Louisbourg Investments’s Amentum Holdings AMTM Stock Holding History

Louisbourg Investments’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	$103	Hold	5	–	–	﹤0.01%	203
2026 Q1	$130	Hold	5	–	–	﹤0.01%	210
2025 Q4	$145	Sell	5 -15	-75%	-$383	﹤0.01%	207
2025 Q3	$479	Sell	20 -135	-87%	-$3.29K	﹤0.01%	198
2025 Q2	$3.66K	Buy	+155	New	+$3.24K	﹤0.01%	177
2024 Q4	–	Sell	-38,368	Closed	-$1.02M	–	181
2024 Q3	$1.02M	Buy	+38,368	New	+$1.09M	0.26%	80

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

Louisbourg Investments's AMTM Position: Q2 2026 in Review

Louisbourg Investments held its Amentum Holdings (AMTM) position steady in Q2 2026 at 5 shares worth $103. The position accounts for ﹤0.01% of the portfolio, ranked #203.

Louisbourg Investments first reported a position in AMTM in Q3 2024 and has held it in 6 quarters since. The position peaked at $1.02M in Q3 2024. 458 funds tracked by Wall St. Rank hold AMTM as of Q2 2026.

Louisbourg Investments held 5 shares of Amentum Holdings worth $103 as of Q2 2026.
Louisbourg Investments left its Amentum Holdings share count unchanged in Q2 2026.
Amentum Holdings made up ﹤0.01% of Louisbourg Investments's portfolio in Q2 2026, its #203 holding.
Louisbourg Investments first reported a position in Amentum Holdings in Q3 2024 and has held it in 6 quarters since.
Louisbourg Investments's Amentum Holdings position peaked at $1.02M in Q3 2024.
458 funds tracked by Wall St. Rank held Amentum Holdings as of Q2 2026.

Based on Louisbourg Investments's 13F filing for Q2 2026, filed 23 Jul 2026.