UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): March 7, 2016 (March 2, 2016)

TTM TECHNOLOGIES, INC.

(Exact name of Registrant as specified in its charter)

Registrant’s telephone number, including area code: (714) 327-3000

N/A

(Former name or former address, if changed since last report)

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:

Item 5.03. Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year

On March 2, 2016, the Board of Directors of TTM Technologies, Inc. (the “Company”) approved an amendment to the Company’s Fourth Amended and Restated Bylaws (as amended and restated, the “Bylaws”), effective March 2, 2016. The amendment provides that the Delaware Court of Chancery will be the exclusive forum for adjudication of certain actions and proceedings as set forth in Section 7.8 entitled “Exclusive Forum for Certain Litigation.” These certain actions and proceedings include derivative actions, actions claiming breach of fiduciary duty, actions involving the Delaware General Corporation Law or the Company’s organizational documents, and actions involving the internal affairs legal doctrine.

The foregoing description of the amendment to the Bylaws is only a summary and does not purport to be complete and is qualified in its entirety by reference to the complete text of the Company’s Fourth Amended and Restated Bylaws, as amended, a copy of which is attached as Exhibit 3.2(i) to this report and is incorporated herein by reference.

Item  7.01. Regulation FD Disclosure

On March 7, 2016, the Company issued a press release announcing the principal payment of $74.1 million toward the $950 million Senior Secured Term Loan B that was used to finance the acquisition of Viasystems on May 31, 2015. A copy of the press release is attached as Exhibit 99.1.

Item 9.01. Financial Statements and Exhibits.

The following exhibit is filed herewith:

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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 hereunto duly authorized.

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EXHIBIT INDEX

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