Cornerstone Investment Partners’s ACM Research ACMR Stock Holding History

Cornerstone Investment Partners’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	$251K	Buy	+6,391	New	+$339K	0.01%	216
2025 Q4	–	Sell	-10,170	Closed	-$398K	–	220
2025 Q3	$398K	Sell	10,170 -756	-7%	-$22.4K	0.02%	79
2025 Q2	$283K	Buy	10,926 +4	+0%	+$90	0.01%	113
2025 Q1	$255K	Sell	10,922 -956	-8%	-$21.8K	0.01%	104
2024 Q4	$179K	Sell	11,878 -23	-0.2%	-$416	0.01%	226
2024 Q3	$242K	Buy	11,901 +398	+3%	+$7.63K	0.01%	149
2024 Q2	$265K	Sell	11,503 -940	-8%	-$23.8K	0.01%	128
2024 Q1	$363K	Sell	12,443 -154	-1%	-$3.52K	0.02%	109
2023 Q4	$246K	Hold	12,597	–	–	0.01%	145
2023 Q3	$228K	Sell	12,597 -909	-7%	-$13.5K	0.01%	131
2023 Q2	$177K	Hold	13,506	–	–	0.01%	173
2023 Q1	$158K	Buy	+13,506	New	+$156K	0.01%	181

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

Cornerstone Investment Partners's ACMR Position: Q1 2026 in Review

Cornerstone Investment Partners opened a new position in ACM Research (ACMR) in Q1 2026: 6,391 shares worth $251K. The stake represents 0.01% of the portfolio and ranks #216 among its holdings. This is a return to the name: Cornerstone Investment Partners previously reported a position in ACMR as recently as Q3 2025.

Cornerstone Investment Partners first reported a position in ACMR in Q1 2023 and has held it in 12 quarters since. The position peaked at $398K in Q3 2025. 300 funds tracked by Wall St. Rank hold ACMR as of Q1 2026.

Cornerstone Investment Partners held 6,391 shares of ACM Research worth $251K as of Q1 2026.
ACM Research was a new Cornerstone Investment Partners position in Q1 2026.
ACM Research made up 0.01% of Cornerstone Investment Partners's portfolio in Q1 2026, its #216 holding.
Cornerstone Investment Partners first reported a position in ACM Research in Q1 2023 and has held it in 12 quarters since.
Cornerstone Investment Partners's ACM Research position peaked at $398K in Q3 2025.
300 funds tracked by Wall St. Rank held ACM Research as of Q1 2026.

Based on Cornerstone Investment Partners's 13F filing for Q1 2026, filed 8 May 2026.