AJG

ajg-20260730

0000354190false00003541902026-07-302026-07-30

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

July 30, 2026

Date of Report: (Date of earliest event reported)

ARTHUR J. GALLAGHER & CO.

(Exact name of registrant as specified in its charter)

Delaware1-0976136-2151613

(State or other jurisdiction of incorporation or organization)(Commission File Number)(I.R.S. Employer Identification Number)

2850 Golf Road, Rolling Meadows, Illinois 60008, (630) 773-3800

(Address, including zip code and telephone number, including area code, of registrant’s principal executive offices)

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 classTrading Symbol(s)Name of each exchange on which registered

Common Stock, $1.00 par valueAJGNew 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 2.02.   Results of Operations and Financial Condition

On July 30, 2026, Arthur J. Gallagher & Co. (the Company) issued a press release setting forth the Company’s financial results for the quarter ended June 30, 2026 (the Earnings Release). A copy of the Earnings Release is attached hereto as Exhibit 99.1.

Item 7.01.   Regulation FD Disclosure

In connection with the filing of the Earnings Release, the Company made materials entitled “Supplemental Quarterly Data” and “CFO Commentary” available through the investor relations page of its website. The CFO Commentary includes certain estimates relating to 2026 and other future results.

Item 9.01.   Financial Statements and Exhibits

99.1 Press release, dated July 30, 2026, issued by Arthur J. Gallagher & Co.

104The cover page from this Current Report on Form 8-K, formatted in Inline XBRL.

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: July 30, 2026By: /s/ Douglas K. Howell

Douglas K. Howell

Vice President and Chief Financial Officer

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8-K

false 0000354190 0000354190 2026-01-29 2026-01-29

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 January 29, 2026 Date of Report: (Date of earliest event reported)

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 Golf Road, Rolling Meadows, Illinois 60008, (630) 773-3800 (Address, including zip code and telephone number, including area code, of registrant’s principal executive offices) 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 2.02. Results of Operations and Financial Condition

On January 29, 2026, Arthur J. Gallagher & Co. (the Company) issued a press release setting forth the Company’s financial results for the quarter ended December 31, 2025 (the Earnings Release). A copy of the Earnings Release is attached hereto as Exhibit 99.1.

Item 7.01. Regulation FD Disclosure

In connection with the filing of the Earnings Release, the Company made materials entitled “Supplemental Quarterly Data” and “CFO Commentary” available through the investor relations page of its website. The CFO Commentary includes certain estimates relating to 2026 and other future results.

Item 9.01. Financial Statements and Exhibits

99.1

Press release, dated January 29, 2026, issued by Arthur J. Gallagher & Co.

104

The cover page from this Current Report on Form 8-K, formatted in Inline XBRL.

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: January 29, 2026

By:

/s/ Douglas K. Howell

Douglas K. Howell Vice President and Chief Financial Officer

8-K

false 0000354190 0000354190 2025-10-30 2025-10-30

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 October 30, 2025 Date of Report: (Date of earliest event reported)

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 Golf Road, Rolling Meadows, Illinois 60008, (630) 773-3800 (Address, including zip code and telephone number, including area code, of registrant’s principal executive offices) 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 2.02. Results of Operations and Financial Condition

On October 30, 2025, Arthur J. Gallagher & Co. (the Company) issued a press release setting forth the Company’s financial results for the quarter ended September 30, 2025 (the Earnings Release). A copy of the Earnings Release is attached hereto as Exhibit 99.1.

Item 7.01. Regulation FD Disclosure

In connection with the filing of the Earnings Release, the Company made materials entitled “Supplemental Quarterly Data” and “CFO Commentary” available through the investor relations page of its website. The CFO Commentary includes certain estimates relating to 2025 and other future results.

