Arthur J. Gallagher & Co. vs Brown & Brown
Side-by-side comparison of AI visibility scores, market position, and capabilities
Rolling Meadows IL insurance brokerage (NYSE: AJG) ~$14B combined revenue; $13.45B AssuredPartners acquisition (industry largest), +10,900 employees, 400 offices, third largest global broker competing with Marsh McLennan.
About
Arthur J. Gallagher & Co. is a Rolling Meadows, Illinois-based global insurance brokerage and risk management company — publicly traded on the New York Stock Exchange (NYSE: AJG) as an S&P 500 Financials component — providing commercial property/casualty insurance brokerage, employee benefits consulting, and risk management services to businesses and organizations worldwide through approximately 58,000 employees following the completion of the AssuredPartners acquisition. The defining transaction of 2025 was Arthur J. Gallagher's closing of the $13.45 billion acquisition of AssuredPartners — the largest sale of a US insurance broker to a strategic acquirer in industry history — adding 10,900 employees, approximately $2.9 billion in pro forma revenues, and 400 offices across the United States, United Kingdom, and Ireland, with particular middle-market strength in transportation, energy, healthcare, and government contracting. The AssuredPartners combination accelerates Gallagher's position as the third-largest insurance broker globally (behind Marsh & McLennan and Aon), with combined annual revenues exceeding $14 billion. CEO J. Patrick Gallagher Jr. has led the company's strategy of organic growth supplemented by a relentless acquisition program of regional and specialty insurance brokers — Gallagher has completed 40-50+ acquisitions per year in recent years — building a national and international distribution network that can cross-sell specialty insurance products across AssuredPartners' 400 acquired office locations. Gallagher's Risk Management Services division (claims adjusting and administration for self-insured corporations and government entities) provides a second business line that diversifies revenue from insurance brokerage commission and fee income.
Daytona Beach FL insurance brokerage (NYSE: BRO) $4.5B FY2024 revenue (+12%); decentralized acquisition model, National Programs specialty, 30-year consistent growth competing with Marsh McLennan and Aon.
About
Brown & Brown, Inc. is a Daytona Beach, Florida-based insurance brokerage and risk management company — publicly traded on the New York Stock Exchange (NYSE: BRO) as an S&P 500 Financials component — providing insurance brokerage, risk management consulting, and third-party claims administration services to businesses and individuals across the United States, Canada, the UK, Ireland, and Bermuda through approximately 16,000 employees at 500+ offices. In fiscal year 2024, Brown & Brown reported revenues of $4.5 billion (+12% organic growth) — continuing its 30-year track record of consistent organic and acquisition-driven revenue growth that has made Brown & Brown one of the fastest-growing large insurance brokers in the US, growing from $1B revenue in 2015 to $4.5B in 2024 through organic growth compounding and disciplined acquisition integration. CEO Powell Brown (son of founder Hyatt Brown, representing the family's generational leadership of the company) leads Brown & Brown's distinctive "decentralized" operating model where each acquired insurance agency retains its local brand identity, leadership team, and community relationships while benefiting from Brown & Brown's national carrier relationships, compliance infrastructure, shared technology, and capital for further acquisition. Brown & Brown's four business segments — Retail (local commercial insurance for small-to-midsize businesses), National Programs (specialty program insurance distributed through managing general agents for specific industries — veterinarians, dentists, pest control, construction), Wholesale Brokerage (surplus lines excess and specialty placement for non-admitted risks), and Services (third-party claims administration) — provide diversified revenue across insurance distribution channels that smooth individual market cycle volatility.
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