ZIEBELL WILLIAM F (VICE PRESIDENT) 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

ZIEBELL WILLIAM F

Filed: 3/18/2026ACC: 0000354190-26-000097

InsiderZIEBELL WILLIAM FCIK 1695709

→

IssuerARTHUR J. GALLAGHER & CO.CIK 354190

Officer· VICE PRESIDENT

Since Sep 2018

+4.61K

Net shares

Net buyer

$482.6K

Total sold

Open market trades

0B · 0S

Total transactions

13.86K acquired · 9.25K disposed

Non-Derivative Transactions4

Common Stock (restricted)

Direct

A · Award

+6.93K

Price / share

—

Trade value

—

% of position

New position

3/15/2026

0.00→6.93K

Common Stock (restricted)

Direct

M · Option Exercise

−6.93K

Price / share

—

Trade value

—

% of position

New position

3/15/2026

6.93K→0.00

Common Stock

Direct

M · Option Exercise

+6.93K

Price / share

—

Trade value

—

% of position

15.7%

3/15/2026

44.08K→51.01K

Common Stock

Direct

F · Tax Withholding

−2.32K

Price / share

$207.93

Trade value

$482.61K

% of position

4.6%

3/15/2026

51.01K→48.68K

Total

Net shares

+4.61K

Net value

-$482.61K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock (restricted) Direct	3/15/2026	A · Award	+6.93K	—	—	New position	0.00	6.93K
Common Stock (restricted) Direct	3/15/2026	M · Option Exercise	−6.93K	—	—	New position	6.93K	0.00
Common Stock Direct	3/15/2026	M · Option Exercise	+6.93K	—	—	15.7%	44.08K	51.01K
Common Stock Direct	3/15/2026	F · Tax Withholding	−2.32K	$207.93	$482.61K	4.6%	51.01K	48.68K
Total			+4.61K		-$482.61K

Derivative Transactions0

No derivative transactions reported

Non-Derivative Holdings (Post-Transaction)1

Common Stock

Indirect

Shares owned491.14

Total

491.14 indirect491.14

Security Title	Shares Owned	Ownership Type
Common Stock	491.14	Indirect
Total	491.14	491.14 indirect

Derivative Holdings (Post-Transaction)8

Non-qualified Stock Option

Direct

Underlying security

Common Stock

Underlying shares

9.92K

Shares owned

9.92K

Exercise price

337.74

Expiration

—

Exercise window

—

Non-qualified Stock Option

Direct

Underlying security

Common Stock

Underlying shares

23.51K

Shares owned

23.51K

Exercise price

86.17

Expiration

—

Exercise window

—

Non-qualified Stock Option

Direct

Underlying security

Common Stock

Underlying shares

9.24K

Shares owned

9.24K

Exercise price

177.09

Expiration

—

Exercise window

—

Non-qualified Stock Option

Direct

Underlying security

Common Stock

Underlying shares

22.21K

Shares owned

22.21K

Exercise price

127.90

Expiration

—

Exercise window

—

Phantom Stock

Direct

Underlying security

Common Stock

Underlying shares

68.21K

Shares owned

68.21K

Exercise price

Expiration

—

Exercise window

—

Notional Stock Units

Direct

Underlying security

Common Stock

Underlying shares

6.03K

Shares owned

6.03K

Exercise price

Expiration

—

Exercise window

—

Non-qualified Stock Option

Direct

Underlying security

Common Stock

Underlying shares

11.10K

Shares owned

11.10K

Exercise price

158.56

Expiration

—

Exercise window

—

Non-qualified Stock Option

Direct

Underlying security

Common Stock

Underlying shares

9.71K

Shares owned

9.71K

Exercise price

243.54

Expiration

—

Exercise window

—

Total

Underlying

159.94K

Owned

159.94K

Security	Underlying	Exercise Price	Exercise Window	Expiration	Underlying Shares	Shares Owned
Non-qualified Stock Option Direct	Common Stock	337.74	—	—	9.92K	9.92K
Non-qualified Stock Option Direct	Common Stock	86.17	—	—	23.51K	23.51K
Non-qualified Stock Option Direct	Common Stock	177.09	—	—	9.24K	9.24K
Non-qualified Stock Option Direct	Common Stock	127.90	—	—	22.21K	22.21K
Phantom Stock Direct	Common Stock		—	—	68.21K	68.21K
Notional Stock Units Direct	Common Stock		—	—	6.03K	6.03K
Non-qualified Stock Option Direct	Common Stock	158.56	—	—	11.10K	11.10K
Non-qualified Stock Option Direct	Common Stock	243.54	—	—	9.71K	9.71K
Total					159.94K	159.94K