ACM Research grants director options, 728 RSUs

ACM Research, Inc. (ACMR) reported that director Tracy Liu received equity compensation awards.

Rhea-AI Filing Summary

ACM Research, Inc. (ACMR) reported that director Tracy Liu received equity compensation awards. On 2026-08-12, Liu was granted stock options for 6,400 shares of Class A common stock at an exercise price of $81.26 per share, expiring on 2036-08-11. These options will vest and become exercisable immediately prior to the 2027 annual meeting of stockholders, subject to continued service through the vesting date.

On the same date, Liu was also granted 728 restricted stock units, each representing one share of Class A common stock. The price per restricted stock unit is based on the average closing market price of $96.13 for the issuer's common stock over the 30 trading days preceding the grant date. These restricted stock units are scheduled to vest immediately prior to the 2027 annual meeting of stockholders, subject to continued service.

Insider Trade Summary

Grant/Award: 7,128 shares

Grant/Award 2 txns

Insider Liu Tracy

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Stock Option F1	6,400	$0.00	$0.00
Grant/Award	Restricted Stock Units F2, F3	728	$0.00	$0.00

Holdings After Transaction: Stock Option — 6,400 contracts (Direct); Restricted Stock Units — 728 contracts (Direct)

Footnotes (3)

1. F1. The option will vest and become exercisable immediately prior to the 2027 annual meeting of stockholders of the issuer, subject to continued service through the vesting date.
2. F2. The price per restricted stock unit is based on the average closing market price of the Issuer's common stock for the 30 trading days preceding the grant day.
3. F3. The restricted stock units should be vested immediately prior to the 2027 annual meeting of stockholders of the issuer, subject to continued service.

Key Figures

Stock options granted: 6,400 shares Option exercise price: $81.26 per share Option expiration date: 2036-08-11 +3 more

6 metrics

Stock options granted 6,400 shares Stock option grant to director on 2026-08-12

Option exercise price $81.26 per share Exercise price for 6,400-share stock option grant

Option expiration date 2036-08-11 Expiration date of stock option grant

Restricted stock units granted 728 units RSU grant to director on 2026-08-12

RSU pricing reference $96.13 per unit Average closing market price over 30 trading days preceding grant

Vesting event Immediately prior to 2027 annual meeting Vesting timing for both option and RSU awards, subject to continued service

Key Terms

Stock Option, Restricted Stock Units, exercise price, vesting, +1 more

5 terms

Stock Option financial

"The option will vest and become exercisable immediately prior to the 2027 annual"

A stock option is a contract that gives you the right to buy or sell a company's stock at a specific price within a certain time frame. People use them to potentially make money if the stock's price moves favorably or to protect against losses. It's like holding a coupon that can be used to buy or sell stock at a set price later on.

Restricted Stock Units financial

"The restricted stock units should be vested immediately prior to the 2027 annual"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

exercise price financial

"conversion_or_exercise_price": "81.2600""

The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.

vesting financial

"subject to continued service through the vesting date."

Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

annual meeting of stockholders regulatory

"immediately prior to the 2027 annual meeting of stockholders of the issuer"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What equity awards did ACMR director Tracy Liu receive in this Form 4?

Tracy Liu received a stock option for 6,400 shares of Class A common stock with an exercise price of $81.26 per share, expiring 2036-08-11, and 728 restricted stock units, all granted on 2026-08-12 as director compensation.

When do Tracy Liu’s new ACMR stock options vest?

The 6,400-share stock option grant to Tracy Liu will vest and become exercisable immediately prior to the 2027 annual meeting of stockholders, subject to Liu’s continued service through the vesting date.

When do Tracy Liu’s ACMR restricted stock units vest?

The 728 restricted stock units granted to Tracy Liu are expected to vest immediately prior to the 2027 annual meeting of stockholders, subject to continued service, as described in the filing footnotes.

What is the exercise price and expiration date of Tracy Liu’s ACMR stock options?

The stock options granted to Tracy Liu have an exercise price of $81.26 per share and an expiration date of 2036-08-11, with a total of 6,400 underlying shares of Class A common stock.

How was the price per ACMR restricted stock unit for Tracy Liu determined?

The price per restricted stock unit for Tracy Liu’s award is based on the average closing market price of $96.13 for ACM Research’s common stock over the 30 trading days preceding the grant date.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Available on EDGAR 08/26/2026 - 09:30 PM EDT Accepted by SEC EDGAR 08/26/2026 - 09:30 PM EDT Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a 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). See Instruction 10.

1. Name and Address of Reporting Person^*

Liu Tracy

(Last) (First) (Middle)

C/O ACM RESEARCH, INC.

42307 OSGOOD ROAD, SUITE I

(Street)

FREMONT CALIFORNIA 94539

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
ACM Research, Inc. [ ACMR ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/12/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option	$81.26	08/12/2026		A		6,400		(1)	08/11/2036	Class A Common Stock	6,400	$0	6,400	D
Restricted Stock Units	$96.13(2)	08/12/2026		A		728		(3)	(3)	Class A Common Stock	728	$0	728	D

Explanation of Responses:

1. The option will vest and become exercisable immediately prior to the 2027 annual meeting of stockholders of the issuer, subject to continued service through the vesting date.

2. The price per restricted stock unit is based on the average closing market price of the Issuer's common stock for the 30 trading days preceding the grant day.

3. The restricted stock units should be vested immediately prior to the 2027 annual meeting of stockholders of the issuer, subject to continued service.

	/s/ Mark McKechnie, Attorney-in-Fact for Tracy Liu	08/26/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)