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 %
Treasurer of the State of North Carolina
101
Treasurer of the State of North Carolina
North Carolina
$1.76M 74,368 +6,585 +10%
BMCM
102
Bryn Mawr Capital Management
Pennsylvania
$1.72M 72,728 +10,356 +17%
LSERS
103
Louisiana State Employees Retirement System
Louisiana
$1.66M 70,500 +12,100 +21%
Janus Henderson Group
104
Janus Henderson Group
United Kingdom
$1.64M 69,400 -61,600 -47%
HCM
105
Hahn Capital Management
California
$1.62M 68,748 +3,115 +5%
WAM
106
Wolverine Asset Management
Illinois
$1.61M 68,040 +34,800 +105%
Group One Trading
107
Group One Trading
Illinois
$1.6M 67,908 -36,776 -35%
Natixis Advisors
108
Natixis Advisors
Massachusetts
$1.58M 67,077 +10,219 +18%
Teacher Retirement System of Texas
109
Teacher Retirement System of Texas
Texas
$1.53M 64,845 +675 +1%
XT
110
XTX Topco
Cayman Islands
$1.53M 64,723 +64,723 New
State of Tennessee, Department of Treasury
111
State of Tennessee, Department of Treasury
Tennessee
$1.48M 62,654 -12,914 -17%
VI
112
Versor Investments
New York
$1.46M 62,022 +22,622 +57%
Wellington Management Group
113
Wellington Management Group
Massachusetts
$1.43M 60,778 +60,778 New
CBA
114
Coastal Bridge Advisors
Connecticut
$1.43M 60,413 +1,787 +3%
PFSRSONJ
115
Police & Firemen's Retirement System of New Jersey
New Jersey
$1.43M 60,391 +37,269 +161%
Neuberger Berman Group
116
Neuberger Berman Group
New York
$1.39M 58,800 +42,647 +264%
YCM
117
Yousif Capital Management
Michigan
$1.34M 56,966 +10,526 +23%
William Blair & Company
118
William Blair & Company
Illinois
$1.34M 56,568 +2,368 +4%
MSRPS
119
Maryland State Retirement & Pension System
Maryland
$1.22M 51,806 +2,784 +6%
QCM
120
Quantinno Capital Management
New York
$1.22M 51,543 +10,333 +25%
HCA
121
Hyperion Capital Advisors
New York
$1.22M 51,487 +32,901 +177%
TRSOTSOK
122
Teachers Retirement System of the State of Kentucky
Kentucky
$1.21M 51,336 -4,480 -8%
Ohio Public Employees Retirement System (OPERS)
123
Ohio Public Employees Retirement System (OPERS)
Ohio
$1.21M 51,304 +3,688 +8%
MG
124
Marex Group
$1.18M 50,000 +50,000 New
Barclays
125
Barclays
United Kingdom
$1.16M 49,239 -6,265 -11%
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5
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