Item 9.01. Financial Statements and Exhibits

99.1 Press release, dated October 30, 2025, issued by Arthur J. Gallagher & Co.

104 The cover page from this Current Report on Form 8-K, formatted in Inline XBRL.

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: October 30, 2025

By:

/s/ Douglas K. Howell

Douglas K. Howell Vice President and Chief Financial Officer

8-K

false 0000354190 0000354190 2025-07-31 2025-07-31

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 July 31, 2025 Date of Report: (Date of earliest event reported)

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 Golf Road, Rolling Meadows, Illinois 60008, (630) 773-3800 (Address, including zip code and telephone number, including area code, of registrant’s principal executive offices) 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 2.02. Results of Operations and Financial Condition

On July 31, 2025, Arthur J. Gallagher & Co. (the Company) issued a press release setting forth the Company’s financial results for the quarter ended June 30, 2025 (the Earnings Release). A copy of the Earnings Release is attached hereto as Exhibit 99.1.

Item 7.01. Regulation FD Disclosure

In connection with the filing of the Earnings Release, the Company made materials entitled “Supplemental Quarterly Data” and “CFO Commentary” available through the investor relations page of its website. The CFO Commentary includes certain estimates relating to 2025 and other future results.

Item 9.01. Financial Statements and Exhibits

99.1 Press release, dated July 31, 2025, issued by Arthur J. Gallagher & Co.

104 The cover page from this Current Report on Form 8-K, formatted in Inline XBRL.

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: July 31, 2025

By:

/s/ Douglas K. Howell

Douglas K. Howell Vice President and Chief Financial Officer

8-K

false 0000354190 0000354190 2025-05-01 2025-05-01

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 May 1, 2025 Date of Report: (Date of earliest event reported)

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 Golf Road, Rolling Meadows, Illinois 60008, (630) 773-3800 (Address, including zip code and telephone number, including area code, of registrant’s principal executive offices) 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 2.02. Results of Operations and Financial Condition

On May 1, 2025, Arthur J. Gallagher & Co. (the Company) issued a press release setting forth the Company’s financial results for the quarter ended March 31, 2025 (the Earnings Release). A copy of the Earnings Release is attached hereto as Exhibit 99.1.

Item 7.01. Regulation FD Disclosure

In connection with the filing of the Earnings Release, the Company made materials entitled “Supplemental Quarterly Data” and “CFO Commentary” available through the investor relations page of its website. The CFO Commentary includes certain estimates relating to 2025 and other future results.

Item 9.01. Financial Statements and Exhibits

99.1

Press release, dated May 1, 2025, issued by Arthur J. Gallagher & Co.

104

The cover page from this Current Report on Form 8-K, formatted in Inline XBRL.

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 1, 2025

By:

/s/ Douglas K. Howell

Douglas K. Howell

Vice President and Chief Financial Officer

8-K

false 0000354190 --12-31 0000354190 2025-01-29 2025-01-29

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 January 29, 2025 Date of Report: (Date of earliest event reported)

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 Golf Road, Rolling Meadows, Illinois 60008, (630) 773-3800 (Address, including zip code and telephone number, including area code, of registrant’s principal executive offices) 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 2.02. Results of Operations and Financial Condition

On January 30, 2025, Arthur J. Gallagher & Co. (the Company) issued a press release setting forth the Company’s financial results for the quarter and full year ended December 31, 2024 (the Earnings Release). A copy of the Earnings Release is attached hereto as Exhibit 99.1.

Item 5.03. Amendments to Articles of Incorporation or Bylaws; Change in Fiscal year.

On January 29, 2025, the Board of Directors (the Board) of the Company approved and adopted amended and restated bylaws, effective immediately, to reflect the amendments summarized below (as so amended and restated, the Amended and Restated Bylaws). Among other things, the amendments effected by the Amended and Restated Bylaws: (i) clarified who can serve as chairman at meetings of stockholders and the meeting chairman’s scope of authority (Sections 2.4 and 2.10); (ii) narrowed and otherwise clarified certain informational requirements applicable to all director nominees (Section 2.9); (iii) deleted the requirement to provide a description of any performance-related fees (Section 2.10); and (iv) added flexibility to approve bylaw amendments via written consent (Section 11.1). The foregoing description of the Amended and Restated Bylaws is qualified in its entirety by reference to the Amended and Restated Bylaws which are filed as Exhibit 3.1 to this Current Report on Form 8-K and incorporated herein by reference.

