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Bay Walter D.

Disclosed activity across 1 company

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19684
SEC CIK
0001410235

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
Arthur J. Gallagher & Co.AJG · Entity 990General CounselAugust 24, 2026August 26, 2026

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

Arthur J. Gallagher & Co.

Report date August 24, 2026 · Filed August 26, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect71,292.092 Reported balance After 2026-08-24 transaction · row 1
1 source row

Row 1 · 2026-08-24 · Sale · Disposed 12,000 · Balance 71,292.092

F1: The price reported is an average weighted price. The shares were sold in multiple transactions on 8/24/2026 at prices ranging from $270.01 to $270.17. 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.

Common StockSEC Table I · non-derivativeIndirectGallagher 401(k) plan account491.129 Reported balance Holding disclosure · report date 2026-08-24 · row 2 Holding and transaction disclosures are not merged.
1 source row

Row 2 · Balance 491.129

Non-qualified Stock OptionSEC Table II · derivative / convertible security · Conversion / exercise price $127.90 · Expires 2028-03-16Direct24,500 Reported balance Holding disclosure · report date 2026-08-24 · row 3 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 3 · Balance 24,500

F2: One-third of this stock option becomes exerciseable on each of the 3rd, 4th, and 5th anniversaries of the grant date.

Non-qualified Stock OptionSEC Table II · derivative / convertible security · Conversion / exercise price $86.17 · Expires 2027-03-12Direct17,630 Reported balance Holding disclosure · report date 2026-08-24 · row 4 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 4 · Balance 17,630

F2: One-third of this stock option becomes exerciseable on each of the 3rd, 4th, and 5th anniversaries of the grant date.

Non-qualified Stock OptionSEC Table II · derivative / convertible security · Conversion / exercise price $228.20 · Expires 2033-03-01Direct16,952 Reported balance Holding disclosure · report date 2026-08-24 · row 5 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 5 · Balance 16,952

F3: One-third of this stock option becomes exercisable on each of the 3rd, 4th, and 5th anniversaries of the grant date.

Non-qualified Stock OptionSEC Table II · derivative / convertible security · Conversion / exercise price $158.56 · Expires 2029-03-15Direct11,405 Reported balance Holding disclosure · report date 2026-08-24 · row 6 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 6 · Balance 11,405

F2: One-third of this stock option becomes exerciseable on each of the 3rd, 4th, and 5th anniversaries of the grant date.

Non-qualified Stock OptionSEC Table II · derivative / convertible security · Conversion / exercise price $337.74 · Expires 2032-03-01Direct11,350 Reported balance Holding disclosure · report date 2026-08-24 · row 7 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 7 · Balance 11,350

F4: Closing price of Gallagher common stock on February 28, 2025.

F2: One-third of this stock option becomes exerciseable on each of the 3rd, 4th, and 5th anniversaries of the grant date.

Non-qualified Stock OptionSEC Table II · derivative / convertible security · Conversion / exercise price $243.54 · Expires 2031-03-01Direct10,884 Reported balance Holding disclosure · report date 2026-08-24 · row 8 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 8 · Balance 10,884

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

Non-qualified Stock OptionSEC Table II · derivative / convertible security · Conversion / exercise price $177.09 · Expires 2030-03-15Direct9,452 Reported balance Holding disclosure · report date 2026-08-24 · row 9 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 9 · Balance 9,452

F6: One-third of this stock option becomes exercisable on each of the 3rd, 4th, and 5th anniversaries of the grant date.

Notional Stock UnitsSEC Table II · derivative / convertible security · Conversion / exercise price $0.00Direct5,828.5456 Reported balance Holding disclosure · report date 2026-08-24 · row 10 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 10 · Balance 5,828.5456

F7: Each notional stock unit represents a right to receive one share of Gallagher common stock.

F8: The notional stock units become payable in July 2026 and following the reporting person's separation from service with Gallagher.

