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

Date of Report (Date of earliest event reported): May 17, 2017

Power Solutions International, Inc.

(Exact name of registrant as specified in its charter)

201 Mittel Drive, Wood Dale, Illinois 60191

(Address of principal executive offices and zip code)

Registrant’s telephone number, including area code: (630) 350-9400

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 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

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

On May 22, 2017, Power Solutions International, Inc. (the “Company”) filed with the Securities and Exchange Commission (the “SEC”) its original Current Report on Form 8-K (the “Original Form 8-K”) to report, among other things, that on May 17, 2017, the Company’s Board of Directors (the “Board”) appointed John P. Miller as chief executive officer and president of the Company. As contemplated in the Original Form 8-K, this Form 8-K/A amends the Original Form 8-K to summarize and file as an exhibit the employment agreement, dated as of June 15, 2017 (the “Employment Agreement”) by and between Mr. Miller and the Company.

Employment Agreement with John P. Miller

On June 15, 2017, the Company entered into the Employment Agreement with John P. Miller, the chief executive officer and president of the Company, which finalized the terms of his employment with the Company. The Employment Agreement provides that Mr. Miller’s employment is “at will” and may be terminated at any time by either party. The Employment Agreement provides for (i) an annual base salary of $360,000, subject to increase from time to time and (ii) eligibility to receive an annual bonus at a target amount equal to 60% of his base salary based on the attainment of certain performance goals and objectives in connection with the Company’s key performance indicator plan. In connection with his employment, Mr. Miller was awarded 36,000 shares of restricted stock which vest in equal one-half increments on the first and second anniversary of the May 31, 2017 grant date established in the award agreement.

In the event that Mr. Miller’s employment is terminated by the Company without Cause (as defined in the Employment Agreement) during the employment term, he will be entitled to receive, among other things, (i) severance equal to base salary for 12 months and (ii) any unpaid previously awarded bonus related to the prior fiscal year. The Employment Agreement restricts Mr. Miller from competing with the Company during the term of the agreement and for one year after termination of his employment with the Company. The Employment Agreement also restricts Mr. Miller from soliciting the Company’s customers or employees during the term of the agreement and for one year after termination of his employment with the Company.

The foregoing description of the Employment Agreement is qualified in its entirety by reference to the complete text of the Employment Agreement, which is filed as Exhibit 10.1 to this Current Report on Form 8-K/A and incorporated by reference herein.

(d) Exhibits.

2

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.

Dated: June 21, 2017

EXHIBIT INDEX