ACMR: Rule 144 Notice for Common Shares

ACMR filed a Rule 144 notice reporting recent dispositions of Common Stock and a related option exercise.

Rhea-AI Filing Summary

ACMR filed a Rule 144 notice reporting recent dispositions of Common Stock and a related option exercise. The filing lists three past sales by Hui Wang: 60,000 shares on 06/03/2026, 50,000 shares on 03/12/2026, and 60,000 shares on 03/11/2026 with dollar amounts shown. It also lists a stock option exercise on 06/04/2026 for 40,002 shares classified as ISSUER and paid in cash.

Insights

Securities Compliance Attorney

Rule 144 notice documents recent insider dispositions and an issuer-side option exercise.

The filing records specific sale transactions by a reporting holder (Hui Wang) and an issuer-classified stock option exercise of 40,002 shares on 06/04/2026. This is a disclosure of transfers under resale restrictions rather than a corporate action.

Timing and cash-flow recipients are stated in the entries; the filing does not present new operational or financial performance data. Subsequent filings may provide additional context if required.

Key Figures

Stock option exercise: 40,002 shares Sale on 06/03/2026: 60,000 shares Sale on 03/12/2026: 50,000 shares +1 more

4 metrics

Stock option exercise 40,002 shares 06/04/2026, classified as ISSUER, paid in Cash

Sale on 06/03/2026 60,000 shares Sale date 06/03/2026; proceeds shown as 5,403,084.00

Sale on 03/12/2026 50,000 shares Sale date 03/12/2026; proceeds shown as 2,278,825.00

Sale on 03/11/2026 60,000 shares Sale date 03/11/2026; proceeds shown as 2,875,386.00

Key Terms

Rule 144, Stock Option Exercise, ISSUER

3 terms

Rule 144 regulatory

"144: Securities To Be Sold"

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.

Stock Option Exercise financial

"Common | 06/04/2026 | Stock Option Exercise"

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.

ISSUER regulatory

"Stock Option Exercise | ISSUER | 40002"

FAQ

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

What does ACMR's Rule 144 filing report?

The filing reports recent dispositions of Common Stock and an option exercise. It lists three sales by Hui Wang (60,000; 50,000; 60,000 shares) and a stock option exercise for 40,002 shares on 06/04/2026.

Who sold shares according to the ACMR Rule 144 notice?

The filing identifies Hui Wang as the seller in three transactions. The listed sale dates and shares are 03/11/2026 (60,000), 03/12/2026 (50,000), and 06/03/2026 (60,000), with corresponding dollar amounts shown in the entries.

What is the 06/04/2026 stock option exercise in the ACMR filing?

The filing records a stock option exercise on 06/04/2026 for 40,002 shares described as 'ISSUER' and paid in cash. The entry is shown under 'Securities To Be Sold' as a stock option exercise.

Does this Rule 144 filing change ACMR's financial results or guidance?

No financial results or guidance are included. The filing solely discloses resale activity and an option exercise; it does not contain operating metrics, revenue figures, or forward guidance affecting company performance.

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

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Accepted by SEC EDGAR 06/04/2026 - 04:11 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	40002	3432315.61	61233064	06/04/2026	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	06/04/2026	Stock Option Exercise	ISSUER			40002	06/04/2026	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	06/03/2026	60000	5403084.00
HUI WANG 42307 Osgood Road, Suite I Fremont CA 94539	Common	03/12/2026	50000	2278825.00
HUI WANG 42307 Osgood Road, Suite I Fremont CA 94539	Common	03/11/2026	60000	2875386.00

144: Remarks and Signature

Remarks
Date of Notice	06/04/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	11/29/2024
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)