ACM Research (ACMR) stock: insider trades, news & valuation
Heavy selling
Close · Oct 9, 2026
$71.37
+0.8% on the day
+73.8% over 12 months
52-week range $29.67 – $126.89
Share price and insider trades
ACMR closeInsider buyInsider sale
Bought, 12 months$0
Sold, 12 months$51.2M
Insiders buying0
Insiders selling8
ACM Research insider trading at a glance (Oct 9, 2026): in the past 12 months, 0 insiders bought $0 and 8 sold $51.2M of ACMR stock on the open market.
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ACMR insider buying and selling by quarter
Open-market purchases (green, above the line) and sales (red, below), by trade date.
| Quarter | Bought | Purchases | Sold | Sales |
|---|---|---|---|---|
| Q4 2026 | — | 0 | — | 0 |
| Q3 2026 | — | 0 | $15.3M | 15 |
| Q2 2026 | — | 0 | $11.0M | 23 |
| Q1 2026 | — | 0 | $14.4M | 22 |
| Q4 2025 | — | 0 | $10.4M | 12 |
Valuation, profit and volume
P/E (trailing)n/aSector median —
Market value—
Profit margin—Revenue growth —
Volume vs. 50-day1.4×Last 5 sessions
Insiders' paper profit—On all tracked purchases —
Summary
Over the past 12 months, 0 ACM Research, Inc. insiders reported open-market purchases totaling $0, while 8 insiders reported sales totaling $51.2M. 72 of 72 recorded sales were made under pre-scheduled Rule 10b5-1 trading plans, which are usually less informative than discretionary sales.
ACMR earnings: how the stock reacted
Each quarterly results release (SEC 8-K Item 2.02), the trend before it, insider trades in the 30 days before, and the 2-day market reaction. “E” marks releases on the chart above.
| Release | 15 days before | Insiders, 30 days before | Reaction (2 days) | Next 30 days |
|---|---|---|---|---|
| Aug 7, 2026 | -11.8% | None | +0.5%S&P +0.6% | -7.0% |
| May 7, 2026 | +8.1% | Sold $260K | +8.1%S&P +0.5% | +27.5% |
| Apr 27, 2026 | +19.4% | Sold $260K | -11.7%S&P -0.3% | +87.5% |
| Feb 26, 2026 | +8.8% | None | -18.7%S&P -1.0% | -28.0% |
| Jan 22, 2026 | +14.0% | None | -6.7%S&P +0.6% | +33.6% |
| Nov 5, 2025 | -2.2% | None | -20.5%S&P -0.7% | +13.5% |
| Oct 29, 2025 | +4.8% | None | +1.9%S&P -1.1% | -18.9% |
| Aug 6, 2025 | -2.5% | None | -18.1%S&P +0.7% | +12.9% |
Most companies bar insiders from trading in the weeks before results, so pre-earnings purchases are rare and often made by directors or under pre-set plans. Past reactions don't predict future ones.
Insider transactions
Open-market purchases and sales.
