Simplex Trading’s Amentum Holdings AMTM Stock Holding History

Simplex Trading’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	-52,827	Closed	-$1.1M	–	9957
2025 Q1	$961K	Sell	52,827 -167,154	-76%	-$3.4M	﹤0.01%	2741
2024 Q4	$4.63M	Buy	+219,981	New	+$5.69M	﹤0.01%	1529

Other funds holding AMTM

American Securities New York $3.93B AUM 52.22% 1-Year Est. Return

Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

Primecap Management Pasadena, California $127B AUM 44.11% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

FCM

Frontier Capital Management Boston, Massachusetts $9.73B AUM 55.65% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

Simplex Trading's AMTM Position: Q2 2025 in Review

Simplex Trading sold out of Amentum Holdings (AMTM) in Q2 2025, closing a stake of 52,827 shares — an estimated $1.1M sold.

Simplex Trading first reported a position in AMTM in Q4 2024 and held it in 2 quarters. The position peaked at $4.63M in Q4 2024. 460 funds tracked by Wall St. Rank hold AMTM as of Q2 2025.

Simplex Trading reported no remaining Amentum Holdings position as of Q2 2025 after selling out during the quarter.
Simplex Trading sold 52,827 Amentum Holdings shares in Q2 2025, an estimated $1.1M.
Simplex Trading first reported a position in Amentum Holdings in Q4 2024 and held it in 2 quarters.
Simplex Trading's Amentum Holdings position peaked at $4.63M in Q4 2024.
460 funds tracked by Wall St. Rank held Amentum Holdings as of Q2 2025.

Based on Simplex Trading's 13F filing for Q2 2025, filed 5 Aug 2025.