Amentum Holdings, Inc. (AMTM) Insider Ownership

Historic Insider Ownership Trends

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares (Direct) Shares (Indirect) Report Date
Goldberg Employee Co-Inv. Iv L.P. Lindsay 0 45,026,743 12 May, 2025
Alan E Goldberg 0 45,026,743 12 May, 2025
2014 Llc Goldberg 0 45,026,743 12 May, 2025
Steven J. Demetriou Executive Chair 820,476 0 19 Nov, 2025
John C. Vollmer 429,842 0 10 Feb, 2026
John E. Heller Chief Executive Officer 366,058 0 29 Jan, 2026
Jill L Bruning Chief Technology Officer 190,999 0 05 Mar, 2026
Travis Barton Johnson Chief Financial Officer 108,675 0 19 Nov, 2025
Stephen A Arnette Chief Operating Officer 96,357 0 04 Mar, 2026
Ralph E Eberhart 48,120 0 10 Feb, 2026
Vincent K Brooks 27,462 0 10 Feb, 2026
Mary Michele T St. Chief Legal Officer Gc 27,043 0 18 Feb, 2026
Sean Thomas Mullen Chief Growth Officer 26,138 0 19 Dec, 2025
Darren Burton Chief People Officer 23,600 0 09 Dec, 2025
Sandra E. Rowland 20,073 0 10 Feb, 2026
Barbara Loughran 9,662 0 10 Feb, 2026
Susan Leslie Ireland 8,509 0 10 Feb, 2026
Christopher M.T. Thompson 5,062 0 10 Feb, 2026

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
04 Mar, 2026 Jill L Bruning Common Stock D 30,000 $0.00 190,999 D G
02 Mar, 2026 Stephen A Arnette Common Stock A 2,808 - 97,107 D M
02 Mar, 2026 Stephen A Arnette Common Stock D 750 $30.70 96,357 D F
02 Mar, 2026 Stephen A Arnette Restricted Stock Units D 2,808 $0.00 0 D M
17 Feb, 2026 Mary Michele T St. Common Stock A 7,080 - 29,351 D M
17 Feb, 2026 Mary Michele T St. Common Stock D 2,308 $30.05 27,043 D F
17 Feb, 2026 Mary Michele T St. Restricted Stock Units D 7,080 $0.00 14,162 D M
06 Feb, 2026 Vincent K Brooks Common Stock A 11,564 - 22,400 D M
06 Feb, 2026 Christopher M.T. Thompson Common Stock A 5,062 $0.00 5,062 D A
06 Feb, 2026 Barbara Loughran Common Stock A 5,062 $0.00 9,662 D A
06 Feb, 2026 Susan Leslie Ireland Common Stock A 5,062 $0.00 8,509 D A
06 Feb, 2026 Ralph E Eberhart Common Stock A 11,564 - 43,058 D M
06 Feb, 2026 Sandra E. Rowland Common Stock A 11,564 - 15,011 D M
06 Feb, 2026 John C. Vollmer Common Stock A 11,564 - 424,780 D M
06 Feb, 2026 Sandra E. Rowland Common Stock A 5,062 $0.00 20,073 D A
06 Feb, 2026 Vincent K Brooks Common Stock A 5,062 $0.00 27,462 D A
06 Feb, 2026 John C. Vollmer Common Stock A 5,062 $0.00 429,842 D A
06 Feb, 2026 Ralph E Eberhart Common Stock A 5,062 $0.00 48,120 D A
06 Feb, 2026 John C. Vollmer Restricted Stock Units D 11,564 $0.00 0 D M
06 Feb, 2026 Ralph E Eberhart Restricted Stock Units D 11,564 $0.00 0 D M