AMTM

Amentum Holdings, Inc.
AMTM

Overview Fund Activity

453 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, 99 reducing their positions, and 65 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
453
Holders Change
+40
Holders Change %
+9.69%
% of All Funds
6.08%
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
99
Closed
65
Calls
$56.6M
Puts
$31.3M
Net Calls
+$25.2M
Net Calls Change
+$4.65M

Top Buyers

1
Millennium Management
Millennium Management
New York
$110M
2
Invesco
Invesco
Georgia
$462M
3
Primecap Management
Primecap Management
California
$284M
4
FCM
Frontier Capital Management
Massachusetts
$129M
5
Mirae Asset Global ETFs Holdings
Mirae Asset Global ETFs Holdings
Hong Kong
$32.6M

Top Sellers

1
Citadel Advisors
Citadel Advisors
Florida
$8.1M
2
Balyasny Asset Management
Balyasny Asset Management
Illinois
$0
3
CCPM
Cooper Creek Partners Management
New York
$0
4
VC
Voss Capital
Texas
$33.1M
5
UBS Group
UBS Group
Switzerland
$18.1M
Name Holding Trade Value Shares
Change 		Shares
Change %
Treasurer of the State of North Carolina
101
Treasurer of the State of North Carolina
North Carolina
$1.76M +$155K +6,585 +10%
BMCM
102
Bryn Mawr Capital Management
Pennsylvania
$1.72M +$245K +10,356 +17%
LSERS
103
Louisiana State Employees Retirement System
Louisiana
$1.66M +$286K +12,100 +21%
Janus Henderson Group
104
Janus Henderson Group
United Kingdom
$1.64M -$1.45M -61,600 -47%
HCM
105
Hahn Capital Management
California
$1.62M +$73.5K +3,115 +5%
WAM
106
Wolverine Asset Management
Illinois
$1.61M +$822K +34,800 +105%
Group One Trading
107
Group One Trading
Illinois
$1.6M -$868K -36,776 -35%
Natixis Advisors
108
Natixis Advisors
Massachusetts
$1.58M +$241K +10,219 +18%
Teacher Retirement System of Texas
109
Teacher Retirement System of Texas
Texas
$1.53M +$15.9K +675 +1%
XT
110
XTX Topco
Cayman Islands
$1.53M +$1.53M +64,723 New
State of Tennessee, Department of Treasury
111
State of Tennessee, Department of Treasury
Tennessee
$1.48M -$305K -12,914 -17%
VI
112
Versor Investments
New York
$1.46M +$534K +22,622 +57%
Wellington Management Group
113
Wellington Management Group
Massachusetts
$1.43M +$1.43M +60,778 New
CBA
114
Coastal Bridge Advisors
Connecticut
$1.43M +$42.2K +1,787 +3%
PFSRSONJ
115
Police & Firemen's Retirement System of New Jersey
New Jersey
$1.43M +$880K +37,269 +161%
Neuberger Berman Group
116
Neuberger Berman Group
New York
$1.39M +$1.01M +42,647 +264%
YCM
117
Yousif Capital Management
Michigan
$1.34M +$249K +10,526 +23%
William Blair & Company
118
William Blair & Company
Illinois
$1.34M +$55.9K +2,368 +4%
MSRPS
119
Maryland State Retirement & Pension System
Maryland
$1.22M +$65.7K +2,784 +6%
QCM
120
Quantinno Capital Management
New York
$1.22M +$244K +10,333 +25%
HCA
121
Hyperion Capital Advisors
New York
$1.22M +$777K +32,901 +177%
TRSOTSOK
122
Teachers Retirement System of the State of Kentucky
Kentucky
$1.21M -$106K -4,480 -8%
Ohio Public Employees Retirement System (OPERS)
123
Ohio Public Employees Retirement System (OPERS)
Ohio
$1.21M +$87.1K +3,688 +8%
MG
124
Marex Group
$1.18M +$1.18M +50,000 New
Barclays
125
Barclays
United Kingdom
$1.16M -$148K -6,265 -11%
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5
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