Phantom StockSEC Table II · derivative / convertible securityDirect4,007.175 Reported balance Holding disclosure · report date 2026-08-24 · row 11 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 11 · Balance 4,007.175

F9: Each share of phantom stock represents a right to receive one share of Gallagher common stock.

F10: 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 in the year they attain age 62, or after a one-year period for participants who have attained age 61.

Filing footnotes · ownership attribution and instrument terms

F1: The price reported is an average weighted price. The shares were sold in multiple transactions on 8/24/2026 at prices ranging from $270.01 to $270.17. 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.

F2: One-third of this stock option becomes exerciseable on each of the 3rd, 4th, and 5th anniversaries of the grant date.

F3: One-third of this stock option becomes exercisable on each of the 3rd, 4th, and 5th anniversaries of the grant date.

F4: Closing price of Gallagher common stock on February 28, 2025.

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

F6: One-third of this stock option becomes exercisable on each of the 3rd, 4th, and 5th anniversaries of the grant date.

F7: Each notional stock unit represents a right to receive one share of Gallagher common stock.

F8: The notional stock units become payable in July 2026 and following the reporting person's separation from service with Gallagher.

F9: Each share of phantom stock represents a right to receive one share of Gallagher common stock.

F10: 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 in the year they attain age 62, or after a one-year period for participants who have attained age 61.

Transaction history

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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
March 14, 2024 Filed Mar 19, 2024 01:42 UTC Arthur J. Gallagher & Co. AJG · Entity 990 Tax withholdingCommon Stock 980 $254.91 $249,811.80
Disclosure

SEC source: 0001127602-24-010524 · form4.xml · nonDerivative · entry 3

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 47,211

Read SEC document
March 14, 2024 Filed Mar 19, 2024 01:42 UTC Arthur J. Gallagher & Co. AJG · Entity 990 Exercise / conversionCommon Stock 3,500 $0.00 $0.00
Disclosure

SEC source: 0001127602-24-010524 · form4.xml · nonDerivative · entry 2

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 48,191

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.

Read SEC document
March 14, 2024 Filed Mar 19, 2024 01:42 UTC Arthur J. Gallagher & Co. AJG · Entity 990 Exercise / conversionCommon Stock (restricted) 3,500 $0.00 $0.00
Disclosure

SEC source: 0001127602-24-010524 · form4.xml · nonDerivative · entry 1

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,250

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.

Read SEC document
March 04, 2024 Filed Mar 5, 2024 23:45 UTC Arthur J. Gallagher & Co. AJG · Entity 990 OtherPhantom Stock · Derivative 1,850.86 $243.13 $449,999.59
Disclosure

SEC source: 0001127602-24-008706 · form4.xml · derivative · entry 2

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 95,742.999

Underlying: Common Stock · 1,850.86 shares

Expires not disclosed

F2 · derivative.exercise_price: Each share of phantom stock represents a right to receive one share of Gallagher common stock.

F3 · 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.

F3 · 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.

Read SEC document
March 01, 2024 Filed Mar 5, 2024 23:45 UTC Arthur J. Gallagher & Co. AJG · Entity 990 GrantNon-qualified Stock Option · Derivative 10,884 $0.00 Strike: $243.54 $0.00
Disclosure

SEC source: 0001127602-24-008706 · form4.xml · derivative · entry 1

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,884

Underlying: Common Stock · 10,884 shares

Expires 2031-03-01

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

Read SEC document
September 15, 2023 Filed Sep 20, 2023 01:07 UTC Arthur J. Gallagher & Co. AJG · Entity 990 Exercise / conversionNon-qualified Stock Option · Derivative 21,800 $0.00 Strike: $56.86 $0.00
Disclosure

SEC source: 0001127602-23-024486 · form4.xml · derivative · entry 4

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 21,800 shares

Expires 2024-03-16

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.

