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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

August 25, 2026

Date of Report (Date of earliest event reported)

Primoris Services Corporation

(Exact name of Registrant as specified in its charter)

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2300 N. Field Street, Suite 1900, Dallas, Texas 75201

(Address of principal executive offices)

(Zip Code)

(214) 740-5600

Registrant’s telephone number, including area code

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):

☐             Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐             Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐             Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐             Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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

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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).

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Emerging growth company ☐

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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. ☐

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Item 5.02Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

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Committee Assignments

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This Form 8-K/A amends the Form 8-K filed by Primoris Services Corporation (the “Company”) on August 31, 2026, (the “Original Filing”) related to the appointment of James A. Greer and Oscar K. Brown to the Company’s Board of Directors (the “Board”) effective October 1, 2026; such disclosure is incorporated herein by reference in its entirety. At the time of the Original Filing, Mr. Greer’s and Mr. Brown’s Board committee assignments had not been determined. In accordance with Instruction 2 to Item 5.02 of Form 8-K, the sole purpose of this amendment is to disclose committee assignments for Mr. Greer and Mr. Brown. On October 30, 2026, the Board appointed Mr. Greer to serve on the Board’s Strategy and Risk Committee and Mr. Brown to serve on the Board’s Compensation Committee, effective immediately. No other changes have been made to the Original Filing.

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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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