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
Q2 		$711K Sell
34,400
-11,600
-25% -$281K ﹤0.01% 3180
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 $3.75B AUM 23.12% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $169B AUM 114.72% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 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 $10.7B AUM 67.78% 1-Year Est. Return

Group One Trading's AMTM Position: Q2 2026 in Review

Group One Trading opened a new position in Amentum Holdings (AMTM) in Q2 2026: 27,710 shares worth $573K. The stake represents ﹤0.01% of the portfolio and ranks #3359 among its holdings. This is a return to the name: Group One Trading previously reported a position in AMTM as recently as Q4 2025.

Group One Trading first reported a position in AMTM in Q3 2024 and has held it in 7 quarters since. The position peaked at $1.91M in Q1 2025. 464 funds tracked by Wall St. Rank hold AMTM as of Q2 2026.

  • Group One Trading held 27,710 shares of Amentum Holdings worth $573K as of Q2 2026.
  • Amentum Holdings was a new Group One Trading position in Q2 2026.
  • Amentum Holdings made up ﹤0.01% of Group One Trading's portfolio in Q2 2026, its #3359 holding.
  • Group One Trading first reported a position in Amentum Holdings in Q3 2024 and has held it in 7 quarters since.
  • Group One Trading's Amentum Holdings position peaked at $1.91M in Q1 2025.
  • 464 funds tracked by Wall St. Rank held Amentum Holdings as of Q2 2026.

Based on Group One Trading's 13F filing for Q2 2026, filed 14 Aug 2026.