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 %
Dimensional Fund Advisors
26
Dimensional Fund Advisors
Texas
$31.5M 1,334,752 +221,098 +20%
Loomis, Sayles & Company
27
Loomis, Sayles & Company
Massachusetts
$25M 1,059,209 +623,535 +143%
PCM
28
Penn Capital Management
Pennsylvania
$23.8M 1,003,472 +114,038 +13%
BCM
29
Brightline Capital Management
Florida
$23.6M 1,000,000 +1,000,000 New
Northern Trust
30
Northern Trust
Illinois
$22.2M 941,033 +86,610 +10%
AC
31
Avenir Corporation
Virginia
$21.1M 895,352 -8,810 -1%
Bank of America
32
Bank of America
North Carolina
$20.5M 868,265 -100,273 -10%
Bank of New York Mellon
33
Bank of New York Mellon
New York
$20.5M 868,206 +107,697 +14%
CAM
34
Cacti Asset Management
Georgia
$19.9M 848,946 +14,504 +2%
UBS Group
35
UBS Group
Switzerland
$18.1M 766,304 -763,830 -50%
Principal Financial Group
36
Principal Financial Group
Iowa
$17.6M 744,517 +32,345 +5%
BGDI
37
BW Gestao de Investimentos
Brazil
$16.9M 715,065 +320,665 +81%
New York State Common Retirement Fund
38
New York State Common Retirement Fund
New York
$16.4M 693,777 +81,990 +13%
VOYA Investment Management
39
VOYA Investment Management
Georgia
$15.4M 651,572 +23,418 +4%
KGI
40
Kopernik Global Investors
Florida
$15M 636,226 -441,269 -41%
ECM
41
Engine Capital Management
New York
$15M 635,255 – –
CA
42
CSM Advisors
Pennsylvania
$14.9M 633,048 -5,009 -0.8%
MCM
43
Moore Capital Management
New York
$14.4M 611,123 +112,859 +23%
NL
44
Nuveen LLC
North Carolina
$12.2M 516,574 +228,773 +79%
Public Sector Pension Investment Board (PSP Investments)
45
Public Sector Pension Investment Board (PSP Investments)
Quebec, Canada
$12.1M 514,172 +59,043 +13%
LC
46
Loews Corp
New York
$11.1M 470,000 -102,684 -18%
CI Investments Inc
47
CI Investments Inc
Ontario, Canada
$10.7M 454,422 +10,841 +2%
Royal Bank of Canada
48
Royal Bank of Canada
Ontario, Canada
$10.5M 443,200 -138,995 -24%
VA
49
Vident Advisory
Georgia
$10.2M 432,165 +139,308 +48%
UBS AM
50
UBS AM
Illinois
$10.2M 430,542 +157,259 +58%
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