F2 · derivative.exercise_date: One-third of this stock option becomes exerciseable on each of the 3rd, 4th, and 5th anniversaries of the grant date.

Read SEC document
September 15, 2023 Filed Sep 20, 2023 01:07 UTC Arthur J. Gallagher & Co. AJG · Entity 990 SaleCommon Stock 21,800 $232.00 $5,057,600.00
Disclosure

SEC source: 0001127602-23-024486 · 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 at prices ranging from $232.00 to $232.07. 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.

Read SEC document
September 15, 2023 Filed Sep 20, 2023 01:07 UTC Arthur J. Gallagher & Co. AJG · Entity 990 Exercise / conversionCommon Stock 21,800 $56.86 $1,239,548.00
Disclosure

SEC source: 0001127602-23-024486 · form4.xml · nonDerivative · entry 2

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 66,491

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.

Read SEC document
March 15, 2023 Filed Mar 17, 2023 23:41 UTC Arthur J. Gallagher & Co. AJG · Entity 990 GrantNon-qualified Stock Option · Derivative 9,452 $0.00 Strike: $177.09 $0.00
Disclosure

SEC source: 0001127602-23-010768 · form4.xml · derivative · entry 5

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,452

Underlying: Common Stock · 9,452 shares

Expires 2030-03-15

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.

Read SEC document
March 15, 2023 Filed Mar 17, 2023 23:41 UTC Arthur J. Gallagher & Co. AJG · Entity 990 Tax withholdingCommon Stock 1,773 $177.09 $313,980.57
Disclosure

SEC source: 0001127602-23-010768 · form4.xml · nonDerivative · entry 4

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 44,691

Read SEC document
March 15, 2023 Filed Mar 17, 2023 23:41 UTC Arthur J. Gallagher & Co. AJG · Entity 990 Exercise / conversionCommon Stock 4,000 $0.00 $0.00
Disclosure

SEC source: 0001127602-23-010768 · form4.xml · nonDerivative · entry 3

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 46,464

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.

Read SEC document
March 15, 2023 Filed Mar 17, 2023 23:41 UTC Arthur J. Gallagher & Co. AJG · Entity 990 Exercise / conversionCommon Stock (restricted) 4,000 $0.00 $0.00
Disclosure

SEC source: 0001127602-23-010768 · form4.xml · nonDerivative · entry 1

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,750

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.

Read SEC document
March 12, 2023 Filed Mar 15, 2023 01:17 UTC Arthur J. Gallagher & Co. AJG · Entity 990 Tax withholdingCommon Stock 3,530 $182.76 $645,142.80
Disclosure

SEC source: 0001127602-23-010190 · form4.xml · nonDerivative · entry 4

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 42,464

Read SEC document
March 12, 2023 Filed Mar 15, 2023 01:17 UTC Arthur J. Gallagher & Co. AJG · Entity 990 Exercise / conversionCommon Stock 9,800 $0.00 $0.00
Disclosure

SEC source: 0001127602-23-010190 · form4.xml · nonDerivative · entry 3

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 45,994

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.

Read SEC document
March 12, 2023 Filed Mar 15, 2023 01:17 UTC Arthur J. Gallagher & Co. AJG · Entity 990 Exercise / conversionCommon Stock (restricted) 9,800 $0.00 $0.00
Disclosure

SEC source: 0001127602-23-010190 · form4.xml · nonDerivative · entry 2

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,750

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.

Read SEC document
March 12, 2023 Filed Mar 15, 2023 01:17 UTC Arthur J. Gallagher & Co. AJG · Entity 990 GrantCommon Stock (restricted) 9,800 $0.00 $0.00
Disclosure

SEC source: 0001127602-23-010190 · form4.xml · nonDerivative · entry 1

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,550

F1 · shares: Performance share units (awarded on March 12, 2020) earned and vested as of March 12, 2023.

