AMTM

Amentum Holdings, Inc.
AMTM

Overview Fund Activity

413 hedge funds and large institutions have $3.46B invested in Amentum Holdings, Inc. in 2025 Q1 according to their latest regulatory filings, with 76 funds opening new positions, 110 increasing their positions, 147 reducing their positions, and 96 closing their positions.

Holders
413
Holders Change
-32
Holders Change %
-7.19%
% of All Funds
5.61%
Holding in Top 10
5
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.07%
New
76
Increased
110
Reduced
147
Closed
96
Calls
$62.3M
Puts
$41.7M
Net Calls
+$20.6M
Net Calls Change
-$29.2M

Top Buyers

1
Primecap Management
1
Primecap Management
California
$183M
2
FCM
2
Frontier Capital Management
Massachusetts
$65.1M
3
Invesco
3
Invesco
Georgia
$313M
4
Citadel Advisors
4
Citadel Advisors
Florida
$53.3M
5
DCM
5
Discovery Capital Management
Connecticut
$47.9M

Top Sellers

1
CCPM
1
Cooper Creek Partners Management
New York
$22.3M
2
Allspring Global Investments
2
Allspring Global Investments
North Carolina
$0
3
Wellington Management Group
3
Wellington Management Group
Massachusetts
$0
4
Norges Bank
4
Norges Bank
Norway
$0
5
Mirae Asset Global ETFs Holdings
5
Mirae Asset Global ETFs Holdings
Hong Kong
$0
Name Market Value Shares Shares
Change 		Shares
Change %
AS
1
American Securities
New York
$799M 43,893,904 – –
BlackRock
2
BlackRock
New York
$332M 18,248,989 +1,474,218 +9%
Invesco
3
Invesco
Georgia
$313M 17,191,110 +3,334,871 +24%
Vanguard Group
4
Vanguard Group
Pennsylvania
$297M 16,342,560 -199,887 -1%
Primecap Management
5
Primecap Management
California
$183M 10,061,589 +3,647,210 +57%
State Street
6
State Street
Massachusetts
$120M 6,576,351 +122,098 +2%
Fidelity Investments
7
Fidelity Investments
Massachusetts
$80.2M 4,408,949 +2,013,896 +84%
FCM
8
Frontier Capital Management
Massachusetts
$65.1M 3,578,732 +3,578,732 New
TSW
9
Thompson Siegel & Walmsley
Virginia
$60.5M 3,326,378 +1,377,694 +71%
Kovitz Investment Group Partners
10
Kovitz Investment Group Partners
Illinois
$56M 3,075,305 -76,957 -2%
Citadel Advisors
11
Citadel Advisors
Florida
$53.3M 2,926,482 +2,531,660 +641%
DCM
12
Discovery Capital Management
Connecticut
$47.9M 2,630,930 +2,165,630 +465%
VanEck Associates
13
VanEck Associates
New York
$47.4M 2,603,564 +1,471,279 +130%
RCG
14
Ruane, Cunniff & Goldfarb
New York
$43.6M 2,393,039 -43,255 -2%
Geode Capital Management
15
Geode Capital Management
Massachusetts
$41.9M 2,299,997 +336,749 +17%
VC
16
Voss Capital
Texas
$40.4M 2,220,709 +1,770,891 +394%
Fidelity International
17
Fidelity International
Bermuda
$40.2M 2,209,313 +415,760 +23%
Morgan Stanley
18
Morgan Stanley
New York
$38.1M 2,092,848 +610,327 +41%
Millennium Management
19
Millennium Management
New York
$36.6M 2,011,792 +815,218 +68%
Balyasny Asset Management
20
Balyasny Asset Management
Illinois
$34.2M 1,880,887 +1,880,887 New
ACM
21
Arvin Capital Management
Texas
$30.7M 1,687,149 +721,952 +75%
Thrivent Financial for Lutherans
22
Thrivent Financial for Lutherans
Minnesota
$29.5M 1,621,324 +9,528 +0.6%
Charles Schwab
23
Charles Schwab
California
$28.2M 1,549,158 +284,901 +23%
UBS Group
24
UBS Group
Switzerland
$27.8M 1,530,134 +398,390 +35%
CCPM
25
Cooper Creek Partners Management
New York
$22.3M 1,223,986 -2,933,048 -71%
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