William F. Ziebell

CIK: 0001695709

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)1 (5.6%)

Position reduction

Option Exercises (M)8 (44.4%)

Derivative conversions

Awards (A)3 (16.7%)

Compensation grants

Other (G, F, J, C, D, …)6 (33.3%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

AJG

Arthur J. Gallagher & Co.

Officer

Discretionary Trading P&L

Holdings

Transaction History (18 total)

AJG
Arthur J. Gallagher & Co.
Mar 31, 2026
Tax Payment(F)
Direct
51 shares at avg. $215.95$11K
AJG
Arthur J. Gallagher & Co.
Mar 31, 2026
Exercise(M)
Direct
51 shares at avg. $215.95$11K
AJG
Arthur J. Gallagher & Co.
Mar 15, 2026
Exercise(M)
Direct
6.9K shares-
AJG
Arthur J. Gallagher & Co.
Mar 15, 2026
Award(A)
Direct
6.9K shares-
AJG
Arthur J. Gallagher & Co.
Mar 15, 2026
Tax Payment(F)
Direct
2.3K shares at avg. $207.93$483K
AJG
Arthur J. Gallagher & Co.
Mar 15, 2026
Exercise(M)
Direct
6.9K shares-
AJG
Arthur J. Gallagher & Co.
Mar 31, 2025
Exercise(M)
Direct
70 shares-
AJG
Arthur J. Gallagher & Co.
Mar 31, 2025
Tax Payment(F)
Direct
70 shares at avg. $345.24$24K
AJG
Arthur J. Gallagher & Co.
Mar 15, 2025
Exercise(M)
Direct
7K shares-
AJG
Arthur J. Gallagher & Co.
Mar 15, 2025
Award(A)
Direct
7K shares-
AJG
Arthur J. Gallagher & Co.
Mar 15, 2025
Tax Payment(F)
Direct
3K shares at avg. $325.24$984K
AJG
Arthur J. Gallagher & Co.
Mar 15, 2025
Exercise(M)
Direct
7K shares-
AJG
Arthur J. Gallagher & Co.
Mar 10, 2025
Discretionary(I)
Phantom Stock
Direct
1.2K shares at avg. $321.23-
AJG
Arthur J. Gallagher & Co.
Mar 1, 2025
Award(A)
Non-qualified Stock Option
Direct
9.9K shares-
AJG
Arthur J. Gallagher & Co.
Feb 18, 2025
Exercise(M)
Direct
7K shares at avg. $79.59$561K
AJG
Arthur J. Gallagher & Co.
Feb 18, 2025
Sale(S)
Direct
7K shares at avg. $324.41$2.3M
AJG
Arthur J. Gallagher & Co.
Dec 18, 2024
Exercise(M)
Direct
2.9K shares-
AJG
Arthur J. Gallagher & Co.
Dec 18, 2024
Tax Payment(F)
Direct
2.9K shares at avg. $278.49$810K

		Type	Shares	Price		Ownership
Mar 31, 2026	AJG Arthur J. Gallagher & Co.	Tax Payment(F)	51	$215.95	$10,996	Direct
Mar 31, 2026	AJG Arthur J. Gallagher & Co.	Exercise(M)	51	$215.95	$10,996	Direct
Mar 15, 2026	AJG Arthur J. Gallagher & Co.	Exercise(M)	6,930	-	$0	Direct
Mar 15, 2026	AJG Arthur J. Gallagher & Co.	Award(A)	6,930	-	$0	Direct
Mar 15, 2026	AJG Arthur J. Gallagher & Co.	Tax Payment(F)	2,321	$207.93	$482,606	Direct
Mar 15, 2026	AJG Arthur J. Gallagher & Co.	Exercise(M)	6,930	-	$0	Direct
Mar 31, 2025	AJG Arthur J. Gallagher & Co.	Exercise(M)	70	-	-	Direct
Mar 31, 2025	AJG Arthur J. Gallagher & Co.	Tax Payment(F)	70	$345.24	$24,168	Direct
Mar 15, 2025	AJG Arthur J. Gallagher & Co.	Exercise(M)	6,990	-	-	Direct
Mar 15, 2025	AJG Arthur J. Gallagher & Co.	Award(A)	6,990	-	-	Direct
Mar 15, 2025	AJG Arthur J. Gallagher & Co.	Tax Payment(F)	3,026	$325.24	$984,176	Direct
Mar 15, 2025	AJG Arthur J. Gallagher & Co.	Exercise(M)	6,990	-	-	Direct
Mar 10, 2025	AJG Arthur J. Gallagher & Co.	Discretionary(I) Phantom Stock	1,245	$321.23	-	Direct
Mar 1, 2025	AJG Arthur J. Gallagher & Co.	Award(A) Non-qualified Stock Option	9,917	-	-	Direct
Feb 18, 2025	AJG Arthur J. Gallagher & Co.	Exercise(M)	7,049	$79.59	$561,030	Direct
Feb 18, 2025	AJG Arthur J. Gallagher & Co.	Sale(S)	7,049	$324.41	$2,286,767	Direct
Dec 18, 2024	AJG Arthur J. Gallagher & Co.	Exercise(M)	2,907	-	$0	Direct
Dec 18, 2024	AJG Arthur J. Gallagher & Co.	Tax Payment(F)	2,907	$278.49	$809,685	Direct

1-18 of 18 transactions

About Ziebell William F

Ziebell William F (SEC CIK 0001695709) files insider reports with the SEC as VICE PRESIDENT of Arthur J. Gallagher & Co. (AJG).

Signal8 holds 8 ownership filings by Ziebell William F, all Form 4s, filed between Dec 20, 2024 and Apr 2, 2026. Those filings report 18 transactions, from Dec 18, 2024 to Mar 31, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Ziebell William F's filings is in ROLLING MEADOWS, IL.

Recent filings by Ziebell William F

Mar 31, 2026: Tax withholding of AJG shares (Form 4, code F).
Mar 31, 2026: Option exercise of AJG shares (Form 4, code M).
Mar 15, 2026: Option exercise of AJG shares (Form 4, code M).
Mar 15, 2026: Grant or award of AJG shares (Form 4, code A).
Mar 15, 2026: Tax withholding of AJG shares (Form 4, code F).

Other insiders filing for Arthur J. Gallagher & Co. (AJG)

Koreyva Kyle Graham, Chief Accounting Officer
CARY RICHARD C, Controller, CAO
Gallagher Patrick Murphy, Chief Operating Officer
GALLAGHER J PATRICK JR, CEO
Hudson Scott R, Vice President
Miskel Christopher C., Director

How to read Form 4 transaction codes