Read SEC document
March 10, 2023 Filed Mar 15, 2023 01:17 UTC Arthur J. Gallagher & Co. AJG · Entity 990 OtherPhantom Stock · Derivative 3,630 $185.95 $674,998.50
Disclosure

SEC source: 0001127602-23-010190 · form4.xml · derivative · entry 6

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 92,933.074

Underlying: Common Stock · 3,630 shares

Expires not disclosed

F2 · derivative.exercise_price: Each share of phantom stock represents a right to receive one share of Gallagher common stock.

F3 · shares: 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.

F3 · 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.

F3 · 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.

Read SEC document
December 29, 2022 Filed Feb 10, 2023 23:31 UTC Arthur J. Gallagher & Co. AJG · Entity 990 GiftCommon Stock 2,023 $0.00 $0.00
Disclosure

SEC source: 0001127602-23-004559 · form5.xml · nonDerivative · entry 1

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 36,194

Read SEC document
August 10, 2022 Filed Aug 11, 2022 21:27 UTC Arthur J. Gallagher & Co. AJG · Entity 990 Exercise / conversionNon-qualified Stock Option · Derivative 5,100 $0.00 Strike: $43.71 $0.00
Disclosure

SEC source: 0001127602-22-020843 · form4.xml · derivative · entry 7

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 5,100 shares

Expires 2023-03-17

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.

Read SEC document
August 10, 2022 Filed Aug 11, 2022 21:27 UTC Arthur J. Gallagher & Co. AJG · Entity 990 SaleCommon Stock 5,100 $185.00 $943,500.00
Disclosure

SEC source: 0001127602-22-020843 · form4.xml · nonDerivative · entry 4

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 33,117

Read SEC document
August 10, 2022 Filed Aug 11, 2022 21:27 UTC Arthur J. Gallagher & Co. AJG · Entity 990 Exercise / conversionCommon Stock 5,100 $43.71 $222,921.00
Disclosure

SEC source: 0001127602-22-020843 · form4.xml · nonDerivative · entry 3

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 38,217

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.

Read SEC document
August 09, 2022 Filed Aug 11, 2022 21:27 UTC Arthur J. Gallagher & Co. AJG · Entity 990 Exercise / conversionNon-qualified Stock Option · Derivative 5,100 $0.00 Strike: $43.71 $0.00
Disclosure

SEC source: 0001127602-22-020843 · form4.xml · derivative · entry 6

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,100

Underlying: Common Stock · 5,100 shares

Expires 2023-03-17

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.

Read SEC document
August 09, 2022 Filed Aug 11, 2022 21:27 UTC Arthur J. Gallagher & Co. AJG · Entity 990 SaleCommon Stock 5,100 $181.00 $923,100.00
Disclosure

SEC source: 0001127602-22-020843 · form4.xml · nonDerivative · entry 2

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 38,217

Read SEC document
August 09, 2022 Filed Aug 11, 2022 21:27 UTC Arthur J. Gallagher & Co. AJG · Entity 990 Exercise / conversionCommon Stock 5,100 $43.71 $222,921.00
Disclosure

SEC source: 0001127602-22-020843 · form4.xml · nonDerivative · entry 1

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 43,317

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.

Read SEC document
March 16, 2022 Filed Mar 17, 2022 00:19 UTC Arthur J. Gallagher & Co. AJG · Entity 990 OtherPhantom Stock · Derivative 2,843.4 $158.26 $449,996.48
Disclosure

SEC source: 0001127602-22-009540 · form4.xml · derivative · entry 13

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 88,245.259

Underlying: Common Stock · 2,843.4 shares

Expires not disclosed

F3 · derivative.exercise_price: Each share of phantom stock represents a right to receive one share of Gallagher common stock.

F4 · shares: 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.

F4 · 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.

F4 · 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.

