AMTM

Amentum Holdings, Inc.
AMTM

Overview Fund Activity

451 hedge funds and large institutions have $4.73B invested in Amentum Holdings, Inc. in 2025 Q2 according to their latest regulatory filings, with 112 funds opening new positions, 227 increasing their positions, 97 reducing their positions, and 65 closing their positions.

Holders
451
Holders Change
+38
Holders Change %
+9.2%
% of All Funds
6.06%
Holding in Top 10
9
Holding in Top 10 Change
+4
Holding in Top 10 Change %
+80%
% of All Funds
0.12%
New
112
Increased
227
Reduced
97
Closed
65
Calls
$44.4M
Puts
$22.2M
Net Calls
+$22.2M
Net Calls Change
+$1.62M

Top Buyers

1
Millennium Management
1
Millennium Management
New York
$110M
2
Invesco
2
Invesco
Georgia
$462M
3
Norges Bank
3
Norges Bank
Norway
$51M
4
Primecap Management
4
Primecap Management
California
$284M
5
FCM
5
Frontier Capital Management
Massachusetts
$129M

Top Sellers

1
Citadel Advisors
1
Citadel Advisors
Florida
$8.1M
2
Balyasny Asset Management
2
Balyasny Asset Management
Illinois
$0
3
CCPM
3
Cooper Creek Partners Management
New York
$0
4
VC
4
Voss Capital
Texas
$33.1M
5
UBS Group
5
UBS Group
Switzerland
$18.1M
Name Market Value Shares Shares
Change 		Shares
Change %
Jane Street
451
Jane Street
New York
– – -601,760 Closed
DKCM
452
Davidson Kempner Capital Management
New York
– – -450,000 Closed
MIM
453
Monashee Investment Management
Massachusetts
– – -360,000 Closed
CP
454
Castalian Partners
Minnesota
– – -304,500 Closed
TC
455
TwinBeech Capital
New York
– – -225,438 Closed
ECM
456
Eisler Capital Management
United Kingdom
– – -126,889 Closed
SGM
457
Seven Grand Managers
New York
– – -100,000 Closed
Walleye Trading
458
Walleye Trading
New York
– – -68,470 Closed
CM
459
Caption Management
Oklahoma
– – -68,400 Closed
CC
460
Centiva Capital
New York
– – -65,258 Closed
WHCM
461
Wolf Hill Capital Management
Connecticut
– – -63,857 Closed
WAM
462
Weiss Asset Management
Massachusetts
– – -60,953 Closed
EGM
463
Engineers Gate Manager
New York
– – -53,830 Closed
Simplex Trading
464
Simplex Trading
Illinois
– – -52,827 Closed
FCH
465
Freestone Capital Holdings
Washington
– – -40,027 Closed
Allianz Asset Management
466
Allianz Asset Management
Germany
– – -38,700 Closed
SB
467
SIG Brokerage
New York
– – -35,052 Closed
Wolverine Trading
468
Wolverine Trading
Illinois
– – -32,816 Closed
ADEF
469
ABS Direct Equity Fund
Connecticut
– – -32,500 Closed
Renaissance Technologies
470
Renaissance Technologies
New York
– – -31,400 Closed
GCP
471
GSA Capital Partners
United Kingdom
– – -30,488 Closed
QT
472
Quantbot Technologies
New York
– – -28,362 Closed
CC
473
Carlson Capital
Texas
– – -28,000 Closed
Two Sigma Advisers
474
Two Sigma Advisers
New York
– – -25,500 Closed
A
475
AlphaQuest
New York
– – -23,780 Closed
17 18
19
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