AJG

SEC source: 0001127602-24-016707 · form4.xml · nonDerivative · entry 2

GALLAGHER J PATRICK JR · CIK 0001186006 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Indirect · By Spouse

Disclosed balance after: 271,057

F1 · ownership.nature: Shares held in revocable trust of which my spouse is sole Trustee and as to which I disclaim beneficial ownership.

SEC source: 0001127602-24-016707 · form4.xml · nonDerivative · entry 1

GALLAGHER J PATRICK JR · CIK 0001186006 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 159,527.1857

SEC source: 0001127602-24-016592 · form4.xml · nonDerivative · entry 1

JOHNSON DAVID S · CIK 0001192476 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 45,108

SEC source: 0001127602-24-016050 · form4.xml · derivative · entry 13

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 800 shares

Expires 2025-03-15

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_date: One-third of this stock option becomes exerciseable on each of the 3rd, 4th, and 5th anniversaries of the grant date.

SEC source: 0001127602-24-016050 · form4.xml · nonDerivative · entry 9

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 44,691

SEC source: 0001127602-24-016050 · form4.xml · nonDerivative · entry 8

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 45,491

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001127602-24-016050 · form4.xml · derivative · entry 12

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 800

Underlying: Common Stock · 8,717 shares

Expires 2025-03-15

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_date: One-third of this stock option becomes exerciseable on each of the 3rd, 4th, and 5th anniversaries of the grant date.

SEC source: 0001127602-24-016050 · form4.xml · nonDerivative · entry 7

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 44,691

F4 · price: The price reported is an average weighted price. The shares were sold in multiple transactions on 5/17/2024 at prices ranging from $258.05 to $258.16.

SEC source: 0001127602-24-016050 · form4.xml · nonDerivative · entry 6

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 45,077

F3 · price: The price reported is an average weighted price. The shares were sold in multiple transactions on 5/17/2024 at prices ranging from $257.01 to $257.97.

SEC source: 0001127602-24-016050 · form4.xml · nonDerivative · entry 5

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 49,545

F2 · price: The price reported is an average weighted price. The shares were sold in multiple transactions on 5/17/2024 at prices ranging from $256.00 to $256.92. The reporting person will provide to the Securities and Exchange Commission staff, the issuer, or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in the footnotes to this Form 4.

SEC source: 0001127602-24-016050 · form4.xml · nonDerivative · entry 4

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 53,408

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001127602-24-016149 · form4.xml · nonDerivative · entry 1

HOWELL DOUGLAS K · CIK 0001222374 · VP & Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 75,851.5662

F1 · price: The price reported is an average weighted price. The shares were sold in multiple transactions on 5/17/2024 at prices ranging from $257.00 to $257.13. The reporting person will provide to the Securities and Exchange Commission staff, the issuer, or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001127602-24-016052 · form4.xml · derivative · entry 8

CARY RICHARD C · CIK 0001185998 · Controller, CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,349

Underlying: Common Stock · 1,176 shares

Expires 2028-03-16

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_date: One-third of this stock option becomes exerciseable on each of the 3rd, 4th, and 5th anniversaries of the grant date.

SEC source: 0001127602-24-016052 · form4.xml · derivative · entry 7

CARY RICHARD C · CIK 0001185998 · Controller, CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,219

Underlying: Common Stock · 1,220 shares

Expires 2027-03-12

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_date: One-third of this stock option becomes exerciseable on each of the 3rd, 4th, and 5th anniversaries of the grant date.

SEC source: 0001127602-24-016052 · form4.xml · derivative · entry 6

CARY RICHARD C · CIK 0001185998 · Controller, CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 999 shares

Expires 2026-03-14

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_date: One-third of this stock option becomes exerciseable on each of the 3rd, 4th, and 5th anniversaries of the grant date.

