Ero Files technical report for the Xavantina operations

Ero Copper Corp. (TSX: ERO, NYSE: ERO) (“Ero” or the “Company”) is pleased to announce the filing of its technical report for the Xavantina operations related to the update to its National Instrument 43-101 compliant mineral reserve and resource estimate previously announced on November 4, 2025.

The technical report has been 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 (www.ero.com) and on SEDAR+ (www.sedarplus.ca). A copy of the technical report will also be archived on EDGAR (www.sec.gov).

ABOUT ERO

Ero is a Brazil-focused, growth-oriented mining company with a diversified portfolio of copper and gold assets. Headquartered in Vancouver, BC, the company operates two copper mines – the Caraíba operation in the state of Bahia and the Tucumã operation in the state of Pará – as well as the Xavantina Operations, a producing gold mine in the state of Mato Grosso. In addition to its assets, Ero is advancing the Furnas Copper-Gold Project, located in the mineral-rich province of Carajás in the state of Pará, through a definitive earn-in agreement with Vale Base Metals to acquire a 60% interest in the project.

Ero’s corporate philosophy is based on a commitment to safety, operational excellence and the responsible production of minerals essential for a better future. 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 activities and projects, is available on the company’s website (www.ero.com), CONSCIOUS+ (www.sedarplus.ca), and on EDGAR (www.sec.gov).

FOR MORE INFORMATION PLEASE CONTACT US

Farooq Hamed, Vice President of Investor Relations
info@ero.com

CAUTIONARY NOTE REGARDING FORWARD-LOOKING INFORMATION AND STATEMENTS

This press release contains “forward-looking statements” within the meaning of the U.S. Private Securities Litigation Reform Act of 1995 and “forward-looking information” within the meaning of applicable Canadian securities laws (collectively, “forward-looking statements”). Forward-looking statements include statements that use forward-looking terminology such as “may”, “could”, “would”, “will”, “should”, “intend”, “goal”, “plan”, “expect”, “budget”, “estimate”, “predict”, “plan”, “anticipate”, “believe”, “continue”, “potential”, “see” or the negative or grammatical variation thereof or other variations thereof or similar terminology. Forward-looking statements may include, but are not limited to, statements regarding the future filing of the Technical Report.

Forward-looking statements are subject to a variety of known and unknown risks, uncertainties and other factors that may cause actual results, actions, events, circumstances, performance or achievements to differ materially from those expressed or implied by the forward-looking statements, including, but not limited to, the risks discussed in this press release and in the Company’s most recent annual information form (“AIF”) under the heading “Risk Factors”. The risks discussed in this press release and in the AIF are not exhaustive of the factors that could affect the company’s forward-looking statements. Although the Company has attempted to identify important factors that could cause actual results, actions, events, circumstances, performance or achievements to differ materially from those expressed in forward-looking statements, there may be other factors that cause results, actions, events, circumstances, performance or achievements to differ from those anticipated, estimated or intended.

Forward-looking statements are not guarantees of future performance. There can be no assurance that forward-looking statements will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Forward-looking statements include statements about the future and are inherently uncertain, and the Company’s actual results, performance or other future events or conditions may differ materially from those reflected in the forward-looking statements as a result of a variety of risks, uncertainties and other factors, including but not limited to those referred to herein and in the AIF under the heading “Risk Factors”.

The Company’s forward-looking statements are based on management’s assumptions, beliefs, expectations and opinions on the date the statements are made. Many of these can be difficult to predict and are beyond the company’s control. In connection with the forward-looking statements in this press release and in the AIF, the Company has made certain assumptions about, among other things: favorable equity and debt capital markets; the ability to raise necessary additional capital on reasonable terms to advance the production, development and exploration of the Company’s properties and assets; future prices of copper, gold and other metals; the timing and results of exploration and drilling programs; the accuracy of estimates of mineral reserves and mineral resources; the geology of the Caraíba operations, the Xavantina operations, the Tucumã operation and the Furnas Copper-Gold Project as described in the respective technical report for each property; production costs; the accuracy of budgeted exploration, development and construction costs and expenditures; the price of other raw materials such as fuel; future exchange rates, interest rates and tariffs; the operating conditions are such that the Company can operate in a safe, efficient and effective manner; the workforce remains healthy despite prevailing epidemics, pandemics or other health risks, and political and regulatory stability; the receipt of approvals, licenses and permits from government, regulatory authorities and third parties on favorable terms; obtaining required extensions for existing approvals, licenses and permits on favorable terms; requirements under applicable law; sustainable labor stability; stability in the markets for financial and capital goods; availability of equipment; positive relationships with local groups and the Company’s ability to meet its obligations under its agreements with such groups; and meeting the terms of the Company’s current loan agreements. Although the Company believes that the assumptions inherent in forward-looking statements are reasonable as of the date of this press release, these assumptions are subject to significant business, social, economic, political, regulatory, competitive and other risks and uncertainties, contingencies and other factors that could cause actual actions, events, circumstances, results, performance or achievements to differ materially from those projected in the forward-looking statements. The company cautions that the foregoing list of assumptions is not exhaustive. Other events or circumstances could cause actual results to differ materially from those estimated or projected and expressed in, or implied by, the forward-looking statements contained in this press release. There can be no assurance that forward-looking statements will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance on forward-looking statements.

Forward-looking statements contained herein are made as of the date of this press release and the Company disclaims any obligation to update or revise any forward-looking statement, whether as a result of new information, future events or results or otherwise, except as and to the extent required by applicable securities laws.