ACM Research, Inc. — Director's Dealing 2021

Mar 16, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ACM Research, Inc. (ACMR)
CIK: 0001680062
Period of Report: 2021-03-12

Reporting Person: Wang David H (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-03-12	Class A Common Stock	M	100001	$0.75	Acquired	268007	Direct
2021-03-12	Class A Common Stock	F	773	$97.05	Disposed	267234	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-03-12	Stock Option	$0.75	M	100001	Disposed	2021-05-01	Class A Common Stock (100001)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Class A Common Stock	33334	Indirect
Class A Common Stock	15279	Indirect
Class A Common Stock	60000	Indirect
Class A Common Stock	206667	Indirect

Footnotes

F1: On March 12, 2021, the reporting person exercised, by net exercise, a previously issued stock option to purchase 100,001 shares of Class A Common Stock of the Issuer. The reporting person paid the exercise price on a cashless basis, resulting in the Issuer withholding 773 shares of Class A Common Stock for payment of the exercise price, based on the closing price of the Issuer's Class A Common Stock on March 11, 2021 of $97.05, and issuing to the reporting person the remaining 99,228 shares of Class A Common Stock.

F2: The option is fully vested and exercisable.