SEC source: 0001127602-24-016052 · form4.xml · nonDerivative · entry 4

CARY RICHARD C · CIK 0001185998 · Controller, CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,313.75

SEC source: 0001127602-24-016052 · form4.xml · nonDerivative · entry 3

CARY RICHARD C · CIK 0001185998 · Controller, CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 41,708.75

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001127602-24-016052 · form4.xml · nonDerivative · entry 2

CARY RICHARD C · CIK 0001185998 · Controller, CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 40,532.75

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001127602-24-016052 · form4.xml · nonDerivative · entry 1

CARY RICHARD C · CIK 0001185998 · Controller, CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 39,312.75

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001127602-24-016050 · form4.xml · derivative · entry 11

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,517

Underlying: Common Stock · 7,283 shares

Expires 2025-03-15

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_date: One-third of this stock option becomes exerciseable on each of the 3rd, 4th, and 5th anniversaries of the grant date.

SEC source: 0001127602-24-016050 · form4.xml · nonDerivative · entry 3

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 44,691

F1 · price: The price reported is an average weighted price. The shares were sold in multiple transactions on 5/16/2024 at prices ranging from $256.00 to $256.28. The reporting person will provide to the Securities and Exchange Commission staff, the issuer, or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001127602-24-016050 · form4.xml · nonDerivative · entry 2

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 59,550

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001127602-24-016050 · form4.xml · nonDerivative · entry 1

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 51,974

SEC source: 0001127602-24-015296 · form4.xml · nonDerivative · entry 2

HOWELL DOUGLAS K · CIK 0001222374 · VP & Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 80,951.5662

F2 · price: The price reported is an average weighted price. The shares were sold in multiple transactions on 5/10/2024 at prices ranging from $250.29 to $250.46.

SEC source: 0001127602-24-015296 · form4.xml · nonDerivative · entry 1

HOWELL DOUGLAS K · CIK 0001222374 · VP & Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 82,959.5662

F1 · price: The price reported is an average weighted price. The shares were sold in multiple transactions on 5/10/2024 at prices ranging from $248.00 to $248.66. The reporting person will provide to the Securities and Exchange Commission staff, the issuer, or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in the footnotes to this Form 4.

SEC source: 0001127602-24-015137 · form4.xml · nonDerivative · entry 2

BARRAT SHERRY S · CIK 0001182700 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,757.561

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001127602-24-015137 · form4.xml · nonDerivative · entry 1

BARRAT SHERRY S · CIK 0001182700 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 850

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · security: Restricted stock unit award vesting on the earlier of one year after the date of grant or the reporting person's departure from the Board.

SEC source: 0001127602-24-015151 · form4.xml · nonDerivative · entry 2

Miskel Christopher C. · CIK 0001804681 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,091.168

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001127602-24-015151 · form4.xml · nonDerivative · entry 1

Miskel Christopher C. · CIK 0001804681 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 850.6

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · security: Restricted stock unit award vesting on the earlier of one year after the date of grant or the reporting person's departure from the Board.

SEC source: 0001127602-24-015149 · form4.xml · nonDerivative · entry 2

NICOLETTI RALPH J · CIK 0001192519 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,469.088

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001127602-24-015149 · form4.xml · nonDerivative · entry 1

NICOLETTI RALPH J · CIK 0001192519 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 850

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · security: Restricted stock unit award vesting on the earlier of one year after the date of grant or the reporting person's departure from the Board.

SEC source: 0001127602-24-015147 · form4.xml · nonDerivative · entry 2

ROSENTHAL NORMAN L · CIK 0001137113 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 39,976.819

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001127602-24-015147 · form4.xml · nonDerivative · entry 1

ROSENTHAL NORMAN L · CIK 0001137113 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 850

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · security: Restricted stock unit award vesting on the earlier of one year after the date of grant or the reporting person's departure from the Board.

SEC source: 0001127602-24-015145 · form4.xml · nonDerivative · entry 2

JOHNSON DAVID S · CIK 0001192476 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 45,958

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001127602-24-015145 · form4.xml · nonDerivative · entry 1

JOHNSON DAVID S · CIK 0001192476 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 850

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · security: Restricted stock unit award vesting on the earlier of one year after the date of grant or the reporting person's departure from the Board.

SEC source: 0001127602-24-015143 · form4.xml · nonDerivative · entry 2

Coldman David John · CIK 0001626207 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,694

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001127602-24-015143 · form4.xml · nonDerivative · entry 1

Coldman David John · CIK 0001626207 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 850

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · security: Restricted stock unit award vesting on the earlier of one year after the date of grant or the reporting person's departure from the Board.

