EAM Investors’s ACM Research ACMR Stock Holding History

EAM Investors’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 Q2	$4.04M	Sell	31,875 -11,999	-27%	-$848K	0.36%	132
2026 Q1	$1.73M	Buy	+43,874	New	+$2.33M	0.2%	175
2025 Q2	–	Sell	-85,967	Closed	-$2.01M	–	222
2025 Q1	$2.01M	Buy	+85,967	New	+$1.96M	0.35%	133
2023 Q4	–	Sell	-147,188	Closed	-$2.66M	–	236
2023 Q3	$2.66M	Buy	+147,188	New	+$2.19M	0.51%	53
2020 Q3	–	Sell	-175,146	Closed	-$3.64M	–	266
2020 Q2	$3.64M	Sell	175,146 -98,802	-36%	-$1.62M	0.8%	14
2020 Q1	$2.7M	Buy	273,948 +110,016	+67%	+$1.19M	0.84%	19
2019 Q4	$1.01M	Sell	163,932 -148,569	-48%	-$731K	0.22%	201
2019 Q3	$1.44M	Sell	312,501 -22,227	-7%	-$117K	0.38%	128
2019 Q2	$1.74M	Buy	334,728 +187,347	+127%	+$1.09M	0.43%	85
2019 Q1	$758K	Buy	+147,381	New	+$561K	0.19%	211
2018 Q3	–	Sell	-205,926	Closed	-$740K	–	298
2018 Q2	$740K	Hold	205,926	–	–	0.12%	248
2018 Q1	$844K	Buy	+205,926	New	+$551K	0.14%	220

Other funds holding ACMR

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Capital World Investors Los Angeles, California $846B AUM 46.74% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return

VARA

Value Aligned Research Advisors Princeton, New Jersey $40.1B AUM 376.19% 1-Year Est. Return

WFM Asia Road Town, Tortola, British Virgin Islands $663M AUM 15.46% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

EAM Investors's ACMR Position: Q2 2026 in Review

EAM Investors reduced its ACM Research (ACMR) stake by 27% in Q2 2026, selling an estimated $848K and leaving 31,875 shares worth $4.04M. The position accounts for 0.36% of the portfolio, ranked #132.

EAM Investors first reported a position in ACMR in Q1 2018 and has held it in 12 quarters since. 376 funds tracked by Wall St. Rank hold ACMR as of Q2 2026.

EAM Investors held 31,875 shares of ACM Research worth $4.04M as of Q2 2026.
EAM Investors sold 11,999 ACM Research shares in Q2 2026, an estimated $848K.
ACM Research made up 0.36% of EAM Investors's portfolio in Q2 2026, its #132 holding.
EAM Investors first reported a position in ACM Research in Q1 2018 and has held it in 12 quarters since.
376 funds tracked by Wall St. Rank held ACM Research as of Q2 2026.

Based on EAM Investors's 13F filing for Q2 2026, filed 13 Aug 2026.