Shareholder Vote

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): May 13, 2025     ARTHUR J. GALLAGHER & CO. (Exact name of registrant as specified in its charter)       Delaware   1-09761   36-2151613 (State or other jurisdiction of incorporation or organization)   (Commission File Number)   (I.R.S. Employer Identification Number)   2850 W. Golf Road , Rolling Meadows , Illinois   60008-4050 (Address of principal executive offices)   (Zip Code) Registrant’s telephone number, including area code: (630) 773-3800 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, $1.00 par value   AJG   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. ☐       Item 5.07. Submission of Matters to a Vote of Security Holders. Arthur J. Gallagher & Co. (the “ Company ”) held its Annual Meeting of Stockholders on May 13, 2025 (the “ Annual Meeting ”). At the Annual Meeting, the Company’s stockholders (i) elected all ten director nominees, whose names appear below, to serve until the Company’s 2026 Annual Meeting of Stockholders, (ii) approved ratification of the appointment of Ernst & Young LLP as the Company’s Independent Registered Public Accounting Firm for the fiscal year ending December 31, 2025 (“ Auditor Ratification ”), and (iii) approved, on a non-binding advisory basis, the Company’s named executive officers’ compensation (“ Say-on-Pay ”). The final voting results are set forth below:   Election of Directors    For      Against      Abstain      Broker Non-Votes   Sherry Barrat      206,454,344        8,489,745        425,479        14,944,264   Deborah Caplan      211,809,136        3,135,253        425,179        14,944,264   Teresa Clarke      214,366,799        657,966        344,803        14,944,264   John Coldman      211,431,241        3,582,095        356,232        14,944,264   Richard Harries      214,545,924        472,131        351,513        14,944,264   Pat Gallagher      201,137,091        13,961,043        271,434        14,944,264   David Johnson      202,727,559        10,881,147        1,760,862        14,944,264   Chris Miskel      200,626,672        14,418,022        324,874        14,944,264   Ralph Nicoletti      212,362,114        2,672,455        334,999        14,944,264   Norman Rosenthal      208,179,145        6,857,339        333,084        14,944,264          For      Against      Abstain   Auditor Ratification      216,032,271        12,595,217        1,686,344          For      Against      Abstain      Broker Non-Votes   Say-on-Pay      196,469,454        18,518,399        381,715        14,944,264   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.         Arthur J. Gallagher & Co.  Date: May 14, 2025     By:   /s/ Walter D. Bay       Walter D. Bay       Vice President, General Counsel and Secretary