Lee Ainslie’s Amentum Holdings AMTM Stock Holding History

Lee Ainslie’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	-46,335	Closed	-$1.21M	–	319
2026 Q1	$1.21M	Buy	+46,335	New	+$1.45M	0.01%	125

Other funds holding AMTM

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

TCA

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

Lee Ainslie's AMTM Position: Q2 2026 in Review

Lee Ainslie sold out of Amentum Holdings (AMTM) in Q2 2026, closing a stake of 46,335 shares — an estimated $1.21M sold.

Lee Ainslie first reported a position in AMTM in Q1 2026 and held it in 1 quarter. The position peaked at $1.21M in Q1 2026. 457 funds tracked by Wall St. Rank hold AMTM as of Q2 2026.

Lee Ainslie reported no remaining Amentum Holdings position as of Q2 2026 after selling out during the quarter.
Lee Ainslie sold 46,335 Amentum Holdings shares in Q2 2026, an estimated $1.21M.
Lee Ainslie first reported a position in Amentum Holdings in Q1 2026 and held it in 1 quarter.
Lee Ainslie's Amentum Holdings position peaked at $1.21M in Q1 2026.
457 funds tracked by Wall St. Rank held Amentum Holdings as of Q2 2026.

Based on Maverick Capital's 13F filing for Q2 2026, filed 14 Aug 2026.