ST. MARY MICHELE T

PrivateCIK: 2057553
Location

CHANTILLY, VA

ST. MARY MICHELE T (Chief Legal Officer & GC) exercised options at AMENTUM HOLDINGS, INC.

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

M · 1 exercise
InsiderST. MARY MICHELE TCIK 2057553
IssuerAMENTUM HOLDINGS, INC.CIK 2011286
Officer· Chief Legal Officer & GC
Since Feb 2026
-2.31K
Net shares
Net seller
$69.4K
Total sold
0
Open market trades
0B · 0S
3
Total transactions
7.08K acquired · 9.39K disposed
Non-Derivative Transactions2

Common Stock

Direct
M · Option Exercise

Shares

+7.08K

Price / share

Trade value

% of position

31.8%
2/17/2026
22.27K29.35K

Common Stock

Direct
F · Tax Withholding

Shares

2.31K

Price / share

$30.05

Trade value

$69.36K

% of position

7.9%
2/17/2026
29.35K27.04K
Total

Net shares

+4.77K

Net value

-$69.36K

Derivative Transactions1

Restricted Stock Units

Direct
M · Option Exercise
Converts to

Common Stock

7.08K shares

Shares

7.08K

Strike price

Held after

14.16K

Exercisable

2/17/2026
ST. MARY MICHELE T — Insider Transaction (Form 4) Filed Feb 18, 2026 | Finecho