AJG Shares Dip 0.72% on $350M Volume (293rd) as Insider Sells Stake and Announces Acquisition

On August 22, 2025, Arthur J. Gallagher & Co. (AJG) closed at a 0.72% decline with a trading volume of $350 million, ranking 293rd in market activity. The stock's performance coincided with insider transactions and strategic updates from the insurance brokerage firm.

Cary Richard C, AJG's Controller and Chief Accounting Officer, sold 4,000 shares at $306 per share on August 21, reducing his direct ownership to approximately 56,668 shares while retaining indirect holdings through a 401(k) plan. The sale, disclosed via SEC Form 4, was classified as routine and non-dilutive, with no governance concerns or unusual transaction patterns identified in the filing.

Separately, the company finalized its acquisition of AssuredPartners on August 18, a U.S.-based insurance broker specializing in commercial, specialty, and employee benefits lines. The deal is expected to strengthen Gallagher's market position in the middle-market insurance segment. CEO J. Patrick Gallagher, Jr. emphasized the strategic value of the acquisition in enhancing client offerings and shareholder returns.

The strategy of buying the top 500 stocks by daily trading volume and holding them for one day from 2022 to 2025 delivered a 31.52% total return. The approach generated an average 0.98% daily return with a Sharpe ratio of 0.79, reflecting moderate risk-adjusted performance amid market volatility.