ACM Research, Inc. — Director's Dealing 2021

Apr 5, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

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

Reporting Person: Cheav Sotheara (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-04-05	Class A Common Stock	M	13334	$1.5	Acquired	56668	Direct
2021-04-05	Class A Common Stock	F	223	$90.08	Disposed	56445	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-04-05	Stock Option	$1.5	M	13334	Disposed	2025-05-01	Class A Common Stock (13334)	Direct

Footnotes

F1: On April 5, 2021, the reporting person exercised, by net exercise, a previously issued stock option to purchase 13,334 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 223 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 April 1, 2021 of $90.08, and issuing to the reporting person the remaining 13,111 shares of Class A Common Stock.

F2: The option is fully vested and exercisable.