Item 7.01. Regulation FD Disclosure

In connection with the filing of the Earnings Release, the Company made materials entitled “Supplemental Quarterly Data” and “CFO Commentary” available through the investor relations page of its website. The CFO Commentary includes certain estimates relating to 2025 and other future results.

Item 9.01. Financial Statements and Exhibits

3.1

Amended and Restated Bylaws of Arthur J. Gallagher & Co.

99.1

Press release, dated January 30, 2025, issued by Arthur J. Gallagher & Co.

104

The cover page from this Current Report on Form 8-K, formatted in Inline XBRL.

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: January 30, 2025

By:

/s/ Douglas K. Howell

Douglas K. Howell

Vice President and Chief Financial Officer

8-K

false 0000354190 0000354190 2024-10-24 2024-10-24

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 October 24, 2024 Date of Report: (Date of earliest event reported)

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 Golf Road, Rolling Meadows, Illinois 60008, (630) 773-3800 (Address, including zip code and telephone number, including area code, of registrant’s principal executive offices) 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 2.02. Results of Operations and Financial Condition

On October 24, 2024, Arthur J. Gallagher & Co. (the Company) issued a press release setting forth the Company’s financial results for the quarter ended September 30, 2024 (the Earnings Release). A copy of the Earnings Release is attached hereto as Exhibit 99.1.

Item 7.01. Regulation FD Disclosure

In connection with the filing of the Earnings Release, the Company made materials entitled “Supplemental Quarterly Data” and “CFO Commentary” available through the investor relations page of its website. The CFO Commentary includes certain estimates relating to 2024 and other future results.

Item 9.01. Financial Statements and Exhibits

99.1

Press release, dated October 24, 2024, issued by Arthur J. Gallagher & Co.

104

The cover page from this Current Report on Form 8-K, formatted in Inline XBRL.

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: October 24, 2024

By:

/s/ Douglas K. Howell

Douglas K. Howell Vice President and Chief Financial Officer

8-K

false 0000354190 0000354190 2024-07-24 2024-07-24

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 July 24, 2024 Date of Report: (Date of earliest event reported)

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 Golf Road, Rolling Meadows, Illinois 60008, (630) 773-3800 (Address, including zip code and telephone number, including area code, of registrant’s principal executive offices) 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 2.02. Results of Operations and Financial Condition

On July 25, 2024, Arthur J. Gallagher & Co. (the Company) issued a press release setting forth the Company’s financial results for the quarter ended June 30, 2024 (the Earnings Release). A copy of the Earnings Release is attached hereto as Exhibit 99.1.

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

On July 24, 2024, the Board of Directors (the Board) of the Company increased the number of directors on the Board from nine to ten in accordance with Section 3.1 of the Company’s Amended and Restated By-Laws. The Board appointed Richard Harries to fill the resulting vacancy and to serve as a director until he stands for election at the 2025 Annual Meeting of Stockholders, effective immediately. Concurrently with his appointment to the Board, Mr. Harries was appointed to serve on the Audit and Risk and Compliance Committees of the Board. Mr. Harries will participate in the Company’s standard compensation program for non-employee directors, as described in the proxy statement for its 2024 Annual Meeting of Stockholders in the section entitled “Director Compensation”. The Company will also enter into its standard form of indemnification agreement with Mr. Harries. There are no transactions in which Mr. Harries has an interest that require disclosure under Item 404(a) of Regulation S-K. In addition, there is no arrangement or understanding between Mr. Harries and any other person pursuant to which he was selected to serve as a director.

