ACM Research, Inc. — Director's Dealing 2025

Mar 5, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ACM Research, Inc. (ACMR)
CIK: 0001680062
Period of Report: 2025-03-03

Reporting Person: Wang David H (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-03-03	Class A Common Stock	M	210000	$0.5	Acquired	808006	Direct
2025-03-03	Class A Common Stock	F	4048	$25.94	Disposed	803958	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-03-03	Stock Option	$0.5	M	210000	Disposed	2025-04-30	Class A Common Stock (210000)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Class A Common Stock	100002	Indirect
Class A Common Stock	45837	Indirect
Class A Common Stock	180000	Indirect
Class A Common Stock	620001	Indirect

Footnotes

F1: On March 3, 2025, the reporting person exercised, by net exercise, a previously issued stock option to purchase 210,000 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 4,048 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 February 28, 2025 of $25.94, and issuing to the reporting person the remaining 205,952 shares of Class A Common Stock.

F2: The option is fully vested and exercisable.