VANCOUVER, BC, July 21, 2026 /PRNewswire/ -- (TSX: LUN) (Nasdaq Stockholm: LUMI) Lundin Mining Corporation ("Lundin Mining" or the "Company") is closely monitoring the severe winter storm affecting northern and central Chile's Atacama Region, which has caused regional flooding and significant snowfall.

Operational Status

Ahead of the forecast weather event, Lundin Mining took certain precautionary measures to protect employees and infrastructure at the Candelaria and Caserones mining complexes.

Mining operations at Candelaria were impacted by heavy rainfall; however, the mill has continued to operate using existing ore stockpiles. At Caserones, operations were suspended on July 18^th and remain temporarily suspended due to heavy snowfall, which continues to limit access and has disrupted power at site. Backup power generators are currently supporting critical activities. Operations at Caserones are expected to resume as soon as power has been restored and better accessibility has been established.

The safety of our employees, contractors, nearby communities and environment remains our top priority. We continue to follow established protocols at both operations in response to this event and have been collaborating with first responders and local authorities to support communities in the region.

The Company incorporates weather disruptions into its annual guidance at Caserones, and at this time, the Company retains its full-year production guidance and remains on track to meet its targets. Lundin Mining will provide further updates to the extent appropriate, as the situation develops and more information becomes available.

Weather Outlook

The severe weather system affecting northern Chile and the Atacama Region has begun to weaken, with rainfall expected to continue easing over the next 24 to 48 hours. Additional weather systems may pass through the region this week, but current forecasts indicate they will be significantly less severe than the recent event. While conditions are improving, access restrictions and logistical delays may continue to affect operations in the region for several more days as infrastructure and road access are fully restored.

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 information was submitted for publication, through the agency of the contact persons set out below on July 21, 2026 at 1:00 Pacific Time.

Cautionary Statement on Forward-Looking Information

Certain of the statements made and information contained herein are "forward-looking information" within the meaning of applicable Canadian securities laws. All statements other than statements of historical facts included in this document constitute forward-looking information, including but not limited to statements regarding the impacts from the severe winter storm and inclement weather affecting northern and central Chile, including impacts on the Company's operations and their anticipated severity and duration; the Company's guidance on the timing and amount of future production and its expectations regarding the results of operations; and the Company's financial results and potential impacts thereto. Words such as "believe", "expect", "anticipate", "contemplate", "target", "plan", "goal", "aim", "intend", "continue", "budget", "estimate", "may", "will", "can", "could", "should", "schedule" and similar expressions identify forward-looking information.

Forward-looking information is necessarily based upon various estimates and assumptions including, without limitation, the expectations and beliefs of management, including those related to the severity, duration and impacts of the sever winter storm in Chile; that the Company can access financing, appropriate equipment and sufficient labour; assumed and future price of copper, gold, zinc, nickel and other metals; anticipated costs; ability to achieve goals; the prompt and effective integration of acquisitions and the realization of synergies and economies of scale in connection therewith; that the political environment in which the Company operates will continue to support the development and operation of mining projects; and assumptions related to the factors set forth below. While these factors and assumptions are considered reasonable by Lundin Mining as at the date of this document in light of management's experience and perception of current conditions and expected developments, such information is inherently subject to significant business, economic and competitive uncertainties and contingencies. Known and unknown factors could cause actual results to differ materially from those projected in the forward-looking information and undue reliance should not be placed on such information. Such factors include, but are not limited to: dependence on international market prices and demand for the metals that the Company produces; political, economic, and regulatory uncertainty in operating jurisdictions, including but not limited to those related to permitting and approvals, nationalization or expropriation without fair compensation, environmental and tailings management, labour, trade relations, and transportation; risks relating to mine closure and reclamation obligations; health and safety hazards; inherent risks of mining, not all of which related risk events are insurable; risks relating to tailings and waste management facilities; risks relating to the Company's indebtedness; challenges and conflicts that may arise in partnerships and joint operations; risks relating to development projects; risks that revenue may be significantly impacted in the event of any production stoppages or reputational damage in Chile; the impact of global financial conditions, market volatility and inflation; business interruptions caused by critical infrastructure failures or damage; challenges of effective water management; exposure to greater foreign exchange and capital controls, as well as political, social and economic risks as a result of the Company's operation in emerging markets; risks relating to stakeholder opposition to continued operation, further development, or new development of the Company's projects and mines; any breach or failure information systems; risks relating to reliance on estimates of future production; risks relating to litigation and administrative proceedings which the Company may be subject to from time to time; risks relating to acquisitions or business arrangements; risks relating to competition in the industry; failure to comply with existing or new laws or changes in laws; challenges or defects in title or termination of mining or exploitation concessions; the exclusive jurisdiction of foreign courts; the outbreak of infectious diseases or viruses; risks relating to taxation changes; receipt of and ability to maintain all permits that are required for operation; minor elements contained in concentrate products; changes in the relationship with its employees and contractors; the Company's Mineral Reserves and Mineral Resources which are estimates only; payment of dividends in the future; compliance with environmental, health and safety laws and regulations, including changes to such laws or regulations; interests of significant shareholders of the Company; asset values being subject to impairment charges; potential for conflicts of interest and public association with other Lundin Group companies or entities; activist shareholders and proxy solicitation firms; risks associated with climate change and inclement weather events; the Company's common shares being subject to dilution; ability to attract and retain highly skilled employees; reliance on key personnel and reporting and oversight systems; risks relating to the Company's internal controls; counterparty and customer concentration risk; risks associated with the use of derivatives; exchange rate fluctuations; the terms of the contingent payments in respect of the completion of the sale of the Company's European assets and expectations related thereto; and other risks and uncertainties, including but not limited to those described in the "Risks and Uncertainties" section of the Company's MD&A for the year ended December 31, 2025 and for the three months ended March 31, 2026 and the "Risks and Uncertainties" sections of the Company's Annual Information Form for the year ended December 31, 2025, which are available on SEDAR+ at www.sedarplus.ca under the Company's profile.

All of the forward-looking information in this document are qualified by these cautionary statements. Although the Company has attempted to identify important factors that could cause actual results to differ materially from those contained in forward-looking information, there may be other factors that cause results not to be as anticipated, estimated, forecasted or intended and readers are cautioned that the foregoing list is not exhaustive of all factors and assumptions which may have been used. Should one or more of these risks and uncertainties materialize, or should underlying assumptions prove incorrect, actual results may vary materially from those described in forward-looking information. Accordingly, there can be no assurance that forward-looking information will prove to be accurate and forward-looking information is not a guarantee of future performance. Readers are advised not to place undue reliance on forward-looking information. The forward-looking information contained herein speaks only as of the date of this document. The Company disclaims any intention or obligation to update or revise forward-looking information or to explain any material difference between such and subsequent actual events, except as required by applicable law.

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