Douglas K. Howell plan to sell securities of Arthur J. Gallagher & Co. under Form 144

Douglas K. Howell filed Form 144 to notify SEC of plan to sell 5000 units of Arthur J. Gallagher & Co. securities around 2025-12-22, with aggregate market value of $1,291,250.00. The total outstanding units is 256800000.0. The amount planned to be sold represents 0.00% of total outstanding units; Recent transactions in past 3 months include: On 09/22/2025, sold 8000 units for $2395945.60;