PEAK6’s Amentum Holdings AMTM Stock Holding History

PEAK6’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	–	Sell	-59,500	Closed	-$1.55M	–	3334
2026 Q1	$1.55M	Sell	59,500 -358,900	-86%	-$11.3M	﹤0.01%	1507
2025 Q4	$12.1M	Buy	+418,400	New	+$10.7M	0.02%	563
2025 Q3	–	Sell	-42,700	Closed	-$1.01M	–	3582
2025 Q2	$1.01M	Buy	+42,700	New	+$892K	﹤0.01%	1806

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 $3.38T AUM 44.17% 1-Year Est. Return

FCM

Frontier Capital Management Boston, Massachusetts $10.7B AUM 67.78% 1-Year Est. Return

PEAK6's AMTM Position: Q2 2026 in Review

PEAK6 sold out of Amentum Holdings (AMTM) in Q2 2026, closing a stake of 2,783 shares — an estimated $72.6K sold.

PEAK6 first reported a position in AMTM in Q1 2026 and held it in 1 quarter. The position peaked at $72.6K in Q1 2026. 464 funds tracked by Wall St. Rank hold AMTM as of Q2 2026.

PEAK6 reported no remaining Amentum Holdings position as of Q2 2026 after selling out during the quarter.
PEAK6 sold 2,783 Amentum Holdings shares in Q2 2026, an estimated $72.6K.
PEAK6 first reported a position in Amentum Holdings in Q1 2026 and held it in 1 quarter.
PEAK6's Amentum Holdings position peaked at $72.6K in Q1 2026.
464 funds tracked by Wall St. Rank held Amentum Holdings as of Q2 2026.

Based on PEAK6's 13F filing for Q2 2026, filed 13 Aug 2026.