Simplex Trading
AMTM

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
2026
Q1 		$261K Sell
10,000
-10,800
-52% -$339K ﹤0.01% 3980
2025
Q4 		$603K Sell
20,800
-2,500
-11% -$63.9K ﹤0.01% 3117
2025
Q3 		$558K Sell
23,300
-31,600
-58% -$769K ﹤0.01% 3693
2025
Q2 		$1.3M Sell
54,900
-93,100
-63% -$1.95M ﹤0.01% 2510
2025
Q1 		$2.69M Sell
148,000
-220,700
-60% -$4.5M ﹤0.01% 1764
2024
Q4 		$7.75M Buy
+368,700
New +$9.53M ﹤0.01% 1186

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 $5.72T AUM 30.48% 1-Year Est. Return
Primecap Management
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
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
State Street
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
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.