Cliff Asness's AMTM Position Overview
Cliff Asness (via Aqr Capital Management LLC) currently holds 507,843 shares of Amentum Holdings, Inc. (AMTM) worth $13.17 M, representing 0.01% of the portfolio. First purchased in 2024-Q3, this short-term holding has been held for 7 quarters.
Based on 13F filings, Cliff Asness has maintained this position in AMTM for several quarters, showing initial confidence in the investment. Largest addition occurred in Q4 2025, adding 1.29 M shares. Largest reduction occurred in Q1 2026, reducing 944,206 shares.
Analysis based on 13F filings available since 2013 Q2
Cliff Asness's Amentum Holdings (AMTM) Holding Value Over Time
Track share changes against reported price movement
Quarterly Amentum Holdings (AMTM) Trades by Cliff Asness
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q1 2026 | -944,206 | Reduce 65.03% | 507,843 | $25.94 |
| Q4 2025 | +1.29 M | Add 778.94% | 1.45 M | $29.00 |
| Q3 2025 | -184,998 | Reduce 52.83% | 165,205 | $23.95 |
| Q2 2025 | +350,203 | New Buy | 350,203 | $23.61 |
| Q1 2025 | -84,357 | Sold Out | 0 | $0.00 |
| Q4 2024 | -554,969 | Reduce 86.81% | 84,357 | $21.03 |
| Q3 2024 | +639,326 | New Buy | 639,326 | $23.95 |
Cliff Asness's Amentum Holdings Investment FAQs
Cliff Asness first purchased Amentum Holdings, Inc. (AMTM) in Q3 2024, acquiring 639,326 shares, as reported in their 13F filing for that period. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
Cliff Asness has held Amentum Holdings, Inc. (AMTM) for 7 quarters since Q3 2024.
Cliff Asness's largest addition to Amentum Holdings, Inc. (AMTM) was in Q4 2025, adding 1,452,049 shares worth $42.11 M.
According to the latest 13F filing for Q1 2026, Cliff Asness's firm, Aqr Capital Management LLC, owns 507,843 shares of Amentum Holdings, Inc. (AMTM), valued at approximately $13.17 M.
As of the Q1 2026 filing, Amentum Holdings, Inc. (AMTM) represents approximately 0.01% of Cliff Asness's publicly disclosed stock portfolio, making it one of their key holdings.
Cliff Asness's peak holding in Amentum Holdings, Inc. (AMTM) was 1,452,049 shares, as reported at the end of Q4 2025.