CA
AMTM

Cliff Asness’s Amentum Holdings AMTM Stock Holding History

Cliff Asness’s Portfolio AMTM Stock Details AMTM Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$12.4M Buy
601,900
+94,057
+19% +$2.27M ﹤0.01% 1437
2026
Q1 		$13.2M Sell
507,843
-944,206
-65% -$29.6M 0.01% 1219
2025
Q4 		$42.1M Buy
1,452,049
+1,286,844
+779% +$32.9M 0.02% 715
2025
Q3 		$3.96M Sell
165,205
-184,998
-53% -$4.5M ﹤0.01% 1589
2025
Q2 		$8.27M Buy
+350,203
New +$7.32M 0.01% 1048
2025
Q1 		– Sell
-84,357
Closed -$1.77M – 3211
2024
Q4 		$1.77M Sell
84,357
-554,969
-87% -$14.3M ﹤0.01% 1597
2024
Q3 		$15.3M Buy
+639,326
New +$18.2M 0.02% 698

Other funds holding AMTM

Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $169B AUM 114.72% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
FCM
Frontier Capital Management Boston, Massachusetts $10.7B AUM 67.78% 1-Year Est. Return
TCA
Troluce Capital Advisors Dorado, Puerto Rico $971M AUM 2.27% 1-Year Est. Return

Cliff Asness's AMTM Position: Q2 2026 in Review

Cliff Asness increased its Amentum Holdings (AMTM) stake by 19% in Q2 2026, buying an estimated $2.27M and bringing the position to 601,900 shares worth $12.4M. The position accounts for ﹤0.01% of the portfolio, ranked #1437.

Cliff Asness first reported a position in AMTM in Q3 2024 and has held it in 7 quarters since. The position peaked at $42.1M in Q4 2025. 457 funds tracked by Wall St. Rank hold AMTM as of Q2 2026.

  • Cliff Asness held 601,900 shares of Amentum Holdings worth $12.4M as of Q2 2026.
  • Cliff Asness bought 94,057 Amentum Holdings shares in Q2 2026, an estimated $2.27M.
  • Amentum Holdings made up ﹤0.01% of Cliff Asness's portfolio in Q2 2026, its #1437 holding.
  • Cliff Asness first reported a position in Amentum Holdings in Q3 2024 and has held it in 7 quarters since.
  • Cliff Asness's Amentum Holdings position peaked at $42.1M in Q4 2025.
  • 457 funds tracked by Wall St. Rank held Amentum Holdings as of Q2 2026.

Based on AQR Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.