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

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

December 2, 2024

Insurance

Arthur J. Gallagher & Co. has acquired Lambton, New South Wales‑based Hann Insurance Brokers Pty Ltd; terms were not disclosed. Rhett Hann and his team will join Gallagher's Newcastle office, expanding Gallagher's retail property/casualty brokerage capabilities in Australia with added transport-sector expertise.

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.

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 Clements Worldwide

October 18, 2023

Insurance

Arthur J. Gallagher & Co. has acquired Clements Worldwide, a Washington, D.C.-based international insurance broker; terms were not disclosed. Clements' leadership and team will remain in place and will report into Gallagher's mid-South retail P&C brokerage operations, with the acquisition intended to bolster Gallagher's international capabilities and cross-selling opportunities.

Arthur J. Gallagher & Co. Acquires Bircroft Insurance Services

April 3, 2025

Insurance

Arthur J. Gallagher & Co. (Gallagher) has acquired London-based Bircroft Insurance Services, a specialist broker focused on retail and wholesale insurance for the commercial real estate sector. The Bircroft team, led by Ian Lee and Simon Bird, will join Gallagher’s specialist real estate practice within its UK & Ireland Retail division; terms were not disclosed.

Arthur J. Gallagher Acquires Asset Partners Private Wealth Pty Ltd

March 19, 2026

Financial Services

Arthur J. Gallagher & Co. announced the acquisition of Australia-based Asset Partners Private Wealth Pty Ltd. Financial terms were not disclosed, and David Just, Josh Pope and their team will remain in Robina, Queensland under Gallagher leadership.