Royce & Associates’s Amentum Holdings AMTM Stock Holding History

Royce & Associates’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	$14.4M	Buy	697,368 +147,590	+27%	+$3.57M	0.12%	295
2026 Q1	$14.3M	Buy	549,778 +54,492	+11%	+$1.71M	0.14%	231
2025 Q4	$14.4M	Buy	495,286 +40,786	+9%	+$1.04M	0.15%	213
2025 Q3	$10.9M	Buy	454,500 +119,500	+36%	+$2.91M	0.11%	278
2025 Q2	$7.91M	Buy	+335,000	New	+$7M	0.08%	351
2025 Q1	–	Sell	-22,500	Closed	-$473K	–	871
2024 Q4	$473K	Hold	22,500	–	–	﹤0.01%	767
2024 Q3	$726K	Buy	+22,500	New	+$641K	0.01%	765

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

Royce & Associates's AMTM Position: Q2 2026 in Review

Royce & Associates increased its Amentum Holdings (AMTM) stake by 27% in Q2 2026, buying an estimated $3.57M and bringing the position to 697,368 shares worth $14.4M. The position accounts for 0.12% of the portfolio, ranked #295.

Royce & Associates first reported a position in AMTM in Q3 2024 and has held it in 7 quarters since. 458 funds tracked by Wall St. Rank hold AMTM as of Q2 2026.

Royce & Associates held 697,368 shares of Amentum Holdings worth $14.4M as of Q2 2026.
Royce & Associates bought 147,590 Amentum Holdings shares in Q2 2026, an estimated $3.57M.
Amentum Holdings made up 0.12% of Royce & Associates's portfolio in Q2 2026, its #295 holding.
Royce & Associates first reported a position in Amentum Holdings in Q3 2024 and has held it in 7 quarters since.
458 funds tracked by Wall St. Rank held Amentum Holdings as of Q2 2026.

Based on Royce & Associates's 13F filing for Q2 2026, filed 14 Aug 2026.