second Phase, the Company and Rift will incorporate a joint venture (the " Joint Venture ") which will be governed by a joint venture agreement (the " JV Agreement "). If the Company does not enter into the Joint Venture or commence the Second Phase, the Option will not vest.

Upon completion of the First Phase, the Company will own 20% of the Joint Venture and Rift will own 80%. In the event that the Company funds and completes the Second Phase, the Company will acquire an additional 29% of the Joint Venture, and the Joint Venture will be 49% the Company and 51% Rift.

ABOUT ANTEROS METALS INC.

Anteros Metals Inc. is a Canadian exploration company focused on advancing a pipeline of critical minerals projects across Newfoundland and Labrador and select Canadian jurisdictions. The Company is targeting copper, nickel, zinc, and emerging strategic commodities that support the global energy transition. Immediate plans for their flagship Knob Lake Property include bringing the historical Fe-Mn Mineral Resource Estimate into current status as well as commencing baseline environmental and feasibility studies.

MENAFN09102025004218003983ID1110175405