GALLAGHER THOMAS JOSEPH (President) exercised options at ARTHUR J. GALLAGHER & CO.

Option exercise — a mechanical event triggered by vesting or expiry. Not a discretionary conviction trade.

M · 1 exercise

GALLAGHER THOMAS JOSEPH

Filed: 7/7/2026ACC: 0000354190-26-000178

InsiderGALLAGHER THOMAS JOSEPHCIK 1589933

→

IssuerARTHUR J. GALLAGHER & CO.CIK 354190

Officer· President

Since Mar 2026

0.00

Net shares

Net seller

$80.8K

Total acquired

Open market trades

0B · 0S

Total transactions

351.94 acquired · 351.94 disposed

Non-Derivative Transactions1

Common Stock

Direct

M · Option Exercise

+351.94

Price / share

$229.57

Trade value

$80.80K

% of position

0.1%

7/1/2026

323.39K→323.74K

Total

Net shares

+351.94

Net value

$80.80K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	7/1/2026	M · Option Exercise	+351.94	$229.57	$80.80K	0.1%	323.39K	323.74K
Total			+351.94		$80.80K

Derivative Transactions1

Notional Stock Units

Direct

M · Option Exercise

Converts to

Common Stock

351.94 shares

−351.94

Strike price

Held after

13.35K

Exercisable

—

7/1/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Notional Stock Units Direct	Common Stock351.94 shares	7/1/2026	M · Option Exercise	−351.94	0	—	13.35K

Non-Derivative Holdings (Post-Transaction)5

Common Stock

Indirect

Shares owned491.14

Common Stock

Indirect

Shares owned62.30K

Common Stock

Indirect

Shares owned119.70K

Common Stock

Indirect

Shares owned31.99K

Common Stock

Indirect

Shares owned96.71K

Total

311.19K indirect311.19K

Security Title	Shares Owned	Ownership Type
Common Stock	491.14	Indirect
Common Stock	62.30K	Indirect
Common Stock	119.70K	Indirect
Common Stock	31.99K	Indirect
Common Stock	96.71K	Indirect
Total	311.19K	311.19K indirect

Derivative Holdings (Post-Transaction)8

Non-qualified Stock Option

Direct

Underlying security

Common Stock

Underlying shares

12.74K

Shares owned

12.74K

Exercise price

177.09

Expiration

—

Exercise window

—

Non-qualified Stock Option

Direct

Underlying security

Common Stock

Underlying shares

15.31K

Shares owned

15.31K

Exercise price

158.56

Expiration

—

Exercise window

—

Phantom Stock

Direct

Underlying security

Common Stock

Underlying shares

20.28K

Shares owned

20.28K

Exercise price

Expiration

—

Exercise window

—

Non-qualified Stock Option

Direct

Underlying security

Common Stock

Underlying shares

22.22K

Shares owned

22.22K

Exercise price

228.20

Expiration

—

Exercise window

—

Non-qualified Stock Option

Direct

Underlying security

Common Stock

Underlying shares

32.90K

Shares owned

32.90K

Exercise price

127.90

Expiration

—

Exercise window

—

Non-qualified Stock Option

Direct

Underlying security

Common Stock

Underlying shares

14.88K

Shares owned

14.88K

Exercise price

337.74

Expiration

—

Exercise window

—

Non-qualified Stock Option

Direct

Underlying security

Common Stock

Underlying shares

15.07K

Shares owned

15.07K

Exercise price

243.54

Expiration

—

Exercise window

—

Non-qualified Stock Option

Direct

Underlying security

Common Stock

Underlying shares

31.34K

Shares owned

31.34K

Exercise price

86.17

Expiration

—

Exercise window

—

Total

Underlying

164.73K

Owned

164.73K

Security	Underlying	Exercise Price	Exercise Window	Expiration	Underlying Shares	Shares Owned
Non-qualified Stock Option Direct	Common Stock	177.09	—	—	12.74K	12.74K
Non-qualified Stock Option Direct	Common Stock	158.56	—	—	15.31K	15.31K
Phantom Stock Direct	Common Stock		—	—	20.28K	20.28K
Non-qualified Stock Option Direct	Common Stock	228.20	—	—	22.22K	22.22K
Non-qualified Stock Option Direct	Common Stock	127.90	—	—	32.90K	32.90K
Non-qualified Stock Option Direct	Common Stock	337.74	—	—	14.88K	14.88K
Non-qualified Stock Option Direct	Common Stock	243.54	—	—	15.07K	15.07K
Non-qualified Stock Option Direct	Common Stock	86.17	—	—	31.34K	31.34K
Total					164.73K	164.73K