State of Wisconsin Investment Board’s ACM Research ACMR Stock Holding History

State of Wisconsin Investment Board’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	$1.37M	Buy	34,700 +22,543	+185%	+$1.2M	﹤0.01%	1549
2025 Q4	$480K	Sell	12,157 -15,468	-56%	-$576K	﹤0.01%	1963
2025 Q3	$1.08M	Buy	27,625 +6,334	+30%	+$188K	﹤0.01%	1589
2025 Q2	$551K	Sell	21,291 -355	-2%	-$7.98K	﹤0.01%	1813
2025 Q1	$505K	Sell	21,646 -2,237	-9%	-$51.1K	﹤0.01%	1755
2024 Q4	$361K	Sell	23,883 -37,561	-61%	-$679K	﹤0.01%	1941
2024 Q3	$1.25M	Sell	61,444 -22,000	-26%	-$422K	﹤0.01%	1486
2024 Q2	$1.92M	Sell	83,444 -54,144	-39%	-$1.37M	0.01%	1305
2024 Q1	$4.01M	Buy	+137,588	New	+$3.15M	0.01%	1025
2023 Q2	–	Sell	-15,378	Closed	-$180K	–	2336
2023 Q1	$180K	Buy	+15,378	New	+$178K	﹤0.01%	2290
2022 Q3	–	Sell	-10,311	Closed	-$174K	–	2682
2022 Q2	$174K	Buy	+10,311	New	+$159K	﹤0.01%	2535

Other funds holding ACMR

BlackRock New York $6.73T AUM 46.02% 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 $3.37T AUM 44.26% 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

State of Wisconsin Investment Board's ACMR Position: Q1 2026 in Review

State of Wisconsin Investment Board increased its ACM Research (ACMR) stake by 185% in Q1 2026, buying an estimated $1.2M and bringing the position to 34,700 shares worth $1.37M. The position accounts for ﹤0.01% of the portfolio, ranked #1549.

State of Wisconsin Investment Board first reported a position in ACMR in Q2 2022 and has held it in 11 quarters since. The position peaked at $4.01M in Q1 2024. 300 funds tracked by Wall St. Rank hold ACMR as of Q1 2026.

State of Wisconsin Investment Board held 34,700 shares of ACM Research worth $1.37M as of Q1 2026.
State of Wisconsin Investment Board bought 22,543 ACM Research shares in Q1 2026, an estimated $1.2M.
ACM Research made up ﹤0.01% of State of Wisconsin Investment Board's portfolio in Q1 2026, its #1549 holding.
State of Wisconsin Investment Board first reported a position in ACM Research in Q2 2022 and has held it in 11 quarters since.
State of Wisconsin Investment Board's ACM Research position peaked at $4.01M in Q1 2024.
300 funds tracked by Wall St. Rank held ACM Research as of Q1 2026.

Based on State of Wisconsin Investment Board's 13F filing for Q1 2026, filed 15 May 2026.