Quantinno Capital Management’s Amentum Holdings AMTM Stock Holding History

Quantinno Capital 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	$2.05M	Sell	99,067 -46,507	-32%	-$1.12M	﹤0.01%	1947
2026 Q1	$3.8M	Buy	145,574 +67,603	+87%	+$2.12M	0.01%	1272
2025 Q4	$2.26M	Buy	77,971 +12,920	+20%	+$330K	﹤0.01%	1319
2025 Q3	$1.56M	Buy	65,051 +13,508	+26%	+$329K	﹤0.01%	1308
2025 Q2	$1.22M	Buy	51,543 +10,333	+25%	+$216K	0.01%	1251
2025 Q1	$750K	Buy	41,210 +3,895	+10%	+$79.3K	﹤0.01%	1249
2024 Q4	$785K	Buy	37,315 +10,022	+37%	+$259K	0.01%	1112
2024 Q3	$880K	Buy	+27,293	New	+$778K	0.01%	978

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

Quantinno Capital Management's AMTM Position: Q2 2026 in Review

Quantinno Capital Management reduced its Amentum Holdings (AMTM) stake by 32% in Q2 2026, selling an estimated $1.12M and leaving 99,067 shares worth $2.05M. The position accounts for ﹤0.01% of the portfolio, ranked #1947.

Quantinno Capital Management first reported a position in AMTM in Q3 2024 and has held it in 8 quarters since. The position peaked at $3.8M in Q1 2026. 462 funds tracked by Wall St. Rank hold AMTM as of Q2 2026.

Quantinno Capital Management held 99,067 shares of Amentum Holdings worth $2.05M as of Q2 2026.
Quantinno Capital Management sold 46,507 Amentum Holdings shares in Q2 2026, an estimated $1.12M.
Amentum Holdings made up ﹤0.01% of Quantinno Capital Management's portfolio in Q2 2026, its #1947 holding.
Quantinno Capital Management first reported a position in Amentum Holdings in Q3 2024 and has held it in 8 quarters since.
Quantinno Capital Management's Amentum Holdings position peaked at $3.8M in Q1 2026.
462 funds tracked by Wall St. Rank held Amentum Holdings as of Q2 2026.

Based on Quantinno Capital Management's 13F filing for Q2 2026, filed 13 Aug 2026.