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 		$4.36M Buy
167,000
+20,700
+14% +$650K 0.01% 1408
2025
Q4 		$4.24M Buy
146,300
+64,800
+80% +$1.66M 0.01% 1652
2025
Q3 		$1.95M Sell
81,500
-128,500
-61% -$3.13M ﹤0.01% 2341
2025
Q2 		$4.96M Sell
210,000
-344,200
-62% -$7.19M 0.01% 1333
2025
Q1 		$10.1M Buy
554,200
+503,600
+995% +$10.3M 0.03% 621
2024
Q4 		$1.06M Buy
+50,600
New +$1.31M ﹤0.01% 2521

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.