Arthur J. Gallagher & Co. vs S&P Global
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.
S&P Global (SPGI) reported $14.2B revenue in FY2024, up 14% YoY. Leading financial data and ratings company. S&P 500 index, credit ratings, market intelligence. HQ: New York, NY.
About
S&P Global Inc. is a leading provider of financial intelligence, credit ratings, data, research, and benchmarks, headquartered in New York City. Formed through the 2022 merger of S&P Global and IHS Markit, the combined company reported revenues of $14.2B in FY2024, up 14% year-over-year, with a market capitalization of approximately $160B. S&P Global is one of the few companies considered truly irreplaceable in the global financial system — it maintains the S&P 500 index, assigns credit ratings to sovereign and corporate debt globally, and provides the data infrastructure that powers financial markets.
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