Jane Street
AMTM

Jane Street’s Amentum Holdings AMTM Stock Holding History

Jane Street’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 		$5.01M Buy
191,979
+181,170
+1,676% +$5.68M 0.01% 3516
2025
Q4 		$313K Sell
10,809
-290,452
-96% -$7.42M ﹤0.01% 8736
2025
Q3 		$7.22M Buy
+301,261
New +$7.33M 0.01% 2867
2025
Q2 		– Sell
-601,760
Closed -$12.6M – 11400
2025
Q1 		$11M Buy
601,760
+574,270
+2,089% +$11.7M 0.02% 1878
2024
Q4 		$578K Sell
27,490
-29,657
-52% -$767K ﹤0.01% 6484
2024
Q3 		$1.84M Buy
+57,147
New +$1.63M ﹤0.01% 4646

Other funds holding AMTM

AS
American Securities New York $3.93B AUM 52.22% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $653B AUM 32.41% 1-Year Est. Return
BlackRock
BlackRock New York $5.7T 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