Founded in 1927 and headquartered in Rolling Meadows, Illinois, Arthur J. Gallagher & Co. is a New York Stock Exchange-listed insurance brokerage and risk management services provider (ticker symbol AJG). Its core businesses include commercial insurance brokerage, risk management consulting, and third-party claims management services, serving clients including businesses, nonprofits, and public entities.

Arthur J. Gallagher & Co. (Gallagher) is a US-based insurance brokerage and risk management services firm headquartered in Rolling Meadows, Illinois, a suburb of Chicago. Founded in 1927, Gallagher has a global presence and is one of the world's largest insurance brokerage firms.
The company has continued to expand its business through mergers and acquisitions, completing its acquisition of AssuredPartners in 2024 for $13.45 billion, marking its largest acquisition ever. In 2022, it ranked 422nd on the Fortune 500 list with revenue of $8.209 billion, and revenue is projected to increase to $8.551 billion in 2023. In the Chinese market, it acquired a license through the acquisition of Beijing Rural Credit Insurance Brokerage and entered into a five-year strategic partnership with Spearhead Health.
Company Name: Arthur J. Gallagher.
Official Domain: ajg.com.
Domain Created: March 24, 1992.
Country: United States.
Headquarters: Rolling Meadows, USA.
Founded: 1927.