Ero Copper Announces Closing of Over-Allotment Option

November 1, 2017

NOT FOR DISTRIBUTION IN THE UNITED STATES

Vancouver, Canada (November 1, 2017) - Ero Copper Corp. ("Ero" or the "Company ") (TSX: ERO) is pleased to announce that, further to its successfully completed initial public offering and secondary offering (together, the " Offering") of an aggregate of 23,282,116 common shares of Ero at a price of CDN$4.75 per common share, the underwriters have purchased an additional 3,492,317 common shares pursuant to their exercise in full of the over-allotment option (the " Over-Allotment Option") granted by Ero, generating additional gross proceeds to Ero of CDN$16,588,505.75.

The common shares of Ero are listed on the Toronto Stock Exchange under the symbol "ERO". With the closing of the Over-Allotment Option, there are 74,598,028 common shares of Ero issued and outstanding.

The Offering was managed by a syndicate of underwriters, including BMO Capital Markets and Scotiabank as lead joint bookrunners and Canaccord Genuity Corp., GMP Securities L.P., Numis Securities Limited, PI Financial Corp. and Raymond James Ltd.

No securities regulatory authority has either approved or disapproved of the contents of this news release. The common shares have not been and will not be registered under the United States Securities Act of 1933, as amended (the "U.S. Securities Act") or any state securities laws. Accordingly, the common shares may not be offered or sold within the United States unless registered under the U.S. Securities Act and applicable state securities laws or pursuant to exemptions from the registration requirements of the

U.S. Securities Act and applicable state securities laws. This news release does not constitute an offer to sell or a solicitation of an offer to buy any securities of Ero in any jurisdiction in which such offer, solicitation or sale would be unlawful.

About Ero

Ero is a base metals mining company focused on the production and sale of copper from the Vale do Curaçá Property in Brazil, with gold and silver produced and sold as by-products from the Vale do Curaçá Property. Additional information on the Company and its operations can be found atwww.erocopper.com and on SEDAR (www.sedar.com).

Contact:

Investor Inquiries:

Makko DeFilippo, Vice President, Corporate Development
(604)-449-9244
info@erocopper.com

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