ACM Research, Inc. — Director's Dealing 2025

Sep 19, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ACM Research, Inc. (ACMR)
CIK: 0001680062
Period of Report: 2025-09-18

Reporting Person: Wang Jian (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-09-18	Class A Common Stock	M	30000	$5.6	Acquired	283158	Direct
2025-09-18	Class A Common Stock	S	30000	$35	Disposed	253158	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-09-18	Stock Option	$5.6	M	30000	Disposed	2029-04-22	Class A Common Stock (30000)	Direct

Footnotes

F1: On September 18, 2025, the reporting person exercised a previously issued stock option to purchase 30,000 shares of Class A Common Stock of the Issuer.

F2: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 20, 2025.

F3: The option is fully vested and exercisable.