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AMTM

Amentum Holdings
AMTM

462 hedge funds and large institutions have $4.63B invested in Amentum Holdings in 2025 Q3 according to their latest regulatory filings, with 76 funds opening new positions, 104 increasing their positions, 179 reducing their positions, and 69 closing their positions.

New
Increased
Maintained
Reduced
Closed

49% more call options, than puts

Call options by funds: $22.9M | Put options by funds: $15.4M

10% more first-time investments, than exits

New positions opened: 76 | Existing positions closed: 69

0% more funds holding

Funds holding: 460 → 462 (+2)

0% more funds holding in top 10

Funds holding in top 10: 9 → 9 (0)

2% less capital invested

Capital invested by funds: $4.73B → $4.63B (-$98.4M)

2.85% less ownership

Funds ownership: 82.34% → 79.49% (-2.8%)

42% less repeat investments, than reductions

Existing positions increased: 104 | Existing positions reduced: 179

Holders
462
Holders Change
+2
Holders Change %
+0.43%
% of All Funds
6.06%
Holding in Top 10
9
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.12%
New
76
Increased
104
Reduced
179
Closed
69
Calls
$22.9M
Puts
$15.4M
Net Calls
+$7.56M
Net Calls Change
-$17.7M

Top Buyers

Rank Fund Capital Flow
1
Invesco
Invesco
Georgia
+$61.8M
2
Fidelity Investments
Fidelity Investments
Massachusetts
+$40.4M
3
Verition Fund Management
Verition Fund Management
Connecticut
+$25.4M
4
Point72 Asset Management
Point72 Asset Management
Connecticut
+$25.1M
5
Mirae Asset Global ETFs Holdings
Mirae Asset Global ETFs Holdings
Hong Kong
+$17.1M

Top Sellers

Rank Fund Capital Flow
1
Millennium Management
Millennium Management
New York
-$98M
2
VanEck Associates
VanEck Associates
New York
-$56.1M
3
DCM
Discovery Capital Management
Connecticut
-$28.2M
4
BlackRock
BlackRock
New York
-$24.5M
5
Vanguard Group
Vanguard Group
Pennsylvania
-$23.8M
Name Holding Trade Value Shares
Change 		Change in
Stake
PWAM
451
Private Wealth Asset Management
Iowa
$48 – – –
SA
452
Scarborough Advisors
Maryland
$48 – – –
TFA
453
Transamerica Financial Advisors
Florida
$48 +$49 +2 New
DWS
454
Dynamic Wealth Strategies
California
$24 -$1.31K -54 -98%
CAM
455
Costello Asset Management
Pennsylvania
$24 -$292 -12 -92%
AWM
456
Activest Wealth Management
Florida
$24 -$49 -2 -67%
CTC
457
Cetera Trust Company
Minnesota
$24 – – –
SC
458
Swan Capital
Florida
$24 – – –
FHC
459
First Horizon Corporation
Tennessee
$24 +$24 +1 New
SS
460
Sunbelt Securities
Texas
$24 +$24 +1 New
WW
461
Winnow Wealth
Texas
$24 +$24 +1 New
Norges Bank
462
Norges Bank
Norway
– -$51M -2,160,728 Closed
KGI
463
Kopernik Global Investors
Florida
– -$15M -636,226 Closed
ECM
464
Engine Capital Management
New York
– -$15M -635,255 Closed
LC
465
Loews Corp
New York
– -$11.1M -470,000 Closed
ACM
466
Arosa Capital Management
Florida
– -$5.96M -252,500 Closed
YIH
467
Y-Intercept (HK)
Hong Kong
– -$4.69M -198,726 Closed
Nomura Holdings
468
Nomura Holdings
Japan
– -$2.55M -108,212 Closed
RA
469
RFG Advisory
Alabama
– -$2.41M -102,171 Closed
Marshall Wace
470
Marshall Wace
United Kingdom
– -$1.77M -74,831 Closed
MG
471
Marex Group
– -$1.18M -50,000 Closed
FIG
472
Fortress Investment Group
New York
– -$900K -38,106 Closed
NAM
473
Nexpoint Asset Management
Texas
– -$833K -35,263 Closed
OTL
474
Oak Thistle LLC
New York
– -$667K -28,230 Closed
PCP
475
Proficio Capital Partners
Massachusetts
– -$615K -26,031 Closed
17 18
19
20 21

AMTM Hedge Fund Activity: Q3 2025 in Review

462 of the 7,619 institutional investors tracked by Wall St. Rank reported a position in Amentum Holdings (AMTM) for Q3 2025, worth a combined $4.63B — down 2.1% from $4.73B a quarter earlier.

Buyers outnumbered sellers: 76 funds opened new AMTM positions and 69 closed out — a net gain of 7 holders — while 104 added to existing stakes and 179 trimmed.

The largest buyer was Invesco, adding an estimated $61.8M. The largest seller was Millennium Management, cutting an estimated $98M.

  • 462 institutional investors held Amentum Holdings (AMTM) as of Q3 2025, up from 460 in Q2 2025.
  • Funds reported $4.63B of Amentum Holdings stock for Q3 2025, down 2.1% quarter-over-quarter.
  • 76 funds opened new Amentum Holdings positions in Q3 2025 and 69 closed out, a net change of +7 holders.
  • The largest Amentum Holdings buyer in Q3 2025 was Invesco, an estimated $61.8M added.
  • The largest Amentum Holdings seller in Q3 2025 was Millennium Management, an estimated $98M sold.

Based on aggregated 13F filings for Q3 2025.