GALLAGHER J PATRICK JR (CEO) 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 J PATRICK JR

Filed: 4/1/2026ACC: 0000354190-26-000110

InsiderGALLAGHER J PATRICK JRCIK 1186006

→

IssuerARTHUR J. GALLAGHER & CO.CIK 354190

DirectorOfficer· CEO

Since Mar 2026

-2.37K

Net shares

Net seller

$511.6K

Total sold

Open market trades

0B · 0S

Total transactions

5.35K acquired · 7.71K disposed

Non-Derivative Transactions2

Common Stock

Direct

M · Option Exercise

+5.35K

Price / share

$215.95

Trade value

$1.15M

% of position

4.4%

3/31/2026

120.98K→126.33K

Common Stock

Direct

F · Tax Withholding

−2.37K

Price / share

$215.95

Trade value

$511.59K

% of position

1.9%

3/31/2026

126.33K→123.96K

Total

Net shares

+2.98K

Net value

$642.86K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	3/31/2026	M · Option Exercise	+5.35K	$215.95	$1.15M	4.4%	120.98K	126.33K
Common Stock Direct	3/31/2026	F · Tax Withholding	−2.37K	$215.95	$511.59K	1.9%	126.33K	123.96K
Total			+2.98K		$642.86K

Derivative Transactions1

Phantom Stock

Direct

M · Option Exercise

Converts to

Common Stock

5.35K shares

−5.35K

Strike price

Held after

139.10K

Exercisable

—

3/31/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Phantom Stock Direct	Common Stock5.35K shares	3/31/2026	M · Option Exercise	−5.35K		—	139.10K

Non-Derivative Holdings (Post-Transaction)6

Common Stock

Indirect

Shares owned5.33K

Common Stock

Indirect

Shares owned66.70K

Common Stock

Indirect

Shares owned219.96K

Common Stock

Indirect

Shares owned255.97K

Common Stock

Indirect

Shares owned491.14

Common Stock

Indirect

Shares owned270.18K

Total

818.62K indirect818.62K

Security Title	Shares Owned	Ownership Type
Common Stock	5.33K	Indirect
Common Stock	66.70K	Indirect
Common Stock	219.96K	Indirect
Common Stock	255.97K	Indirect
Common Stock	491.14	Indirect
Common Stock	270.18K	Indirect
Total	818.62K	818.62K indirect

Derivative Holdings (Post-Transaction)8

Non-qualified Stock Option

Direct

Underlying security

Common Stock

Underlying shares

27.21K

Shares owned

27.21K

Exercise price

243.54

Expiration

—

Exercise window

—

Non-qualified Stock Option

Direct

Underlying security

Common Stock

Underlying shares

35.83K

Shares owned

35.83K

Exercise price

158.56

Expiration

—

Exercise window

—

Notional Stock Units

Direct

Underlying security

Common Stock

Underlying shares

153.79K

Shares owned

153.79K

Exercise price

Expiration

—

Exercise window

—

Non-qualified Stock Option

Direct

Underlying security

Common Stock

Underlying shares

68.55K

Shares owned

68.55K

Exercise price

86.17

Expiration

—

Exercise window

—

Non-qualified Stock Option

Direct

Underlying security

Common Stock

Underlying shares

48.45K

Shares owned

48.45K

Exercise price

228.20

Expiration

—

Exercise window

—

Non-qualified Stock Option

Direct

Underlying security

Common Stock

Underlying shares

76.97K

Shares owned

76.97K

Exercise price

127.90

Expiration

—

Exercise window

—

Non-qualified Stock Option

Direct

Underlying security

Common Stock

Underlying shares

30.03K

Shares owned

30.03K

Exercise price

177.09

Expiration

—

Exercise window

—

Non-qualified Stock Option

Direct

Underlying security

Common Stock

Underlying shares

22.73K

Shares owned

22.73K

Exercise price

337.74

Expiration

—

Exercise window

—

Total

Underlying

463.55K

Owned

463.55K

Security	Underlying	Exercise Price	Exercise Window	Expiration	Underlying Shares	Shares Owned
Non-qualified Stock Option Direct	Common Stock	243.54	—	—	27.21K	27.21K
Non-qualified Stock Option Direct	Common Stock	158.56	—	—	35.83K	35.83K
Notional Stock Units Direct	Common Stock	0	—	—	153.79K	153.79K
Non-qualified Stock Option Direct	Common Stock	86.17	—	—	68.55K	68.55K
Non-qualified Stock Option Direct	Common Stock	228.20	—	—	48.45K	48.45K
Non-qualified Stock Option Direct	Common Stock	127.90	—	—	76.97K	76.97K
Non-qualified Stock Option Direct	Common Stock	177.09	—	—	30.03K	30.03K
Non-qualified Stock Option Direct	Common Stock	337.74	—	—	22.73K	22.73K
Total					463.55K	463.55K