Arthur J. Gallagher & Co. Acquires Hann Insurance Brokers Pty Ltd

Arthur J. Gallagher & Co. Acquires Hagan Insurance Group

July 25, 2023

Insurance

Arthur J. Gallagher & Co. acquired Sioux Falls–based Hagan Insurance Group to expand its association and affinity benefits capabilities. The Hagan team will remain in place and operate under Gallagher's Affinity North America leadership to provide complementary expertise and cross-selling opportunities.

Arthur J. Gallagher & Co. Acquires MACK Insurance Services

August 5, 2025

Insurance

Arthur J. Gallagher & Co. has acquired Australia-based MACK Insurance Services, a commercial insurance broker focused on the agriculture sector. Lizzie Carver and her team will join Gallagher’s Australian brokerage operations from offices in Wagga Wagga and Narrandera, New South Wales; terms were not disclosed.

Arthur J. Gallagher & Co. Acquires Hartley Cylke Pacific Insurance Services

September 25, 2023

Insurance

Arthur J. Gallagher & Co. acquired San Diego-based Hartley Cylke Pacific Insurance Services, Inc., a retail insurance broker specializing in transportation for clients across California and Arizona. The Hartley, Cylke and Hawes team will remain in place and operate under Gallagher's Southwest region retail property/casualty brokerage leadership; terms were not disclosed.

Arthur J. Gallagher & Co. Acquires Hughes Insurance Agency, Inc.

November 21, 2023

Insurance

Arthur J. Gallagher & Co. acquired Queensbury, New York–based Hughes Insurance Agency, Inc.; terms were not disclosed. Hughes will join Gallagher Agency Alliance and its principals Linda Abodeely and Joe Koncikowski and their team will continue to operate from their current location under Gallagher's Global Small Business practice.

Arthur J. Gallagher & Co. Acquires THB Chile

November 21, 2024

Insurance

Arthur J. Gallagher & Co. acquired Santiago, Chile-based THB Chile, a retail insurance broker that provides property/casualty, life and health benefits, and reinsurance services. Terms were not disclosed; Gallagher said the deal expands its retail and reinsurance brokerage operations in Chile.

Arthur J. Gallagher & Co. Acquires Tresidder Insurance Brokers

April 1, 2025

Insurance

Arthur J. Gallagher & Co. acquired Australia-based Tresidder Insurance Brokers to strengthen its specialty broking presence in Australia. Tresidder, which operates offices in Victoria and Queensland and serves commercial and personal lines clients across industries including manufacturing, food & beverage, biotech and agriculture, will join Gallagher’s Australia specialty broking division.