Item 7.01. Regulation FD Disclosure

In connection with the filing of the Earnings Release, the Company made materials entitled “Supplemental Quarterly Data” and “CFO Commentary” available through the investor relations page of its website. The CFO Commentary includes certain estimates relating to 2024 and other future results.

Item 9.01. Financial Statements and Exhibits

99.1

Press release, dated July 25, 2024, issued by Arthur J. Gallagher & Co.

99.2

Press release regarding the appointment of Mr. Harries, dated July 24, 2024, issued by Arthur J. Gallagher & Co.

104

The cover page from this Current Report on Form 8-K, formatted in Inline XBRL.

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: July 25, 2024

By:

/s/ Douglas K. Howell

Douglas K. Howell Vice President and Chief Financial Officer

8-K

false 0000354190 0000354190 2024-04-25 2024-04-25

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 April 25, 2024 Date of Report: (Date of earliest event reported)

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 Golf Road, Rolling Meadows, Illinois 60008, (630) 773-3800 (Address, including zip code and telephone number, including area code, of registrant’s principal executive offices) 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 2.02. Results of Operations and Financial Condition

On April 25, 2024, Arthur J. Gallagher & Co. (the Company) issued a press release setting forth the Company’s financial results for the quarter ended March 31, 2024 (the Earnings Release). A copy of the Earnings Release is attached hereto as Exhibit 99.1.

Item 7.01. Regulation FD Disclosure

In connection with the filing of the Earnings Release, the Company made materials entitled “Supplemental Quarterly Data” and “CFO Commentary” available through the investor relations page of its website. The CFO Commentary includes certain estimates relating to 2024 and other future results.

Item 9.01. Financial Statements and Exhibits

99.1

Press release, dated April 25, 2024, issued by Arthur J. Gallagher & Co.

104

The cover page from this Current Report on Form 8-K, formatted in Inline XBRL.

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: April 25, 2024

By:

/s/ Douglas K. Howell

Douglas K. Howell Vice President and Chief Financial Officer

8-K

false 0000354190 0000354190 2024-01-25 2024-01-25

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 January 25, 2024 Date of Report: (Date of earliest event reported)

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 Golf Road, Rolling Meadows, Illinois 60008, (630) 773-3800 (Address, including zip code and telephone number, including area code, of registrant’s principal executive offices) 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 2.02. Results of Operations and Financial Condition

On January 25, 2024, Arthur J. Gallagher & Co. (the Company) issued a press release setting forth the Company’s financial results for the quarter and full year ended December 31, 2023 (the Earnings Release). A copy of the Earnings Release is attached hereto as Exhibit 99.1.

Item 7.01. Regulation FD Disclosure

In connection with the filing of the Earnings Release, the Company made materials entitled “Supplemental Quarterly Data” and “CFO Commentary” available through the investor relations page of its website. The CFO Commentary includes certain estimates relating to 2024 and other future results.

Item 9.01. Financial Statements and Exhibits

99.1

Press release, dated January25, 2024, issued by Arthur J. Gallagher & Co.

104

The cover page from this Current Report on Form 8-K, formatted in Inline XBRL.

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: January 25, 2024

By:

/s/ Douglas K. Howell

Douglas K. Howell Vice President and Chief Financial Officer

8-K

false 0000354190 0000354190 2023-10-26 2023-10-26

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 October 26, 2023 Date of Report: (Date of earliest event reported)

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 Golf Road, Rolling Meadows, Illinois 60008, (630) 773-3800 (Address, including zip code and telephone number, including area code, of registrant’s principal executive offices) 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 2.02. Results of Operations and Financial Condition

On October 26, 2023, Arthur J. Gallagher & Co. (the Company) issued a press release setting forth the Company’s financial results for the quarter ended September 30, 2023 (the Earnings Release). A copy of the Earnings Release is attached hereto as Exhibit 99.1.

