UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K/A

CURRENT REPORT

Pursuant to Section 13 OR 15(d)

of the Securities Exchange Act of 1934

December 30, 2016

Date of Report (Date of earliest event reported)

TPI Composites, Inc.

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code: (480) 305-8910

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 §CRF 230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2).

Emerging growth company  ☒

If an emerging growth company, 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.  ☒

Explanatory Note:

TPI Composites, Inc. (“the Company”) is filing this Amendment No. 3 to the Current Report on Form 8-K filed on January 6, 2017 (as amended, the “Original Report”) solely to refile Exhibit 10.2 to the Original Report in response to comments from the Securities and Exchange Commission (the “SEC”) regarding a confidential treatment request submitted to the SEC with respect to Exhibit 10.1 to the Original Report. After due consideration, the Company determined to withdraw its confidential treatment request with the SEC with respect to Exhibit 10.2 and is including herewith an unredacted copy of Exhibit 10.2.

As disclosed in the Original Report, on December 30, 2016, the Company entered into the Amended and Restated Financing Agreement pursuant to which it amended and restated in its entirety the Company’s existing $100.0 million term loan credit facility provided by Highbridge Principal Strategies, LLC as Administrative Agent and Collateral Agent and the lenders from time to time party thereto.

The information set forth in Item 2.02 of the Original Report is incorporated by reference as if fully set forth herein.

The information set forth in Item 7.01 of the Original Report is incorporated by reference as if fully set forth herein.

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.