ACM Research, Inc. — Director's Dealing 2021

May 6, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ACM Research, Inc. (ACMR)
CIK: 0001680062
Period of Report: 2021-05-04

Reporting Person: Hu Chenming (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-05-04	Class A Common Stock	M	23334	$3	Acquired	87770	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-05-04	Stock Option	$3	M	23334	Acquired	2026-12-27	Class A Common Stock (23334)	Direct

Footnotes

F1: On May 4, 2021, the reporting person exercised a previously issued stock option to purchase 23,334 shares of Class A Common Stock of the Issuer.

F2: The option is fully vested and exercisable.