ACM Research holder Hui Wang may sell 70,000 shares

ACM Research, Inc. (ACMR) is named in a notice under Rule 144 that a security holder, Hui Wang, may sell up to 70,000 shares of its common stock through Morgan Stanley Smith Barney LLC.

Rhea-AI Filing Summary

ACM Research, Inc. (ACMR) is named in a notice under Rule 144 that a security holder, Hui Wang, may sell up to 70,000 shares of its common stock through Morgan Stanley Smith Barney LLC. The shares relate to a stock option exercise for cash dated September 9, 2026, and Hui Wang also reports having sold 70,000 shares of common stock during the prior three months.

Key Figures

Shares to be sold: 70,000 shares Aggregate market value of planned sale: $5,221,482 Shares outstanding: 64,657,388 shares +3 more

6 metrics

Shares to be sold 70,000 shares Maximum ACM Research, Inc. common shares covered by the Rule 144 notice

Aggregate market value of planned sale $5,221,482 Referenced value for the 70,000 ACM Research, Inc. shares to be sold

Shares outstanding 64,657,388 shares ACM Research, Inc. common shares outstanding referenced in the filing

Shares sold in past 3 months 70,000 shares ACM Research, Inc. common shares sold by Hui Wang on September 8, 2026

Aggregate sale price of prior sale $5,408,522 Total price for 70,000 ACM Research, Inc. shares sold on September 8, 2026

Approximate date of proposed sale September 9, 2026 Date associated with proposed Rule 144 sale and stock option exercise

Key Terms

Rule 144, aggregate market value, Stock Option Exercise, securities to be sold

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

aggregate market value financial

"70000 | 5221482.00 | 64657388 | 09/09/2026 | NASDAQ"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

Stock Option Exercise financial

"Common | 09/09/2026 | Stock Option Exercise | Issuer"

A stock option exercise is the act of using a previously granted right to buy shares of a company's stock at a specific, predetermined price by paying that price and receiving the shares. It matters to investors because exercising changes who owns the shares (which can dilute existing ownership), can trigger taxable events and shift potential gains or losses, and affects voting power and the company’s outstanding share count—like turning a voucher into an actual product that becomes part of circulating supply.

securities to be sold financial

"144: Securities To Be Sold"

FAQ

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

What does the Form 144 filing disclose for ACMR?

It discloses that Hui Wang has given notice under Rule 144 to potentially sell up to 70,000 shares of ACM Research, Inc. common stock through Morgan Stanley Smith Barney LLC, with the shares tied to a stock option exercise for cash dated September 9, 2026.

How many ACMR shares are covered by the planned Rule 144 sale?

The notice covers up to 70,000 shares of ACM Research, Inc. common stock, with an aggregate market value of $5,221,482 as referenced in the filing.

What prior ACMR share sales by Hui Wang are reported in this Form 144?

Hui Wang reports having sold 70,000 shares of ACM Research, Inc. common stock on September 8, 2026, for an aggregate sale price of $5,408,522 during the past three months.

How many ACMR shares are outstanding as referenced in the Form 144?

The filing references 64,657,388 shares of ACM Research, Inc. common stock outstanding in connection with the Rule 144 notice for the proposed sale.

What is the source and method of acquisition for the ACMR shares in this Form 144?

The shares to be sold are associated with a stock option exercise from the issuer, with the filing stating the method of exercise as cash on September 9, 2026.

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

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Available on EDGAR 09/09/2026 - 04:38 PM EDT Accepted by SEC EDGAR 09/09/2026 - 04:38 PM EDT Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001721580
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	ACM RESEARCH, INC.
SEC File Number	001-38273
Address of Issuer	42307 Osgood Road, Suite I Fremont CALIFORNIA 94539
Phone	(510) 445-3700
Name of Person for Whose Account the Securities are To Be Sold	HUI WANG
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer
Relationship to Issuer	Director
Relationship to Issuer	10% Stockholder

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	70000	5221482.00	64657388	09/09/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	09/09/2026	Stock Option Exercise	Issuer			70000	09/09/2026	Cash

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
HUI WANG 42307 Osgood Road, Suite I Fremont CA 94539	Common	09/08/2026	70000	5408522.00

144: Remarks and Signature

Remarks
Date of Notice	09/09/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	06/05/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Hui Wang
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)