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Amentum Holdings

483 hedge funds and large institutions have $5.64B invested in Amentum Holdings in 2025 Q4 according to their latest regulatory filings, with 88 funds opening new positions, 133 increasing their positions, 158 reducing their positions, and 57 closing their positions.

New
Increased
Maintained
Reduced
Closed

143% more call options, than puts

Call options by funds: $73.7M | Put options by funds: $30.3M

54% more first-time investments, than exits

New positions opened: 88 | Existing positions closed: 57

22% more capital invested

Capital invested by funds: $4.63B → $5.64B (+$1.01B)

11% more funds holding in top 10

Funds holding in top 10: 910 (+1)

5% more funds holding

Funds holding: 462483 (+21)

4.16% more ownership

Funds ownership: 79.49%83.65% (+4.2%)

16% less repeat investments, than reductions

Existing positions increased: 133 | Existing positions reduced: 158

Holders
483
Holders Change
+21
Holders Change %
+4.55%
% of All Funds
5.88%
Holding in Top 10
10
Holding in Top 10 Change
+1
Holding in Top 10 Change %
+11.11%
% of All Funds
0.12%
New
88
Increased
133
Reduced
158
Closed
57
Calls
$73.7M
Puts
$30.3M
Net Calls
+$43.4M
Net Calls Change
+$35.8M
Name Holding Trade Value Shares
Change
Change in
Stake
AA
51
Ancora Advisors
Ohio
$11.7M +$6.86M +268,472 +201%
VA
52
Vident Advisory
Georgia
$11.1M -$1.84M -72,164 -16%
First Trust Advisors
53
First Trust Advisors
Illinois
$11M +$8.67M +339,238 +879%
Legal & General Group
54
Legal & General Group
United Kingdom
$10.7M -$503K -19,684 -5%
ACB
55
Aristotle Capital Boston
Massachusetts
$10.4M -$1.29M -50,276 -12%
SG Americas Securities
56
SG Americas Securities
New York
$10M +$8.09M +316,277 +1,088%
Ameriprise
57
Ameriprise
Minnesota
$9.82M -$443K -17,347 -5%
LA
58
Legacy Advisors
Pennsylvania
$9.81M +$251M +9,814,289 New
Swiss National Bank
59
Swiss National Bank
Switzerland
$9.04M +$135K +5,300 +2%
ETC
60
Exchange Traded Concepts
Oklahoma
$9.01M +$1.1M +43,027 +16%
Comerica Bank
61
Comerica Bank
Texas
$8.75M -$283K -11,075 -4%
RhumbLine Advisers
62
RhumbLine Advisers
Massachusetts
$8.45M +$41.5K +1,623 +0.6%
GC
63
Grizzlyrock Capital
Illinois
$8.27M +$51.1K +2,000 +0.7%
California Public Employees Retirement System
64
California Public Employees Retirement System
California
$8.08M +$1.19M +46,635 +20%
Hotchkis & Wiley Capital Management
65
Hotchkis & Wiley Capital Management
California
$7.78M +$6.26K +245 +0.1%
Balyasny Asset Management
66
Balyasny Asset Management
Illinois
$7.77M +$5.93M +231,989 +644%
Royal Bank of Canada
67
Royal Bank of Canada
Ontario, Canada
$7.73M +$626K +24,487 +10%
UBS AM
68
UBS AM
Illinois
$7.34M -$636K -24,881 -9%
AC
69
AWH Capital
Texas
$6.82M
CP
70
CenterBook Partners
Connecticut
$6.44M -$2.19M -85,858 -28%
SFI
71
Susquehanna Fundamental Investments
Pennsylvania
$6.38M +$4.23M +165,594 +305%
SEI Investments
72
SEI Investments
Pennsylvania
$6.29M +$422K +16,521 +8%
UBS Group
73
UBS Group
Switzerland
$5.98M -$641K -25,088 -11%
OCA
74
OpenArc Corporate Advisory
Georgia
$5.81M +$5.12M +200,325 New
HVP
75
Hudson Value Partners
Florida
$5.5M +$55.4K +2,168 +1%