John C. Vollmer

CIK: 0001723342

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)0 (0.0%)

Position reduction

Option Exercises (M)2 (33.3%)

Derivative conversions

Awards (A)3 (50.0%)

Compensation grants

Other (G, F, J, C, D, …)1 (16.7%)

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

Companies & Roles (1)

AMTM

Amentum Holdings, Inc.

Director

Discretionary Trading P&L

Holdings

Transaction History (6 total)

AMTM
Amentum Holdings, Inc.
Feb 6, 2026
Exercise(M)
Direct
11.6K shares-
AMTM
Amentum Holdings, Inc.
Feb 6, 2026
Award(A)
Direct
5.1K shares-
AMTM
Amentum Holdings, Inc.
Apr 8, 2025
Award(A)
Restricted Stock Units
Direct
11.6K shares-
AMTM
Amentum Holdings, Inc.
Mar 5, 2025
Exercise(M)
Direct
3.4K shares-
AMTM
Amentum Holdings, Inc.
Dec 17, 2024
Other(J)
Direct
391.3K shares-
AMTM
Amentum Holdings, Inc.
Nov 6, 2024
Award(A)
Restricted Stock Units
Direct
3.4K shares-

		Type	Shares	Price		Ownership
Feb 6, 2026	AMTM Amentum Holdings, Inc.	Exercise(M)	11,564	-	$0	Direct
Feb 6, 2026	AMTM Amentum Holdings, Inc.	Award(A)	5,062	-	$0	Direct
Apr 8, 2025	AMTM Amentum Holdings, Inc.	Award(A) Restricted Stock Units	11,564	-	-	Direct
Mar 5, 2025	AMTM Amentum Holdings, Inc.	Exercise(M)	3,447	-	-	Direct
Dec 17, 2024	AMTM Amentum Holdings, Inc.	Other(J)	391,341	-	-	Direct
Nov 6, 2024	AMTM Amentum Holdings, Inc.	Award(A) Restricted Stock Units	3,447	-	-	Direct

1-6 of 6 transactions

About Vollmer John C.

Vollmer John C. (SEC CIK 0001723342) files insider reports with the SEC as Director of Amentum Holdings, Inc. (AMTM).

Signal8 holds 5 ownership filings by Vollmer John C. (1 Form 3, 4 Form 4), filed between Sep 27, 2024 and Feb 10, 2026. Those filings report 6 transactions, from Nov 6, 2024 to Feb 6, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Vollmer John C.'s filings is in CHANTILLY, VA.

Recent filings by Vollmer John C.

Feb 6, 2026: Option exercise of AMTM shares (Form 4, code M).
Feb 6, 2026: Grant or award of AMTM shares (Form 4, code A).
Apr 8, 2025: Grant or award of AMTM derivative securities (Form 4, code A).
Mar 5, 2025: Option exercise of AMTM shares (Form 4, code M).
Dec 17, 2024: Other transaction of AMTM shares (Form 4, code J).

Other insiders filing for Amentum Holdings, Inc. (AMTM)

Thompson Christopher M.T., Director
Heller John E., Chief Executive Officer
Mullen Sean Thomas, Chief Growth Officer
Johnson Travis Barton, Chief Financial Officer
Bruning Jill L, Chief Technology Officer
Arnette Stephen A, Chief Operating Officer

How to read Form 4 transaction codes