ERO.TO · 2023-05-12 12:00:00

Ero Copper Files Technical Report for the Xavantina Operations

Technical Reports (NI 43-101)

May 12, 2023

Vancouver, British Columbia – 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 increase in mineral reserves and mineral resources and extension of

mine life as previously announced on March 28, 2023.

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 (www.erocopper.com) and on SEDAR

(www.sedar.com). A copy of the Technical Report will also be filed on EDGAR

(www.sec.gov).

ABOUT ERO COPPER CORP

Ero 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% interest

in the Brazilian copper mining company, Mineração Caraíba S.A. ("MCSA"), 100% owner of

the Company's Caraíba Operations (formerly known as the MCSA Mining Complex), which

are located in the Curaçá Valley, Bahia State, Brazil and include the Pilar and Vermelhos

underground mines and the Surubim open pit mine, and the Tucumã Project (formerly known

as Boa Esperança), an IOCG-type copper project located in Pará, Brazil. The Company also

owns 97.6% of NX Gold S.A. ("NX Gold") which owns the Xavantina Operations (formerly

known as the NX Gold Mine), comprised of an operating gold and silver mine located in Mato

Grosso, Brazil. Additional information on the Company and its operations, including technical

reports on the Caraíba Operations, Xavantina Operations and Tucumã Project, can be found

on the Company's website (www.erocopper.com), on SEDAR (www.sedar.com), and on

EDGAR (www.sec.gov). The Company’s shares are publicly traded on the Toronto Stock

Exchange and the New York Stock Exchange under the symbol “ERO”.

TSX: ERO

NYSE: ERO

1 Ero Copper Corp

FOR MORE INFORMATION, PLEASE CONTACT

Courtney Lynn, VP, Corporate Development & Investor Relations

(604) 335-7504

[email protected]

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 Annual Information Form for the

year ended December 31, 2022 and dated March 7, 2023 (the "AIF") under the heading “Risk Factors”.

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 involves 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.

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 Copper Corp

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