NATURE OF OPERATIONS	12 Months Ended
Dec. 31, 2025
NATURE OF OPERATIONS
NATURE OF OPERATIONS	1. NATURE OF OPERATIONS Fortuna Mining Corp. (the “Company”) is a publicly traded company incorporated and domiciled in British Columbia, Canada. The Company is engaged in precious and base metal mining and related activities in Argentina, Côte d’Ivoire, Mexico, Peru and Senegal. The Company operates the open pit Lindero gold mine (“Lindero”) in northern Argentina, the open pit Séguéla gold mine (“Séguéla”) in southwestern Côte d’Ivoire, and the underground Caylloma silver, lead, and zinc mine (“Caylloma”) in southern Peru, and is developing the Diamba Sud gold project in Senegal. On April 11, 2025, the Company completed the sale of its 100% interest in Compania Minera Cuzcatlan S.A. de C.V. (“Cuzcatlan”), which owns the San Jose silver and gold mine in southern Mexico (“San Jose”) (see Note 25). On May 12, 2025, the Company completed the sale of all of its interest in Roxgold SANU S.A. (“Sanu”), which owns and operates the underground and open pit Yaramoko gold mine in southwestern Burkina Faso (“Yaramoko”), and 100% of three other Burkina Faso subsidiaries (collectively with Sanu, the “Sanu Entities”) (see Note 25). The Company’s common shares are listed on the New York Stock Exchange (the “NYSE”) under the trading symbol FSM and on the Toronto Stock Exchange (the “TSX”) under the trading symbol FVI. The Company’s registered and head offices are located at Suite 820, 1111 Melville Street, Vancouver, British Columbia, V6E 3V6, Canada.

NATURE OF OPERATIONS

12 Months Ended

Dec. 31, 2025

1. NATURE OF OPERATIONS

Fortuna Mining Corp. (the “Company”) is a publicly traded company incorporated and domiciled in British Columbia, Canada.

The Company is engaged in precious and base metal mining and related activities in Argentina, Côte d’Ivoire, Mexico, Peru and Senegal. The Company operates the open pit Lindero gold mine (“Lindero”) in northern Argentina, the open pit Séguéla gold mine (“Séguéla”) in southwestern Côte d’Ivoire, and the underground Caylloma silver, lead, and zinc mine (“Caylloma”) in southern Peru, and is developing the Diamba Sud gold project in Senegal. On April 11, 2025, the Company completed the sale of its 100% interest in Compania Minera Cuzcatlan S.A. de C.V. (“Cuzcatlan”), which owns the San Jose silver and gold mine in southern Mexico (“San Jose”) (see Note 25). On May 12, 2025, the Company completed the sale of all of its interest in Roxgold SANU S.A. (“Sanu”), which owns and operates the underground and open pit Yaramoko gold mine in southwestern Burkina Faso (“Yaramoko”), and 100% of three other Burkina Faso subsidiaries (collectively with Sanu, the “Sanu Entities”) (see Note 25).

The Company’s common shares are listed on the New York Stock Exchange (the “NYSE”) under the trading symbol FSM and on the Toronto Stock Exchange (the “TSX”) under the trading symbol FVI.

The Company’s registered and head offices are located at Suite 820, 1111 Melville Street, Vancouver, British Columbia, V6E 3V6, Canada.