EX-23.1 3 d122768dex231.htm EX-23.1

EX-23.1

Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the Registration Statement pertaining to the Arthur J. Gallagher & Co. Employees’ 401(k) Savings and Thrift Plan of Arthur J. Gallagher & Co. of our reports dated February 5, 2021, with respect to the consolidated financial statements of Arthur J. Gallagher & Co. and the effectiveness of internal control over financial reporting of Arthur J. Gallagher & Co. included in its Annual Report (Form 10-K) for the year ended December 31, 2020, filed with the Securities and Exchange Commission.

/s/ Ernst & Young LLP

Ernst & Young LLP

Chicago, Illinois

February 5, 2021