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: 2021-03-15

Reporting Person: Cheav Sotheara (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-03-15	Class A Common Stock	M	10000	$13.85	Acquired	53334	Direct
2021-03-15	Class A Common Stock	S	10000	$91.67	Disposed	43334	Direct
2021-03-16	Class A Common Stock	M	10000	$13.85	Acquired	53334	Direct
2021-03-16	Class A Common Stock	S	10000	$93.69	Disposed	43334	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-03-15	Stock Option	$13.85	M	10000	Disposed	2028-07-31	Class A Common Stock (10000)	Direct
2021-03-16	Stock Option	$13.85	M	10000	Disposed	2028-07-31	Class A Common Stock (10000)	Direct

Footnotes

F1: On March 15, 2021, the reporting person exercised a previously issued stock option to purchase 10,000 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.

F3: On March 16, 2021, the reporting person exercised a previously issued stock option to purchase 10,000 shares of Class A Common Stock of the Issuer.

F4: The option vested and became exercisable as to 10,000 shares on August 1, 2019, and the remaining 30,000 shares vest and become exercisable in equal monthly installments over the following 36 months, subject to continued service through each vesting date.