| Filed | Insider | Type | Shares | Price | Value | Since | Score |
|---|---|---|---|---|---|---|---|
| Sep 10SEC | David H WangSee Remarks | Sell Plan | 51,374816,531 held (−6%) | $77.15 | $4.0M | -7.5% | — |
| Sep 10SEC | David H WangSee Remarks | Sell Plan | 33,493839,215 held (−4%) | $73.80 | $2.5M | -3.3% | — |
| Sep 10SEC | David H WangSee Remarks | Sell Plan | 18,934820,281 held (−2%) | $74.67 | $1.4M | -4.4% | — |
| Sep 10SEC | David H WangSee Remarks | Sell Plan | 12,323804,208 held (−2%) | $78.08 | $962K | -8.6% | — |
| Sep 10SEC | David H WangSee Remarks | Sell Plan | 11,666808,615 held (−1%) | $75.58 | $882K | -5.6% | — |
| Sep 10SEC | David H WangSee Remarks | Sell Plan | 4,807803,808 held (−1%) | $76.73 | $369K | -7.0% | — |
| Sep 10SEC | David H WangSee Remarks | Sell Plan | 4,803867,905 held (−1%) | $75.99 | $365K | -6.1% | — |
| Sep 10SEC | David H WangSee Remarks | Sell Plan | 1,500802,708 held (−0%) | $78.57 | $118K | -9.2% | — |
| Sep 10SEC | David H WangSee Remarks | Sell Plan | 1,100802,708 held (−0%) | $77.59 | $85K | -8.0% | — |
| Aug 21SEC | Mark MckechnieSee Remarks | Sell Plan | 30,36512,109 held (−71%) | $77.45 | $2.4M | -7.9% | — |
| Aug 21SEC | Mark MckechnieSee Remarks | Sell Plan | 13,62542,474 held (−24%) | $76.34 | $1.0M | -6.5% | — |
| Aug 21SEC | Mark MckechnieSee Remarks | Sell Plan | 11,209900 held (−93%) | $77.89 | $873K | -8.4% | — |
| Aug 20SEC | Haiping DunDirector | Sell Plan | 3,400400 held (−89%) | $81.31 | $276K | -12.2% | — |
| Aug 20SEC | Haiping DunDirector | Sell Plan | 1,2003,800 held (−24%) | $80.29 | $96K | -11.1% | — |
| Aug 20SEC | Haiping DunDirector | Sell Plan | 400 | $82.17 | $33K | -13.1% | — |
| Jun 5SEC | David H WangSee Remarks | Sell Plan | 32,450819,663 held (−4%) | $89.84 | $2.9M | -20.6% | — |
| Jun 5SEC | David H WangSee Remarks | Sell Plan | 17,543823,107 held (−2%) | $85.11 | $1.5M | -16.1% | — |
| Jun 5SEC | David H WangSee Remarks | Sell Plan | 10,992812,115 held (−1%) | $86.07 | $946K | -17.1% | — |
| Jun 5SEC | David H WangSee Remarks | Sell Plan | 9,925809,738 held (−1%) | $90.78 | $901K | -21.4% | — |
| Jun 5SEC | Sotheara CheavSee Remarks | Sell Plan | 9,212102,841 held (−8%) | $85.11 | $784K | -16.1% | — |
| Jun 5SEC | David H WangSee Remarks | Sell Plan | 8,581803,534 held (−1%) | $87.13 | $748K | -18.1% | — |
| Jun 5SEC | David H WangSee Remarks | Sell Plan | 6,295852,113 held (−1%) | $88.98 | $560K | -19.8% | — |
| Jun 5SEC | David H WangSee Remarks | Sell Plan | 5,843803,895 held (−1%) | $92.38 | $540K | -22.7% | — |
| Jun 5SEC | David H WangSee Remarks | Sell Plan | 4,300858,408 held (−0%) | $87.57 | $377K | -18.5% | — |
| Jun 5SEC | Sotheara CheavSee Remarks | Sell Plan | 2,839100,002 held (−3%) | $85.77 | $244K | -16.8% | — |
| Jun 5SEC | Sotheara CheavSee Remarks | Sell Plan | 2,384103,017 held (−2%) | $81.73 | $195K | -12.7% | — |
| Jun 5SEC | David H WangSee Remarks | Sell Plan | 2,060840,650 held (−0%) | $83.86 | $173K | -14.9% | — |
