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LUN.TO ·

News release

Corporate Updates

Corporate Office

2800-1055 Dunsmuir St.

Vancouver, BC, V7X 1L2

Phone: +1 604.689.7842

lundinmining.com

News Release

Lundin Mining Publishes 2025 Sustainability Statement and

2025 Annual Report

Vancouver, BC, April 28, 2026 (TSX: LUN; Nasdaq Stockholm: LUMI) Lundin Mining Corporation (“Lundin

Mining” or the “Company”) is pleased to announce the publication of its Swedish Annual Report for the year ended

December 31, 2025 , including the Company’s first Sustainability Statement (the “Statement”) in accordance with

the Swedish Annual Accounts Act and the European Sustainability Reporting Standards ("ESRS") and Article 8 of

the EU Regulation 2020/852 (the "EU Taxonomy") under the EU Corporate Sustainability Reporting Directive

(“CSRD”).

Since 2010, Lundin Mining has published a comprehensive report on key environmental, health & safety,

governance, and social issues relevant to its communities, employees, investors, and stakeholders. 2025 marks

the Company’s first CSRD-aligned Sustainability Statement, introducing enhanced disclosure and greater rigour as

part of our commitment to responsible mining.

Jack Lundin, President and CEO, commented “At Lundin Mining, we are proud to produce the metals the world

needs responsibly, through disciplined environmental stewardship, strong partnerships with communities, and an

unwavering commitment to safety. Our inaugural Sustainability Statement under CSR D reflects the significant

progress we have made, as well as the transparency, accountability, and high standards embedded across our

business. As we continue to grow, we are well positioned to deliver lasting value for all stakeholders while supporting

a more sustainable future.”

2025 Highlights Include:

• Our Total Recordable Injury Frequency Rate (TRIFR) of 0.321 was a record for Lundin Mining, a testament

to the effectiveness of our ongoing safety initiatives and commitment of our teams.

• The Company advanced key greenhouse gas (GHG) emission reduction initiatives, including

at Chapada where the operation’s electricity needs are now met by renewable energy. With this increased

investment in renewables, all the electricity supplied to Lundin Mining’s operations now comes from

renewable sources. In order to advance Scope 3 action, the company has also updated its Scope 3

emissions inventory and intends to identify key suppliers who have established GHG emissions targets to

support engagement activities.

• All active tailings facilities fully conform to the Global Industry Standard on Tailings Management.

• Direct community investments from the Company’s corporate office and sites totaled approximately $ 9.3

million in 2025. These investments supported education, health, culture, community development and small

business development.

• Board composition exceeded the Company’s female representation target, with 37.5% of female directors.

Annual Report

The 2025 Swedish Annual Report is available for download from the Company's website at the following location:

https://lundinmining.com/investors/financial-reports/ and has been filed and is available in European Single

1 Calculated per 200,000 hours worked as per Occupational Safety and Health Administration (OSHA) methodology.

Electronic Format . The Sustainability Statemen t is als o availabl e as a stand-alon e docume nt at:

https://lundinmining.com/sustainability/reports/.

About Lundin Mining

Lundin Mining is a Canadian mining company headquartered in Vancouver, Canada with three operating mines in

Brazil and Chile. We produce metals that underpin global development, supporting infrastructure, electrification,

technological innovation, and economic resilience. Our strategic vision is to become a top ten global copper

producer. To get there, we are executing a clear growth strategy, which includes advancing one of the world’s

largest copper, gold, and silver projects in the Vicuña District on the border of Argentina and Chile, where we hold

a 50% interest. We also hold a 31% interest in the Los Helados project, located adjacent to our operating Caserones

mine, providing longer term growth optionality. Lundin Mining has a proven track record of value creation through

resource growth, operational excellence, and responsible development. The Company’s shares trade on the

Toronto Stock Exchange (LUN) and Nasdaq Stockholm (LUMI). Learn more at www.lundinmining.com.

This is information that Lundin Mining is obliged to make public pursuant to the Swedish Securities Markets Act

(Sw. lag (2007:528) om värdepappersmarknaden) . The information was submitted for publication, through the

agency of the contact persons set out below on April 28, 2026 at 8:30 PM 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