ARNETTE STEPHEN A

PrivateCIK: 1919492
Location

CHANTILLY, VA

ARNETTE STEPHEN A (Chief Operating Officer) exercised options at AMENTUM HOLDINGS, INC.

Option exercise — a mechanical event triggered by vesting or expiry. Not a discretionary conviction trade.

M · 1 exercise
InsiderARNETTE STEPHEN ACIK 1919492
IssuerAMENTUM HOLDINGS, INC.CIK 2011286
Officer· Chief Operating Officer
Since Mar 2026
-750.00
Net shares
Net seller
$23.0K
Total sold
0
Open market trades
0B · 0S
3
Total transactions
2.81K acquired · 3.56K disposed
Non-Derivative Transactions2

Common Stock

Direct
M · Option Exercise

Shares

+2.81K

Price / share

Trade value

% of position

3.0%
3/2/2026
94.30K97.11K

Common Stock

Direct
F · Tax Withholding

Shares

750.00

Price / share

$30.70

Trade value

$23.02K

% of position

0.8%
3/2/2026
97.11K96.36K
Total

Net shares

+2.06K

Net value

-$23.02K

Derivative Transactions1

Restricted Stock Units

Direct
M · Option Exercise
Converts to

Common Stock

2.81K shares

Shares

2.81K

Strike price

Held after

0.00

Exercisable

3/2/2026
ARNETTE STEPHEN A — Insider Transaction (Form 4) Filed Mar 4, 2026 | Finecho