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

On October 24, 2023, the Board of Directors (the Board) of the Company appointed Thomas J. Gallagher as President, succeeding J. Patrick Gallagher, Jr. in such role. J. Patrick Gallagher, Jr. will continue to serve as the Company’s Chairman of the Board and Chief Executive Officer. In addition, the Board appointed Patrick M. Gallagher as Chief Operating Officer. Both appointments are effective January 1, 2024. Information with respect to Messrs. T. Gallagher and P.M. Gallagher required to be disclosed under Items 401(b), (d), (e) and Item 404(a) of Regulation S-K pursuant to Item 5.02(c)(2) of Form 8-K has been included in the Company’s Annual Report on Form 10-K filed with the Securities and Exchange Commission (the SEC) on February 10, 2023, or in the Company’s definitive proxy statement for the 2023 Annual Meeting of Stockholders filed with the SEC on March 27, 2023, as applicable, and such information is incorporated herein by reference.

Item 7.01. Regulation FD Disclosure

In connection with the filing of the Earnings Release, the Company made materials entitled “Supplemental Quarterly Data” and “CFO Commentary” available through the investor relations page of its website. The CFO Commentary includes certain estimates relating to 2023 and other future results.

Item 9.01. Financial Statements and Exhibits

99.1

Press release, dated October 26, 2023, issued by Arthur J. Gallagher & Co.

104

The cover page from this Current Report on Form 8-K, formatted in Inline XBRL.

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: October 26, 2023

By:

/s/ Douglas K. Howell

Douglas K. Howell Vice President and Chief Financial Officer

8-K

false 0000354190 0000354190 2023-07-27 2023-07-27

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 July 27, 2023 Date of Report: (Date of earliest event reported)

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 Golf Road, Rolling Meadows, Illinois 60008, (630) 773-3800 (Address, including zip code and telephone number, including area code, of registrant’s principal executive offices) 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 2.02. Results of Operations and Financial Condition

On July 27, 2023, Arthur J. Gallagher & Co. (the Company) issued a press release setting forth the Company’s financial results for the quarter ended June 30, 2023 (the Earnings Release). A copy of the Earnings Release is attached hereto as Exhibit 99.1.

Item 7.01. Regulation FD Disclosure

In connection with the filing of the Earnings Release, the Company made materials entitled “Supplemental Quarterly Data” and “CFO Commentary” available through the investor relations page of its website. The CFO Commentary includes certain estimates relating to 2023 and other future results.

Item 9.01. Financial Statements and Exhibits

99.1

Press release, dated July 27, 2023, issued by Arthur J. Gallagher & Co.

104

The cover page from this Current Report on Form 8-K, formatted in Inline XBRL.

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: July 27, 2023

By:

/s/ Douglas K. Howell

Douglas K. Howell Vice President and Chief Financial Officer

8-K

false 0000354190 0000354190 2023-04-27 2023-04-27

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 April 27, 2023 Date of Report: (Date of earliest event reported)

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 Golf Road, Rolling Meadows, Illinois 60008, (630) 773-3800 (Address, including zip code and telephone number, including area code, of registrant’s principal executive offices) 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 2.02. Results of Operations and Financial Condition

On April 27, 2023, Arthur J. Gallagher & Co. (the Company) issued a press release setting forth the Company’s financial results for the quarter ended March 31, 2023 (the Earnings Release). A copy of the Earnings Release is attached hereto as Exhibit 99.1.

Item 7.01. Regulation FD Disclosure

In connection with the filing of the Earnings Release, the Company made materials entitled “Supplemental Quarterly Data” and “CFO Commentary” available through the investor relations page of its website. The CFO Commentary includes certain estimates relating to 2023 and other future results.

Item 9.01. Financial Statements and Exhibits

99.1

Press release, dated April 27, 2023, issued by Arthur J. Gallagher & Co.

