Ero Copper Corp. — AGM Information 2020

Mar 20, 2020

NOTICE OF ANNUAL GENERAL AND SPECIAL MEETING OF SHAREHOLDERS

NOTICE IS HEREBY GIVEN that the annual general and special meeting (the “ Meeting ”) of the shareholders of ERO COPPER CORP. (the “ Company ” or “ Ero ”) will be held:

When: Where: Thursday, May 7, 2020 Lancaster Room at the Rosewood Hotel Georgia 3:30 p.m. (Vancouver time) 801 West Georgia Street, Vancouver, British Columbia

The following items of business will be covered at the Meeting:

1. receive the audited consolidated financial statements of the Company for the financial year ended December 31, 2019, and the auditor’s report thereon;

2. set the number of directors at nine (9) for the ensuing year;

3. re-elect nine directors to hold office for the ensuing year;

4. reappoint KPMG LLP, Chartered Professional Accountants, as the auditor of the Company for the ensuing year, and authorize the directors to fix the remuneration to be paid to the auditor;

5. ratify, authorize and approve the granting of 8,086 incentive stock options on August 15, 2019 to each of Dr. Sally Eyre and Chantal Gosselin, upon appointment to the Board of Directors of the Company;

6. authorize and approve the Company’s Stock Option Plan, including amendments thereto, and the unallocated options issuable thereunder;

7. authorize and approve the Company’s Share Unit Plan, including amendments thereto, and the unallocated units issuable thereunder;

8. authorize and approve the amendments to the Articles of the Company to increase the quorum requirement for meetings of directors and shareholders;

9. authorize and approve a non-binding advisory “say on pay” resolution accepting the Company’s approach to executive compensation; and

10. transact such other business as may be properly brought before the Meeting.

The accompanying management information circular (the “ Circular ”) provides additional information relating to the matters to be addressed at the Meeting and is deemed to form part of this Notice.

If you owned common shares of Ero as of the close of business on March 10, 2020 (the record date for the Meeting), you are entitled to vote at the Meeting.

Registered shareholders of Ero are entitled to vote at the Meeting either in person or by proxy. Registered Shareholders who are unable to attend the Meeting in person are encouraged to read, complete, sign, date and return the enclosed proxy form in accordance with the instructions set out in the proxy form and in the Circular. In order to be valid for use at the Meeting, proxies must be received by Computershare

Investor Services Inc., Proxy Dept., 100 University Avenue, 8th Floor, Toronto, Ontario, M5J 2Y1 in the envelope provided for that purpose, or vote using the telephone or internet based on instructions provided in the enclosed proxy form no later than 3:30 p.m. (Vancouver time) on May 5, 2020, or in the case of any adjournment or postponement of the Meeting, at least 48 hours (excluding Saturdays, Sundays and holidays), before the Meeting is reconvened. Please advise the Company of any change in your mailing address. The time limit for deposit of proxies may be waived or extended by the Chairman of the Meeting at his discretion, without notice.

If you are a non-registered shareholder of Ero, please refer to the section in the Circular entitled “ Solicitation of Proxies and Voting Instructions ” for information on how to vote your common shares.

DATED at Vancouver, British Columbia, this 12[th] day of March, 2020.

BY ORDER OF THE BOARD OF DIRECTORS

“Christopher Noel Dunn” Executive Chairman