Patrick Murphy Gallagher - 10 May 2022 Form 3 Insider Report for Arthur J. Gallagher & Co. (AJG)

Footnote F1

Shares held in trust for the benefit of the reporting person's children, of which he is a trustee.

Footnote F2

Shares held in trust for the benefit of the reporting person's children, of which he is a trustee.

Footnote F3

Shares held in trusts, for the benefit of the reporting person's children, of which his wife is sole trustee.

Footnote F4

Shares held in revocable trust of which the reporting person's spouse is sole Trustee and as to which he disclaims beneficial ownership.

Footnote F5

These shares represent awards under the Age 62 Plan, a nonqualified deferred compensation plan of the Company, which have been deemed invested in Company common stock at the election of the reporting person. Participants vest in these awards when they attain age 62, or after a one-year period for participants who have attained age 61.

Footnote F6

Each share of phantom stock represents a right to receive one share of Gallagher common stock.

Footnote F7

These shares represent awards under the Deferred Cash Participation Plan, a nonqualified deferred compensation plan of the Company, which have been deemed invested in Company common stock at the election of the participant. These awards are payable in a lump sum on the six-month anniversary of the reporting person's separation from service.

Footnote F8

Grant date of 3/17/2016.

Footnote F9

One-third of this stock option becomes exerciseable on each of the 3rd, 4th, and 5th anniversaries of the grant date.

Footnote F10

Grant date of 3/16/2017.

Footnote F11

Grant date of 3/15/2018.

Footnote F12

Grant date of 3/14/2019.

Footnote F13

Grant date of 3/12/2020.

Footnote F14

Grant date of 3/16/2021.

Footnote F15

Grant date of 3/15/2022.