Ziebell William F 4

4 · Arthur J. Gallagher & Co. · Filed Mar 18, 2026

AI-generated summary of this filing

Updated Mar 19, 2026

AJG VP William Ziebell Receives Award & Exercises Options

What Happened

William F. Ziebell, Vice President at Arthur J. Gallagher & Co. (AJG), had performance/phantom awards vest on March 15, 2026 and reported the conversion/exercise of those derivative units into common stock. The filing shows 6,930 shares acquired as an award (A) and related exercise/conversion entries (M). To satisfy tax withholding, 2,321 shares were disposed at $207.93 per share, totaling approximately $482,606 (F).
This was primarily an award/vesting event (not a buy for market exposure). The disposal of 2,321 shares reflects withholding to cover taxes owed on the vested award, effectively a cashless/net settlement of part of the award.

Key Details

Transaction date: March 15, 2026 (Form filed March 18, 2026; filing was one day late — footnote F1).
Primary amounts: 6,930 shares acquired via award/conversion; 2,321 shares disposed for tax withholding at $207.93 each = ~$482,606.
Transaction codes: A = award/grant (vesting of PSUs/phantom stock), M = exercise/conversion of derivative, F = shares withheld to pay tax liability.
Shares owned following the transactions: Not provided in the supplied excerpt of the filing.
Relevant footnotes: F2 (PSUs awarded 3/15/2023 vested 3/15/2026); F3/F9 (phantom/notional units represent rights to one share each); F4 (Age 62 deferred compensation elections referenced); F10 (some notional units payable upon separation).
Filing timeliness: Marked late (filed one day after the report date) per F1.

Context

This was mainly a vesting/conversion of performance/phantom units into common stock. The withholding of 2,321 shares to cover taxes is a routine, non-market-sale settlement (a cashless/net withholding), not a discretionary open-market sale.
For retail investors: vesting/employment-related conversions are common and do not necessarily signal buying or selling intent; the only shares leaving Ziebell’s holdings in this event were withheld to cover taxes.

Form 4

Period: 2026-03-15

VICE PRESIDENT

Transactions

Holdings

Common Stock
(indirect: By 401(k))
491.139
Phantom Stock
[F3][F4]
→ Common Stock (68,213.391 underlying)
68,213.391
Non-qualified Stock Option
[F5]
Exercise: $86.17Exp: 2027-03-12→ Common Stock (23,510 underlying)
23,510
Non-qualified Stock Option
[F5]
Exercise: $127.90Exp: 2028-03-16→ Common Stock (22,210 underlying)
22,210
Non-qualified Stock Option
[F5]
Exercise: $158.56Exp: 2029-03-15→ Common Stock (11,100 underlying)
11,100
Non-qualified Stock Option
[F6][F5]
Exercise: $337.74Exp: 2032-03-01→ Common Stock (9,917 underlying)
9,917
Non-qualified Stock Option
[F7]
Exercise: $243.54Exp: 2031-03-01→ Common Stock (9,712 underlying)
9,712
Non-qualified Stock Option
[F8]
Exercise: $177.09Exp: 2030-03-15→ Common Stock (9,240 underlying)
9,240
Notional Stock Units
[F9][F10]
→ Common Stock (6,033.755 underlying)
6,033.755

Footnotes (10)

[F1]Filed one day late due to a technical filing issue.
[F10]The notional stock units become payable following the reporting person's separation from service with Gallagher.
[F2]Performance share units (awarded on March 15, 2023) earned and vested as of March 15, 2026.
[F3]Each share of phantom stock represents a right to receive one share of Gallagher common stock.
[F4]These shares represent awards under the Age 62 Plan, a nonqualified deferred compensation plan of the Company, which have been deemed invested in Company common stock at the election of the reporting person. Participants vest in these awards when they attain age 62, or after a one-year period for participants who have attained age 61.
[F5]One-third of this stock option becomes exerciseable on each of the 3rd, 4th, and 5th anniversaries of the grant date.
[F6]Closing price of Gallagher common stock on February 28, 2025.
[F7]One-third of this stock option becomes exercisable on each of the 3rd, 4th, and 5th anniversaries of the grant date.
[F8]One-third of this stock option becomes exercisable on each of the 3rd, 4th, and 5th anniversaries of the grant date.
[F9]Each notional stock unit represents a right to receive one share of Gallagher common stock.

Signature

/s/ Monica Norzagaray, by power of attorney|2026-03-18

2 files