Ms. Courtney Lynn reports

ERO COPPER FILES TECHNICAL REPORT FOR THE XAVANTINA OPERATIONS

Ero Copper Corp. has filed its technical report for the Xavantina operations related to the increase in mineral reserves and mineral resources and the extension of mine life as previously announced on March 28, 2023.

The technical report was prepared in accordance with the Canadian Securities Administrators' 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 Copper is a high-margin, high-growth, clean copper producer with operations in Brazil and corporate headquarters in Vancouver, B.C. The company's primary asset is a 99.6-per-cent interest in the Brazilian copper mining company, Mineracao Caraiba SA (MCSA), 100-per-cent owner of the company's Caraiba operations (formerly known as the MCSA mining complex), which are located in the Curaca Valley, Bahia state, Brazil, and include the Pilar and Vermelhos underground mines and the Surubim open-pit mine, and the Tucuma project (formerly known as Boa Esperanca), an IOCG (iron oxide copper/gold)-type copper project located in Para, Brazil. The company also owns 97.6 per cent of NX Gold SA, which owns the Xavantina operations (formerly known as the NX gold mine), composed of an operating gold and silver mine located in Mato Grosso, Brazil. The company's shares are publicly traded on the Toronto Stock Exchange and the New York Stock Exchange under the symbol ERO.

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