| Jun 5SEC | Sotheara CheavSee Remarks | Sell Plan | 1,647100,002 held (−2%) | $85.41 | $141K | -16.4% | — |
| Jun 5SEC | David H WangSee Remarks | Sell Plan | 1,187802,708 held (−0%) | $93.04 | $110K | -23.3% | — |
| Jun 5SEC | Sotheara CheavSee Remarks | Sell Plan | 1,300112,053 held (−1%) | $84.08 | $109K | -15.1% | — |
| Jun 5SEC | Sotheara CheavSee Remarks | Sell Plan | 968102,049 held (−1%) | $82.61 | $80K | -13.6% | — |
| Jun 5SEC | David H WangSee Remarks | Sell Plan | 826802,708 held (−0%) | $87.91 | $73K | -18.8% | — |
| Jun 5SEC | Sotheara CheavSee Remarks | Sell Plan | 400101,649 held (−0%) | $84.01 | $34K | -15.0% | — |
| May 21SEC | Haiping DunDirector | Sell Plan | 1,858 | $67.54 | $125K | +5.7% | — |
| May 21SEC | Haiping DunDirector | Sell Plan | 1,3091,858 held (−41%) | $67.21 | $88K | +6.2% | — |
| May 21SEC | Haiping DunDirector | Sell Plan | 1,3333,667 held (−27%) | $63.84 | $85K | +11.8% | — |
| May 21SEC | Haiping DunDirector | Sell Plan | 5003,167 held (−14%) | $65.09 | $33K | +9.6% | — |
| Apr 21SEC | Charles C PappisDirector | Sell Plan | 5,000 | $52.00 | $260K | +37.3% | — |
| Mar 13SEC | David H WangSee Remarks | Sell Plan | 55,373807,335 held (−6%) | $47.89 | $2.7M | +49.0% | — |
| Mar 13SEC | Mark MckechnieSee Remarks | Sell Plan | 47,1081,882 held (−96%) | $45.74 | $2.2M | +56.0% | — |
| Mar 13SEC | David H WangSee Remarks | Sell Plan | 38,737803,410 held (−5%) | $45.74 | $1.8M | +56.0% | — |
| Mar 13SEC | Mark MckechnieSee Remarks | Sell Plan | 29,3481,464 held (−95%) | $45.74 | $1.3M | +56.0% | — |
| Mar 13SEC | Mark MckechnieSee Remarks | Sell Plan | 11,91048,990 held (−20%) | $44.89 | $535K | +59.0% | — |
| Mar 13SEC | David H WangSee Remarks | Sell Plan | 10,561842,147 held (−1%) | $44.92 | $474K | +58.9% | — |
| Mar 13SEC | Mark MckechnieSee Remarks | Sell Plan | 8,63930,812 held (−22%) | $44.94 | $388K | +58.8% | — |
| Mar 13SEC | David H WangSee Remarks | Sell Plan | 4,627802,708 held (−1%) | $48.34 | $224K | +47.6% | — |
| Mar 13SEC | Mark MckechnieSee Remarks | Sell Plan | 982900 held (−52%) | $46.55 | $46K | +53.3% | — |
| Mar 13SEC | David H WangSee Remarks | Sell Plan | 702802,708 held (−0%) | $46.57 | $33K | +53.3% | — |
| Mar 13SEC | Mark MckechnieSee Remarks | Sell Plan | 564900 held (−39%) | $46.57 | $26K | +53.3% | — |
| Mar 12SEC | Tracy LiuDirector | Sell Plan | 32,216123,556 held (−21%) | $47.06 | $1.5M | +51.7% | — |
| Mar 12SEC | Tracy LiuDirector | Sell Plan | 12,784110,772 held (−10%) | $48.19 | $616K | +48.1% | — |
| Mar 12SEC | Tracy LiuDirector | Sell Plan | 11,623114,149 held (−9%) | $47.81 | $556K | +49.3% | — |
| Mar 12SEC | Tracy LiuDirector | Sell Plan | 3,377110,772 held (−3%) | $48.25 | $163K | +47.9% | — |
| Mar 11SEC | Haiping DunDirector | Sell Plan | 4,100900 held (−82%) | $43.37 | $178K | +64.6% | — |
| Mar 11SEC | Haiping DunDirector | Sell Plan | 900 | $43.94 | $40K | +62.4% | — |
