State Street’s Amentum Holdings AMTM Stock Holding History

State 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 Q2	$106M	Buy	5,151,772 +72,731	+1%	+$1.76M	﹤0.01%	1452
2026 Q1	$132M	Buy	5,079,041 +17,421	+0.3%	+$547K	﹤0.01%	1206
2025 Q4	$147M	Sell	5,061,620 -1,771,756	-26%	-$45.3M	﹤0.01%	1132
2025 Q3	$164M	Sell	6,833,376 -244,873	-3%	-$5.96M	0.01%	1055
2025 Q2	$167M	Buy	7,078,249 +501,898	+8%	+$10.5M	0.01%	1021
2025 Q1	$120M	Buy	6,576,351 +122,098	+2%	+$2.49M	﹤0.01%	1175
2024 Q4	$136M	Sell	6,454,253 -873,055	-12%	-$22.6M	0.01%	1164
2024 Q3	$236M	Buy	+7,327,308	New	+$209M	0.01%	819

Other funds holding AMTM

American Securities New York $3.75B AUM 23.12% 1-Year Est. Return

Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Primecap Management Pasadena, California $169B AUM 114.72% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 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

State Street's AMTM Position: Q2 2026 in Review

State Street increased its Amentum Holdings (AMTM) stake by 1.4% in Q2 2026, buying an estimated $1.76M and bringing the position to 5,151,772 shares worth $106M. The position accounts for ﹤0.01% of the portfolio, ranked #1452.

State Street first reported a position in AMTM in Q3 2024 and has held it in 8 quarters since. The position peaked at $236M in Q3 2024. 460 funds tracked by Wall St. Rank hold AMTM as of Q2 2026.

State Street held 5,151,772 shares of Amentum Holdings worth $106M as of Q2 2026.
State Street bought 72,731 Amentum Holdings shares in Q2 2026, an estimated $1.76M.
Amentum Holdings made up ﹤0.01% of State Street's portfolio in Q2 2026, its #1452 holding.
State Street first reported a position in Amentum Holdings in Q3 2024 and has held it in 8 quarters since.
State Street's Amentum Holdings position peaked at $236M in Q3 2024.
460 funds tracked by Wall St. Rank held Amentum Holdings as of Q2 2026.

Based on State Street's 13F filing for Q2 2026, filed 7 Aug 2026.