Fortuna Mining (FSM) submits NI 43-101 Diamba Sud Technical Report and consents

Rhea-AI Filing Summary

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.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 6-K

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR
15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of November 2025

Commission File Number 001-35297

Fortuna Mining Corp.

(Translation of registrant’s name into English)

1111 Melville Street, Suite 820, Vancouver, British Columbia, Canada V6E 3V6

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

FORM 20-F  ¨                                 FORM 40-F  x

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date:  November 26, 2025	Fortuna Mining Corp. (Registrant)
	By:	/s/ "Jorge Ganoza Durant"
		Jorge Ganoza Durant
		President and CEO

Exhibits:

99.1		NI 43-101 Technical Report – Diamba Sud Gold Project
99.2		Consent Eric Chapman
99.3		Consent Paul Weedon
99.4		Consent Raul Espinoza
99.5		Consent Matthieu F. Veillette
99.6		Consent Leendert (Leon) Lorenzen
99.7		News Release dated November 26, 2025

FAQ

What did Fortuna Mining Corp. (FSM) file on Form 6-K in November 2025?

Fortuna Mining Corp. filed a Form 6-K as a foreign private issuer, mainly to submit an NI 43-101 Technical Report for the Diamba Sud Gold Project, related expert consents, and a news release dated November 26, 2025.

What is the main technical document referenced in Fortuna Mining Corp. (FSM)'s November 2025 Form 6-K?

The main technical document is an NI 43-101 Technical Report – Diamba Sud Gold Project, which provides formal technical disclosure on that gold project.

Which additional exhibits accompany Fortuna Mining Corp. (FSM)'s NI 43-101 report?

The exhibits include multiple consent letters from experts (Eric Chapman, Paul Weedon, Raul Espinoza, Matthieu F. Veillette, and Leendert (Leon) Lorenzen) and a news release dated November 26, 2025.

Who signed Fortuna Mining Corp. (FSM)'s November 2025 Form 6-K?

The Form 6-K was signed on behalf of Fortuna Mining Corp. by Jorge Ganoza Durant, who is the company’s President and CEO.

Does Fortuna Mining Corp. (FSM) report under Form 20-F or Form 40-F?

The filing indicates that Fortuna Mining Corp. files its annual reports under Form 40-F.

What project is covered by the NI 43-101 Technical Report in Fortuna Mining Corp. (FSM)'s Form 6-K?

The NI 43-101 Technical Report covers the Diamba Sud Gold Project, which is the focus of the technical disclosure in the exhibits.