ACM Research ACMR Institutional Ownership

NASDAQ ACMR

$79.41 +0.89 (+1.13%)

At close: Aug 21, 2026 · 4:00 PM EDT

Institutions by Trading Activity

298 Institutions

Increased 154 51.7%

Unchanged 38 12.8%

Reduced 106 35.6%

Ownership Statistics

13F · as of 31 Mar, 2026

Institutional Ownership

69.12%

▼-2.73 pp QoQ

Shares Held by Institutions

45.48Mn

of 65.80Mn outstanding

▲+23.17% QoQ

Shares Outstanding

65.80Mn

20.32Mn held outside 13F filers

Institutional Investors

298

filed 13F for Mar 2026

▲+28 vs prior quarter

Net Shares Added (QoQ)

+8.56Mn

accumulated since last quarter

Value of Holdings

$3.84Bn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 31 Mar, 2026

ACM Research, Inc. (NASDAQ:ACMR) showed up in the 13F filings of 298 institutional investors as of March 2026.

These investors held 69.1% of outstanding shares in March 2026, down from 71.9% in December 2025.
They increased total shares held in ACMR by 23.17% quarter over quarter, and investors in ACM Research increased 22.13% from a year ago.
Of these 298 funds, 154 grew their exposure to ACM Research, 106 cut back, and 38 maintained positions.
Institutional investors collectively held 45.48Mn shares in ACM Research as of March 2026, up by 8.56Mn shares quarter on quarter, and up 6.14Mn shares year over year.
BlackRock, Inc. leads ownership in ACMR with 7.98Mn shares as of March 31, 2026, equal to 12.13% of outstanding shares.
Top purchasers of ACMR stock for the quarter ending March 2026 included VANGUARD CAPITAL MANAGEMENT LLC (2.26Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (2.2Mn), WCM INVESTMENT MANAGEMENT, LLC (1.85Mn), Janus Henderson Group Plc (1.09Mn), Value Aligned Research Advisors, LLC (955.93K).
The largest sales of ACMR for the quarter ending March 2026 came from LSV ASSET MANAGEMENT (1.84Mn), SOUTHEASTERN ASSET MANAGEMENT INC/TN/ (897.28K), Cederberg Capital Ltd (591.2K), Invesco Ltd. (555.04K), Mitsubishi UFJ Trust & Banking Corp (363.37K).
Per Business Quant, the top 10 investors in ACMR for the quarter ending March 2026 include BlackRock, Inc. (7.98Mn), VANGUARD CAPITAL MANAGEMENT LLC (2.26Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (2.2Mn), Janus Henderson Group Plc (2.17Mn), State Street Corp (2.01Mn), WCM INVESTMENT MANAGEMENT, LLC (1.86Mn), GEODE CAPITAL MANAGEMENT, LLC (1.37Mn), Morgan Stanley (1.19Mn), Value Aligned Research Advisors, LLC (955.93K), Invesco Ltd. (787.1K).

Form 13F Holdings

298 Institutional Holders

Report period 31 Mar, 2026

Total shares held 45.48Mn

Of outstanding 69.12%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	BlackRock, Inc.	0002012383	7,984,847	12.13%	▲96,367	+1.22%	$314.20Mn
2	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	2,264,337	3.44%	▲2,264,337	0.00%	$89.10Mn
3	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	2,203,831	3.35%	▲2,203,831	0.00%	$86.72Mn
4	Janus Henderson Group Plc	0001274173	2,171,268	3.30%	▲1,088,286	+100.49%	$85.40Mn
5	State Street Corp	0000093751	2,006,116	3.05%	▲48,075	+2.46%	$78.94Mn
6	WCM INVESTMENT MANAGEMENT, LLC	0001061186	1,860,874	2.83%	▲1,849,914	+16,878.78%	$70.58Mn
7	GEODE CAPITAL MANAGEMENT, LLC	0001214717	1,371,227	2.08%	▲28,328	+2.11%	$53.97Mn
8	Morgan Stanley	0000895421	1,192,705	1.81%	▼199,601	-14.34%	$46.93Mn
9	Value Aligned Research Advisors, LLC	0001963565	955,927	1.45%	▲955,927	0.00%	$37.62Mn
10	Invesco Ltd.	0000914208	787,101	1.20%	▼555,035	-41.35%	$30.97Mn
11	SOUTHEASTERN ASSET MANAGEMENT INC/TN/	0000807985	782,900	1.19%	▼897,281	-53.40%	$30.81Mn
12	Polunin Capital Partners Ltd	0001629869	763,318	1.16%	▲763,318	0.00%	$31.81K
13	Qube Research & Technologies Ltd	0001729829	724,405	1.10%	▲578,346	+395.97%	$28.51Mn
14	DIMENSIONAL FUND ADVISORS LP	0000354204	719,023	1.09%	▲485,282	+207.62%	$28.29Mn
15	Tekne Capital Management, LLC	0001558971	715,000	1.09%	0	0.00%	$28.14Mn
16	Longaeva Partners L.P.	0002054122	708,379	1.08%	▲708,379	0.00%	$27.87Mn
17	FMR LLC	0000315066	629,244	0.96%	▼174,422	-21.70%	$24.76Mn
18	Citigroup Inc	0000831001	619,892	0.94%	▲576,140	+1,316.83%	$24.39Mn
19	WEXFORD CAPITAL LP	0001048462	599,246	0.91%	▲264,243	+78.88%	$23.58Mn
20	Cederberg Capital Ltd	0001861244	599,200	0.91%	▼591,200	-49.66%	$23.58K

Showing 1 to 20 of 298 holders