Grantham, Mayo, Van Otterloo & Co (GMO)
AMTM

Grantham, Mayo, Van Otterloo & Co (GMO)’s Amentum Holdings AMTM Stock Holding History

Grantham, Mayo, Van Otterloo & Co (GMO)’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
-10,457
Closed -$303K – 737
2025
Q4 		$303K Hold
10,457
– – ﹤0.01% 612
2025
Q3 		$250K Buy
+10,457
New +$255K ﹤0.01% 572

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

Grantham, Mayo, Van Otterloo & Co (GMO)'s AMTM Position: Q1 2026 in Review

Grantham, Mayo, Van Otterloo & Co (GMO) sold out of Amentum Holdings (AMTM) in Q1 2026, closing a stake of 10,457 shares — an estimated $303K sold.

Grantham, Mayo, Van Otterloo & Co (GMO) first reported a position in AMTM in Q3 2025 and held it in 2 quarters. The position peaked at $303K in Q4 2025. 486 funds tracked by Wall St. Rank hold AMTM as of Q1 2026.

  • Grantham, Mayo, Van Otterloo & Co (GMO) reported no remaining Amentum Holdings position as of Q1 2026 after selling out during the quarter.
  • Grantham, Mayo, Van Otterloo & Co (GMO) sold 10,457 Amentum Holdings shares in Q1 2026, an estimated $303K.
  • Grantham, Mayo, Van Otterloo & Co (GMO) first reported a position in Amentum Holdings in Q3 2025 and held it in 2 quarters.
  • Grantham, Mayo, Van Otterloo & Co (GMO)'s Amentum Holdings position peaked at $303K in Q4 2025.
  • 486 funds tracked by Wall St. Rank held Amentum Holdings as of Q1 2026.

Based on Grantham, Mayo, Van Otterloo & Co (GMO)'s 13F filing for Q1 2026, filed 14 May 2026.