Ms. Courtney Lynn reports

ERO COPPER ANNOUNCES VOTING RESULTS OF ANNUAL GENERAL MEETING OF SHAREHOLDERS

Ero Copper Corp. has released the voting results from its annual general meeting of shareholders held today in Vancouver, B.C. A total of 93,474,205 common shares were represented at the meeting, being 90.96 per cent of the issued and outstanding common shares of the company as at the March 5, 2024, record date. Shareholders voted in favour of all items of business before the meeting, including the re-election of management's nominees as directors for the ensuing year and the advisory vote on executive compensation. Detailed results of the votes are presented herein.

Each item of business voted upon at the meeting is described in detail in the company's management information circular dated March 7, 2024, which is available on the company's website, on SEDAR+ and on EDGAR.

Set the number of directors at 10

Shareholders approved the proposal to set the number of directors at 10 with 99.99 per cent of votes cast in favour.

Appointment of auditor

Shareholders reappointed KPMG LLP, chartered professional accountants, as the auditor of the company and authorized the directors of the company to fix the remuneration to be paid to the auditor with 99.95 per cent of votes cast in favour.

Advisory vote on executive compensation

Shareholder approved the non-binding advisory say on pay resolution accepting the company's approach to executive compensation as described in the circular with 99.05 per cent of votes cast in favour.

About Ero Copper Corp.

Ero is a high-margin, high-growth, low-carbon-intensity 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 S.A. (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-type (iron ore, copper and gold) copper project located in Para, Brazil. The company also owns 97.6 per cent of NX Gold S.A., which owns the Xavantina operations (formerly known as the NX gold mine), comprising an operating gold and silver mine located in Mato Grosso, Brazil. Additional information on the company and its operations, including technical reports on the Caraiba operations, Xavantina operations and Tucuma project, can be found on SEDAR+ and on EDGAR. The company's shares are publicly traded on the Toronto Stock Exchange and the New York Stock Exchange under the symbol ERO.