104

The cover page from this Current Report on Form 8-K, formatted in Inline XBRL.

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: April 27, 2023

By:

/s/ Douglas K. Howell

Douglas K. Howell

Vice President and Chief Financial Officer

8-K

false 0000354190 0000354190 2023-01-26 2023-01-26

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 January 26, 2023 Date of Report: (Date of earliest event reported)

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 Golf Road, Rolling Meadows, Illinois 60008, (630) 773-3800 (Address, including zip code and telephone number, including area code, of registrant’s principal executive offices) 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 2.02. Results of Operations and Financial Condition

On January 26, 2023, Arthur J. Gallagher & Co. (the Company) issued a press release setting forth the Company’s financial results for the quarter and full year ended December 31, 2022 (the Earnings Release). A copy of the Earnings Release is attached hereto as Exhibit 99.1.

Item 7.01. Regulation FD Disclosure

In connection with the filing of the Earnings Release, the Company made materials entitled “Supplemental Quarterly Data” and “CFO Commentary” available through the investor relations page of its website. The CFO Commentary includes certain estimates relating to 2023 and other future results.

Item 9.01. Financial Statements and Exhibits

99.1

Press release, dated January 26, 2023, issued by Arthur J. Gallagher & Co.

104

The cover page from this Current Report on Form 8-K, formatted in Inline XBRL.

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: January 26, 2023

By:

/s/ Douglas K. Howell

Douglas K. Howell

Vice President and Chief Financial Officer

8-K

false 0000354190 0000354190 2022-10-27 2022-10-27

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 October 27, 2022 Date of Report: (Date of earliest event reported)

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 Golf Road, Rolling Meadows, Illinois 60008, (630) 773-3800 (Address, including zip code and telephone number, including area code, of registrant’s principal executive offices) 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 2.02. Results of Operations and Financial Condition

On October 27, 2022, Arthur J. Gallagher & Co. (the Company) issued a press release setting forth the Company’s financial results for the quarter ended September 30, 2022 (the Earnings Release). A copy of the Earnings Release is attached hereto as Exhibit 99.1.

Item 7.01. Regulation FD Disclosure

In connection with the filing of the Earnings Release, the Company made materials entitled “Supplemental Quarterly Data” and “CFO Commentary” available through the investor relations page of its website. The CFO Commentary includes certain estimates relating to 2022 and other future results.

Item 9.01. Financial Statements and Exhibits

99.1

Press release, dated October 27, 2022, issued by Arthur J. Gallagher & Co.

104

The cover page from this Current Report on Form 8-K, formatted in Inline XBRL.

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: October 27, 2022

By:

/s/ Douglas K. Howell

Douglas K. Howell

Vice President and Chief Financial Officer

8-K

false 0000354190 0000354190 2022-07-28 2022-07-28

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 July 28, 2022 Date of Report: (Date of earliest event reported)

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 Golf Road, Rolling Meadows, Illinois 60008, (630) 773-3800 (Address, including zip code and telephone number, including area code, of registrant’s principal executive offices) 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 2.02. Results of Operations and Financial Condition

On July 28, 2022, Arthur J. Gallagher & Co. (the Company) issued a press release setting forth the Company’s financial results for the quarter ended June 30, 2022 (the Earnings Release). A copy of the Earnings Release is attached hereto as Exhibit 99.1.

Item 7.01. Regulation FD Disclosure

In connection with the filing of the Earnings Release, the Company made materials entitled “Supplemental Quarterly Data” and “CFO Commentary” available through the investor relations page of its website. The CFO Commentary includes certain estimates relating to 2022 and other future results.

Item 9.01. Financial Statements and Exhibits

99.1

Press release, dated July 28, 2022, issued by Arthur J. Gallagher & Co.

104

The cover page from this Current Report on Form 8-K, formatted in Inline XBRL.

