Based in Rolling Meadows, Illinois, Arthur J. Gallagher & Co. (AJG) is a global insurance brokerage, risk management, and consulting powerhouse. With a market cap of $68.8 billion, the company has grown into one of the world’s largest insurance brokers, serving businesses, institutions, and individuals across more than 130 countries through a combination of owned operations and international partnerships.
Arthur J. Gallagher has been taking a hit while the rest of the market has been cashing in. AJG stock has slipped 10.1% over the past year, while the broader S&P 500 Index ($SPX) has rallied 18.7%. The shares have shown some signs of life in 2026, gaining 3.8% year to date, but they are still trailing the broader index’s much stronger 12.2% advance.