Exhibit 32.1
Section 1350 Certification of Chief Executive Officer
I, J. Patrick Gallagher, Jr., the chief executive officer of Arthur J. Gallagher & Co., certify that (i) the Quarterly Report onForm 10-Q of Arthur J. Gallagher & Co. for the quarterly period ended September 30, 2014 (the “Form10-Q”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and (ii) the information contained in theForm 10-Q fairly presents, in all material respects, the financial condition and results of operations of Arthur J. Gallagher & Co. and its subsidiaries.
Date: October 29, 2014
/s/ J. Patrick Gallagher, Jr. |
| J. Patrick Gallagher, Jr. |
President and Chief Executive Officer (principal executive officer) |
A signed original of this written statement required by 18 U.S.C. Section 1350 has been provided to Arthur J. Gallagher & Co. and will be retained by Arthur J. Gallagher & Co. and furnished to the Securities Exchange Commission or its staff upon request.