Jim Simons’s ACM Research ACMR Stock Holding History

Jim Simons’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	$4.82M	Sell	122,600 -1,839	-1%	-$97.6K	0.01%	1406
2025 Q4	$4.91M	Sell	124,439 -175,486	-59%	-$6.54M	0.01%	1313
2025 Q3	$11.7M	Buy	299,925 +262,925	+711%	+$7.81M	0.02%	1014
2025 Q2	$958K	Buy	+37,000	New	+$832K	﹤0.01%	2544
2024 Q2	–	Sell	-145,800	Closed	-$4.25M	–	3447
2024 Q1	$4.25M	Buy	+145,800	New	+$3.34M	0.01%	1519
2023 Q1	–	Sell	-111,600	Closed	-$860K	–	3926
2022 Q4	$860K	Buy	+111,600	New	+$946K	﹤0.01%	2620
2022 Q2	–	Sell	-95,800	Closed	-$1.98M	–	4180
2022 Q1	$1.98M	Sell	95,800 -157,100	-62%	-$3.95M	﹤0.01%	2239
2021 Q4	$7.19M	Buy	+252,900	New	+$8M	0.01%	1268
2019 Q4	–	Sell	-148,800	Closed	-$687K	–	3474
2019 Q3	$687K	Sell	148,800 -2,400	-2%	-$12.6K	﹤0.01%	2740
2019 Q2	$787K	Buy	+151,200	New	+$876K	﹤0.01%	2802

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 $1.88T AUM 44.46% 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

Jim Simons's ACMR Position: Q1 2026 in Review

Jim Simons reduced its ACM Research (ACMR) stake by 1.5% in Q1 2026, selling an estimated $97.6K and leaving 122,600 shares worth $4.82M. The position accounts for 0.01% of the portfolio, ranked #1406.

Jim Simons first reported a position in ACMR in Q2 2019 and has held it in 10 quarters since. The position peaked at $11.7M in Q3 2025. 300 funds tracked by Wall St. Rank hold ACMR as of Q1 2026.

Jim Simons held 122,600 shares of ACM Research worth $4.82M as of Q1 2026.
Jim Simons sold 1,839 ACM Research shares in Q1 2026, an estimated $97.6K.
ACM Research made up 0.01% of Jim Simons's portfolio in Q1 2026, its #1406 holding.
Jim Simons first reported a position in ACM Research in Q2 2019 and has held it in 10 quarters since.
Jim Simons's ACM Research position peaked at $11.7M in Q3 2025.
300 funds tracked by Wall St. Rank held ACM Research as of Q1 2026.

Based on Renaissance Technologies's 13F filing for Q1 2026, filed 14 May 2026.