Amentum Holdings, Inc. - AMTM
Sector:
Industrials
· Industry:
Specialty Business Services
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· Social:
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Company profile
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Quarter snapshot
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Q4 2025
· Q3 2025
Value (USD)
Total reported value ($000)
$5.74B
QoQ value delta ($000)
+$1.089B
(+23.42%)
Implied price effect (QoQ)
+15.53%
Shares
Total shares
207,484,798
QoQ shares delta
+13,267,130
(+6.83%)
Total shares held by funds (by quarter)
Market chart (AMTM)
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Top holders (Q4 2025)
Top 25 only
Full list
Early Q1 2026 data: only 6 institutional holders reported so far. More will appear as funds file with the SEC.
| Manager | Value ($000) | Shares | % of 13F |
|---|---|---|---|
| AMERICAN SECURITIES LLC | 1,305,775 | 45,026,743 | 100.0% |
| Invesco Ltd. | 633,186 | 21,834,003 | 0.1% |
| BlackRock, Inc. | 506,313 | 17,459,099 | 0.01% |
| VANGUARD GROUP INC | 446,940 | 15,411,745 | 0.01% |
| PRIMECAP MANAGEMENT CO/CA/ | 351,680 | 12,126,927 | 0.27% |
| FMR LLC | 194,511 | 6,707,304 | 0.01% |
| FRONTIER CAPITAL MANAGEMENT CO LLC | 167,416 | 5,772,976 | 1.78% |
| STATE STREET CORP | 146,786 | 5,061,620 | 0.0% |
| Focus Partners Wealth | 81,038 | 2,794,417 | 0.09% |
| GEODE CAPITAL MANAGEMENT, LLC | 77,145 | 2,659,364 | 0.0% |
| Ruane, Cunniff & Goldfarb L.P. | 69,429 | 2,394,129 | 1.08% |
| NORGES BANK | 66,528 | 2,294,097 | 0.01% |
| MORGAN STANLEY | 60,185 | 2,075,352 | 0.0% |
| THRIVENT FINANCIAL FOR LUTHERANS | 60,004 | 2,069,104 | 0.11% |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 56,895 | 1,961,927 | 0.09% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 56,608 | 1,952,002 | 0.01% |
| THOMPSON SIEGEL & WALMSLEY LLC | 55,732 | 1,921,809 | 0.93% |
| DIMENSIONAL FUND ADVISORS LP | 53,156 | 1,832,926 | 0.01% |
| Arvin Capital Management LP | 52,228 | 1,800,992 | 9.84% |
| COOPER CREEK PARTNERS MANAGEMENT LLC | 45,039 | 1,553,074 | 2.03% |
| AQR CAPITAL MANAGEMENT LLC | 42,109 | 1,452,049 | 0.02% |
| FIL Ltd | 41,452 | 1,429,384 | 0.03% |
| BRIGHTLINE CAPITAL MANAGEMENT, LLC | 40,368 | 1,392,000 | 16.32% |
| ExodusPoint Capital Management, LP | 34,341 | 1,184,186 | 0.27% |
| BANK OF AMERICA CORP /DE/ | 33,565 | 1,157,427 | 0.0% |