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
Mirae Asset Global ETFs Holdings
4
Mirae Asset Global ETFs Holdings
Hong Kong
$0
5
CP
5
Castalian Partners
Minnesota
$5.54M
Name Market Value Shares Shares
Change 		Shares
Change %
CI Investments Inc
51
CI Investments Inc
Ontario, Canada
$8.07M 443,581 -199,534 -31%
Loomis, Sayles & Company
52
Loomis, Sayles & Company
Massachusetts
$7.93M 435,674 +435,674 New
CP
53
CenterBook Partners
Connecticut
$7.55M 414,574 +343,268 +481%
ACM
54
Arosa Capital Management
Florida
$7.41M 406,900 +56,900 +16%
BGDI
55
BW Gestao de Investimentos
Brazil
$7.18M 394,400 +394,400 New
Legal & General Group
56
Legal & General Group
United Kingdom
$7.12M 390,937 -287,166 -42%
MIM
57
Monashee Investment Management
Massachusetts
$6.55M 360,000 +360,000 New
Ameriprise
58
Ameriprise
Minnesota
$6.04M 331,597 -27,630 -8%
RhumbLine Advisers
59
RhumbLine Advisers
Massachusetts
$5.64M 310,103 +14,919 +5%
CP
60
Castalian Partners
Minnesota
$5.54M 304,500 -695,500 -70%
VA
61
Vident Advisory
Georgia
$5.33M 292,857 +277,594 +1,819%
Verition Fund Management
62
Verition Fund Management
Connecticut
$5.29M 290,706 -30,210 -9%
NL
63
Nuveen LLC
North Carolina
$5.24M 287,801 +287,801 New
UBS AM
64
UBS AM
Illinois
$4.97M 273,283 -451 -0.2%
Swiss National Bank
65
Swiss National Bank
Switzerland
$4.72M 259,200 -4,000 -2%
TCM
66
Telos Capital Management
California
$4.66M 256,178 -10,858 -4%
Comerica Bank
67
Comerica Bank
Texas
$4.53M 248,718 +199,931 +410%
Russell Investments Group
68
Russell Investments Group
United Kingdom
$4.24M 232,933 +107,395 +86%
TC
69
TwinBeech Capital
New York
$4.1M 225,438 +225,438 New
SEI Investments
70
SEI Investments
Pennsylvania
$3.68M 202,150 -85,163 -30%
HVP
71
Hudson Value Partners
Florida
$3.43M 188,283 +188,283 New
California Public Employees Retirement System
72
California Public Employees Retirement System
California
$3.42M 187,848 -9,671 -5%
Raymond James Financial
73
Raymond James Financial
Florida
$3.29M 180,572 +95,010 +111%
GC
74
Grizzlyrock Capital
Illinois
$2.99M 164,226 +164,226 New
Wealth Enhancement Advisory Services
75
Wealth Enhancement Advisory Services
Minnesota
$2.76M 151,801 +37,057 +32%
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3
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