AMTM

Amentum Holdings

450 hedge funds and large institutions have $4.63B invested in Amentum Holdings in 2025 Q3 according to their latest regulatory filings, with 76 funds opening new positions, 102 increasing their positions, 175 reducing their positions, and 69 closing their positions.

New
Increased
Maintained
Reduced
Closed

more call options, than puts

Call options by funds: $ | Put options by funds: $

more first-time investments, than exits

New positions opened: | Existing positions closed:

more funds holding in top 10

Funds holding in top 10:

less capital invested

Capital invested by funds: $ → $

1% less funds holding

Funds holding: 456450 (-6)

2.87% less ownership

Funds ownership: 82.31%79.44% (-2.9%)

42% less repeat investments, than reductions

Existing positions increased: 102 | Existing positions reduced: 175

Holders
450
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
9
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$22.9M
Puts
$15.4M
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
IMRF
101
Illinois Municipal Retirement Fund
Illinois
$1.98M
BMCM
102
Bryn Mawr Capital Management
Pennsylvania
$1.91M
CAG
103
Crestwood Advisors Group
Massachusetts
$1.86M
SOADOR
104
State of Alaska Department of Revenue
Alaska
$1.85M
Citigroup
105
Citigroup
New York
$1.84M
OC
106
Oppenheimer & Co
New York
$1.81M
AGM
107
Alpine Global Management
New York
$1.8M
PFSRSONJ
108
Police & Firemen's Retirement System of New Jersey
New Jersey
$1.72M
Treasurer of the State of North Carolina
109
Treasurer of the State of North Carolina
North Carolina
$1.71M
LSERS
110
Louisiana State Employees Retirement System
Louisiana
$1.69M
Janus Henderson Group
111
Janus Henderson Group
United Kingdom
$1.66M
CSS
112
Cubist Systematic Strategies
Connecticut
$1.64M
WAM
113
Wolverine Asset Management
Illinois
$1.63M
Natixis Advisors
114
Natixis Advisors
Massachusetts
$1.6M
HCM
115
Hahn Capital Management
California
$1.57M
QCM
116
Quantinno Capital Management
New York
$1.56M
State of Tennessee, Department of Treasury
117
State of Tennessee, Department of Treasury
Tennessee
$1.55M
SDIC
118
South Dakota Investment Council
South Dakota
$1.54M
SFI
119
Susquehanna Fundamental Investments
Pennsylvania
$1.3M
Teacher Retirement System of Texas
120
Teacher Retirement System of Texas
Texas
$1.29M
Barclays
121
Barclays
United Kingdom
$1.29M
WG
122
Winton Group
United Kingdom
$1.28M
Ohio Public Employees Retirement System (OPERS)
123
Ohio Public Employees Retirement System (OPERS)
Ohio
$1.23M
William Blair & Company
124
William Blair & Company
Illinois
$1.21M
XT
125
XTX Topco
Cayman Islands
$1.18M