VANCOUVER, BC, April 11, 2025 — (TSX: LUN) (Nasdaq Stockholm: LUMI) Lundin Mining Corporation (“Lundin Mining” or the “Company”) has announced its Annual Meeting will take place on Thursday, May 8, 2025 (the “Meeting”) at 11:30 a.m. Vancouver time, utilizing a hybrid format. The meeting will occur in person at 1055 Dunsmuir Street, Suite 2800, Bentall IV Centre, Vancouver, British Columbia, Canada, and also be available online via live audio webcast at . The Notice of Meeting, the accompanying Management Proxy Circular (the “Circular”), and all related meeting documents can be found on SEDAR+ under the Company’s profile at , as well as on the Company’s website at .

The Company has made provisions for shareholders and proxyholders to attend and vote both virtually and in person at this year’s Meeting. The record date for the Meeting is March 10, 2025. Eligible shareholders are encouraged to cast their votes online, by telephone, or through a proxy. Comprehensive instructions on how shareholders can participate in the Meeting and vote are included in the Circular, which also contains additional details regarding the items to be considered at the Meeting.

The Meeting will address the following:

• Receiving the audited consolidated financial statements of the Company for the year concluding on December 31, 2024, along with the auditor’s report.
• Electing the directors for the upcoming year.
• Appointing PricewaterhouseCoopers LLP, Chartered Professional Accountants, as the Company’s auditors for the next year, and empowering the directors to determine their compensation.
• Providing shareholders with an advisory vote concerning the Company’s executive compensation practices.
• Handling any other business that may properly arise during the Meeting or any adjournments or postponements thereof.

Notice and Access

Lundin Mining will be providing electronic access to meeting materials for shareholders, instead of mailing physical copies. Electronic versions of the Circular, additional meeting materials, and the Company’s audited consolidated financial statements for the year ending December 31, 2024, the auditor’s report on these statements, and the accompanying management’s discussion and analysis are available on the Company’s website at or on SEDAR+ under the Company’s profile at . The notice sent to shareholders will include instructions on how to request a paper copy of the Circular or related materials, if preferred.

Instructions for Voting Securities Traded on the Nasdaq Stockholm Exchange

The following information pertains to shareholders who hold their securities (“Euroclear Registered Securities”) via Euroclear Sweden AB, which are traded on the Nasdaq Stockholm Exchange. Holders of Euroclear Registered Securities are not considered registered holders of voting securities for the purpose of voting at the Meeting. Instead, these securities are registered under CDS & Co., the registration name of the Canadian Depositary for Securities. Holders of Euroclear Registered Securities will receive a Form of Proxy (the “Swedish Proxy”) directly from Computershare AB (“Computershare Sweden”) by mail. This Swedish Proxy cannot be used to directly vote securities at the Meeting. Instead, it must be completed and returned to Computershare Sweden, strictly following the instructions and deadlines provided with the Swedish Proxy.

First Quarter 2025 Results Conference Call and Webcast

The Company will publish its first quarter 2025 operational and financial results after the market closes on Wednesday, May 7, 2025. A webcast and conference call will be held on Thursday, May 8, 2025, to present these results. Details for the webcast and conference call are provided below.

Webcast / Conference Call Details:

Date: Thursday, May 8, 2025

Time: 7:00 AM PT | 10:00 AM ET

Listen Only Webcast:

Dial In for Investor & Analyst Q&A:

To join the call, click on the dial-in link above and complete the online registration. After registering, you will receive the dial-in information and a unique PIN to join the call and ask questions.

A replay of the webcast will be accessible by clicking on the webcast link above and will be archived on the Company’s website for a limited time.

About Lundin Mining

Lundin Mining is a diversified Canadian base metals mining company involved in operations and projects in Argentina, Brazil, Chile, and the United States of America, focused on producing copper, gold, and nickel. In December 2024, the Company announced the sale of its European assets to Boliden. The transaction is anticipated to be finalized in the second quarter of 2025, pending standard conditions and approvals.

The information contained in this release is subject to the disclosure requirements outlined in the EU Market Abuse Regulation for Lundin Mining. This information was submitted for publication through the contact persons listed below on April 10, 2025, at 4:00 pm Pacific Time.