Lundin Mining Announces Updated Share Capital and Provides Update on Share Buybacks

Corporate Office

1055 Dunsmuir Street

Suite 2800, Bentall IV

Vancouver, BC V7X 1L2

Phone: +1 604 689 7842

lundinmining.com

NEWS RELEASE

Lundin Mining Announces Updated Share Capital and Provides Update on Share

Buybacks

Vancouver, BC, September 30 , 20 25 (TSX: LUN; Nasdaq Stockholm: LUMI) Lundin Mining Corporation

(“Lundin Mining” or the “Company”) reports the following updated share capital and voting rights, in accordance

with the Swedish Financial Instruments Trading Act.

The number of issued and outstanding shares of the Company has increased by 368,147 to 856,468,476 common

shares with voting rights as of September 30, 2025. The increase in the number of issued and outstanding shares

from August 31, 2025 to date is a result of the exercise of employee stock options or the vesting of employee share

units. During this period, the Company did not purchase any shares for cancelation under its Normal Course Issuer

Bid program.

Normal Course Issuer Bid

Under the Company’s shareholder distribution policy, the Company is committed to allocating up to US$150 million

in annual share buybacks through the NCIB program. So far during 2025, Lundin Mining has acquired 12,629,000

common shares at a cost of approximately US$104 million.

About Lundin Mining

Lundin Mining is a diversified base metals mining company with operations or projects in Argentina, Brazil, Chile,

and the United States of America, primarily producing copper, gold and nickel.

The information in this release is subject to the disclosure requirements of Lundin Mining under the Swedish

Financial Instruments Trading Act. The information was submitted for publication, through the agency of the

contact persons set out below on September 30, 2025 at 16:00 Pacific Time.

For further information, please contact:

Stephen Williams, Vice President, Investor Relations: +1 604 806 3074

Robert Eriksson, Investor Relations Sweden: +46 8 440 54 50