ACM Research
ACMR · NASDAQ
$54.96−$1.13 (−2.01%)TodayMarket closed ·
Prev close $56.09
Who owns ACMR
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 34.9% of ACMR’s shares.
- BlackRock Institutional Trust Company, N.A.11.5%
- Vanguard Portfolio Management, LLC4.8%
- Vanguard Capital Management, LLC3.6%
- Capital World Investors3.5%
- Next 6 largest institutions11.6%
- All other shareholders65.1%
| Holder | Shares | % of shares |
|---|---|---|
| BlackRock Institutional Trust Company, N.A. | 7.91M | 11.45% |
| Vanguard Portfolio Management, LLC | 3.35M | 4.85% |
| Vanguard Capital Management, LLC | 2.46M | 3.56% |
| Capital World Investors | 2.40M | 3.47% |
| State Street Investment Management (US) | 2.19M | 3.17% |
| Geode Capital Management, L.L.C. | 1.49M | 2.15% |
| Wang (David Hui) | 1.23M | 1.78% |
| Invesco Capital Management LLC | 1.09M | 1.58% |
| Value Aligned Research Advisors, LLC | 1.05M | 1.53% |
| WFM Asia (HK) Limited | 969.20K | 1.40% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| iShares Core S&P Small-Cap ETF | 3.48M | 5.03% |
| American Funds SMALLCAP World Fund | 2.93M | 4.24% |
| Vanguard Total Stock Market Index Fund | 1.76M | 2.54% |
| iShares Russell 2000 ETF | 1.39M | 2.01% |
| Vanguard Information Technology Index Fund | 1.33M | 1.93% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $26.05M (37 trades) of ACMR on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Wang David H | Option exercise | 70.00K | — |
| Wang David H | Sale | 1.10K | $85.35K |
| Wang David H | Sale | 4.81K | $368.84K |
| Wang David H | Sale | 11.67K | $881.72K |
| Wang David H | Sale | 18.93K | $1.41M |
| Wang David H | Sale | 33.49K | $2.47M |
| Wang David H | Option exercise | 70.00K | $70.00K |
| Wang David H | Option exercise | 70.00K | — |
| Wang David H | Sale | 1.50K | $117.85K |
| Wang David H | Sale | 12.32K | $962.18K |
Short interest
Settled Sep 30, 2026
- Shares short
- 4.06M
- Days to cover
- 3.16
- % of shares outstanding
- 5.87%
- Average daily volume
- 1.29M
- Change since last report
- −2.0%
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