ACM Research ACMR Institutional Ownership

NASDAQ ACMR

$76.17 -7.21 (-8.65%)

At close: Oct 5, 2026 · 4:00 PM EDT

Institutions by Trading Activity

377 Institutions

Increased 246 65.3%

Unchanged 39 10.3%

Reduced 92 24.4%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

75.79%

▲+3.28 pp QoQ

Shares Held by Institutions

49.00Mn

of 64.65Mn outstanding

▲+17.10% QoQ

Shares Outstanding

64.65Mn

15.65Mn held outside 13F filers

Institutional Investors

377

filed 13F for Jun 2026

▲+77 vs prior quarter

Net Shares Added (QoQ)

+7.16Mn

accumulated since last quarter

Value of Holdings

$4.09Bn

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

Updated Oct 5, 2026

ACM Research, Inc. (NASDAQ:ACMR) had 377 institutional holders reporting a position on Form 13F for the quarter ended June 30, 2026.

Collectively, these holders controlled 75.79% of ACM Research's outstanding shares in Q2 2026, up from 72.51% in Q1 2026.
Total shares held in ACMR rose 10.36% from Q1 2026; the number of holders rose 55.79% from Q2 2025.
Of the 377 holders of ACMR in Q2 2026, 246 added to their positions, 92 reduced their stakes and 39 left their positions unchanged.
Institutional investors held 49Mn shares of ACM Research in total at the end of Q2 2026, up 4.6Mn from the prior quarter and up 12.33Mn from a year earlier.
As of June 30, 2026, the biggest holder of ACM Research was BlackRock, Inc. with 8.66Mn shares, or 13.40% of shares outstanding.
Among existing holders, the largest additions to ACM Research in Q2 2026 came from Vanguard Portfolio Management LLC (+1.15Mn shares), BlackRock, Inc. (+676K shares), Gilder Gagnon Howe & Co LLC (+565.81K shares), Citadel Advisors LLC (+433.46K shares) and Invesco Ltd. (+382.98K shares).
Among holders that kept a stake in ACM Research, the biggest sellers in Q2 2026 were WCM Investment Management, LLC (-943.22K shares), Longaeva Partners L.P. (-690.65K shares), Southeastern Asset Management Inc (-643.42K shares), LSV Asset Management (-533.21K shares) and Morgan Stanley (-492.52K shares).
Business Quant data shows the 10 biggest positions in ACM Research as of Q2 2026 were held by BlackRock, Inc. (8.66Mn shares), Vanguard Portfolio Management LLC (3.35Mn shares), Vanguard Capital Management LLC (2.46Mn shares), Capital World Investors (2.4Mn shares), State Street Corp (2.19Mn shares), Geode Capital Management, LLC (1.49Mn shares), Invesco Ltd. (1.17Mn shares), Value Aligned Research Advisors, LLC (1.05Mn shares), WFM ASIA (BVI) Ltd (969.2K shares) and Dimensional Fund Advisors LP (954.47K shares).

Form 13F Holdings

377 Institutional Holders

Report period 30 Jun, 2026

Total shares held 49.00Mn

Of outstanding 75.79%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	BlackRock, Inc.	0002012383	8,660,842	13.40%	▲675,995	+8.47%	$1.10Bn
2	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	3,349,436	5.18%	▲1,145,605	+51.98%	$425.01Mn
3	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	2,462,745	3.81%	▲198,408	+8.76%	$312.50Mn
4	Capital World Investors	0001422849	2,398,036	3.71%	▲2,398,036	0.00%	$304.29Mn
5	State Street Corp	0000093751	2,188,254	3.38%	▲182,138	+9.08%	$277.67Mn
6	GEODE CAPITAL MANAGEMENT, LLC	0001214717	1,487,797	2.30%	▲116,570	+8.50%	$188.82Mn
7	Invesco Ltd.	0000914208	1,170,080	1.81%	▲382,979	+48.66%	$148.47Mn
8	Value Aligned Research Advisors, LLC	0001963565	1,053,949	1.63%	▲98,022	+10.25%	$133.74Mn
9	WFM ASIA (BVI) Ltd	0001632574	969,200	1.50%	▲969,200	0.00%	$122.98K
10	DIMENSIONAL FUND ADVISORS LP	0000354204	954,474	1.48%	▲235,451	+32.75%	$121.07Mn
11	WCM INVESTMENT MANAGEMENT, LLC	0001061186	917,651	1.42%	▼943,223	-50.69%	$109.09Mn
12	Polunin Capital Partners Ltd	0001629869	748,498	1.16%	▼14,820	-1.94%	$77.10K
13	Tekne Capital Management, LLC	0001558971	737,500	1.14%	▲22,500	+3.15%	$93.58Mn
14	Morgan Stanley	0000895421	700,185	1.08%	▼492,520	-41.29%	$88.85Mn
15	FMR LLC	0000315066	672,184	1.04%	▲42,940	+6.82%	$85.29Mn
16	FULLER & THALER ASSET MANAGEMENT, INC.	0001082327	639,448	0.99%	▲639,448	0.00%	$81.14Mn
17	GILDER GAGNON HOWE & CO LLC	0000902464	637,058	0.99%	▲565,813	+794.18%	$80.84Mn
18	CITADEL ADVISORS LLC	0001423053	636,836	0.99%	▲433,458	+213.13%	$80.81Mn
19	Capital International Investors	0001562230	623,429	0.96%	▲623,429	0.00%	$79.11Mn
20	PRICE T ROWE ASSOCIATES INC /MD/	0000080255	591,573	0.92%	▲374,618	+172.67%	$75.07K

Showing 1 to 20 of 377 holders