ACM Research, Inc. (ACMR)
Data as of , from SEC Form 4 filings.
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About ACM Research, Inc. (ACMR)
ACM Research Inc supplies capital equipment developed for the semiconductor industry. The company focuses on developing differentiated process solutions that enable effective particle removal, uniform material deposition, and reliable process control for the fabricators of integrated circuits. Its product offerings include wet-cleaning, plating, furnace, PECVD, track, and other front-end processing equipment. Additionally, it develops, manufactures, and sells a range of packaging equipment to wafer assembly and packaging customers. Geographically, the company generates maximum revenue from its customers in Mainland China, and the rest from other regions.
- FREMONT, CA
- 2,513
- 2017
- Nasdaq
ACMR Form 4 activity by transaction type, last 90 days
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Open-market sale | 15 | 200,199 | $15.30M |
| Grant or award | 6 | 21,384 | |
| Option exercise | 10 | 400,398 |
Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.
ACMR insider transactions (Form 4)
16047 Form 4 filings on record, the earliest from Oct 3, 2024, newest first. Filing history page 1 of 2.
| Traded | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| David H. Wang - Officer | Option exercise | Class A Common Stock | 70,000 | $1.00 | $70K | |
| David H. Wang - Officer | Open-market sale | Class A Common Stock | 4,803 | $75.99 footnote F2 | $365K | |
| David H. Wang - Officer | Open-market sale | Class A Common Stock | 51,374 | $77.15 footnote F3 | $3.96M | |
| David H. Wang - Officer | Open-market sale | Class A Common Stock | 12,323 | $78.08 footnote F4 | $962K | |
| David H. Wang - Officer | Open-market sale | Class A Common Stock | 1,500 | $78.57 footnote F5 | $118K | |
| David H. Wang - Officer | Option exercise | Class A Common Stock | 70,000 | $1.00 | $70K | |
| David H. Wang - Officer | Open-market sale | Class A Common Stock | 33,493 | $73.80 footnote F6 | $2.47M | |
| David H. Wang - Officer | Open-market sale | Class A Common Stock | 18,934 | $74.67 footnote F7 | $1.41M | |
| David H. Wang - Officer | Open-market sale | Class A Common Stock | 11,666 | $75.58 footnote F8 | $882K | |
| David H. Wang - Officer | Open-market sale | Class A Common Stock | 4,807 | $76.73 footnote F9 | $369K | |
| David H. Wang - Officer | Open-market sale | Class A Common Stock | 1,100 | $77.59 footnote F10 | $85K | |
| David H. Wang - Officer | Option exercise | Stock Option | 70,000 | $0.00 | - | |
| David H. Wang - Officer | Option exercise | Stock Option | 70,000 | $0.00 | - | |
| ||||||
| Charles C. Pappis - Director | Grant or award | Stock Option | 6,400 | $0.00 | - | |
| Charles C. Pappis - Director | Grant or award | Restricted Stock Units | 728 | $0.00 | - | |
| Tracy Liu - Director | Grant or award | Stock Option | 6,400 | $0.00 | - | |
| Tracy Liu - Director | Grant or award | Restricted Stock Units | 728 | $0.00 | - | |
| Haiping Dun - Director | Grant or award | Stock Option | 6,400 | $0.00 | - | |
| Haiping Dun - Director | Grant or award | Restricted Stock Units | 728 | $0.00 | - | |
| Mark McKechnie - Officer | Option exercise | Class A Common Stock | 30,199 | $19.49 | $589K | |
| Mark McKechnie - Officer | Option exercise | Class A Common Stock | 25,000 | $13.89 | $347K | |
| Mark McKechnie - Officer | Open-market sale | Class A Common Stock | 13,625 | $76.34 footnote F2 | $1.04M | |
| Mark McKechnie - Officer | Open-market sale | Class A Common Stock | 30,365 | $77.45 footnote F3 | $2.35M | |
| Mark McKechnie - Officer | Open-market sale | Class A Common Stock | 11,209 | $77.89 footnote F4 | $873K | |