Read SEC document
March 16, 2022 Filed Mar 17, 2022 00:19 UTC Arthur J. Gallagher & Co. AJG · Entity 990 Exercise / conversionNon-qualified Stock Option · Derivative 7,500 $0.00 Strike: $43.71 $0.00
Disclosure

SEC source: 0001127602-22-009540 · form4.xml · derivative · entry 12

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,200

Underlying: Common Stock · 7,500 shares

Expires 2023-03-17

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.

F2 · derivative.exercise_date: One-third of this stock option becomes exerciseable on each of the 3rd, 4th, and 5th anniversaries of the grant date.

Read SEC document
March 16, 2022 Filed Mar 17, 2022 00:19 UTC Arthur J. Gallagher & Co. AJG · Entity 990 Tax withholdingCommon Stock 2,015 $162.67 $327,780.05
Disclosure

SEC source: 0001127602-22-009540 · form4.xml · nonDerivative · entry 9

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 38,215

Read SEC document
March 16, 2022 Filed Mar 17, 2022 00:19 UTC Arthur J. Gallagher & Co. AJG · Entity 990 Exercise / conversionCommon Stock 4,550 $0.00 $0.00
Disclosure

SEC source: 0001127602-22-009540 · form4.xml · nonDerivative · entry 8

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 40,230

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.

Read SEC document
March 16, 2022 Filed Mar 17, 2022 00:19 UTC Arthur J. Gallagher & Co. AJG · Entity 990 Exercise / conversionCommon Stock (restricted) 4,550 $0.00 $0.00
Disclosure

SEC source: 0001127602-22-009540 · form4.xml · nonDerivative · entry 7

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,750

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.

Read SEC document
March 16, 2022 Filed Mar 17, 2022 00:19 UTC Arthur J. Gallagher & Co. AJG · Entity 990 SaleCommon Stock 7,500 $162.00 $1,215,000.00
Disclosure

SEC source: 0001127602-22-009540 · form4.xml · nonDerivative · entry 6

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 35,680

Read SEC document
March 16, 2022 Filed Mar 17, 2022 00:19 UTC Arthur J. Gallagher & Co. AJG · Entity 990 Exercise / conversionCommon Stock 7,500 $43.71 $327,825.00
Disclosure

SEC source: 0001127602-22-009540 · form4.xml · nonDerivative · entry 5

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 43,180

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.

Read SEC document
March 15, 2022 Filed Mar 17, 2022 00:19 UTC Arthur J. Gallagher & Co. AJG · Entity 990 GrantNon-qualified Stock Option · Derivative 11,405 $0.00 Strike: $158.56 $0.00
Disclosure

SEC source: 0001127602-22-009540 · form4.xml · derivative · entry 11

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,405

Underlying: Common Stock · 11,405 shares

Expires 2029-03-15

F2 · derivative.exercise_date: One-third of this stock option becomes exerciseable on each of the 3rd, 4th, and 5th anniversaries of the grant date.

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March 14, 2022 Filed Mar 17, 2022 00:19 UTC Arthur J. Gallagher & Co. AJG · Entity 990 Tax withholdingCommon Stock 2,819 $154.74 $436,212.06
Disclosure

SEC source: 0001127602-22-009540 · form4.xml · nonDerivative · entry 4

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 35,680

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March 14, 2022 Filed Mar 17, 2022 00:19 UTC Arthur J. Gallagher & Co. AJG · Entity 990 Exercise / conversionCommon Stock 8,450 $0.00 $0.00
Disclosure

SEC source: 0001127602-22-009540 · form4.xml · nonDerivative · entry 3

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 38,499

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.

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March 14, 2022 Filed Mar 17, 2022 00:19 UTC Arthur J. Gallagher & Co. AJG · Entity 990 Exercise / conversionCommon Stock (restricted) 8,450 $0.00 $0.00
Disclosure

SEC source: 0001127602-22-009540 · form4.xml · nonDerivative · entry 2

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,300

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.