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: July 28, 2022

By:

/s/ Douglas K. Howell

Douglas K. Howell Vice President and Chief Financial Officer

8-K

false 0000354190 0000354190 2022-04-28 2022-04-28

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 April 28, 2022 Date of Report: (Date of earliest event reported)

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 Golf Road, Rolling Meadows, Illinois 60008, (630) 773-3800 (Address, including zip code and telephone number, including area code, of registrant’s principal executive offices) 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 2.02. Results of Operations and Financial Condition

On April 28, 2022, Arthur J. Gallagher & Co. (the Company) issued a press release setting forth the Company’s financial results for the quarter ended March 31, 2022 (the Earnings Release). A copy of the Earnings Release is attached hereto as Exhibit 99.1.

Item 7.01. Regulation FD Disclosure

In connection with the filing of the Earnings Release, the Company made materials entitled “Supplemental Quarterly Data” and “CFO Commentary” available through the investor relations page of its website. The CFO Commentary includes certain estimates relating to 2022 and other future results.

Item 9.01. Financial Statements and Exhibits

99.1

Press release, dated April 28, 2022, issued by Arthur J. Gallagher & Co.

104

The cover page from this Current Report on Form 8-K, formatted in Inline XBRL.

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: April 28, 2022

By:

/s/ Douglas K. Howell

Douglas K. Howell Vice President and Chief Financial Officer

8-K

false 0000354190 0000354190 2022-01-27 2022-01-27

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 January 27, 2022 Date of Report: (Date of earliest event reported)

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 Golf Road, Rolling Meadows, Illinois 60008, (630) 773-3800 (Address, including zip code and telephone number, including area code, of registrant’s principal executive offices) 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 2.02. Results of Operations and Financial Condition

On January 27, 2022, Arthur J. Gallagher & Co. (the Company) issued a press release setting forth the Company’s financial results for the quarter and full year ended December 31, 2021 (the Earnings Release). A copy of the Earnings Release is attached hereto as Exhibit 99.1.

Item 7.01. Regulation FD Disclosure

In connection with the filing of the Earnings Release, the Company made materials entitled “Supplemental Quarterly Data” and “CFO Commentary” available through the investor relations page of its website. The CFO Commentary includes certain estimates relating to 2022 and other future results.

Item 9.01. Financial Statements and Exhibits

99.1

Press release, dated January 27, 2022, issued by Arthur J. Gallagher & Co.

104

The cover page from this Current Report on Form 8-K, formatted in Inline XBRL.

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: January 27, 2022

By:

/s/ Douglas K. Howell

Douglas K. Howell Vice President and Chief Financial Officer

8-K

Arthur J. Gallagher & Co. false 0000354190 0000354190 2021-10-28 2021-10-28

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 October 28, 2021 Date of Report: (Date of earliest event reported)

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 Golf Road, Rolling Meadows, Illinois 60008, (630) 773-3800 (Address, including zip code and telephone number, including area code, of registrant’s principal executive offices) 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 2.02. Results of Operations and Financial Condition

On October 28, 2021, Arthur J. Gallagher & Co. (the Company) issued a press release setting forth the Company’s financial results for the quarter ended September 30, 2021 (the Earnings Release). A copy of the Earnings Release is attached hereto as Exhibit 99.1.

Item 7.01. Regulation FD Disclosure

In connection with the filing of the Earnings Release, the Company made materials entitled “Supplemental Quarterly Data” and “CFO Commentary” available through the investor relations page of its website. The CFO Commentary includes certain estimates relating to 2021 and 2022 results.

Item 9.01. Financial Statements and Exhibits

99.1

Press release, dated October 28, 2021, issued by Arthur J. Gallagher & Co.

104

The cover page from this Current Report on Form 8-K, formatted in Inline XBRL.

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: October 28, 2021

By:

/s/ Douglas K. Howell

Douglas K. Howell Vice President and Chief Financial Officer