Arthur J. Gallagher & Co. Officer Files Form 144 to Sell $7.7M in Common Stock

Insider Filing Analysis: Form 144

Arthur J. Gallagher & Co. ($AJG) officer Douglas K. Howell has filed a Form 144 notice disclosing an intention to sell up to 27,996 shares of common stock with an estimated aggregate market value of $7,702,773.77 through Fidelity Brokerage Services LLC, with an approximate sale date of November 2, 2026.

Key Details:

• Filer: Douglas K. Howell
• Role: Officer
• Shares Proposed for Sale: 27,996
• Implied Price Per Share: ~$275.14
• Total Market Value: $7,702,773.77
• Shares Outstanding: 256,300,000 (~0.01% of total outstanding)

Acquisition History:

The shares designated for sale were acquired via multiple compensation-related events:

• 17,130 shares acquired on 11/02/2026 via Stock Option Exercise.
• 5,462 shares acquired on 03/13/2026 via Stock Option Exercise.
• 5,217 shares acquired on 03/15/2026 via Restricted Stock Vesting.
• 97 shares acquired on 03/31/2026 via ESPP Purchase.
• 90 shares acquired on 03/14/2025 via Stock Option Exercise.

Trading Significance:

• Medium Significance: While the transaction size is notable at $7.7M, the sale accounts for approximately 0.01% of outstanding shares and is directly tied to the exercise of stock options and vesting of equity-based compensation.