| Mark McKechnie - Officer | Option exercise | Stock Option | 30,199 | $0.00 | - | |
| Mark McKechnie - Officer | Option exercise | Stock Option | 25,000 | $0.00 | - | |
| ||||||
| Haiping Dun - Director | Option exercise | Class A Common Stock | 5,000 | $5.60 | $28K | |
| Haiping Dun - Director | Open-market sale | Class A Common Stock | 1,200 | $80.29 footnote F2 | $96K | |
| Haiping Dun - Director | Open-market sale | Class A Common Stock | 3,400 | $81.31 footnote F3 | $276K | |
| Haiping Dun - Director | Open-market sale | Class A Common Stock | 400 | $82.17 footnote F4 | $33K | |
| Haiping Dun - Director | Option exercise | Stock Option | 5,000 | $0.00 | - | |
| ||||||
| David H. Wang - Officer | Grant or award | Restricted Stock Units | 6,208 footnote F2 | $0.00 | - | |
| ||||||
| Sotheara Cheav - Officer | Option exercise | Class A Common Stock | 13,351 | $13.89 | $185K | |
| Sotheara Cheav - Officer | Option exercise | Class A Common Stock | 5,399 | $13.89 | $75K | |
| Sotheara Cheav - Officer | Open-market sale | Class A Common Stock | 1,300 | $84.08 footnote F2 | $109K | |
| Sotheara Cheav - Officer | Open-market sale | Class A Common Stock | 9,212 | $85.11 footnote F3 | $784K | |
| Sotheara Cheav - Officer | Open-market sale | Class A Common Stock | 2,839 | $85.77 footnote F4 | $244K | |
| Sotheara Cheav - Officer | Open-market sale | Class A Common Stock | 2,384 | $81.73 footnote F5 | $195K | |
| Sotheara Cheav - Officer | Open-market sale | Class A Common Stock | 968 | $82.61 footnote F6 | $80K | |
| Sotheara Cheav - Officer | Open-market sale | Class A Common Stock | 400 | $84.01 footnote F7 | $34K | |
| Sotheara Cheav - Officer | Open-market sale | Class A Common Stock | 1,647 | $85.41 footnote F8 | $141K | |
| Sotheara Cheav - Officer | Option exercise | Stock Option | 13,351 | $0.00 | - | |
| Sotheara Cheav - Officer | Option exercise | Stock Option | 5,399 | $0.00 | - | |
| ||||||
| David H. Wang - Officer | Option exercise | Class A Common Stock | 60,000 | $1.00 | $60K | |
| David H. Wang - Officer | Option exercise | Class A Common Stock | 40,002 | $1.00 | $40K | |
| David H. Wang - Officer | Open-market sale | Class A Common Stock | 4,300 | $87.57 footnote F2 | $377K | |
| David H. Wang - Officer | Open-market sale | Class A Common Stock | 6,295 | $88.98 footnote F3 | $560K | |
| David H. Wang - Officer | Open-market sale | Class A Common Stock | 32,450 | $89.84 footnote F4 | $2.92M | |
| David H. Wang - Officer | Open-market sale | Class A Common Stock | 9,925 | $90.78 footnote F5 | $901K | |
| David H. Wang - Officer | Open-market sale | Class A Common Stock | 5,843 | $92.38 footnote F6 | $540K | |
| David H. Wang - Officer | Open-market sale | Class A Common Stock | 1,187 | $93.04 footnote F7 | $110K | |
| David H. Wang - Officer | Open-market sale | Class A Common Stock | 2,060 | $83.86 footnote F8 | $173K | |
| David H. Wang - Officer | Open-market sale | Class A Common Stock | 17,543 | $85.11 footnote F9 | $1.49M | |
| David H. Wang - Officer | Open-market sale | Class A Common Stock | 10,992 | $86.07 footnote F10 | $946K | |
| David H. Wang - Officer | Open-market sale | Class A Common Stock | 8,581 | $87.13 footnote F11 | $748K | |
| David H. Wang - Officer | Open-market sale | Class A Common Stock | 826 | $87.91 footnote F12 | $73K | |
| David H. Wang - Officer | Option exercise | Stock Option | 60,000 | $0.00 | - | |
| David H. Wang - Officer | Option exercise | Stock Option | 40,002 | $0.00 | - | |
| ||||||
| Haiping Dun | Option exercise | Class A Common Stock | 5,000 | $5.60 | $28K | |
| Haiping Dun | Open-market sale | Class A Common Stock | 1,333 | $63.84 footnote F2 | $85K | |
| Haiping Dun | Open-market sale | Class A Common Stock | 500 | $65.09 footnote F3 | $33K | |
