Sierra Metals Acknowledges Press Release from Alpayana Regarding Intention to Revise Bid and Advises Shareholders to TAKE NO ACTION

TORONTO--(BUSINESS WIRE)-- Sierra Metals Inc. (TSX: SMT | OTCQX: SMTSF | BVL: SMT) (“Sierra” or the “Company”) acknowledges the press release issued yesterday on behalf of Alpayana S.A.C. (“Alpayana”) announcing an intention to update its previously announced unsolicited all-cash takeover bid to acquire all of the issued and outstanding common shares of Sierra (the "Hostile Bid"). Sierra advises shareholders to TAKE NO ACTION at this time.

Sierra continues to be committed to its long-term strategy of ensuring the Company delivers superior long-term value to all its shareholders and stakeholders. Also, as previously disclosed, Sierra continues to actively pursue negotiations with third parties that are in the process of reviewing Sierra's confidential information with a view to surfacing additional alternatives.

The Company advises shareholders to TAKE NO ACTION at this time until the Board of Directors makes a recommendation as to the merits of the amended Hostile Bid.

About Sierra Metals Inc.

Sierra Metals Inc. is a Canadian mining company focused on copper production with additional base and precious metals by-product credits at its Yauricocha Mine in Peru and Bolivar Mine in Mexico. The Company is intent on safely increasing production volume and growing mineral resources. Sierra Metals has recently had several new key discoveries and still has many more exciting brownfield exploration opportunities in Peru and Mexico that are within close proximity to the existing mines. Additionally, the Company has large land packages at each of its mines with several prospective regional targets providing longer-term exploration upside and mineral resource growth potential.

Forward-Looking Statements

This news release contains forward-looking information within the meaning of Canadian securities legislation. Forward-looking information relates to future events or the anticipated performance of Sierra and reflect management's expectations or beliefs regarding such future events and anticipated performance based on an assumed set of economic conditions and courses of action. In certain cases, statements that contain forward-looking information can be identified by the use of words such as "plans", "expects", "is expected", "budget", "scheduled", "estimates", "forecasts", "intends", "anticipates", "believes" or variations of such words and phrases or statements that certain actions, events or results "may", "could", "would", "might", or "will be taken", "occur" or "be achieved" or the negative of these words or comparable terminology. Forward-looking information in this news release includes, without limitation, statements regarding: the expectation that Alpayana will increase the Hostile Bid, the intention of the board of directors to provide an update regarding the Hostile Bid and management's expectations with respect to additional alternatives. By its very nature forward-looking information involves known and unknown risks, uncertainties and other factors that may cause actual performance of Sierra to be materially different from any anticipated performance expressed or implied by such forward-looking information.

Forward-looking information is subject to a variety of risks and uncertainties, which could cause actual events or results to differ from those reflected in the forward-looking information, including, without limitation, the risks described under the heading "Risk Factors" in the Company's annual information form dated March 26, 2025 for its fiscal year ended December 31, 2024 and other risks identified in the Company's filings with Canadian securities regulators, which are available at www.sedarplus.ca.

The risk factors referred to above are not an exhaustive list of the factors that may affect any of the Company's forward-looking information. Forward-looking information includes statements about the future and is inherently uncertain, and the Company's actual achievements or other future events or conditions may differ materially from those reflected in the forward-looking information due to a variety of risks, uncertainties and other factors. The Company's statements containing forward-looking information are based on the beliefs, expectations, and opinions of management on the date the statements are made, and the Company does not assume any obligation to update such forward-looking information if circumstances or management's beliefs, expectations or opinions should change, other than as required by applicable law. For the reasons set forth above, one should not place undue reliance on forward-looking information.

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For further information regarding Sierra, please visit www.SierraMetals.com or contact:

Investor Relations

Sierra Metals Inc.

+1 (866) 721-7437

info@sierrametals.com

Securityholder Communications Advisor

Christine Carson

President & CEO

Carson Proxy Advisors

+1 (416) 804-0825

christine@carsonproxy.com

Media Relations

John Vincic

Principal

Oakstrom Advisors

+1 (647) 402-6375

john@oakstrom.com

Source: Sierra Metals Inc.