Arthur J. Gallagher & Business Summary

Arthur J. Gallagher & Co. (AJG) operates a global insurance brokerage and risk management services model, primarily generating revenue through commissions and fee-based consulting. The company is structured into two core reporting segments: Brokerage (accounting for approximately 86% of revenue), which acts as an intermediary for commercial property/casualty, employee benefits, and reinsurance placements; and Risk Management (approximately 14% of revenue), which provides third-party administration (TPA) and claims management services through its Gallagher Bassett division. Following its landmark $13.5 billion acquisition of AssuredPartners in late 2025, AJG has solidified its position as the world’s third-largest insurance broker. It competes directly with Marsh McLennan, Aon, and Willis Towers Watson, distinguishing itself through a high-volume "tuck-in" M&A strategy and a specialized focus on middle-market and niche industry sectors. Founded in 1927 by Arthur Gallagher, the firm maintains a distinct family-led legacy and a culture codified as "The Gallagher Way." The current leadership team is headed by Chairman and CEO J. Patrick Gallagher Jr., the founder’s grandson, who has led the company since 1995 and holds a pedigree in government from Cornell University. He is supported by President Thomas J. Gallagher and Chief Financial Officer Douglas K. Howell, a veteran finance executive who has overseen the firm’s capital strategy since 2003. In 2024, Patrick M. Gallagher was elevated to Chief Operating Officer, representing the fourth generation of family leadership. The executive suite also includes Global Chief Information Officer Mark H. Bloom, formerly the CTO of Aegon N.V. The company’s board features prominent independent directors such as Lead Director David Johnson and former Northern Trust Vice Chairman Sherry Barrat, with significant institutional backing from major investors including Norges Bank and T. Rowe Price.