| Haiping Dun | Open-market sale | Class A Common Stock | 1,309 | $67.21 footnote F4 | $88K | |
| Haiping Dun | Open-market sale | Class A Common Stock | 1,858 | $67.54 footnote F5 | $125K | |
| Haiping Dun | Option exercise | Stock Option | 5,000 | $0.00 | - | |
| ||||||
| Charles C. Pappis | Option exercise | Class A Common Stock | 5,000 | $29.18 | $146K | |
| Charles C. Pappis | Open-market sale | Class A Common Stock | 5,000 | $52.00 | $260K | |
| Charles C. Pappis | Option exercise | Stock Option | 5,000 | $0.00 | - | |
| Mark McKechnie - Officer | Option exercise | Class A Common Stock | 60,000 | $13.89 | $833K | |
| Mark McKechnie - Officer | Open-market sale | Class A Common Stock | 11,910 | $44.89 footnote F2 | $535K | |
| Mark McKechnie - Officer | Open-market sale | Class A Common Stock | 47,108 | $45.74 footnote F3 | $2.15M | |
| Mark McKechnie - Officer | Option exercise | Class A Common Stock | 38,551 | $19.49 | $751K | |
| Mark McKechnie - Officer | Open-market sale | Class A Common Stock | 982 | $46.55 footnote F4 | $46K | |
| Mark McKechnie - Officer | Open-market sale | Class A Common Stock | 8,639 | $44.94 footnote F5 | $388K | |
| Mark McKechnie - Officer | Open-market sale | Class A Common Stock | 29,348 | $45.74 footnote F6 | $1.34M | |
| Mark McKechnie - Officer | Open-market sale | Class A Common Stock | 564 | $46.57 footnote F7 | $26K | |
| Mark McKechnie - Officer | Option exercise | Stock Option | 60,000 | $0.00 | - | |
| Mark McKechnie - Officer | Option exercise | Stock Option | 38,551 | $0.00 | - | |
| ||||||
| David H. Wang - Officer | Option exercise | Class A Common Stock | 60,000 | $1.00 | $60K | |
| David H. Wang - Officer | Option exercise | Class A Common Stock | 50,000 | $1.00 | $50K | |
| David H. Wang - Officer | Open-market sale | Class A Common Stock | 55,373 | $47.89 footnote F2 | $2.65M | |
| David H. Wang - Officer | Open-market sale | Class A Common Stock | 4,627 | $48.34 footnote F3 | $224K | |
| David H. Wang - Officer | Open-market sale | Class A Common Stock | 10,561 | $44.92 footnote F4 | $474K | |
| David H. Wang - Officer | Open-market sale | Class A Common Stock | 38,737 | $45.74 footnote F5 | $1.77M | |
| David H. Wang - Officer | Open-market sale | Class A Common Stock | 702 | $46.57 footnote F6 | $33K | |
| David H. Wang - Officer | Option exercise | Stock Option | 60,000 | $0.00 | - | |
| David H. Wang - Officer | Option exercise | Stock Option | 50,000 | $0.00 | - | |
| ||||||
| Tracy Liu | Open-market sale | Class A Common Stock | 11,623 | $47.81 footnote F4 | $556K | |
| Tracy Liu | Open-market sale | Class A Common Stock | 3,377 | $48.25 footnote F5 | $163K | |
| Tracy Liu | Option exercise | Stock Option | 45,000 | $0.00 | - | |
| Tracy Liu | Option exercise | Stock Option | 15,000 | $0.00 | - | |
| Tracy Liu | Option exercise | Class A Common Stock | 45,000 | $1.00 | $45K | |
| Tracy Liu | Option exercise | Class A Common Stock | 15,000 | $1.00 | $15K | |
| Tracy Liu | Open-market sale | Class A Common Stock | 32,216 | $47.06 footnote F2 | $1.52M | |
| Tracy Liu | Open-market sale | Class A Common Stock | 12,784 | $48.19 footnote F3 | $616K | |
| ||||||
| Haiping Dun | Open-market sale | Class A Common Stock | 900 | $43.94 footnote F3 | $40K | |
| Haiping Dun | Option exercise | Stock Option | 5,000 | $0.00 | - | |
| Haiping Dun | Option exercise | Class A Common Stock | 5,000 | $5.60 | $28K | |
| Haiping Dun | Open-market sale | Class A Common Stock | 4,100 | $43.37 footnote F2 | $178K | |
| ||||||
| Charles C. Pappis | Option exercise | Class A Common Stock | 5,000 | $29.18 | $146K | |
| Charles C. Pappis | Open-market sale | Class A Common Stock | 5,000 | $50.09 | $250K | |
| Charles C. Pappis | Option exercise | Stock Option | 5,000 | $0.00 | - | |
