ACM Research, Inc. — Director's Dealing 2021

Aug 20, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ACM Research, Inc. (ACMR)
CIK: 0001680062
Period of Report: 2021-08-19

Reporting Person: McKechnie Mark (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-08-19	Class A Common Stock	M	5000	$13.85	Acquired	5000	Direct
2021-08-19	Class A Common Stock	S	4274	$81.91	Disposed	726	Direct
2021-08-19	Class A Common Stock	S	526	$82.74	Disposed	200	Direct
2021-08-19	Class A Common Stock	S	200	$83.89	Disposed	0	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-08-19	Stock Option	$13.85	M	5000	Disposed	2028-07-31	Class A Common Stock (5000)	Direct

Footnotes

F1: On August 19, 2021, the reporting person exercised a previously issued stock option to purchase 5,000 shares of Class A Common Stock of the Issuer.

F2: The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.

F3: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $81.65 to $82.63, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (3), (4) and (5) to this Form 4.

F4: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $82.73 to $83.00, inclusive.

F5: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $83.88 to $83.89, inclusive.

F6: The option vested and became exercisable as to 10,000 shares on August 1, 2019, and the remaining 30,000 shares vest and became or become exercisable in equal monthly installments over the following 36 months, subject to continued service through each vesting date.