Transaction Details

Footnotes

Represents the number of shares withheld by the Company as a result of the net exercise of stock options and used to pay the exercise price and required tax withholdings. | The reporting person disclaims beneficial ownership of these shares, and this report shall not be deemed an admission that the reporting person is the beneficial owner of these shares for purposes of Section 16 or for any other purpose. | These shares are held in trusts, for the benefit of the reporting person's children, of which his wife is a trustee. | One-third of this stock option becomes exerciseable on each of the 3rd, 4th, and 5th anniversaries of the grant date. | One-third of this stock option becomes exerciseable on each of the 3rd, 4th, and 5th anniversaries of the grant date. | One-third of this stock option becomes exercisable on each of the 3rd, 4th, and 5th anniversaries of the grant date. | Closing price of Gallagher common stock on February 28, 2025. | One-third of this stock option becomes exerciseable on each of the 3rd, 4th, and 5th anniversaries of the grant date. | Each notional stock unit represents a right to receive one share of Gallagher common stock. | Portions of these notional stock units are payable to the reporting person in shares of common stock in July of 2025 and 2026 and following the reporting person's separation from service.