Fortuna Mining Corp has filed a technical report for the Diamba Sud Gold Project in Senegal, supporting the results of its previously announced feasibility study. The filing, made in accordance with National Instrument 43-101 Standards of Disclosure for Mineral Projects, provides detailed backing for the project’s economic and operational viability. The report has an effective date of June 30, 2026, and is accessible to investors and stakeholders through regulatory databases.

The document supports the feasibility study results announced by Fortuna in its news release dated June 29, 2026. By filing this report, the company complies with regulatory requirements for mineral project disclosures, ensuring transparency regarding the project’s technical parameters and financial projections. The Diamba Sud Gold Project is located in the Kédougou Region of Senegal.

Availability and Access

The Technical Report is available for review on multiple platforms. Stakeholders can access it on Fortuna Mining Corp’s official website, as well as on SEDAR+ and EDGAR under the company’s profile. These filings provide comprehensive data on the project’s mineral reserves, mining methods, and economic assumptions.

Company Overview

Fortuna Mining Corp is a Canadian precious metals mining company with operations spanning several countries. The company manages three operating mines and a portfolio of exploration projects in Argentina, Côte d’Ivoire, Guinea, Guyana, and Peru, in addition to the Diamba Sud Gold Project in Senegal. Its focus includes gold and silver production, emphasizing environmental stewardship and social responsibility.

Fortuna Mining Corp. shareholders approved all matters of business at its 2026 annual general meeting held on June 25, 2026. A total of 202,415,038 common shares were represented at the meeting, accounting for 66.81% of Fortuna’s issued and outstanding shares as of the record date. Shareholders voted in favour of the appointment of auditors, the election of all director nominees listed in the Company’s Management Information Circular dated May 7, 2026, and the approval of the unallocated entitlements under the Company’s Share Unit Plan.

Director Election Results

All director nominees received majority support from shareholders. The detailed voting results for the election of directors are as follows:

Regulatory Filings

The Company’s Voting Results Report has been filed under Fortuna’s profile on SEDAR+ at www.sedarplus.ca and will be filed immediately after under Fortuna’s profile on EDGAR at www.sec.gov .