HOWELL DOUGLAS K (VP & Chief Financial Officer) received a stock award from ARTHUR J. GALLAGHER & CO.

Compensation award — not an open‑market transaction. Less informative as a directional signal.

A · 1 award

HOWELL DOUGLAS K

Filed: 3/17/2026ACC: 0000354190-26-000087

InsiderHOWELL DOUGLAS KCIK 1222374

→

IssuerARTHUR J. GALLAGHER & CO.CIK 354190

Officer· VP & Chief Financial Officer

Since Mar 2026

-3.42K

Net shares

Net seller

$2.60M

Total sold

Open market trades

0B · 0S

Total transactions

32.26K acquired · 35.69K disposed

Non-Derivative Transactions6

Common Stock

Direct

M · Option Exercise

+14.10K

Price / share

$79.59

Trade value

$1.12M

% of position

14.7%

3/13/2026

96.03K→110.13K

Common Stock

Direct

F · Tax Withholding

−8.64K

Price / share

$207.93

Trade value

$1.80M

% of position

7.8%

3/13/2026

110.13K→101.49K

Common Stock (restricted)

Direct

A · Award

+9.08K

Price / share

—

Trade value

—

% of position

New position

3/15/2026

0.00→9.08K

Common Stock (restricted)

Direct

M · Option Exercise

−9.08K

Price / share

—

Trade value

—

% of position

New position

3/15/2026

9.08K→0.00

Common Stock

Direct

M · Option Exercise

+9.08K

Price / share

—

Trade value

—

% of position

8.9%

3/15/2026

101.49K→110.57K

Common Stock

Direct

F · Tax Withholding

−3.87K

Price / share

$207.93

Trade value

$803.65K

% of position

3.5%

3/15/2026

110.57K→106.71K

Total

Net shares

+10.68K

Net value

-$1.48M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	3/13/2026	M · Option Exercise	+14.10K	$79.59	$1.12M	14.7%	96.03K	110.13K
Common Stock Direct	3/13/2026	F · Tax Withholding	−8.64K	$207.93	$1.80M	7.8%	110.13K	101.49K
Common Stock (restricted) Direct	3/15/2026	A · Award	+9.08K	—	—	New position	0.00	9.08K
Common Stock (restricted) Direct	3/15/2026	M · Option Exercise	−9.08K	—	—	New position	9.08K	0.00
Common Stock Direct	3/15/2026	M · Option Exercise	+9.08K	—	—	8.9%	101.49K	110.57K
Common Stock Direct	3/15/2026	F · Tax Withholding	−3.87K	$207.93	$803.65K	3.5%	110.57K	106.71K
Total			+10.68K		-$1.48M

Derivative Transactions1

Non-qualified Stock Option

Direct

M · Option Exercise

Converts to

Common Stock

14.10K shares

−14.10K

Strike price

79.59

Held after

0.00

Exercisable

—

3/13/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Non-qualified Stock Option Direct	Common Stock14.10K shares	3/13/2026	M · Option Exercise	−14.10K	79.59	—	0.00

Non-Derivative Holdings (Post-Transaction)2

Common Stock

Indirect

Shares owned3.17K

Common Stock

Indirect

Shares owned491.13

Total

3.66K indirect3.66K

Security Title	Shares Owned	Ownership Type
Common Stock	3.17K	Indirect
Common Stock	491.13	Indirect
Total	3.66K	3.66K indirect

Derivative Holdings (Post-Transaction)10

Notional Stock Units

Direct

Underlying security

Common Stock

Underlying shares

208.34K

Shares owned

208.34K

Exercise price

Expiration

—

Exercise window

—

Notional Stock Units

Direct

Underlying security

Common Stock

Underlying shares

192.20K

Shares owned

192.20K

Exercise price

Expiration

—

Exercise window

—

Non-qualified Stock Option

Direct

Underlying security

Common Stock

Underlying shares

31.27K

Shares owned

31.27K

Exercise price

127.90

Expiration

—

Exercise window

—

Non-qualified Stock Option

Direct

Underlying security

Common Stock

Underlying shares

12.11K

Shares owned

12.11K

Exercise price

177.09

Expiration

—

Exercise window

—

Non-qualified Stock Option

Direct

Underlying security

Common Stock

Underlying shares

20.74K

Shares owned

20.74K

Exercise price

228.20

Expiration

—

Exercise window

—

Non-qualified Stock Option

Direct

Underlying security

Common Stock

Underlying shares

14.54K

Shares owned

14.54K

Exercise price

158.56

Expiration

—

Exercise window

—

Non-qualified Stock Option

Direct

Underlying security

Common Stock

Underlying shares

17.13K

Shares owned

17.13K

Exercise price

86.17

Expiration

—

Exercise window

—

Non-qualified Stock Option

Direct

Underlying security

Common Stock

Underlying shares

12.73K

Shares owned

12.73K

Exercise price

243.54

Expiration

—

Exercise window

—

Non-qualified Stock Option

Direct

Underlying security

Common Stock

Underlying shares

13.88K

Shares owned

13.88K

Exercise price

337.74

Expiration

—

Exercise window

—

Phantom Stock

Direct

Underlying security

Common Stock

Underlying shares

6.93K

Shares owned

6.93K

Exercise price

Expiration

—

Exercise window

—

Total

Underlying

529.87K

Owned

529.87K

Security	Underlying	Exercise Price	Exercise Window	Expiration	Underlying Shares	Shares Owned
Notional Stock Units Direct	Common Stock	0	—	—	208.34K	208.34K
Notional Stock Units Direct	Common Stock	0	—	—	192.20K	192.20K
Non-qualified Stock Option Direct	Common Stock	127.90	—	—	31.27K	31.27K
Non-qualified Stock Option Direct	Common Stock	177.09	—	—	12.11K	12.11K
Non-qualified Stock Option Direct	Common Stock	228.20	—	—	20.74K	20.74K
Non-qualified Stock Option Direct	Common Stock	158.56	—	—	14.54K	14.54K
Non-qualified Stock Option Direct	Common Stock	86.17	—	—	17.13K	17.13K
Non-qualified Stock Option Direct	Common Stock	243.54	—	—	12.73K	12.73K
Non-qualified Stock Option Direct	Common Stock	337.74	—	—	13.88K	13.88K
Phantom Stock Direct	Common Stock		—	—	6.93K	6.93K
Total					529.87K	529.87K