| Mar 9SEC | Lisa FengSee Remarks | Sell Plan | 14,80050,201 held (−23%) | $46.07 | $682K | +54.9% | — |
| Mar 9SEC | Lisa FengSee Remarks | Sell Plan | 8,05056,951 held (−12%) | $49.81 | $401K | +43.3% | — |
| Mar 9SEC | Lisa FengSee Remarks | Sell Plan | 6,95050,001 held (−12%) | $50.24 | $349K | +42.1% | — |
| Mar 9SEC | Charles C PappisDirector | Sell Plan | 5,000 | $50.09 | $250K | +42.5% | — |
| Mar 9SEC | Lisa FengSee Remarks | Sell Plan | 20050,001 held (−0%) | $46.58 | $9K | +53.2% | — |
| Dec 8SEC | Mark MckechnieSee Remarks | Sell Plan | 22,500900 held (−96%) | $35.45 | $798K | +101.3% | — |
| Dec 8SEC | Mark MckechnieSee Remarks | Sell Plan | 7,7541,896 held (−80%) | $33.50 | $260K | +113.0% | — |
| Dec 8SEC | Mark MckechnieSee Remarks | Sell Plan | 996900 held (−53%) | $34.26 | $34K | +108.3% | — |
| Dec 5SEC | David H WangSee Remarks | Sell Plan | 68,800803,908 held (−8%) | $33.05 | $2.3M | +115.9% | — |
| Dec 5SEC | David H WangSee Remarks | Sell Plan | 40,183802,708 held (−5%) | $34.42 | $1.4M | +107.4% | — |
| Dec 5SEC | David H WangSee Remarks | Sell Plan | 19,817842,891 held (−2%) | $33.52 | $664K | +112.9% | — |
| Dec 5SEC | David H WangSee Remarks | Sell Plan | 1,200802,708 held (−0%) | $33.56 | $40K | +112.7% | — |
| Dec 4SEC | Fuping ChenSee Remarks | Sell Plan | 100,000 | $33.20 | $3.3M | +115.0% | — |
| Dec 4SEC | Fuping ChenSee Remarks | Sell Plan | 19,700300 held (−98%) | $33.05 | $651K | +115.9% | — |
| Dec 4SEC | Fuping ChenSee Remarks | Sell Plan | 300 | $33.57 | $10K | +112.6% | — |
| Nov 14SEC | Lisa FengSee Remarks | Sell Plan | 15,00050,001 held (−23%) | $33.77 | $507K | +111.3% | — |
| Nov 14SEC | Lisa FengSee Remarks | Sell Plan | 15,00050,001 held (−23%) | $32.76 | $491K | +117.9% | — |
Insiders at ACM Research, Inc.
| Insider | Bought | Sold | Last filing | Score |
|---|---|---|---|---|
| David H WangSee Remarks | — | $29.0M | Sep 10, 2026 | — |
| Mark MckechnieSee Remarks | — | $9.8M | Aug 21, 2026 | — |
| Fuping ChenSee Remarks | — | $4.0M | Dec 4, 2025 | — |
| Tracy LiuDirector | — | $2.9M | Mar 12, 2026 | — |
| Lisa FengSee Remarks | — | $2.4M | Mar 9, 2026 | — |
| Sotheara CheavSee Remarks | — | $1.6M | Jun 5, 2026 | — |
| Haiping DunDirector | — | $954K | Aug 20, 2026 | — |
| Charles C PappisDirector | — | $510K | Apr 21, 2026 | — |
ACMR stock: common questions
Are ACM Research, Inc. insiders buying ACMR stock?
In the past 12 months, 0 insiders reported open-market purchases of ACMR worth $0.
Are ACM Research, Inc. insiders selling ACMR stock?
8 insiders reported sales worth $51.2M over the same period.
Where does this data come from?
Every transaction comes from Form 4 filings that insiders must submit to the SEC within two business days of a trade. We pull them from SEC EDGAR every night.
What is ACMR's 52-week range?
Over the past year ACMR has traded between $29.67 and $126.89. It last closed at $71.37 on Oct 9, 2026.