Mr. Farooq Hamed reports

ERO FILES TECHNICAL REPORT FOR THE XAVANTINA OPERATIONS

Ero Copper Corp. has filed its technical report for the Xavantina operations, related to the update on its National Instrument 43-101-compliant mineral reserve and resource estimate, previously announced on Nov. 4, 2025.

The technical report was prepared in accordance with the Canadian Securities Administrator's National Instrument 43-101, Standards of Disclosure for Mineral Projects, and can be found on the company's website and on SEDAR+. A copy of the technical report will also be filed on EDGAR.

About Ero Copper Corp.

Ero is a Brazil-focused, growth-oriented mining company with a diversified portfolio of copper and gold assets. Headquartered in Vancouver, B.C., the company operates two copper mines -- the Caraiba operations in Bahia state and the Tucuma operation in Para state -- as well as the Xavantina operations, a producing gold mine in Mato Grosso state. In addition to its operating assets, Ero is advancing the Furnas copper-gold project, located in the mineral-rich Carajas province in Para state, through a definitive earn-in agreement with Vale Base Metals to acquire a 60-per-cent interest in the project.

Ero's operating philosophy is grounded in a commitment to safety, operational excellence and the responsible production of minerals essential for a better tomorrow. The company's shares are publicly traded on the Toronto Stock Exchange and the New York Stock Exchange under the symbol ERO. Additional information, including technical reports on the company's operations and projects, is available on the company's website, SEDAR+ and EDGAR.

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