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Of the 14 tracked institutions holding AMTM, 7 have a 3-year clone track record — 5 of them beat the S&P. Average holder's clone alpha: +3.3pt. It's a gauge of who owns the name, not just how many.
Among the 14 tracked institutional investors we monitor, AMTM (AMENTUM HOLDINGS INC) is held with a combined value of $1.14B across 48,852,394 shares. The largest holder is VANGUARD GROUP INC with a position worth $446.94M. Grantham, Mayo, Van Otterloo & Co. LLC opened a new position in the most recent quarter. 9 funds increased their holdings. 4 funds reduced their position.
Total Institutional Value
$1.14B
Total Shares Held
48,852,394
Institutional Holders
14
Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.
| # | Fund | Value↓ | Portfolio % | Change |
|---|---|---|---|---|
| 1 | VANGUARD GROUP INC | $446.94M | 0.01% | -0.9% |
| 2 | BlackRock, Inc. | $370.14M | 0.01% | +0.4% |
| 3 | FMR LLC | $117.39M | 0.01% | +1.8% |
| 4 | STATE STREET CORP | $106.49M | 0.00% | +1.4% |
| 5 | MILLENNIUM MANAGEMENT LLC | $43.98M | 0.03% | +237.2% |
| 6 | CITADEL ADVISORS LLC | $13.86M | 0.01% | +731.7% |
| 7 | Point72 Asset Management, L.P. | $13.44M | 0.02% | -60.1% |
| 8 | AQR CAPITAL MANAGEMENT LLC | $12.42M | 0.00% | +18.5% |
| 9 | TWO SIGMA ADVISERS, LP | $4.56M | 0.01% | -1.3% |
| 10 | Gotham Asset Management, LLC | $3.23M | 0.01% | -70.0% |
SEC Schedule 13D (activist) and 13G (passive) filings for AMTM. Filed when an investor acquires 5%+ ownership.
| Member | Type | Date |
|---|---|---|
| William R. Keating | Sell | Oct 31, 2024 |
| Thomas H. Jr. Kean | exchange | Sep 30, 2024 |
As of the latest SEC 13F filings, VANGUARD GROUP INC is the largest institutional holder of AMTM with a position worth $446.94M, representing 0.01% of their portfolio. In total, 14 institutional investors hold AMTM with a combined value of $1.14B.
In the most recent quarter, 1 fund opened a new position in AMTM. Additionally, 9 increased their holdings and 4 reduced their positions.
Institutional investors hold $1.14B worth of AMTM stock across 14 positions. The largest institutional holder is VANGUARD GROUP INC with $446.94M in holdings.
A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For AMTM, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.
Get notified when hedge funds change their AMTM positions.
Alpha = the manager's 3-year clone return minus the S&P 500. A skilled roster is a stronger tell than a crowded one — though even skilled managers' edge doesn't reliably survive the 13F disclosure lag. Why →
Last Close
$19.52
2026-10-16
YTD
-36.0%
7% of 52-week range
