Trade Summary

1 week ago, Bay Walter D., serving as GC at Arthur J. Gallagher & Co. (AJG), sold 15,850 shares at $255.00 per share, for a total transaction value of $4,041,750.00. Following this transaction, Bay Walter D. now holds 78,244 shares of AJG.

This sale represents a 17.00% decrease in Bay Walter D.'s stake in the company. This is considered a high-conviction trade given the significant change in ownership.

The trade was executed on Friday, December 19, 2025 and publicly disclosed via SEC Form 4 filing on Tuesday, December 23, 2025, 4 days after the trade was made.

Arthur J. Gallagher & Co. operates in the FINANCIAL SERVICES sector, specifically within the INSURANCE BROKERS industry. Insider selling activity in this sector can provide valuable signals about industry trends and company-specific developments.