Mr. Dan Dickson reports

ENDEAVOUR SILVER ANNOUNCES COMMERCIAL PRODUCTION AT TERRONERA

Endeavour Silver Corp. has achieved commercial production at the Terronera mine located in Jalisco state, Mexico, effective Oct. 1, 2025.

The declaration of commercial production at Terronera comes after a successful commissioning phase during which both mining and processing operations were ramped up to consistently exceed an average of 90 per cent of the designed nameplate capacity of 2,000 tonnes per day, while also achieving at least 90 per cent of the projected metal recoveries.

Terronera has demonstrated remarkable progress, operating for 100 days since July 1, 2025, with eight days of downtime and has sustained strong metal recoveries since mid-August. This achievement marks an important milestone that positions Endeavour for continued growth and long-term success.

"Bringing Terronera into commercial production marks a huge milestone for Endeavour Silver and represents a truly transformational moment in our company's history," said Dan Dickson, chief executive officer. "This achievement not only reinforces our commitment to sustainable growth but also positions Endeavour as a leading mid-tier silver producer with a solid foundation for future expansion."

The company forecasts throughput of approximately 360,000 tonnes over the next six months, with average grades estimated at 122 grams per tonne silver and 2.52 g/t gold. Higher-grade zones are scheduled to be accessed by mid-2026, which is expected to further enhance production. Management plans to issue annualized 2026 production and cost guidance for the Terronera mine in January, 2026.

Stakeholders are invited to take a closer look at Terronera and the work the team has accomplished.

About Endeavour Silver Corp.

Endeavour is a mid-tier silver producer with four operating mines in Mexico and Peru and a robust pipeline of exploration projects across Mexico, Chile and the United States. With a proven 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.

Qualified person

The scientific and technical information contained in this news release has been reviewed and approved by Don Gray, SME-RM, chief operating officer, a qualified person as defined under National Instrument 43-101.

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