Sotheara Cheav - 13 Nov 2023 Form 4 Insider Report for ACM Research, Inc. (ACMR)

Role: Senior Vice President, Manufacturing of ACM Research (Shanghai), Inc., a subsidiary of the Issuer.
Signature: /s/ Mark McKechnie, Attorney-in-Fact for Sotheara Cheav
Issuer symbol: ACMR
Transactions as of: 13 Nov 2023
Net transactions value: -$306,835
Form type: 4
Filing time: 15 Nov 2023, 16:15:22 UTC
Previous filing: 21 Aug 2023
Next filing: 15 Mar 2024
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ACMR	Class A Common Stock	Options Exercise	$71,955	+13,500	+12%	$5.33	123,502	13 Nov 2023	Direct	F1
transaction	ACMR	Class A Common Stock	Options Exercise	$57,750	+12,500	+10%	$4.62	136,002	13 Nov 2023	Direct	F2
transaction	ACMR	Class A Common Stock	Sale	$436,540	-26,000	-19%	$16.79	110,002	13 Nov 2023	Direct	F3, F4

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	ACMR	Stock Option	Options Exercise	$0	-13,500	-100%	$0.000000^*	0	13 Nov 2023	Class A Common Stock	13,500	$5.33	Direct	F1, F5
transaction	ACMR	Stock Option	Options Exercise	$0	-12,500	-100%	$0.000000^*	0	13 Nov 2023	Class A Common Stock	12,500	$4.62	Direct	F2, F5

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

Transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).

Explanation of Responses:

Id	Content
F1	On November 13, 2023, the reporting person exercised a previously issued stock option to purchase 13,500 shares of Class A Common Stock of the Issuer.
F2	On November 13, 2023, the reporting person exercised a previously issued stock option to purchase 12,500 shares of Class A Common Stock of the Issuer.
F3	The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 11, 2023.
F4	The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.52 to $17.07, inclusive.
F5	The option is fully vested and exercisable.

Remarks:

Senior Vice President, Manufacturing of ACM Research (Shanghai), Inc., a subsidiary of the Issuer.