Arthur J. Gallagher & Co.

Arthur J. Gallagher & Co. (NYSE: AJG) operates as the world's third largest insurance broker and risk manager based on revenues. Founded in 1927, the company has evolved from a single-person insurance agency into a comprehensive global provider of insurance brokerage, reinsurance brokerage, consulting, and third-party property and casualty claims settlement and administration services. The company maintains its website at http://investor.ajg.com.

Gallagher operates through three reportable segments: brokerage, risk management, and corporate. The brokerage segment accounts for approximately 87% of revenues and operates through more than 650 sales and service offices in the United States and approximately 400 offices across 60 countries, primarily in Australia, Canada, New Zealand, and the United Kingdom. The risk management segment contributes 13% of revenues and manages third-party claims adjusting operations through more than 40 offices globally. The company generates approximately 67% of revenues domestically and 33% internationally.

Within its brokerage operations, Gallagher provides retail insurance brokerage services covering nearly all commercial property and casualty and health and welfare insurance lines. The company operates specialized niche and practice groups targeting specific industries including aviation, construction, energy, healthcare, financial institutions, and technology. The company also maintains global reinsurance brokerage operations, wholesale insurance brokerage operations, and captive underwriting enterprises. Its risk management segment primarily serves Fortune 1000 companies, larger middle-market companies, nonprofit organizations, and public sector entities, with approximately 95% of revenues derived from clients unaffiliated with its brokerage operations.

As of December 31, 2025, Gallagher employed approximately 72,000 people, with 47% based in the United States and 53% internationally. The company has completed approximately 780 acquisitions since 2002, ranging from small regional brokerages to larger strategic acquisitions. The company's client base is highly diversified, with no single client representing more than 1% of combined brokerage and risk management segment revenues. Gallagher's competitive advantages include its specialized expertise within niche markets, data analytics capabilities, technology platforms, and ability to deliver comprehensive solutions across the insurance value chain.