ERO.TO · 2026-03-30 12:00:00

Ero Files Technical Report for the Furnas Copper-Gold Project

Technical Reports (NI 43-101)

March 30, 2026

Vancouver, British Columbia – Ero Copper Corp. (TSX: ERO, NYSE: ERO) ("Ero" or the

“Company”) is pleased to announce the filing of a Technical Report in relation to the

Preliminary Economic Assessment ("PEA") for the Furnas Copper-Gold Project, located in the

Carajás Mineral Province in Pará State, Brazil.

The Technical Report was prepared in accordance with the Canadian Securities

Administrator’s National Instrument 43-101 – Standards of Disclosure for Mineral Projects

and supports the disclosure outlined in Ero's news release dated February 23, 2026. The

Technical Report 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 filed 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, B.C., the Company operates two copper mines

– the Caraíba Operations in Bahia State and the Tucumã Operation in Pará 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

Carajás Province in Pará State, through a definitive earn-in agreement with Vale Base Metals

to acquire a 60% 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 (www.ero.com),

SEDAR+ (www.sedarplus.ca), and on EDGAR (www.sec.gov).

FOR MORE INFORMATION, PLEASE CONTACT

Farooq Hamed, VP, Investor Relations

[email protected]

TSX: ERO

NYSE: ERO

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CAUTION REGARDING FORWARD LOOKING INFORMATION AND STATEMENTS

This press release contains “forward-looking statements” within the meaning of the United States Private Securities Litigation Reform Act of 1995 and “forward-looking information” within the meaning of

applicable Canadian securities legislation (collectively, “forward-looking statements”). Forward-looking statements include statements that use forward-looking terminology such as “may”, “could”,

“would”, “will”, “should”, “intend”, “target”, “plan”, “expect”, “budget”, “estimate”, “forecast”, “schedule”, “anticipate”, “believe”, “continue”, “potential”, “view” or the negative or grammatical variation thereof

or other variations thereof or comparable terminology. Forward-looking statements may include, but are not limited to, statements with respect to 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 could cause actual results, actions, events, conditions, performance or achievements to

materially differ from those expressed or implied by the forward-looking statements, including, without limitation, 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 may affect any of the Company’s forward-looking statements.

Although the Company has attempted to identify important factors that could cause actual results, actions, events, conditions, performance or achievements to differ materially from those contained in

forward-looking statements, there may be other factors that cause results, actions, events, conditions, performance or achievements to differ from those anticipated, estimated or intended.

Forward-looking statements are not a guarantee 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 involve statements about the future and are inherently uncertain, and the Company’s actual results, achievements or other

future events or conditions may differ materially from those reflected in the forward-looking statements due to a variety of risks, uncertainties and other factors, including, without limitation, those referred

to herein and in the AIF under the heading “Risk Factors”.

The Company’s forward-looking statements are based on the assumptions, beliefs, expectations and opinions of management on the date the statements are made, many of which may be difficult to

predict and beyond the Company’s control. In connection with the forward-looking statements contained in this press release and in the AIF, the Company has made certain assumptions about, among other

things: favourable equity and debt capital markets; the ability to raise any 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 metal prices; the timing and results of exploration and drilling programs; the accuracy of any mineral reserve and mineral resource estimates;

the geology of the Caraíba Operations, the Xavantina Operations, the Tucumã Operation and the Furnas Copper-Gold Project being 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 commodities such as fuel; future currency exchange rates, interest rates and

tariff rates; operating conditions being favourable such that the Company is able to operate in a safe, efficient and effective manner; work force continuing to remain healthy in the face of prevailing

epidemics, pandemics or other health risks, political and regulatory stability; the receipt of governmental, regulatory and third party approvals, licenses and permits on favourable terms; obtaining required

renewals for existing approvals, licenses and permits on favourable terms; requirements under applicable laws; sustained labour stability; stability in financial and capital goods markets; availability of

equipment; positive relations with local groups and the Company’s ability to meet its obligations under its agreements with such groups; and satisfying the terms and conditions of the Company’s current

loan arrangements. 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, conditions, results,

performance or achievements to be materially different 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.

TSX: ERO

NYSE: ERO

2 Ero

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