JG
AMTM

Joel Greenblatt’s Amentum Holdings AMTM Stock Holding History

Joel Greenblatt’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 		$3.23M Sell
156,113
-364,928
-70% -$8.83M 0.01% 1044
2026
Q1 		$13.6M Sell
521,041
-114,389
-18% -$3.59M 0.04% 594
2025
Q4 		$18.4M Buy
635,430
+390,604
+160% +$9.99M 0.07% 423
2025
Q3 		$5.86M Buy
+244,826
New +$5.96M 0.03% 728

Other funds holding AMTM

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
TCA
Troluce Capital Advisors Dorado, Puerto Rico $971M AUM 2.27% 1-Year Est. Return

Joel Greenblatt's AMTM Position: Q2 2026 in Review

Joel Greenblatt reduced its Amentum Holdings (AMTM) stake by 70% in Q2 2026, selling an estimated $8.83M and leaving 156,113 shares worth $3.23M. The position accounts for 0.01% of the portfolio, ranked #1044.

Joel Greenblatt first reported a position in AMTM in Q3 2025 and has held it in 4 quarters since. The position peaked at $18.4M in Q4 2025. 457 funds tracked by Wall St. Rank hold AMTM as of Q2 2026.

  • Joel Greenblatt held 156,113 shares of Amentum Holdings worth $3.23M as of Q2 2026.
  • Joel Greenblatt sold 364,928 Amentum Holdings shares in Q2 2026, an estimated $8.83M.
  • Amentum Holdings made up 0.01% of Joel Greenblatt's portfolio in Q2 2026, its #1044 holding.
  • Joel Greenblatt first reported a position in Amentum Holdings in Q3 2025 and has held it in 4 quarters since.
  • Joel Greenblatt's Amentum Holdings position peaked at $18.4M in Q4 2025.
  • 457 funds tracked by Wall St. Rank held Amentum Holdings as of Q2 2026.

Based on Gotham Asset Management's 13F filing for Q2 2026, filed 14 Aug 2026.