Delisting Notice

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): March 2, 2022     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 3.01. Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing. On March 2, 2022, Arthur J. Gallagher & Co. (the “ Company ”) notified the New York Stock Exchange (the “ NYSE ”) of the Company’s non-compliance with Section 303A.05 of the NYSE Listed Company Manual, which requires that listed companies have a compensation committee composed entirely of independent directors. In the course of conducting its annual governance review, the Company determined that D. John Coldman, a current director of the Company, had entered into an employment agreement to provide advisory services to one of the Company’s UK subsidiaries. As a result, Mr. Coldman does not qualify as an independent director as defined in Section 303A.02 of the NYSE Listed Company Manual. Mr. Coldman has resigned as a member of the Compensation Committee. As a result of this action, the Compensation Committee is now composed entirely of independent directors. Mr. Coldman continues to serve as a member of the Company’s Board of Directors. 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: March 4, 2022       /s/ WALTER D. BAY       Walter D. Bay Vice President, General Counsel and Secretary