# Arthur J. Gallagher & Co. **Source:** https://geo.sig.ai/brands/arthur-j-gallagher-co **Vertical:** Consumer Finance **Subcategory:** Enterprise **Tier:** Leader **Website:** ajg.com **Last Updated:** 2026-04-14 ## Summary 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. ## Company Overview 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. Arthur J. Gallagher's insurance brokerage model creates value through the combination of carrier market access (negotiating policy terms and pricing with 300+ insurance carriers on behalf of clients) and claims advocacy (representing the client in coverage disputes and claims settlement negotiations): a middle-market manufacturer insuring a $50 million commercial property with $10 million general liability needs a broker who understands industrial property valuation, knows which carriers offer competitive coverage for chemical storage risks, and can negotiate business interruption coverage terms — Gallagher's specialty expertise in manufacturing and industrial risks creates differentiated advisory value versus a generalist broker placing the account with the cheapest carrier. The serial acquisition strategy builds coverage in every US metropolitan market and dozens of international markets, enabling Gallagher to serve national clients who need consistent brokerage capabilities in 50 US cities without managing 50 independent regional broker relationships. In 2025, Arthur J. Gallagher competes in global insurance brokerage and risk management against Marsh & McLennan Companies (NYSE: MMC, $24.4B 2024 revenue, Marsh, Guy Carpenter, Mercer), Aon plc (NYSE: AON, $15.7B revenue, reinsurance and risk advisory), and Willis Towers Watson (NASDAQ: WTW, $9.6B revenue, brokerage and HR consulting) for corporate and middle-market insurance placement, specialty risk programs, and employee benefits consulting. The AssuredPartners acquisition dramatically expands Gallagher's middle-market presence — where AssuredPartners had built strong local relationships in markets where Marsh and Aon focus on larger enterprise clients — creating the scale to compete for middle-market insurance placements across the entire US geography. The insurance market hardening (commercial property premiums increasing 15-25% in catastrophe-exposed markets) creates favorable brokerage commission conditions as premiums on which Gallagher earns percentage-based commissions increase. The 2025 strategy focuses on AssuredPartners integration (retaining key producers and clients through the ownership transition), organic growth through new client acquisition, and continued specialty insurance broker acquisitions in transportation, healthcare, and construction niches. ## Frequently Asked Questions ### What does Arthur J. Gallagher & Co. do? Arthur J. Gallagher & Co. is a global insurance brokerage, risk management, and consulting services firm. The company provides insurance brokerage services (86% of revenues) helping clients secure property/casualty and employee benefits coverage, and risk management services (14% of revenues) including claims administration and loss control consulting. Gallagher serves clients ranging from small businesses to multinational corporations across more than 130 countries. ### Who are Arthur J. Gallagher's target customers? Gallagher serves a broad range of customers including middle-market businesses, large corporations, multinational enterprises, government entities, healthcare providers, transportation companies, energy firms, and individuals requiring specialty insurance. The 2025 AssuredPartners acquisition particularly strengthened capabilities in the middle-market segment with expertise in transportation, energy, healthcare, and government contractors. ### When was Arthur J. Gallagher & Co. founded? Arthur J. Gallagher & Co. was founded in 1927 by Arthur J. Gallagher in Chicago, Illinois. According to company lore, Gallagher used his family's kitchen table as his first office. The company incorporated in 1950 and went public in 1984 on the New York Stock Exchange, growing from a one-person operation to the third-largest insurance broker globally. ### Where is Arthur J. Gallagher headquartered? Arthur J. Gallagher & Co. is headquartered in Rolling Meadows, Illinois, USA. The company operates globally with over 71,000 employees across more than 130 countries, with significant operations in the United States, United Kingdom, Ireland, Australia, Canada, New Zealand, Brazil, Singapore, and other international markets. ### What makes Arthur J. Gallagher different from competitors? Gallagher differentiates through 'The Gallagher Way' culture emphasizing integrity, teamwork, and client service; deep specialization in middle-market businesses and specific industries; comprehensive risk management approach beyond just insurance placement; strong ethical reputation (13 consecutive years as World's Most Ethical Company through 2024); and entrepreneurial culture despite being the third-largest global broker. The company combines local market expertise with global resources. ### Who are Arthur J. Gallagher's main competitors? Gallagher's primary competitors are Marsh McLennan (28.55% market share, $22.7B revenue), Aon plc (18.65% market share, $13.4B revenue), and Willis Towers Watson ($9.48B revenue). As of Q1 2025, Gallagher held 27.17% market share with revenues of $11.555 billion (2024). Gallagher focuses more on middle-market clients while Marsh and Aon typically dominate large multinational accounts. ### What is Arthur J. Gallagher's financial performance? In 2024, Gallagher generated $11.555 billion in revenue (14.72% increase) with $2.25 billion in earnings. Trailing twelve-month revenue as of September 2025 reached $12.08 billion (13.23% growth). Market capitalization stood at $82 billion as of June 2025. The company projects 12% annual revenue growth over the next three years, significantly exceeding the 5.2% insurance industry average. Approximately 56,000 employees serve the business. ### What was the AssuredPartners acquisition? In August 2025, Gallagher completed the acquisition of AssuredPartners for $13.45 billion ($12.45 billion net of tax benefits), the largest sale of a U.S. insurance broker to a strategic acquirer in industry history. The deal added 10,900 employees, approximately $2.9 billion in pro forma revenues, and 400 offices across the U.S., UK, and Ireland, significantly strengthening Gallagher's middle-market presence in transportation, energy, healthcare, and government contractor sectors. ### What is 'The Gallagher Way'? The Gallagher Way is a set of 25 tenets written by former chairman Robert E. Gallagher that defines company culture and values. Key principles include: supporting and trusting one another, pushing for professional excellence, treating everyone as important with no second-class citizens, adhering to highest moral and ethical standards, and continuous learning. These tenets are displayed in Gallagher offices worldwide and guide decision-making and employee behavior. ### How many acquisitions does Gallagher typically make? Gallagher pursues an aggressive acquisition strategy, completing 46 acquisitions in 2024 alone that added approximately $363 million in annualized revenue. The company has acquired hundreds of brokerages over the past two decades, ranging from small local agencies to major transactions like AssuredPartners ($13.45B in 2025), Woodruff Sawyer ($1.2B in 2024), and Cadence Bank's brokerage unit ($904M in 2023). ### What recognition has Arthur J. Gallagher received? Gallagher has been named one of the World's Most Ethical Companies by Ethisphere for 13 consecutive years (through 2024), the only insurance broker to receive this honor. In 2025, the company received recognition as a World's Best Company by TIME and earned a Platinum Bell Seal for Workplace Mental Health Certification. Gallagher is also certified as a Great Place to Work and receives Top Workplaces recognition. ### What international markets does Gallagher serve? Gallagher operates in more than 130 countries with over 71,000 employees worldwide. The company generates approximately one-third of its revenue internationally, with significant operations in Australia, Canada, New Zealand, United Kingdom, Ireland, Brazil, Singapore, and other markets. International expansion includes offices in Bermuda (1972), London (1974), Brazil (2010), Singapore (2011), and Australia (2014). ## Tags b2c, fintech, insurance, global, public --- *Data from geo.sig.ai Brand Intelligence Database. Updated 2026-04-14.*