Welcome to our dedicated page for Fortuna Mining SEC filings (Ticker: FSM), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
Fortuna Mining Corp. filings document the U.S. disclosure record of a Canadian issuer with common shares listed on the NYSE and TSX under FSM and FVI.
Its Form 40-F annual report and Form 6-K current reports disclose audited and interim consolidated financial statements, MD&A, management certifications, operating results and Mineral Reserve and Mineral Resource estimates for mines and projects in West Africa and Latin America. The filings also cover material-event disclosures such as exploration agreements, normal course issuer bid activity, annual meeting and record-date notices, common-share information, and governance policies including the Code of Conduct and Business Ethics.
Fortuna Mining Corp. filed a Form 6-K announcing timing for its upcoming financial disclosure. The company will release its financial statements and MD&A for the fourth quarter and full year 2025 on February 18, 2026, after market close. Management will then host a conference call on February 19, 2026, at 9:00 a.m. Pacific / 12:00 p.m. Eastern to discuss financial and operational results.
The call will feature the President and CEO, CFO, and regional COOs for West Africa and Latin America. Investors can access the live webcast via the provided link or join by phone using the listed toll-free and international numbers and access code. A replay will be available by phone until March 5, 2026, and the webcast replay will remain accessible until February 19, 2027, with a transcript archived on the company’s website.
Fortuna Mining Corp. has submitted an application for an exploitation permit for its Diamba Sud Gold Project in Senegal to the Ministry of Energy, Petroleum, and Mines on February 4, 2026. This is a key regulatory step toward possible mine development.
The company is advancing early works at Diamba Sud, including site preparation and detailed engineering programs aimed at supporting a feasibility study and de-risking critical path activities. An updated Mineral Resource estimate is planned by the end of February 2026, forming the basis for Mineral Reserve estimation.
This work is intended to support evaluation of a potential construction decision for Diamba Sud, which the company is targeting for mid-2026. Earlier, a Preliminary Economic Assessment completed in October 2025 indicated robust project economics for the deposit.
Fortuna Mining Corp. reports a major update to its Séguéla Mine in Côte d'Ivoire, with Proven and Probable Mineral Reserves of 1.54 million ounces of gold in 16.0 million tonnes as of December 31, 2025. This reflects a 31% increase in contained gold ounces since October 31, 2025, driven in part by adding 401,000 ounces of underground reserves at the Sunbird deposit and higher average grades of 3.01 g/t Au.
The company states that Séguéla’s mine life now exceeds nine years at current production rates, with exploration drilling from late 2025 still to be incorporated into models. Measured and Indicated Mineral Resources, excluding reserves, decreased by 333,000 ounces as material was converted into underground reserves, while Inferred Resources remained relatively unchanged.
Fortuna has also started a processing plant expansion study to evaluate increasing capacity from 1.75 Mtpa to between 2.0 and 2.5 Mtpa, which it says has the potential to support annual gold production of more than 200,000 ounces at Séguéla.
Fortuna Mining Corp. submitted a Form 6-K as a foreign private issuer for November 2025. The report is primarily administrative and lists several exhibits rather than providing financial results. The key exhibit is an NI 43-101 Technical Report for the Diamba Sud Gold Project, which is a formal technical disclosure commonly required for mineral projects. The filing also includes multiple expert consent letters related to that technical report and a news release dated November 26, 2025. The document is signed on behalf of the company by President and CEO Jorge Ganoza Durant.
Fortuna Mining Corp. (FSM) received a Schedule 13G from Arrowstreet Capital, Limited Partnership and Arrowstreet Capital Holding LLC reporting beneficial ownership of 19,677,691 Common Shares, representing 6.4% of the class as of 09/30/2025.
Arrowstreet reports sole voting power over 16,112,823 shares and sole dispositive power over 19,677,691 shares, with no shared voting or dispositive power. The securities are held by investment advisory clients of Arrowstreet Capital, and no single client is known to hold more than five percent of the class. The filers certify the shares were acquired and are held in the ordinary course and not for the purpose of changing or influencing control.