Group One Trading
AMTM

Group One Trading’s Amentum Holdings AMTM Stock Holding History

Group One 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 		$1.2M Buy
46,000
+6,600
+17% +$207K ﹤0.01% 2542
2025
Q4 		$1.14M Buy
39,400
+12,500
+46% +$320K ﹤0.01% 2769
2025
Q3 		$644K Sell
26,900
-97,400
-78% -$2.37M ﹤0.01% 3443
2025
Q2 		$2.93M Sell
124,300
-55,900
-31% -$1.17M 0.01% 1777
2025
Q1 		$3.28M Buy
180,200
+18,500
+11% +$377K 0.01% 1399
2024
Q4 		$3.4M Buy
+161,700
New +$4.18M 0.01% 1457

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

Group One Trading's AMTM Position: Q1 2026 in Review

Group One Trading sold out of Amentum Holdings (AMTM) in Q1 2026, closing a stake of 28,498 shares — an estimated $894K sold.

Group One Trading first reported a position in AMTM in Q3 2024 and held it in 6 quarters. The position peaked at $1.91M in Q1 2025. 486 funds tracked by Wall St. Rank hold AMTM as of Q1 2026.

  • Group One Trading reported no remaining Amentum Holdings position as of Q1 2026 after selling out during the quarter.
  • Group One Trading sold 28,498 Amentum Holdings shares in Q1 2026, an estimated $894K.
  • Group One Trading first reported a position in Amentum Holdings in Q3 2024 and held it in 6 quarters.
  • Group One Trading's Amentum Holdings position peaked at $1.91M in Q1 2025.
  • 486 funds tracked by Wall St. Rank held Amentum Holdings as of Q1 2026.

Based on Group One Trading's 13F filing for Q1 2026, filed 13 May 2026.