EX-23.1 5 ajg-ex23_1.htm EX-23.1

Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the following Registration Statements, as listed below, of our reports dated February 17, 2025, with respect the consolidated financial statements and related financial statement schedule of Arthur J. Gallagher & Co., and the effectiveness of internal control over financial reporting of Arthur J. Gallagher & Co., included in this Annual Report (Form 10‑K) of Arthur J. Gallagher & Co. for the year ended December 31, 2024.

Form | Registration Statement No. | Description
Form S-8 | 333-87320 and 333-106535 | Arthur J. Gallagher & Co. 1988 Nonqualified Stock Option Plan and Arthur J. Gallagher & Co. Non‑Employee Directors’ Stock Option Plan
Form S-8 | 333-106539 | Arthur J. Gallagher & Co. Restricted Stock Plan
Form S-8 | 333-174497 | Arthur J. Gallagher & Co. 2011 Long-Term Incentive Plan
Form S-8 | 333-197898 | Arthur J. Gallagher & Co. 2014 Long-Term Incentive Plan, Arthur J. Gallagher & Co. Deferred Equity Participation Plan, Arthur J. Gallagher & Co. Deferred Cash Participation Plan and Arthur J. Gallagher & Co. Supplemental Savings and Thrift Plan
Form S-8 | 333-204976 | Arthur J. Gallagher & Co. Employee Stock Purchase Plan
Form S-8 | 333-221274 | Arthur J. Gallagher & Co. 2017 Long-Term Incentive Plan, Arthur J. Gallagher & Co. Deferred Equity Participation Plan, Arthur J. Gallagher & Co. Deferred Cash Participation Plan and Arthur J. Gallagher & Co. Supplemental Savings and Thrift Plan
Form S-8 | 333-252830 | Arthur J. Gallagher & Co. Employees’ 401(k) Savings and Thrift Plan
Form S-8 | 333-258331 | Arthur J. Gallagher & Co. UK Employee Share Incentive Plan
Form S-3 | 333-277002 | Debt Securities, Guarantees, Common Stock, Preferred Stock, Warrants, Depositary Shares, Purchase Contracts, and Units
Form S-4 | 333-203203 333-214617and 333-268400 | Shares of Common Stock
Form S-8 | 333-262899 | Arthur J. Gallagher & Co. Employees’ 401(k) Savings and Thrift Plan and Arthur J. Gallagher & Co. Supplemental Savings and Thrift Plan
Form S-8 | 333-268401 | Arthur J. Gallagher & Co. 2022 Long-Term Incentive Plan

/s/ Ernst & Young LLP
Ernst & Young LLP

Chicago, Illinois

February 17, 2025