strl-20260408 FALSE 0000874238 0000874238 2026-04-08 2026-04-08

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): April 8, 2026

STERLING INFRASTRUCTURE, INC.
(Exact name of registrant as specified in its charter)

Delaware 001-31993 25-1655321
(State or other jurisdiction of incorporation
or organization) (Commission File Number) (I.R.S. Employer
Identification No.)

1800 Hughes Landing Blvd.
The Woodlands , Texas
 
77380

(Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code:   ( 281 ) 214-0777

Securities registered pursuant to Section 12(b) of the Act:
Common Stock, $0.01 par value per share STRL The NASDAQ Stock Market LLC
(Title of Class) (Trading Symbol) (Name of each exchange on which registered)

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:
☐ 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))

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

Item 7.01      Regulation FD Disclosure.

On April 8, 2026, Sterling Infrastructure, Inc. (“Sterling”) released its 2026 Sustainability Report. The 2026 Sustainability Report is attached hereto as Exhibit 99.1 and can also be found on Sterling's corporate website at www.strlco.com/sustainability.

The information provided in this Item 7.01 shall not be deemed to be “filed” for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section, unless the registrant specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act, other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.

Item 9.01      Financial Statements and Exhibits.
(d)      Exhibits

Exhibit Number Description

99.1 2026 Sustainability Report

104 Cover Page Interactive Data File (embedded within the Inline XBRL document)

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.

  STERLING INFRASTRUCTURE, INC.
     
Date: April 8, 2026 By: /s/ Nicholas Grindstaff
    Nicholas Grindstaff
    Chief Financial Officer