MG
AMTM

Marex Group’s Amentum Holdings AMTM Stock Holding History

Marex Group’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 		– Sell
-53,043
Closed -$1.38M – 1373
2026
Q1 		$1.38M Buy
53,043
+40,041
+308% +$1.26M 0.01% 376
2025
Q4 		$377K Buy
+13,002
New +$332K ﹤0.01% 643
2025
Q3 		– Sell
-50,000
Closed -$1.18M – 1032
2025
Q2 		$1.18M Buy
+50,000
New +$1.04M 0.01% 274

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

Marex Group's AMTM Position: Q2 2026 in Review

Marex Group sold out of Amentum Holdings (AMTM) in Q2 2026, closing a stake of 53,043 shares — an estimated $1.38M sold.

Marex Group first reported a position in AMTM in Q2 2025 and held it in 3 quarters. The position peaked at $1.38M in Q1 2026. 462 funds tracked by Wall St. Rank hold AMTM as of Q2 2026.

  • Marex Group reported no remaining Amentum Holdings position as of Q2 2026 after selling out during the quarter.
  • Marex Group sold 53,043 Amentum Holdings shares in Q2 2026, an estimated $1.38M.
  • Marex Group first reported a position in Amentum Holdings in Q2 2025 and held it in 3 quarters.
  • Marex Group's Amentum Holdings position peaked at $1.38M in Q1 2026.
  • 462 funds tracked by Wall St. Rank held Amentum Holdings as of Q2 2026.

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