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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.

Overview All Filings Annual Quarterly Insiders
Insider Title Type Shares Price Value Owns After Date
Dun Haiping Option Exercise 35,000 $0.50 $17,500 890,090 May 14, 2024
Wang David H See Remarks Sale 76,478 $27.51 $2,103,910 514,629 Mar 14, 2024
Dun Haiping Sale 3,557 $28.34 $100,805 855,090 Mar 14, 2024
Cheav Sotheara See remarks Sale 2,383 $28.32 $67,487 100,002 Mar 14, 2024
Dun Haiping Sale 15,000 $30.36 $455,400 874,524 Mar 8, 2024
Wang David H See Remarks Sale 45,000 $30.36 $1,366,200 636,107 Mar 8, 2024
Wang David H See Remarks Option Exercise 180,000 $0.50 $90,000 684,018 Mar 1, 2024
Dun Haiping Option Exercise 35,000 $0.50 $17,500 890,090 Mar 1, 2024
Feng Lisa See remarks Option Exercise 7,500 $5.60 $42,000 57,501 Feb 28, 2024
Liu Tracy Option Exercise 12,500 $5.60 $70,000 123,272 Feb 28, 2024
McKechnie Mark See Remarks Sale 10,000 $22.00 $220,000 900 Jan 12, 2024
Liu Tracy Sale 10,000 $20.00 $200,000 110,772 Dec 26, 2023
Feng Lisa See remarks Sale 7,500 $20.00 $150,000 50,001 Dec 26, 2023
Dun Haiping Sale 18,984 $17.25 $327,474 855,090 Nov 29, 2023
Wang David H See Remarks Sale 39,776 $17.13 $681,363 504,018 Nov 29, 2023
Wang David H See Remarks Sale 45,000 $17.67 $795,150 633,794 Nov 22, 2023
Dun Haiping Sale 15,000 $17.66 $264,900 874,074 Nov 22, 2023
Liu Tracy Sale 15,000 $17.91 $268,650 36,924 Nov 20, 2023
Wang David H See Remarks Option Exercise 180,000 $0.50 $90,000 684,018 Nov 14, 2023
Dun Haiping Tax Withholding 1,016 $17.23 $17,506 889,074 Nov 14, 2023
Cheav Sotheara See remarks Option Exercise 12,500 $4.62 $57,750 136,002 Nov 13, 2023
McKechnie Mark See Remarks Sale 11,250 $20.00 $225,000 900 Oct 11, 2023
Wang David H See Remarks Sale 3,573 $18.72 $66,887 589,134 Sep 13, 2023
Wang David H See Remarks Tax Withholding 4,884 $18.43 $90,012 679,134 Sep 4, 2023
McKechnie Mark See Remarks Sale 30,000 $18.00 $540,000 900 Sep 1, 2023
Chen Fuping See remarks Option Exercise 8,835 $1.77 $15,638 105,000 Aug 23, 2023
Dun Haiping Sale 32,098 $13.85 $444,557 855,090 Aug 22, 2023
Feng Lisa See remarks Sale 22,500 $15.00 $337,500 50,001 Jul 3, 2023
Cheav Sotheara See remarks Sale 39,000 $10.00 $390,000 110,002 Jun 6, 2023
Dun Haiping Sale 37,500 $10.00 $375,000 887,188 Jun 1, 2023
Dun Haiping Option Exercise 37,500 $0.50 $18,750 926,616 May 22, 2023
Dun Haiping Sale 37,500 $12.06 $452,250 889,116 Mar 16, 2023
Dun Haiping Tax Withholding 1,504 $12.47 $18,755 926,616 Mar 9, 2023
Feng Lisa See remarks Option Exercise 22,500 $1.77 $39,825 72,501 Mar 9, 2023
Dun Haiping Sale 35,327 $8.43 $297,807 890,620 Nov 30, 2022
Dun Haiping Tax Withholding 2,173 $8.63 $18,753 925,947 Nov 22, 2022
Dun Haiping Option Exercise 37,500 $0.50 $18,750 892,590 Nov 14, 2022
Dun Haiping Sale 36,537 $16.10 $588,246 855,090 Aug 22, 2022
Cheav Sotheara See remarks Sale 10,000 $17.50 $175,000 110,002 Aug 18, 2022
Cheav Sotheara See remarks Sale 9,182 $17.50 $160,685 125,820 Aug 17, 2022
Dun Haiping Tax Withholding 963 $19.49 $18,769 928,146 Aug 15, 2022
Dun Haiping Option Exercise 37,500 $0.50 $18,750 892,590 Aug 8, 2022
Dun Haiping Sale 36,150 $15.00 $542,250 855,090 May 27, 2022
Dun Haiping Option Exercise 37,500 $0.50 $18,750 892,590 May 18, 2022
McKechnie Mark See Remarks Sale 700 $63.42 $44,394 3,100 Mar 10, 2022
Dun Haiping Sale 1,200 $80.48 $96,576 308,368 Mar 9, 2022
Dun Haiping Tax Withholding 231 $81.46 $18,817 297,299 Mar 2, 2022
McKechnie Mark See Remarks Sale 300 $99.58 $29,874 166 Nov 18, 2021
Feng Lisa See remarks Option Exercise 2,437 $5.60 $13,647 16,667 Nov 3, 2021
Xiang Yinan Sale 33,000 $86.08 $2,840,640 1,357,799 Aug 23, 2021