As filed with the Securities and Exchange Commission on May 9, 2018

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 20-F/A

(Amendment No. 1)

ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d)OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended: December 31, 2017
Commission file number: 001-38256

NEXA RESOURCES S.A.

(Exact name of Registrant as specified in its charter)

Grand Duchy of Luxembourg

(Jurisdiction of incorporation or organization)

Mario Antonio Bertoncini

Senior Vice President Finance and Chief Financial Officer
Phone: +352 26 00 53 43
26-28 rue Edward Steichen
L-2540, Luxembourg
Grand Duchy of Luxembourg
(Address of principal executive offices)

Securities registered or to be registered pursuant to Section 12(b) of the Act:

Title of Each Class	Name of Each Exchange on Which Registered
Common shares, each with par value of US$1.00	New York Stock Exchange

Securities registered or to be registered pursuant to Section 12(g) of the Act: None
Securities for which there is a reporting obligation pursuant to Section 15(d) of the Act: None
The number of outstanding shares of each class of stock of Nexa as of December 31, 2017 was:

133,320,513 common shares, each with par value of US$1.00

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.

Yes o  No x

If this report is an annual or transition report, indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934.

Yes o  No x

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) and (2) has been subject to such filing requirements for the past 90 days.

Yes x  No o

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate website, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).

Yes x  No o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or an emerging growth company. See definition of “accelerated filer,” “large accelerated filer” and “emerging growth company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer o Accelerated filer o Non-accelerated filer x Emerging growth company o

If an emerging growth company that prepares its financial statements in accordance with U.S. GAAP, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Indicate by check mark which basis of accounting the registrant has used to prepare the financial statements included in this filing:

U.S. GAAP o    International Financial Reporting Standards as issued by the International Accounting Standards Board x   Other o

If “Other” has been checked in response to the previous question, indicate by check mark which financial statement item the registrant has elected to follow.

Item 17 o Item 18 o

If this is an annual report, indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Yes o  No x

Explanatory Note

This Amendment No. 1 to the Annual Report on Form 20-F (“Amendment No. 1”) of Nexa Resources S.A. (the “Company”) amends the Company’s Annual Report on Form 20-F for the fiscal year ended December 31, 2017 (the “Original 20-F”), which was filed with the Securities and Exchange Commission on April 30, 2018. The Company is filing this Amendment No. 1 solely for the purposes of adding Exhibit 101 to Item 19 “Exhibits,” which was not included in the Original 20-F, and to furnish the Interactive Data File disclosure as Exhibit 101 in accordance with Rule 405 of Regulation S-T.

Except as described above, this Amendment No. 1 does not amend any information set forth in the Original 20-F, and the Company has not updated disclosures included therein to reflect any events that occurred subsequent to April 30, 2018.

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PART III

ITEM 19. EXHIBITS

Exhibit Number	Description
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document

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SIGNATURES

The registrant hereby certifies that it meets all of the requirements for filing on Form 20-F and that it has duly caused and authorized the undersigned to sign this Amendment No. 1 to the annual report on Form 20-F on its behalf.

NEXA RESOURCES S.A.
By:	/s/ Tito Botelho Martins Junior
	Name:	Tito Botelho Martins Junior
	Title:	Chief Executive Officer

By:	/s/ Mario Antonio Bertoncini
	Name: Mario Antonio Bertoncini
	Title:   Senior Vice President Finance and Chief Financial Officer

Date: May 9, 2018

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