| Lisa Feng - Officer | Open-market sale | Class A Common Stock | 200 | $46.58 footnote F5 | $9K | |
| Lisa Feng - Officer | Option exercise | Stock Option | 15,000 | $0.00 | - | |
| Lisa Feng - Officer | Option exercise | Stock Option | 15,000 | $0.00 | - | |
| Lisa Feng - Officer | Option exercise | Class A Common Stock | 15,000 | $4.55 | $68K | |
| Lisa Feng - Officer | Option exercise | Class A Common Stock | 15,000 | $4.55 | $68K | |
| Lisa Feng - Officer | Open-market sale | Class A Common Stock | 8,050 | $49.81 footnote F2 | $401K | |
| Lisa Feng - Officer | Open-market sale | Class A Common Stock | 6,950 | $50.24 footnote F3 | $349K | |
| Lisa Feng - Officer | Open-market sale | Class A Common Stock | 14,800 | $46.07 footnote F4 | $682K | |
| ||||||
| David H. Wang - Officer | Grant or award | Stock Option | 545,400 | $0.00 | - | |
| David H. Wang - Officer | Option exercise | Class A Common Stock | 70,000 | $1.00 | $70K | |
| David H. Wang - Officer | Option exercise | Class A Common Stock | 60,000 | $1.00 | $60K | |
| David H. Wang - Officer | Open-market sale | Class A Common Stock | 68,800 | $33.05 footnote F2 | $2.27M | |
| David H. Wang - Officer | Open-market sale | Class A Common Stock | 1,200 | $33.56 footnote F3 | $40K | |
| David H. Wang - Officer | Open-market sale | Class A Common Stock | 19,817 | $33.52 footnote F4 | $664K | |
| David H. Wang - Officer | Open-market sale | Class A Common Stock | 40,183 | $34.42 footnote F5 | $1.38M | |
| David H. Wang - Officer | Option exercise | Stock Option | 70,000 | $0.00 | - | |
| David H. Wang - Officer | Option exercise | Stock Option | 60,000 | $0.00 | - | |
| ||||||
| Fuping Chen - Officer | Option exercise | Class A Common Stock | 100,000 | $1.77 | $177K | |
| Fuping Chen - Officer | Open-market sale | Class A Common Stock | 100,000 | $33.20 footnote F2 | $3.32M | |
| Fuping Chen - Officer | Option exercise | Class A Common Stock | 20,000 | $1.77 | $35K | |
| Fuping Chen - Officer | Open-market sale | Class A Common Stock | 19,700 | $33.05 footnote F3 | $651K | |
| Fuping Chen - Officer | Open-market sale | Class A Common Stock | 300 | $33.57 footnote F4 | $10K | |
| Fuping Chen - Officer | Option exercise | Stock Option | 100,000 | $0.00 | - | |
| Fuping Chen - Officer | Option exercise | Stock Option | 20,000 | $0.00 | - | |
| ||||||
| Haiping Dun | Gift | Class A Common Stock | 755,090 | $0.00 | - | |
| Lisa Feng - Officer | Option exercise | Stock Option | 15,000 | $0.00 | - | |
| Lisa Feng - Officer | Option exercise | Class A Common Stock | 15,000 | $5.60 | $84K | |
| Lisa Feng - Officer | Open-market sale | Class A Common Stock | 15,000 | $32.76 | $491K | |
| Lisa Feng - Officer | Option exercise | Class A Common Stock | 15,000 | $5.60 | $84K | |
| Lisa Feng - Officer | Open-market sale | Class A Common Stock | 15,000 | $33.77 | $507K | |
| Lisa Feng - Officer | Option exercise | Stock Option | 15,000 | $0.00 | - | |
| David H. Wang - Officer | Grant or award | Stock Option | 545,400 | $0.00 | - | |
| Sotheara Cheav - Officer | Option exercise | Class A Common Stock | 10,000 | $13.89 | $139K | |
| Sotheara Cheav - Officer | Open-market sale | Class A Common Stock | 10,000 | $35.00 | $350K | |
| Sotheara Cheav - Officer | Option exercise | Stock Option | 10,000 | $0.00 | - | |
| Jian Wang - Officer | Option exercise | Class A Common Stock | 30,000 | $5.60 | $168K | |
| Jian Wang - Officer | Open-market sale | Class A Common Stock | 30,000 | $35.00 | $1.05M | |
| Jian Wang - Officer | Option exercise | Stock Option | 30,000 | $0.00 | - | |
| Tracy Liu | Option exercise | Class A Common Stock | 15,000 | $1.00 | $15K | |
| Tracy Liu | Open-market sale | Class A Common Stock | 15,000 | $33.00 | $495K | |
| Tracy Liu | Option exercise | Stock Option | 15,000 | $0.00 | - | |
