SEI Investments’s ACM Research ACMR Stock Holding History

SEI Investments’s Portfolio ACMR Stock Details ACMR Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$3.34M	Buy	85,005 +26,560	+45%	+$1.41M	﹤0.01%	1758
2025 Q4	$2.31M	Buy	58,445 +36,359	+165%	+$1.35M	﹤0.01%	1775
2025 Q3	$864K	Sell	22,086 -5,921	-21%	-$176K	﹤0.01%	2018
2025 Q2	$725K	Sell	28,007 -21,011	-43%	-$472K	﹤0.01%	2054
2025 Q1	$1.14M	Buy	+49,018	New	+$1.12M	﹤0.01%	1857
2024 Q3	–	Sell	-21,736	Closed	-$501K	–	2677
2024 Q2	$501K	Buy	21,736 +1,358	+7%	+$34.4K	﹤0.01%	2148
2024 Q1	$593K	Sell	20,378 -766	-4%	-$17.5K	﹤0.01%	2057
2023 Q4	$413K	Sell	21,144 -64,457	-75%	-$1.13M	﹤0.01%	2187
2023 Q3	$1.55M	Buy	85,601 +47,536	+125%	+$707K	﹤0.01%	1705
2023 Q2	$498K	Hold	38,065	–	–	﹤0.01%	2133
2023 Q1	$445K	Sell	38,065 -10,646	-22%	-$123K	﹤0.01%	2176
2022 Q4	$376K	Buy	48,711 +22,300	+84%	+$189K	﹤0.01%	2128
2022 Q3	$329K	Buy	+26,411	New	+$429K	﹤0.01%	2268
2020 Q3	–	Sell	-22,542	Closed	-$469K	–	2394
2020 Q2	$469K	Sell	22,542 -19,080	-46%	-$313K	﹤0.01%	1880
2020 Q1	$411K	Buy	+41,622	New	+$449K	﹤0.01%	1802

Other funds holding ACMR

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

WCM Investment Management Laguna Beach, California $43.8B AUM 42.28% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

Janus Henderson Group London, United Kingdom $209B AUM 37.72% 1-Year Est. Return

VARA

Value Aligned Research Advisors Princeton, New Jersey $20.7B AUM 292.88% 1-Year Est. Return

PCP

Polunin Capital Partners London, United Kingdom $407M AUM 55.12% 1-Year Est. Return

SEI Investments's ACMR Position: Q1 2026 in Review

SEI Investments increased its ACM Research (ACMR) stake by 45% in Q1 2026, buying an estimated $1.41M and bringing the position to 85,005 shares worth $3.34M. The position accounts for ﹤0.01% of the portfolio, ranked #1758.

SEI Investments first reported a position in ACMR in Q1 2020 and has held it in 15 quarters since. 300 funds tracked by Wall St. Rank hold ACMR as of Q1 2026.

SEI Investments held 85,005 shares of ACM Research worth $3.34M as of Q1 2026.
SEI Investments bought 26,560 ACM Research shares in Q1 2026, an estimated $1.41M.
ACM Research made up ﹤0.01% of SEI Investments's portfolio in Q1 2026, its #1758 holding.
SEI Investments first reported a position in ACM Research in Q1 2020 and has held it in 15 quarters since.
300 funds tracked by Wall St. Rank held ACM Research as of Q1 2026.

Based on SEI Investments's 13F filing for Q1 2026, filed 13 May 2026.