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AMTM

Amentum Holdings
AMTM

486 hedge funds and large institutions have $5.28B invested in Amentum Holdings in 2026 Q1 according to their latest regulatory filings, with 71 funds opening new positions, 150 increasing their positions, 152 reducing their positions, and 60 closing their positions.

New
Increased
Maintained
Reduced
Closed

212% more call options, than puts

Call options by funds: $134M | Put options by funds: $43M

18% more first-time investments, than exits

New positions opened: 71 | Existing positions closed: 60

2.86% more ownership

Funds ownership: 83.65% → 86.51% (+2.9%)

1% more funds holding

Funds holding: 483 → 486 (+3)

1% less repeat investments, than reductions

Existing positions increased: 150 | Existing positions reduced: 152

6% less capital invested

Capital invested by funds: $5.64B → $5.28B (-$362M)

10% less funds holding in top 10

Funds holding in top 10: 10 → 9 (-1)

Holders
486
Holders Change
+3
Holders Change %
+0.62%
% of All Funds
5.99%
Holding in Top 10
9
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-10%
% of All Funds
0.11%
New
71
Increased
150
Reduced
152
Closed
60
Calls
$134M
Puts
$43M
Net Calls
+$91.1M
Net Calls Change
+$47.8M

Top Buyers

1
Dimensional Fund Advisors
Dimensional Fund Advisors
Texas
+$61.3M
2
PIP
Permian Investment Partners
Texas
+$49.2M
3
Toronto Dominion Bank
Toronto Dominion Bank
Ontario, Canada
+$49.1M
4
UBS Group
UBS Group
Switzerland
+$47.2M
5
Bank of America
Bank of America
North Carolina
+$39.1M

Top Sellers

1
Fidelity Investments
Fidelity Investments
Massachusetts
-$35.4M
2
ECM
ExodusPoint Capital Management
New York
-$34.3M
3
AQR Capital Management
AQR Capital Management
Connecticut
-$29.6M
4
FCM
Frontier Capital Management
Massachusetts
-$26.4M
5
Fidelity International
Fidelity International
Bermuda
-$24.4M
Name Holding Trade Value Shares
Change 		Change in
Stake
AS
1
American Securities
New York
$1.17B – – –
Invesco
2
Invesco
Georgia
$560M -$11.3M -360,225 -2%
BlackRock
3
BlackRock
New York
$465M +$12M +382,184 +2%
Primecap Management
4
Primecap Management
California
$315M -$1.31M -41,633 -0.3%
VPM
5
Vanguard Portfolio Management
Pennsylvania
$205M +$246M +7,852,951 New
VCM
6
Vanguard Capital Management
Pennsylvania
$173M +$209M +6,650,879 New
Fidelity Investments
7
Fidelity Investments
Massachusetts
$145M -$35.4M -1,128,918 -17%
State Street
8
State Street
Massachusetts
$132M +$547K +17,421 +0.3%
FCM
9
Frontier Capital Management
Massachusetts
$129M -$26.4M -842,766 -15%
Dimensional Fund Advisors
10
Dimensional Fund Advisors
Texas
$98.8M +$61.3M +1,954,494 +107%
Geode Capital Management
11
Geode Capital Management
Massachusetts
$73.4M +$4.87M +155,051 +6%
Mirae Asset Global ETFs Holdings
12
Mirae Asset Global ETFs Holdings
Hong Kong
$72.6M +$25.8M +823,207 +42%
Focus Partners Wealth
13
Focus Partners Wealth
Massachusetts
$67.9M -$5.95M -189,506 -7%
Bank of America
14
Bank of America
North Carolina
$62.7M +$39.1M +1,247,614 +108%
Morgan Stanley
15
Morgan Stanley
New York
$58.3M +$5.01M +159,561 +8%
Thrivent Financial for Lutherans
16
Thrivent Financial for Lutherans
Minnesota
$54.8M +$984K +31,353 +2%
ACM
17
Arvin Capital Management
Texas
$54M +$13.6M +434,708 +27%
Charles Schwab
18
Charles Schwab
California
$53.9M +$3.64M +115,928 +6%
UBS Group
19
UBS Group
Switzerland
$44.6M +$47.2M +1,504,673 +730%
Point72 Asset Management
20
Point72 Asset Management
Connecticut
$42.5M +$29.3M +935,276 +135%
RCG
21
Ruane, Cunniff & Goldfarb
New York
$42.3M -$24.2M -771,147 -32%
SCM
22
Segra Capital Management
Florida
$42.1M +$31.6M +1,007,916 +167%
PIP
23
Permian Investment Partners
Texas
$40.9M +$49.2M +1,567,000 New
Toronto Dominion Bank
24
Toronto Dominion Bank
Ontario, Canada
$40.8M +$49.1M +1,565,223 New
TSW
25
Thompson Siegel & Walmsley
Virginia
$39.8M -$12.4M -395,925 -21%
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