(SeaPRwire) –   VANCOUVER, BC, May 30, 2026 — (TSX: LUN) (Nasdaq Stockholm: LUMI) Lundin Mining Corporation (“Lundin Mining” or the “Company”) has shared the following updated details on its share capital and voting rights, in compliance with the Swedish Financial Instruments Trading Act.

As of May 29, 2026, the total number of issued and outstanding common voting shares of the Company fell by 231,484 to 855,378,907. The reduction in issued and outstanding shares between May 1, 2026 and this date stems from share repurchases completed under the normal course issuer bid (“NCIB”), which was partially offset by the exercise of employee stock options or the vesting of employee share units.

Normal Course Issuer Bid

Per the Company’s shareholder distribution policy, Lundin Mining has committed to allocating up to US$150 million annually for share repurchases through the NCIB program. As of this update in 2026, the Company has acquired 1,850,094 common shares at a total cost of roughly US$51 million.

ESTMA Report

Lundin Mining has filed its Extractive Sector Transparency Measures Act (ESTMA) Report for the fiscal year ended December 31, 2025, which is available on the Company’s official website (lundinmining.com).

About Lundin Mining

Lundin Mining is a Canadian mining company headquartered in Vancouver, British Columbia, with three operating mines across Brazil and Chile. The firm produces metals that underpin global development, supporting infrastructure buildout, electrification, technological innovation, and economic resilience. Its strategic vision is to become one of the world’s top 10 copper producers. To reach this goal, the Company is executing a targeted growth strategy, including advancing one of the world’s largest copper, gold, and silver projects in the Vicuña District along the Argentina-Chile border, where it holds a 50% ownership stake. It also holds a 31% interest in the Los Helados project, located adjacent to its operating Caserones mine, which provides long-term growth flexibility. Lundin Mining has a proven track record of creating value through resource expansion, operational excellence, and responsible development. The Company’s shares trade on the Toronto Stock Exchange (LUN) and Nasdaq Stockholm (LUMI). Additional information can be found at www.lundinmining.com.

The details in this release related to updated share capital and voting rights are subject to the disclosure requirements Lundin Mining must follow under the Swedish Financial Instruments Trading Act. The information regarding the ESTMA Report complies with the disclosure obligations outlined in the Swedish Securities Market Act for the Company. This content was submitted for publication via the below-listed contacts on May 29, 2026 at 4:00 PM Pacific Time.

For additional information, please contact: Stephen Williams, Vice President, Investor Relations: +1 604 806 3074; Robert Eriksson, Investor Relations Sweden: +46 8 440 54 50