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 %
AS
1
American Securities
New York
$1.06B +$26.7M +1,132,839 +3%
Invesco
2
Invesco
Georgia
$462M +$56.3M +2,386,131 +14%
BlackRock
3
BlackRock
New York
$448M +$17.6M +746,094 +4%
Vanguard Group
4
Vanguard Group
Pennsylvania
$390M +$4.52M +191,265 +1%
Primecap Management
5
Primecap Management
California
$284M +$46.5M +1,969,067 +20%
State Street
6
State Street
Massachusetts
$167M +$11.8M +501,898 +8%
FCM
7
Frontier Capital Management
Massachusetts
$129M +$44.4M +1,882,011 +53%
Millennium Management
8
Millennium Management
New York
$110M +$62.7M +2,654,423 +132%
Fidelity Investments
9
Fidelity Investments
Massachusetts
$108M +$3.9M +164,981 +4%
VanEck Associates
10
VanEck Associates
New York
$72.4M +$11M +464,594 +18%
Kovitz Investment Group Partners
11
Kovitz Investment Group Partners
Illinois
$70.8M -$1.76M -74,635 -2%
TSW
12
Thompson Siegel & Walmsley
Virginia
$65.8M -$12.7M -539,465 -16%
Geode Capital Management
13
Geode Capital Management
Massachusetts
$59.4M +$5.03M +213,164 +9%
RCG
14
Ruane, Cunniff & Goldfarb
New York
$57.6M +$1.15M +48,704 +2%
DCM
15
Discovery Capital Management
Connecticut
$54.3M -$7.83M -331,800 -13%
Morgan Stanley
16
Morgan Stanley
New York
$51.4M +$1.99M +84,374 +4%
Norges Bank
17
Norges Bank
Norway
$51M +$51M +2,160,728 New
ACM
18
Arvin Capital Management
Texas
$50.5M +$10.7M +452,285 +27%
Fidelity International
19
Fidelity International
Bermuda
$48.8M -$3.36M -142,108 -6%
FGP
20
Freestone Grove Partners
California
$48.4M +$20.9M +887,024 +76%
Charles Schwab
21
Charles Schwab
California
$41.2M +$4.62M +195,855 +13%
Thrivent Financial for Lutherans
22
Thrivent Financial for Lutherans
Minnesota
$39.8M +$1.55M +65,781 +4%
6CM
23
683 Capital Management
New York
$38.5M +$14.6M +617,000 +61%
VC
24
Voss Capital
Texas
$33.1M -$19.4M -820,709 -37%
Mirae Asset Global ETFs Holdings
25
Mirae Asset Global ETFs Holdings
Hong Kong
$32.6M +$32.6M +1,379,752 New
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