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ACM Research, Inc.·4

Mar 9, 4:30 PM ET

Feng Lisa 4

4 · ACM Research, Inc. · Filed Mar 9, 2026

Research Summary

AI-generated summary of this filing

Updated

ACM Research (ACMR) CFO Feng Lisa Exercises Options, Sells Shares

What Happened
Feng Lisa, Chief Financial Officer of ACM Research (Shanghai) Inc. (a subsidiary of ACM Research, ticker ACMR), exercised two option grants (15,000 shares each) and sold the resulting 30,000 shares in open-market transactions. She paid $4.55 per share on the exercised lots (total cash paid ≈ $136,500) and generated total gross sale proceeds of about $1,441,291 from the sales.

Key Details

  • Transactions reported for March 5–6, 2026; Form 4 filed March 9, 2026 (timely).
  • Exercises: 15,000 shares on 2026-03-05 and 15,000 shares on 2026-03-06 at $4.55 each (Acquired — $68,250 per exercise; $136,500 total). Option is fully vested and exercisable (F6).
  • Open-market sales (total 30,000 shares; gross proceeds ≈ $1,441,291):
    • 2026-03-05: 8,050 shares at a weighted avg $49.81 (≈ $400,971) — trades ranged $49.16–$50.06 (F2).
    • 2026-03-05: 6,950 shares at a weighted avg $50.24 (≈ $349,168) — trades ranged $50.16–$50.54 (F3).
    • 2026-03-06: 14,800 shares at a weighted avg $46.07 (≈ $681,836) — trades ranged $45.51–$46.48 (F4).
    • 2026-03-06: 200 shares at $46.58 (≈ $9,316) — trades ranged $46.52–$46.63 (F5).
  • The filing also shows related derivative conversion/exercise line items recorded at $0 (typical reporting for conversion of derivative instruments).
  • Sales were effected pursuant to a Rule 10b5-1 trading plan adopted Dec 2, 2025 (F1).
  • The filing does not specify shares owned after the transactions in the provided data.

Context

  • This sequence—exercising vested options at a low strike ($4.55) and promptly selling the shares—functions like a cashless exercise: the insider converted options into shares and sold them in the market.
  • Sales under an established 10b5-1 plan are prearranged and can be routine, so they do not necessarily signal a personal view on the company’s near-term prospects.
  • All statements above are factual descriptions from the Form 4; motivations are not provided.

Insider Transaction Report

Form 4
Period: 2026-03-05
ACM Research, Inc.ACMR
Feng Lisa
See remarks
Transactions
  • Exercise/Conversion

    Class A Common Stock

    2026-03-05$4.55/sh+15,000$68,250→ 65,001 total
  • Sale

    Class A Common Stock

    [F1][F2]
    2026-03-05$49.81/sh−8,050$400,971→ 56,951 total
  • Sale

    Class A Common Stock

    [F1][F3]
    2026-03-05$50.24/sh−6,950$349,168→ 50,001 total
  • Exercise/Conversion

    Class A Common Stock

    2026-03-06$4.55/sh+15,000$68,250→ 65,001 total
  • Sale

    Class A Common Stock

    [F1][F4]
    2026-03-06$46.07/sh−14,800$681,836→ 50,201 total
  • Sale

    Class A Common Stock

    [F1][F5]
    2026-03-06$46.58/sh−200$9,316→ 50,001 total
  • Exercise/Conversion

    Stock Option

    [F6]
    2026-03-05−15,000→ 0 total
    Exercise: $4.55Exp: 2029-11-03→ Class A Common Stock (15,000 underlying)
  • Exercise/Conversion

    Stock Option

    [F6]
    2026-03-06−15,000→ 0 total
    Exercise: $4.55Exp: 2029-11-03→ Class A Common Stock (15,000 underlying)
Footnotes (6)
  • [F1]The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 2, 2025.
  • [F2]The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $49.16 to $50.06, 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), (4) and (5) 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 $50.16 to $50.54, inclusive.
  • [F4]The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $45.51 to $46.48, inclusive.
  • [F5]The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $46.52 to $46.63, inclusive.
  • [F6]The option is fully vested and exercisable.
Signature
/s/ Mark McKechnie, Attorney-in-Fact for Lisa Feng|2026-03-09

Documents

1 file
  • 4
    form4.xmlPrimary

    FORM 4