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March 14, 2022 Filed Mar 17, 2022 00:19 UTC Arthur J. Gallagher & Co. AJG · Entity 990 GrantCommon Stock (restricted) 8,450 $0.00 $0.00
Disclosure

SEC source: 0001127602-22-009540 · form4.xml · nonDerivative · entry 1

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,750

F1 · shares: Performance share units (awarded on March 14, 2019) earned and vested as of March 14, 2022.

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February 23, 2022 Filed Feb 26, 2022 00:02 UTC Arthur J. Gallagher & Co. AJG · Entity 990 GrantNotional Stock Units · Derivative 525.67 $153.73 Strike: $0.00 $80,811.25
Disclosure

SEC source: 0001127602-22-006874 · form4.xml · derivative · entry 1

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,736.87

Underlying: Common Stock · 525.67 shares

Expires not disclosed

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

F2 · derivative.exercise_date: The notional stock units become payable following the reporting person's separation from service with Gallagher.

F2 · derivative.expiration_date: The notional stock units become payable following the reporting person's separation from service with Gallagher.

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January 31, 2022 Filed Feb 2, 2022 22:26 UTC Arthur J. Gallagher & Co. AJG · Entity 990 OtherNotional Stock Units · Derivative 2,316 $157.94 Strike: $0.00 $365,789.04
Disclosure

SEC source: 0001127602-22-003023 · form4.xml · derivative · entry 1

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,211.2

Underlying: Common Stock · 2,316 shares

Expires not disclosed

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

F2 · shares: Acquisition arising from the reporting person's reallocation of funds held in the Supplemental Savings and Thrift Plan into the fund representing Gallagher common stock.

F3 · derivative.exercise_date: The notional stock units become payable following the reporting person's separation from service with Gallagher.

F3 · derivative.expiration_date: The notional stock units become payable following the reporting person's separation from service with Gallagher.

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December 17, 2021 Filed Dec 18, 2021 00:46 UTC Arthur J. Gallagher & Co. AJG · Entity 990 OtherNotional Stock Units · Derivative 1,139.3 $164.40 Strike: $0.00 $187,300.92
Disclosure

SEC source: 0001127602-21-031477 · form4.xml · derivative · entry 2

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,893.4

Underlying: Common Stock · 1,139.3 shares

Expires not disclosed

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

F2 · shares: Acquisition arising from the reporting person's reallocation of funds held in the Supplemental Savings and Thrift Plan into the fund representing Gallagher common stock.

F3 · derivative.exercise_date: The notional stock units become payable following the reporting person's separation from service with Gallagher.

F3 · derivative.expiration_date: The notional stock units become payable following the reporting person's separation from service with Gallagher.

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December 15, 2021 Filed Dec 18, 2021 00:46 UTC Arthur J. Gallagher & Co. AJG · Entity 990 OtherNotional Stock Units · Derivative 1,873.5 $166.62 Strike: $0.00 $312,162.57
Disclosure

SEC source: 0001127602-21-031477 · form4.xml · derivative · entry 1

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,754.1

Underlying: Common Stock · 1,873.5 shares

Expires not disclosed

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

F2 · shares: Acquisition arising from the reporting person's reallocation of funds held in the Supplemental Savings and Thrift Plan into the fund representing Gallagher common stock.

F3 · derivative.exercise_date: The notional stock units become payable following the reporting person's separation from service with Gallagher.

F3 · derivative.expiration_date: The notional stock units become payable following the reporting person's separation from service with Gallagher.

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March 17, 2021 Filed Mar 18, 2021 22:40 UTC Arthur J. Gallagher & Co. AJG · Entity 990 OtherPhantom Stock · Derivative 3,531.6 $127.42 $449,996.47
Disclosure

SEC source: 0001127602-21-011469 · form4.xml · derivative · entry 6

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 83,992.7

Underlying: Common Stock · 3,531.6 shares

Expires not disclosed

F2 · derivative.exercise_price: Each share of phantom stock represents a right to receive one share of Gallagher common stock.

