Marshall Wace
AMTM

Marshall Wace’s Amentum Holdings AMTM Stock Holding History

Marshall Wace’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 		– Sell
-35,084
Closed -$1.02M – 3765
2025
Q4 		$1.02M Buy
+35,084
New +$897K ﹤0.01% 1913
2025
Q3 		– Sell
-74,831
Closed -$1.77M – 3518
2025
Q2 		$1.77M Sell
74,831
-72,521
-49% -$1.52M ﹤0.01% 1617
2025
Q1 		$2.68M Buy
+147,352
New +$3M ﹤0.01% 1342

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
State Street
State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return
FCM
Frontier Capital Management Boston, Massachusetts $10.7B AUM 67.78% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

Marshall Wace's AMTM Position: Q1 2026 in Review

Marshall Wace sold out of Amentum Holdings (AMTM) in Q1 2026, closing a stake of 35,084 shares — an estimated $1.02M sold.

Marshall Wace first reported a position in AMTM in Q1 2025 and held it in 3 quarters. The position peaked at $2.68M in Q1 2025. 487 funds tracked by Wall St. Rank hold AMTM as of Q1 2026.

  • Marshall Wace reported no remaining Amentum Holdings position as of Q1 2026 after selling out during the quarter.
  • Marshall Wace sold 35,084 Amentum Holdings shares in Q1 2026, an estimated $1.02M.
  • Marshall Wace first reported a position in Amentum Holdings in Q1 2025 and held it in 3 quarters.
  • Marshall Wace's Amentum Holdings position peaked at $2.68M in Q1 2025.
  • 487 funds tracked by Wall St. Rank held Amentum Holdings as of Q1 2026.

Based on Marshall Wace's 13F filing for Q1 2026, filed 15 May 2026.