Arthur J. Gallagher & Co.

Arthur J. Gallagher & Co. is a global insurance brokerage, risk management, and consulting services firm headquartered in Rolling Meadows, Illinois. Founded in 1927 by Arthur Gallagher, who famously used his family's kitchen table as his first office, the company has grown into the third-largest insurance broker globally, ranked 367th on the Fortune 500 and 192nd on the Forbes Global 2000. With over 71,000 employees operating in more than 130 countries, Gallagher serves clients ranging from small businesses to multinational corporations.

The company operates through two primary business segments: Insurance Brokerage (86% of 2024 revenues) and Risk Management Services (14% of 2024 revenues). The brokerage segment provides insurance and reinsurance brokerage and consulting services across property/casualty, employee benefits, and specialty insurance markets. The risk management segment delivers contract claim settlement and administration services, claims management, loss control consulting, and insurance property appraisal services, primarily through the Gallagher Bassett Services division formed in 1962.

Under the leadership of Chairman and CEO J. Patrick Gallagher Jr., who has led the company since 1995, Gallagher has pursued an aggressive growth strategy combining organic expansion with strategic acquisitions. In 2024, the company completed 46 acquisitions adding approximately $363 million in annualized revenue. The strategy culminated in August 2025 with the landmark $13.45 billion acquisition of AssuredPartners, the largest sale of a U.S. insurance broker to a strategic acquirer in industry history. This transformational deal added 10,900 colleagues and approximately $2.9 billion in pro forma revenues, significantly strengthening Gallagher's middle-market presence.

Gallagher's culture is defined by "The Gallagher Way," a set of 25 tenets written by former chairman Robert E. Gallagher that emphasize integrity, teamwork, professional excellence, and treating every employee as important. The company has been recognized as one of the World's Most Ethical Companies by Ethisphere for 13 consecutive years (through 2024) and received 2025 recognition as a World's Best Company by TIME, along with a Platinum Bell Seal for Workplace Mental Health Certification.

Financially, Gallagher has demonstrated consistent growth with 2024 revenues reaching $11.555 billion (14.72% increase) and earnings of $2.25 billion. The company generates approximately one-third of its revenue internationally, primarily in Australia, Canada, New Zealand, and the UK. With a market capitalization of $82 billion as of June 2025 and projected revenue growth of 12% annually over the next three years (compared to 5.2% industry average), Gallagher continues to solidify its position as a leader in the global insurance brokerage industry.