SEC Form 4 · accession 0001140361-26-034070
ACM Research, Inc. · ACMR
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Mark McKechnie
Officer — See Remarks
Period of report
Aug 20, 2026
Accepted (ET)
Aug 21, 2026 · 9:30 pm EDT
Rule 10b5-1 plan
yes — trade under a plan
Issuer CIK
0001680062
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Class A Common Stock | Aug 20, 2026 | M | 30,199 | $19.49 | A | 31,099 | D | |
| Class A Common Stock | Aug 20, 2026 | M | 25,000 | $13.89 | A | 56,099 | D | |
| Class A Common StockF2 | Aug 20, 2026 | S | 13,625 | $76.34 | D | 42,474 | D | |
| Class A Common StockF3 | Aug 20, 2026 | S | 30,365 | $77.45 | D | 12,109 | D | |
| Class A Common StockF4 | Aug 20, 2026 | S | 11,209 | $77.89 | D | 900 | D |
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Stock OptionF5 | $19.49 | Aug 20, 2026 | M | 30,199 | D | — | Aug 11, 2032 | Class A Common Stock | 30,199 | 31,250 | D |
| Stock OptionF5 | $13.89 | Aug 20, 2026 | M | 25,000 | D | — | Aug 9, 2033 | Class A Common Stock | 25,000 | 215,000 | D |
Explanation of responses
- F1The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 21, 2026.
- F2The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $75.76 to $76.68, 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.
- F3The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $76.81 to $77.79, inclusive.
- F4The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $77.84 to $78.4, inclusive.
- F5The option is fully vested and exercisable.
Remarks
Chief Financial Officer and Treasurer