Jim Simons
AMTM

Jim Simons’s Amentum Holdings AMTM Stock Holding History

Jim Simons’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
2025
Q2 		– Sell
-31,400
Closed -$571K – 3983
2025
Q1 		$571K Buy
31,400
+20,400
+185% +$415K ﹤0.01% 2688
2024
Q4 		$231K Sell
11,000
-429,500
-98% -$11.1M ﹤0.01% 3125
2024
Q3 		$14.2M Buy
+440,500
New +$12.5M 0.02% 857

Other funds holding AMTM

AS
American Securities New York $3.93B AUM 52.22% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $127B AUM 44.11% 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 $9.73B AUM 55.65% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
VanEck Associates
VanEck Associates New York $133B AUM 72.99% 1-Year Est. Return

Jim Simons's AMTM Position: Q2 2025 in Review

Jim Simons sold out of Amentum Holdings (AMTM) in Q2 2025, closing a stake of 31,400 shares — an estimated $571K sold.

Jim Simons first reported a position in AMTM in Q3 2024 and held it in 3 quarters. The position peaked at $14.2M in Q3 2024. 460 funds tracked by Wall St. Rank hold AMTM as of Q2 2025.

  • Jim Simons reported no remaining Amentum Holdings position as of Q2 2025 after selling out during the quarter.
  • Jim Simons sold 31,400 Amentum Holdings shares in Q2 2025, an estimated $571K.
  • Jim Simons first reported a position in Amentum Holdings in Q3 2024 and held it in 3 quarters.
  • Jim Simons's Amentum Holdings position peaked at $14.2M in Q3 2024.
  • 460 funds tracked by Wall St. Rank held Amentum Holdings as of Q2 2025.

Based on Renaissance Technologies's 13F filing for Q2 2025, filed 13 Aug 2025.