Caption Management’s Amentum Holdings AMTM Stock Holding History

Caption Management’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	$10.3M	Sell	500,000 -461,100	-48%	-$11.2M	0.05%	396
2026 Q1	$25.1M	Buy	961,100 +721,000	+300%	+$22.6M	0.15%	140
2025 Q4	$6.96M	Buy	+240,100	New	+$6.14M	0.05%	420
2025 Q3	–	Sell	-572,700	Closed	-$13.5M	–	2112
2025 Q2	$13.5M	Buy	572,700 +450,700	+369%	+$9.42M	0.15%	146
2025 Q1	$2.22M	Sell	122,000 -78,000	-39%	-$1.59M	0.02%	651
2024 Q4	$4.21M	Buy	+200,000	New	+$5.17M	0.04%	419

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

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

Caption Management's AMTM Position: Q2 2026 in Review

Caption Management increased its Amentum Holdings (AMTM) stake by 195% in Q2 2026, buying an estimated $1.02M and bringing the position to 64,000 shares worth $1.32M. The position accounts for 0.01% of the portfolio, ranked #1036.

Caption Management first reported a position in AMTM in Q4 2024 and has held it in 6 quarters since. The position peaked at $3.38M in Q4 2025. 461 funds tracked by Wall St. Rank hold AMTM as of Q2 2026.

Caption Management held 64,000 shares of Amentum Holdings worth $1.32M as of Q2 2026.
Caption Management bought 42,278 Amentum Holdings shares in Q2 2026, an estimated $1.02M.
Amentum Holdings made up 0.01% of Caption Management's portfolio in Q2 2026, its #1036 holding.
Caption Management first reported a position in Amentum Holdings in Q4 2024 and has held it in 6 quarters since.
Caption Management's Amentum Holdings position peaked at $3.38M in Q4 2025.
461 funds tracked by Wall St. Rank held Amentum Holdings as of Q2 2026.

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