| David H. Wang - Officer | Option exercise | Class A Common Stock | 130,000 | $1.00 | $130K | |
| David H. Wang - Officer | Option exercise | Stock Option | 130,000 | $0.00 | - | |
| David H. Wang - Officer | Option exercise | Class A Common Stock | 70,000 | $1.00 | $70K | |
| David H. Wang - Officer | Open-market sale | Class A Common Stock | 66,057 | $26.73 | $1.77M | |
| David H. Wang - Officer | Open-market sale | Class A Common Stock | 3,943 | $27.31 | $108K | |
| David H. Wang - Officer | Option exercise | Class A Common Stock | 60,000 | $1.00 | $60K | |
| David H. Wang - Officer | Open-market sale | Class A Common Stock | 60,000 | $26.44 | $1.59M | |
| David H. Wang - Officer | Option exercise | Stock Option | 70,000 | $0.00 | - | |
| David H. Wang - Officer | Option exercise | Stock Option | 60,000 | $0.00 | - | |
| Jian Wang - Officer | Option exercise | Class A Common Stock | 30,000 | $5.60 | $168K | |
| Jian Wang - Officer | Open-market sale | Class A Common Stock | 30,000 | $30.00 | $900K | |
| Jian Wang - Officer | Option exercise | Class A Common Stock | 30,000 | $5.60 | $168K | |
| Jian Wang - Officer | Open-market sale | Class A Common Stock | 30,000 | $32.00 | $960K | |
| Jian Wang - Officer | Option exercise | Stock Option | 30,000 | $0.00 | - | |
| Jian Wang - Officer | Option exercise | Stock Option | 30,000 | $0.00 | - | |
| Sotheara Cheav - Officer | Option exercise | Class A Common Stock | 11,152 | $13.89 | $155K | |
| Sotheara Cheav - Officer | Open-market sale | Class A Common Stock | 11,152 | $30.00 | $335K | |
| Sotheara Cheav - Officer | Option exercise | Stock Option | 11,152 | $0.00 | - | |
Item 2.02, 9.01
Item 8.01, 9.01
Item 8.01, 9.01
Item 2.02, 9.01
Recent ACMR Form 144 notices of proposed sale
3An insider files Form 144 before selling restricted or control stock. It announces a planned sale. If the sale goes ahead, it shows up later on a Form 4.
| Filed | Filer | Relationship | Shares | Market value | Notice |
|---|---|---|---|---|---|
| Wang Hui | Officer, Director, 10% Stockholder | 70,000 | $5.22M | View on EDGAR | |
| Wang Hui | Officer, Director, 10% Stockholder | 70,000 |
ACMR insider trading FAQ
What is the latest insider trade for ACMR?
ACM Research, Inc. (ACMR) had 6 insider filings in the last 90 days, with the most recent on 10 September 2026. The full record for ACMR runs to 47 Form 4 filings, the earliest from 3 October 2024. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.
How many insiders are buying ACMR stock?
No insider purchases of ACMR were filed in the last 90 days.
How many insiders are selling ACMR stock?
15 insider sales of ACMR were filed in the last 90 days, totaling $15.30M.
Where can I see ACMR SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page collects ACMR Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
More Industrials companies with insider activity
Recent insider filings
10The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.
- - David H. Wang view on EDGAR
- - Charles C. Pappis view on EDGAR
- - Tracy Liu view on EDGAR
- - Haiping Dun view on EDGAR
- - Mark McKechnie view on EDGAR
- - Haiping Dun view on EDGAR
- - David H. Wang view on EDGAR
- - Sotheara Cheav view on EDGAR
- - David H. Wang view on EDGAR
Related companies with recent insider activity
Learn more
- Insider selling: signal or noise?
- Why most insider sales are routine, and the few patterns worth a second look.
- Form 144 vs Form 4
- A Form 144 announces a planned sale; the Form 4 reports it after it happens.
- Insider activity in Industrials
- Where ACMR's peers are being bought and sold.
- Every recent Form 4
- The market-wide feed, updated as filings arrive from SEC EDGAR.
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