F3 · 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.

F3 · 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.

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March 17, 2021 Filed Mar 18, 2021 22:40 UTC Arthur J. Gallagher & Co. AJG · Entity 990 Tax withholdingCommon Stock 2,245 $128.43 $288,325.35
Disclosure

SEC source: 0001127602-21-011469 · form4.xml · nonDerivative · entry 3

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 30,049

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March 17, 2021 Filed Mar 18, 2021 22:40 UTC Arthur J. Gallagher & Co. AJG · Entity 990 Exercise / conversionCommon Stock 5,350 $0.00 $0.00
Disclosure

SEC source: 0001127602-21-011469 · form4.xml · nonDerivative · entry 2

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 32,294

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.

Read SEC document
March 17, 2021 Filed Mar 18, 2021 22:40 UTC Arthur J. Gallagher & Co. AJG · Entity 990 Exercise / conversionCommon Stock (restricted) 5,350 $0.00 $0.00
Disclosure

SEC source: 0001127602-21-011469 · form4.xml · nonDerivative · entry 1

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,850

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.

Read SEC document
March 16, 2021 Filed Mar 18, 2021 22:40 UTC Arthur J. Gallagher & Co. AJG · Entity 990 GrantNon-qualified Stock Option · Derivative 24,500 $0.00 Strike: $127.90 $0.00
Disclosure

SEC source: 0001127602-21-011469 · form4.xml · derivative · entry 5

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 24,500

Underlying: Common Stock · 24,500 shares

Expires 2028-03-16

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.

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March 15, 2021 Filed Mar 18, 2021 00:22 UTC Arthur J. Gallagher & Co. AJG · Entity 990 Tax withholdingCommon Stock 3,178 $127.21 $404,273.38
Disclosure

SEC source: 0001127602-21-011252 · form4.xml · nonDerivative · entry 4

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,944

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March 15, 2021 Filed Mar 18, 2021 00:22 UTC Arthur J. Gallagher & Co. AJG · Entity 990 Exercise / conversionCommon Stock 9,700 $0.00 $0.00
Disclosure

SEC source: 0001127602-21-011252 · form4.xml · nonDerivative · entry 3

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 30,122

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.

Read SEC document
March 15, 2021 Filed Mar 18, 2021 00:22 UTC Arthur J. Gallagher & Co. AJG · Entity 990 Exercise / conversionCommon Stock (restricted) 9,700 $0.00 $0.00
Disclosure

SEC source: 0001127602-21-011252 · form4.xml · nonDerivative · entry 2

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,200

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.

Read SEC document
March 15, 2021 Filed Mar 18, 2021 00:22 UTC Arthur J. Gallagher & Co. AJG · Entity 990 GrantCommon Stock (restricted) 9,700 $0.00 $0.00
Disclosure

SEC source: 0001127602-21-011252 · form4.xml · nonDerivative · entry 1

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 28,900

F1 · shares: Performance share units (awarded on March 15, 2018) earned and vested as of March 15, 2021.

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February 11, 2021 Filed Feb 13, 2021 00:56 UTC Arthur J. Gallagher & Co. AJG · Entity 990 OtherNotional Stock Units · Derivative 2,158.3 $116.33 Strike: $0.00 $251,075.04
Disclosure

SEC source: 0001127602-21-005549 · form4.xml · derivative · entry 1

Bay Walter D. · CIK 0001410235 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,880.6

Underlying: Common Stock · 2,158.3 shares

Expires not disclosed

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

F2 · shares: Acquisition arising from the reporting person's reallocation of funds held in the Supplemental Savings and Thrift Plan into the fund representing Gallagher common stock.

F3 · derivative.exercise_date: The notional stock units become payable following the reporting person's separation from service with Gallagher.

F3 · derivative.expiration_date: The notional stock units become payable following the reporting person's separation from service with Gallagher.

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Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.