ACM Research, Inc. — Insider Transactions
Form 4 filings by directors, officers, and 10%+ shareholders
SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.
| Insider | Title | Type | Shares | Price | Value | Owns After | Date |
|---|---|---|---|---|---|---|---|
| McKechnie Mark | See Remarks | Sale | 996 | $34.26 | $34,123 | 900 | Dec 4, 2025 |
| Wang David H | See Remarks | Option Exercise | 70,000 | $1.00 | $70,000 | 872,708 | Dec 3, 2025 |
| Chen Fuping | See remarks | Sale | 300 | $33.57 | $10,071 | — | Dec 2, 2025 |
| Feng Lisa | See remarks | Sale | 15,000 | $33.77 | $506,550 | 50,001 | Nov 13, 2025 |
| Dun Haiping | — | Gift | 755,090 | — | — | — | Nov 12, 2025 |
| Cheav Sotheara | See remarks | Option Exercise | 10,000 | $13.89 | $138,900 | 110,002 | Sep 18, 2025 |
| Wang Jian | See remarks | Sale | 30,000 | $35.00 | $1,050,000 | 253,158 | Sep 18, 2025 |
| Liu Tracy | — | Sale | 15,000 | $33.00 | $495,000 | 110,772 | Sep 17, 2025 |
| Wang David H | See Remarks | Option Exercise | 130,000 | $1.00 | $130,000 | 802,708 | Sep 8, 2025 |
| Wang David H | See Remarks | Option Exercise | 70,000 | $1.00 | $70,000 | 742,708 | Sep 4, 2025 |
| Wang Jian | See remarks | Sale | 30,000 | $30.00 | $900,000 | 253,158 | Aug 25, 2025 |
| Cheav Sotheara | See remarks | Option Exercise | 11,152 | $13.89 | $154,901 | 111,154 | Aug 22, 2025 |
| Liu Tracy | — | Option Exercise | 15,000 | $1.00 | $15,000 | 125,772 | Jul 15, 2025 |
| Feng Lisa | See remarks | Sale | 15,000 | $28.00 | $420,000 | 50,001 | Jul 7, 2025 |
| Feng Lisa | See remarks | Option Exercise | 15,000 | $5.60 | $84,000 | 65,001 | Jun 24, 2025 |
| Wang David H | See Remarks | Option Exercise | 60,000 | $1.00 | $60,000 | 732,708 | May 21, 2025 |
| McKechnie Mark | See Remarks | Sale | 15,000 | $25.22 | $378,300 | 900 | May 14, 2025 |
| Hu Chenming | — | Sale | 163,308 | $30.00 | $4,899,240 | 100,002 | Mar 17, 2025 |
| Dun Haiping | — | Sale | 2,456 | $28.32 | $69,554 | 762,152 | Mar 14, 2025 |
| Wang David H | See Remarks | Sale | 37,500 | $27.42 | $1,028,250 | 710,208 | Mar 13, 2025 |
| McKechnie Mark | See Remarks | Option Exercise | 15,000 | $5.60 | $84,000 | 15,900 | Mar 12, 2025 |
| Dun Haiping | — | Sale | 15,001 | $26.54 | $398,127 | 764,608 | Mar 10, 2025 |
| Dun Haiping | — | Tax Withholding | 482 | $25.94 | $12,503 | 779,609 | Mar 3, 2025 |
| Wang David H | See Remarks | Tax Withholding | 4,048 | $25.94 | $105,005 | 803,958 | Mar 3, 2025 |
| Cheav Sotheara | See remarks | Sale | 22,598 | $23.00 | $519,754 | 100,002 | Feb 6, 2025 |
| McKechnie Mark | See Remarks | Sale | 15,000 | $22.00 | $330,000 | 900 | Feb 6, 2025 |
| Dun Haiping | — | Sale | 19,058 | $17.43 | $332,181 | 755,090 | Nov 29, 2024 |
| Wang David H | See Remarks | Sale | 56,250 | $17.44 | $981,000 | 598,006 | Nov 29, 2024 |
| Wang David H | See Remarks | Sale | 46,766 | $17.80 | $832,435 | 663,740 | Nov 26, 2024 |
| Dun Haiping | — | Sale | 15,000 | $19.12 | $286,800 | 774,148 | Nov 22, 2024 |
| Wang David H | See Remarks | Sale | 56,250 | $19.08 | $1,073,250 | 710,506 | Nov 22, 2024 |
| Dun Haiping | — | Option Exercise | 35,000 | $0.50 | $17,500 | 790,090 | Nov 14, 2024 |
| Wang David H | See Remarks | Tax Withholding | 7,262 | $18.59 | $135,001 | 766,756 | Nov 14, 2024 |
| Shanghai Pudong Science & Technology Investment Group Co., Ltd. | — | Sale | 570,735 | $21.52 | $12,282,217 | 2,833,171 | Oct 4, 2024 |
| Xing Xiao | — | Sale | 977 | $26.01 | $25,412 | 2,428,906 | Oct 4, 2024 |
| McKechnie Mark | See Remarks | Sale | 16,516 | $22.00 | $363,352 | 900 | Oct 4, 2024 |
| Xing Xiao | — | Sale | 8,304 | $20.19 | $167,658 | 3,430,206 | Oct 2, 2024 |
| Shanghai Science & Technology Venture Capital (Group) Co., Ltd. | — | Sale | 26,300 | $20.01 | $526,263 | 3,403,906 | Oct 1, 2024 |
| Dun Haiping | — | Sale | 19,097 | $18.08 | $345,274 | 755,090 | Aug 29, 2024 |
| Dun Haiping | — | Sale | 15,000 | $19.85 | $297,750 | 774,187 | Aug 22, 2024 |
| Dun Haiping | — | Option Exercise | 35,000 | $0.50 | $17,500 | 790,090 | Aug 14, 2024 |
| Dun Haiping | — | Gift | 100,000 | — | — | 755,090 | Jun 27, 2024 |
| Wang Jian | See remarks | Option Exercise | 30,000 | $4.62 | $138,600 | 283,158 | Jun 10, 2024 |
| Wang Jian | See remarks | Sale | 30,000 | $22.92 | $687,600 | 253,158 | Jun 6, 2024 |
| McKechnie Mark | See Remarks | Sale | 5,984 | $22.92 | $137,153 | 900 | Jun 6, 2024 |
| Dun Haiping | — | Sale | 19,239 | $22.63 | $435,379 | 855,090 | May 29, 2024 |
| Wang David H | See Remarks | Sale | 41,090 | $22.62 | $929,456 | 504,018 | May 29, 2024 |
| Dun Haiping | — | Sale | 15,000 | $22.88 | $343,200 | 874,329 | May 22, 2024 |
| Wang David H | See Remarks | Sale | 45,000 | $22.81 | $1,026,450 | 635,108 | May 22, 2024 |
| Wang David H | See Remarks | Option Exercise | 180,000 | $0.50 | $90,000 | 684,018 | May 14, 2024 |