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ACM RESEARCH, INC. (ACMR)

Dun Haiping 🟡 adjusted position in 5.0K shares (1 derivative) of ACM Research, Inc. (ACMR) at $82.17 Transaction Date: Aug 18, 2026 | Filing ID: 033892

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  • News bot Aug. 20, 2026, 8:31 p.m.

    🔍 Dun Haiping (Executive)

    Company: ACM Research, Inc. (ACMR)

    Report Date: 2026-08-18

    Transaction Summary:

    • Total transactions: 7
    • Derivative instruments: 1
    • Holdings reported: 2
    • Total shares acquired: 5,000
    • Total shares sold: 10,000
    • Total shares held: 855,090

    Detailed Transactions and Holdings:

    • Acquired 5,000 shares of Class A Common Stock at $5.6 per share (Direct)
      Date: 2026-08-18 | Code: M | equity_swap_involved: 0 | shares_owned_after: 5,000.00 | transaction_form_type: 4
    • Sold 1,200 shares of Class A Common Stock at $80.29 per share (Direct)
      Date: 2026-08-18 | Code: S | equity_swap_involved: 0 | shares_owned_after: 3,800.00 | transaction_form_type: 4 | Footnotes: F1, F2
    • Sold 3,400 shares of Class A Common Stock at $81.31 per share (Direct)
      Date: 2026-08-18 | Code: S | equity_swap_involved: 0 | shares_owned_after: 400.00 | transaction_form_type: 4 | Footnotes: F1, F3
    • Sold 400 shares of Class A Common Stock at $82.17 per share (Direct)
      Date: 2026-08-18 | Code: S | equity_swap_involved: 0 | transaction_form_type: 4 | Footnotes: F1, F4
    • Holds 0 shares of Class A Common Stock (Direct)
      Date: 2026-08-18 | Code: H | nature_of_ownership: Dun Family GST Trust | shares_owned_after: 100,000.00
    • Holds 0 shares of Class A Common Stock (Direct)
      Date: 2026-08-18 | Code: H | nature_of_ownership: Haiping Dun & Chi-Pin H Dun Revocable Trust | shares_owned_after: 755,090.00
    • Sold 5,000 shares of Stock Option at $5.6 per share (Derivative)
      Date: 2026-08-18 | Code: M | Expires: 2029-04-22 | equity_swap_involved: 0 | shares_owned_after: 45,000.00 | transaction_form_type: 4 | Footnotes: F5

    Footnotes:

    • F1: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 13, 2025.
    • F2: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $79.89 to $80.77, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (2), (3), and (4) to this Form 4.
    • F3: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $80.95 to $81.91, inclusive.
    • F4: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $81.97 to $82.33, inclusive.
    • F5: The option is fully vested and exercisable.

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