SEC source: 0001127602-24-015141 · form4.xml · nonDerivative · entry 2

Clarke Teresa Hillary · CIK 0001875332 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,880.002

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001127602-24-015141 · form4.xml · nonDerivative · entry 1

Clarke Teresa Hillary · CIK 0001875332 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 850

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · security: Restricted stock unit award vesting on the earlier of one year after the date of grant or the reporting person's departure from the Board.

SEC source: 0001127602-24-014876 · form4.xml · nonDerivative · entry 1

BARRAT SHERRY S · CIK 0001182700 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,770

F1 · security: Restricted stock unit award vesting on the earlier of one year after the date of grant or the reporting person's departure from the Board.

F1 · shares: Restricted stock unit award vesting on the earlier of one year after the date of grant or the reporting person's departure from the Board.

SEC source: 0001127602-24-014880 · form4.xml · nonDerivative · entry 2

BAX WILLIAM L · CIK 0001247335 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 47,903.812

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001127602-24-014880 · form4.xml · nonDerivative · entry 1

BAX WILLIAM L · CIK 0001247335 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · security: Restricted stock unit award vesting on the earlier of one year after the date of grant or the reporting person's departure from the Board.

SEC source: 0001127602-24-014878 · form4.xml · nonDerivative · entry 1

NICOLETTI RALPH J · CIK 0001192519 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,770

F1 · security: Restricted stock unit award vesting on the earlier of one year after the date of grant or the reporting person's departure from the Board.

F1 · shares: Restricted stock unit award vesting on the earlier of one year after the date of grant or the reporting person's departure from the Board.

SEC source: 0001127602-24-014873 · form4.xml · nonDerivative · entry 1

ROSENTHAL NORMAN L · CIK 0001137113 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,770

F1 · security: Restricted stock unit award vesting on the earlier of one year after the date of grant or the reporting person's departure from the Board.

F1 · shares: Restricted stock unit award vesting on the earlier of one year after the date of grant or the reporting person's departure from the Board.

SEC source: 0001127602-24-014871 · form4.xml · nonDerivative · entry 1

Clarke Teresa Hillary · CIK 0001875332 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,770

F1 · shares: Restricted stock unit award vesting on the earlier of one year after the date of grant or the reporting person's departure from the Board.

SEC source: 0001127602-24-014863 · form4.xml · nonDerivative · entry 1

Coldman David John · CIK 0001626207 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,770

F1 · security: Restricted stock unit award vesting on the earlier of one year after the date of grant or the reporting person's departure from the Board.

F1 · shares: Restricted stock unit award vesting on the earlier of one year after the date of grant or the reporting person's departure from the Board.

SEC source: 0001127602-24-014865 · form4.xml · nonDerivative · entry 1

JOHNSON DAVID S · CIK 0001192476 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,770

F1 · security: Restricted stock unit award vesting on the earlier of one year after the date of grant or the reporting person's departure from the Board.

F1 · shares: Restricted stock unit award vesting on the earlier of one year after the date of grant or the reporting person's departure from the Board.

SEC source: 0001127602-24-014861 · form4.xml · nonDerivative · entry 1

Miskel Christopher C. · CIK 0001804681 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,770.6

F1 · shares: Restricted stock unit award vesting on the earlier of one year after the date of grant or the reporting person's departure from the Board.

SEC source: 0001127602-24-014849 · form4.xml · nonDerivative · entry 1

Caplan Deborah H · CIK 0001574454 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 850

F1 · shares: Restricted stock unit award vesting on the earlier of one year after the date of grant or the reporting person's departure from the Board.

SEC source: 0001127602-24-014347 · form4.xml · derivative · entry 4

Hudson Scott R · CIK 0001482241 · Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,046.577

Underlying: Common Stock · 3,906.653 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each share of phantom stock represents a right to receive one share of Gallagher common stock.

F2 · derivative.exercise_date: 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.

F2 · derivative.expiration_date: 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.