UNITED STATES SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q/A

Amendment No. 1

For the quarterly period ended September 27, 2015

Commission file number: 1-6615

SUPERIOR INDUSTRIES INTERNATIONAL, INC.

(Exact Name of Registrant as Specified in Its Charter)

Registrant’s Telephone Number, Including Area Code: (248) 352-7300

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  þ    No  o

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, 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  þ    No  o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Large Accelerated Filer  o      Accelerated Filer  þ      Non-Accelerated Filer  o      Smaller Reporting Company  o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Yes  o    No  þ

Number of shares of common stock outstanding as of October 29, 2015: 26,292,409

TABLE OF CONTENTS

EXPLANATORY NOTE

This Form 10-Q/A constitutes Amendment No. 1 to the Quarterly Report on Form 10-Q of Superior Industries International, Inc. (the “Company”) for the period ended September 27, 2015, originally filed with the Securities and Exchange Commission (the “SEC”) on November 4, 2015 (the “Original Filing”). We are filing this Amendment No. 1 to our Quarterly Report on Form 10-Q solely to file the Consent and Amendment No. 2 dated as of October 14, 2015 to the Credit Agreement dated as of December 19, 2014, by and among Superior Industries International, Inc., the Lenders from time to time party thereto and JP Morgan Chase Bank, N.A., as Administrator as Exhibit 10.2, which was inadvertently omitted from the Original Filing. This Amendment No. 1 speaks as of the original filing date of the Original Filing and does not reflect events occurring after the filing date of the Original Filing, or modify or update the disclosures therein in any way other than as required to reflect the amendment described above. Additionally, in connection with the filing of this Amendment No. 1, the Company is including new certifications of the Company’s chief executive officer and chief financial officer pursuant to Rule 13a-14(a) of the Exchange Act. The Company is not including certifications pursuant to Section 1350 of Chapter 63 of Title 18 of the United States Code (18 U.S.C. 1350) as no financial statements are being filed with this Amendment No. 1.

Item 6.  Exhibits

*Previously filed.

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.

SUPERIOR INDUSTRIES INTERNATIONAL, INC.

(Registrant)