Ero Copper (TSX: ERO) ties Xavantina technical report to S-8 and F-10

Rhea-AI Filing Summary

Ero Copper Corp. submitted a foreign issuer report for December 2025 that primarily serves an administrative purpose. The company states that Exhibits 99.1 and 99.2 to this report are incorporated by reference into its existing Registration Statement on Form S-8 (File No. 333-264821) and its Registration Statement on Form F-10 (File No. 333-274097). Exhibit 99.1 is a press release dated December 19, 2025, and Exhibit 99.2 is a technical report on the Xavantina Operations in Mato Grosso, Brazil.

Form 6-K: How Foreign Companies Report to the SEC →

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

Form 6-K

Report of Foreign Private Issuer
Pursuant to Rule 13a-16 or 15d-16
under the Securities Exchange Act of 1934

For the month of December 2025

Commission File Number: 001-40459

Ero Copper Corp.
(Translation of registrant's name into English)

625 Howe Street, Suite 1050
Vancouver, British Columbia V6C 2T6
Canada
(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:

Form 20-F [   ]      Form 40-F [ X ]

Exhibits 99.1 and 99.2 of this Form 6-K are incorporated by reference as additional exhibits to the registrant’s Registration Statement on Form S-8 (File NO. 333-264821) and Registration Statement on Form F-10 (File NO. 333-274097).

Signatures

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	Ero Copper Corp.
Date: December 19, 2025	By:	/s/ Deepk Hundal
		Name: Deepk Hundal
		Title: Executive Vice President, General Counsel and Corporate Secretary

EXHIBIT INDEX

Exhibit Number		Description
99.1		Press Release dated December 19, 2025
99.2		Technical Report on the Xavantina Operations, Mato Grosso, Brazil

FAQ

What does Ero Copper Corp. (ERO) report in this December 2025 Form 6-K?

The report indicates that Exhibits 99.1 and 99.2 are being filed and incorporated by reference into Ero Copper Corp.’s existing Form S-8 and Form F-10 registration statements.

Which registration statements are affected for Ero Copper Corp. (ERO)?

The filing incorporates Exhibits 99.1 and 99.2 into Ero Copper Corp.’s Registration Statement on Form S-8 (File No. 333-264821) and Registration Statement on Form F-10 (File No. 333-274097).

What is Exhibit 99.1 in Ero Copper Corp.’s December 2025 Form 6-K?

Exhibit 99.1 is a press release dated December 19, 2025 filed by Ero Copper Corp.

What is Exhibit 99.2 in the Ero Copper Corp. (ERO) Form 6-K?

Exhibit 99.2 is a Technical Report on the Xavantina Operations, located in Mato Grosso, Brazil.

Does the Ero Copper Corp. (ERO) Form 6-K include financial results?

No financial tables or earnings data are included in the provided portion; it mainly lists the incorporation of a press release and a technical report into existing registration statements.

Under which form does Ero Copper Corp. file its annual reports?

Ero Copper Corp. indicates that it files annual reports under cover of Form 40-F.