Endeavour Silver Reports an Illegal Blockade and Suspension of Operations at its Terronera Mine

VANCOUVER, British Columbia, Aug. 16, 2026 (GLOBE NEWSWIRE) — Endeavour Silver Corp. (“Endeavour” or the “Company”) (NYSE: EXK; TSX: EDR) reports that operations at its Terronera mine in Jalisco, Mexico have been temporarily suspended since August 12 th as the result of an illegal blockade by members of the nearby Ejido community regarding their concerns over road maintenance, assistance with medical services and communications, control and access to water supply and increased financial assistance. To date, the blockade has remained peaceful, orderly and respectful.

The site remains staffed with a reduced workforce to support safety and security protocols and continues to be accessible for maintenance activities. The Company continues active discussions with Ejido community leaders to resolve the matter and resume full operations as soon as possible. The Company has the ability to pursue legal action and will exercise all available legal remedies if this matter is prolonged.

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About Endeavour Silver – Endeavour is a mid-tier silver producer with three operating mines in Mexico and Peru and a robust pipeline of exploration projects across Mexico, Chile, and the United States. With a proven track record of discovery, development, and responsible mining, Endeavour is driving organic growth and creating lasting value on its path to becoming a leading senior silver producer.

Contact Information Allison Pettit Vice President, Investor Relations Email: [email protected] Website: www.edrsilver.com

This news release contains “forward-looking statements” within the meaning of the United States private securities litigation reform act of 1995 and “forward-looking information” within the meaning of applicable Canadian securities legislation. Such forward-looking statements and information herein include but are not limited to statements regarding ongoing discussions with community leaders; the exercise of legal remedies; continued accessibility at Terronera; the resolution of the illegal blockade and resumption of full operations at Terronera and related timing; Endeavour’s ability to drive organic growth and create lasting value, and the timing and results of various activities. The Company does not intend to and does not assume any obligation to update such forward-looking statements or information, other than as required by applicable law.

Forward-looking statements or information involve known and unknown risks, uncertainties and other factors that may cause the actual results, level of activity, production levels, performance or achievements of Endeavour and its operations to be materially different from those expressed or implied by such statements. Such factors include but are not limited to unexpected changes in production and costs guidance; the ongoing effects of inflation and supply chain issues on mine economics; fluctuations in the prices of silver and gold; fluctuations in the currency markets (particularly the Mexican peso, Peruvian sol, Canadian dollar, Chilean peso, and U.S.