ACM Research (ACMR)
Supplies wet-cleaning and adjacent process equipment for wafer fabrication and advanced packaging.
$72.97
vs last close−2.83 (−3.73%)
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13F · 13D/G · Form 4
| Institutions | 70.36% | 49.00M shares | |
|---|---|---|---|
| 403 holders · as of Jun 30, 2026 | |||
| Insiders | 2.39% | 1.67M shares | |
| 7 holders · as of Sep 10, 2026 | |||
| Strategic holders | 9.87% | 6.88M shares | |
| 2 holders · as of Jun 13, 2023 | |||
| Other | 17.38% | 12.10M shares | |
| remainder | |||
69.65M company shares as of Sep 23, 2026 · institutions as of Jun 30, 2026 · holders as of their latest filing
Two share counts disagree (69.65M in the company's Sep 23, 2026 report, 64.12M elsewhere); stakes use the report.
This company has 2 share classes; every stake here is a share of the whole company.
13F, as of Jun 30, 2026
403 holders · 49.00M shares · 123 new positions · 248 increased · 97 reduced · 46 closed
| Holder | Shares | % of company | Chg q/q | Filed |
|---|---|---|---|---|
| BlackRock, Inc. | 8.66M | 12.43% | +676.0K | Aug 7, 2026 |
| Vanguard Portfolio Management LLC | 3.35M | 4.81% | +1.15M | Aug 13, 2026 |
| Vanguard Capital Management LLC | 2.46M | 3.54% | +198.4K | Aug 13, 2026 |
| Capital World Investors | 2.40M | 3.44% | +2.40Mnew | Aug 12, 2026 |
| State Street Corp | 2.19M | 3.14% | +182.1K | Aug 7, 2026 |
| Geode Capital Management, LLC | 1.49M | 2.14% | +116.6K | Aug 12, 2026 |
| Invesco Ltd. | 1.17M | 1.68% | +383.0K | Aug 14, 2026 |
| Value Aligned Research Advisors, LLC | 1.05M | 1.51% | +98.0K | Aug 17, 2026 |
13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| BlackRock, Inc. | 12.60% | 7.42M | 13G | Oct 2, 2025 |
| Vanguard Portfolio Management | 5.31% | 3.41M | 13G | Jul 31, 2026 |
Form 4
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| Sep 9, 2026 | David H. Wangdirector, 10 percent owner, officer: See Remarks | Sale · 5 lots | 70,000 | $74.59 | 802,708 |
| Sep 8, 2026 | David H. Wangdirector, 10 percent owner, officer: See Remarks | Sale · 4 lots | 70,000 | $77.26 | 802,708 |
| Aug 20, 2026 | Mark McKechnieofficer: See Remarks | Sale · 3 lots | 55,199 | $77.27 | 900 |
| Aug 18, 2026 | Haiping Dundirector | Sale · 3 lots | 5,000 | $81.13 | 0 |
| Jun 4, 2026 | David H. Wangdirector, 10 percent owner, officer: See Remarks | Sale · 5 lots | 40,002 | $85.80 | 802,708 |
| Jun 3, 2026 | David H. Wangdirector, 10 percent owner, officer: See Remarks | Sale · 6 lots | 60,000 | $90.05 | 802,708 |
| Jun 5, 2026 | Sotheara Cheavofficer: See remarks | Sale · 4 lots | 5,399 | $83.18 | 100,002 |
| Jun 4, 2026 | Sotheara Cheavofficer: See remarks | Sale · 3 lots | 13,351 | $85.15 | 100,002 |
| May 19, 2026 | Haiping Dundirector | Sale · 4 lots | 5,000 | $66.22 | 0 |
| Apr 17, 2026 | Charles C. Pappisdirector | Sale | 5,000 | $52.00 | 0 |
House and Senate disclosures
Not reported.