QUODD

Insider Transactions last 24 months for Amentum Holdings, Inc. - NYSE: AMTM

Transactions
All	Buy	Sell	Option Exercise

Filer's Name	Relationship/ Title	Trans. Date	Trans. Type	Ownership Type	Security Type	Shares	Price	Trans. Value	Total Shares Owned
Bruning Jill L	Chief Technology Officer	03/04/2026	DG	Direct	COM	30,000	$0.00	$0.00	190,999
Arnette Stephen A	Chief Operating Officer	03/02/2026	DF	Direct	COM	750	$30.70	$23,025.00	96,357
Arnette Stephen A	Chief Operating Officer	03/02/2026	AM	Direct	COM	2,808	$0.00	$0.00	97,107
St. Mary Michele T	Chief Legal Officer & GC	02/17/2026	DF	Direct	COM	2,308	$30.05	$69,355.40	27,043
St. Mary Michele T	Chief Legal Officer & GC	02/17/2026	AM	Direct	COM	7,080	$0.00	$0.00	29,351
Vollmer John C.	Director	02/06/2026	AA	Direct	COM	5,062	$0.00	$0.00	429,842
Vollmer John C.	Director	02/06/2026	AM	Direct	COM	11,564	$0.00	$0.00	424,780
Thompson Christopher M.T.	Director	02/06/2026	AA	Direct	COM	5,062	$0.00	$0.00	5,062
Loughran Barbara	Director	02/06/2026	AA	Direct	COM	5,062	$0.00	$0.00	9,662
Eberhart Ralph E	Director	02/06/2026	AA	Direct	COM	5,062	$0.00	$0.00	48,120
Eberhart Ralph E	Director	02/06/2026	AM	Direct	COM	11,564	$0.00	$0.00	43,058
Brooks Vincent K	Director	02/06/2026	AA	Direct	COM	5,062	$0.00	$0.00	27,462
Brooks Vincent K	Director	02/06/2026	AM	Direct	COM	11,564	$0.00	$0.00	22,400
Rowland Sandra E.	Director	02/06/2026	AA	Direct	COM	5,062	$0.00	$0.00	20,073
Rowland Sandra E.	Director	02/06/2026	AM	Direct	COM	11,564	$0.00	$0.00	15,011
Ireland Susan Leslie	Director	02/06/2026	AA	Direct	COM	5,062	$0.00	$0.00	8,509
Heller John E.	Chief Executive Officer	01/28/2026	DF	Direct	COM	19,768	$35.71	$705,915.28	366,058
Heller John E.	Chief Executive Officer	01/28/2026	AM	Direct	COM	51,979	$0.00	$0.00	385,826
Mullen Sean Thomas	Chief Growth Officer	12/17/2025	DF	Direct	COM	4,194	$28.67	$120,241.98	26,138
Mullen Sean Thomas	Chief Growth Officer	12/17/2025	AM	Direct	COM	9,298	$0.00	$0.00	30,332
Burton Darren	Chief People Officer	12/05/2025	DF	Direct	COM	1,392	$28.88	$40,200.96	23,600
Burton Darren	Chief People Officer	12/05/2025	AM	Direct	COM	2,721	$0.00	$0.00	24,992
Demetriou Steven J.	Executive Chair	11/17/2025	AA	Direct	COM	111,355	$0.00	$0.00	820,476
Demetriou Steven J.	Executive Chair	11/17/2025	DF	Direct	COM	17,077	$21.49	$366,984.73	709,121
Demetriou Steven J.	Executive Chair	11/17/2025	AM	Direct	COM	43,396	$0.00	$0.00	726,198

1 2 3 4 Next Last You are at page 1 of 4 pages

Transaction Type Key First letter: A = Acquired, D = Disposed Second letter: A = Grant, award or other acquisition pursuant to Rule 16b-3(d) C = Conversion of derivative security \| D = Disposition to the issuer of issuer equity securities pursuant to Rule 16b-3(e) \| E = Expiration of short derivative position \| F = Payment of exercise price or tax liability by delivering or withholding securities incident to the receipt, exercise or vesting of a security issued in accordance with Rule 16b-3. \| G = Gift \| H = Expiration (or cancellation) of long derivative position with value received \| I = Discretionary transaction in accordance with Rule 16b-3(f) \| J = Other \| L = Small acquisition under Rule 16a-6 \| M = Exercise or conversion of derivative security exempted pursuant to Rule 16b-3 \| O = Exercise of out-of-the-money derivative security \| P = Open market or private purchase \| S = Open market or private sale \| U = Disposition pursuant to a tender of shares in a change of control transaction \| W = Acquisition or disposition by will or the laws of descent and distribution \| X = Exercise of in-the-money or at-the-money derivative security \| Z = Deposit into or withdrawal from voting trust		Send to Excel

Transaction Type Key
First letter: A = Acquired, D = Disposed
Second letter:
A = Grant, award or other acquisition pursuant to Rule 16b-3(d) C = Conversion of derivative security | D = Disposition to the issuer of issuer equity securities pursuant to Rule 16b-3(e) | E = Expiration of short derivative position | F = Payment of exercise price or tax liability by delivering or withholding securities incident to the receipt, exercise or vesting of a security issued in accordance with Rule 16b-3. | G = Gift | H = Expiration (or cancellation) of long derivative position with value received | I = Discretionary transaction in accordance with Rule 16b-3(f) | J = Other | L = Small acquisition under Rule 16a-6 | M = Exercise or conversion of derivative security exempted pursuant to Rule 16b-3 | O = Exercise of out-of-the-money derivative security | P = Open market or private purchase | S = Open market or private sale | U = Disposition pursuant to a tender of shares in a change of control transaction | W = Acquisition or disposition by will or the laws of descent and distribution | X = Exercise of in-the-money or at-the-money derivative security | Z = Deposit into or withdrawal from voting trust

Send to Excel