Two Sigma Investments’s ACM Research ACMR Stock Holding History

Two Sigma 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 Q2	$27M	Buy	212,544 +160,128	+305%	+$11.3M	0.02%	870
2026 Q1	$2.06M	Buy	+52,416	New	+$2.78M	﹤0.01%	2737
2025 Q4	–	Sell	-194,338	Closed	-$7.6M	–	4045
2025 Q3	$7.6M	Buy	+194,338	New	+$5.77M	0.01%	1133
2024 Q4	–	Sell	-44,519	Closed	-$904K	–	3167
2024 Q3	$904K	Sell	44,519 -5,166	-10%	-$99K	﹤0.01%	2184
2024 Q2	$1.15M	Sell	49,685 -388,880	-89%	-$9.84M	﹤0.01%	1910
2024 Q1	$12.8M	Buy	438,565 +355,265	+426%	+$8.13M	0.03%	569
2023 Q4	$1.63M	Buy	83,300 +28,700	+53%	+$502K	﹤0.01%	1757
2023 Q3	$989K	Sell	54,600 -147,488	-73%	-$2.19M	﹤0.01%	1937
2023 Q2	$2.64M	Sell	202,088 -86,727	-30%	-$914K	0.01%	1259
2023 Q1	$3.38M	Buy	+288,815	New	+$3.34M	0.01%	1091
2020 Q4	–	Sell	-293,844	Closed	-$7.52M	–	3286
2020 Q3	$6.77M	Buy	293,844 +111,408	+61%	+$3.16M	0.02%	665
2020 Q2	$3.79M	Buy	+182,436	New	+$2.99M	0.02%	776
2020 Q1	–	Sell	-69,198	Closed	-$426K	–	3000
2019 Q4	$426K	Sell	69,198 -52,647	-43%	-$259K	﹤0.01%	2914
2019 Q3	$563K	Buy	121,845 +53,646	+79%	+$282K	﹤0.01%	2466
2019 Q2	$355K	Buy	+68,199	New	+$395K	﹤0.01%	2758

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

Two Sigma Investments's ACMR Position: Q2 2026 in Review

Two Sigma Investments increased its ACM Research (ACMR) stake by 305% in Q2 2026, buying an estimated $11.3M and bringing the position to 212,544 shares worth $27M. The position accounts for 0.02% of the portfolio, ranked #870.

Two Sigma Investments first reported a position in ACMR in Q2 2019 and has held it in 15 quarters since. 373 funds tracked by Wall St. Rank hold ACMR as of Q2 2026.

Two Sigma Investments held 212,544 shares of ACM Research worth $27M as of Q2 2026.
Two Sigma Investments bought 160,128 ACM Research shares in Q2 2026, an estimated $11.3M.
ACM Research made up 0.02% of Two Sigma Investments's portfolio in Q2 2026, its #870 holding.
Two Sigma Investments first reported a position in ACM Research in Q2 2019 and has held it in 15 quarters since.
373 funds tracked by Wall St. Rank held ACM Research as of Q2 2026.

Based on Two Sigma Investments's 13F filing for Q2 2026, filed 14 Aug 2026.