flr-20260730 0001124198 false 0001124198 2026-07-30 2026-07-30 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 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): July 30, 2026 FLUOR CORPORATION (Exact name of registrant as specified in its charter) Delaware 001-16129 33-0927079 (State or other jurisdiction of incorporation or organization) (Commission File Number) (IRS Employer Identification Number) 6700 Las Colinas Blvd. Irving, Texas 75039 (Address of principal executive offices) (Zip Code) Registrant’s telephone number, including area code ( 469 ) 398-7000 Not Applicable (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: ☐ 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)) Securities registered pursuant to Section 12(b) of the Act: Title of each class Trading Symbol(s) Name of each exchange on which registered Common Stock, $.01 par value per share FLR New York Stock Exchange 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. o Item 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers. On July 30, 2026, the Board of Directors (the “Board”) of Fluor Corporation (the “Corporation”) voted to increase the size of the Board to eleven members, effective August 4, 2026. The Board elected Admiral James F. Caldwell Jr., U.S. Navy (retired) to fill the new position authorized by the Board, effective August 4, 2026. Admiral Caldwell has been appointed a member of the Board’s Audit Committee and Governance Committee, effective August 4, 2026. The Board has affirmatively determined that Admiral Caldwell is independent of the Corporation and its management under New York Stock Exchange listing standards and the standards set forth in the Corporation’s Corporate Governance Guidelines. Admiral Caldwell will receive the standard compensation amounts payable to non-employee directors of the Corporation, as described in Exhibit 10.25 filed with the Corporation’s Annual Report on Form 10-K filed on February 17, 2026. In connection with Admiral Caldwell’s election, the Corporation and Admiral Caldwell will enter into the form of indemnification agreement filed as Exhibit 10.21 with the Corporation’s Annual Report on Form 10-K filed on February 25, 2009. 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. Date: August 4, 2026 FLUOR CORPORATION By: /s/ Kevin B. Hammonds Kevin B. Hammonds Chief Legal Officer and Corporate Secretary 3

Fluor Corporation expanded its Board of Directors from ten to eleven members by electing Admiral James F. Caldwell Jr. (retired U.S. Navy) effective August 4, 2026. This board expansion adds military and leadership expertise while maintaining NYSE independence standards.

On July 30, 2026, Fluor Corporation's Board of Directors voted to expand the Board to eleven members, with the change effective August 4, 2026. They elected Admiral James F. Caldwell Jr. (retired U.S. Navy) to fill the newly created position. Admiral Caldwell will also serve on the Audit Committee and Governance Committee starting on the same date. The Board confirmed his independence in accordance with New York Stock Exchange standards. Admiral Caldwell will receive the standard compensation for non-employee directors, further enhancing the Board's expertise with his military and leadership experience.

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