ACM Research (ACMR) exec plans 55K-share sale in 2026

Rhea-AI Filing Summary

ACM Research, Inc. (ACMR) received a notice that officer Mark A. McKechnie plans to sell ACMR common stock under Rule 144. The filing indicates a proposed sale of up to 55,199 shares of common stock on or about 08/20/2026, following a stock option exercise for cash, through Morgan Stanley Smith Barney LLC.

Key Figures

Shares proposed to be sold: 55,199 shares of common stock Proposed sale date: 08/20/2026 Form type: Form 144

3 metrics

Shares proposed to be sold 55,199 shares of common stock Planned Rule 144 sale by officer Mark A. McKechnie

Proposed sale date 08/20/2026 Date listed for Rule 144 sale of ACM Research, Inc. common stock

Form type Form 144 Notice of proposed sale of ACM Research, Inc. securities

Key Terms

Rule 144, stock option exercise, Executive Financial Services

3 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.

stock option exercise financial

"Common | 08/20/2026 | 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.

Executive Financial Services financial

"Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza"

FAQ

What does ACMR’s latest Form 144 filing disclose?

It discloses that officer Mark A. McKechnie plans to sell ACM Research, Inc. common stock under Rule 144, with the shares to be sold following a stock option exercise for cash through Morgan Stanley Smith Barney LLC.

How many ACMR shares are proposed to be sold in this Form 144?

The notice states a proposed sale of up to 55,199 shares of ACM Research, Inc. common stock under Rule 144.

When is the proposed sale date for the ACMR shares under this Form 144?

The filing lists a proposed sale date of 08/20/2026 for the ACM Research, Inc. common stock to be sold under Rule 144.

How will the ACMR shares be obtained for the Rule 144 sale?

The Form 144 indicates the shares will come from a stock option exercise, with the exercise consideration paid in cash to the issuer.

Which broker is handling the planned ACMR Rule 144 sale?

The broker named is Morgan Stanley Smith Barney LLC, Executive Financial Services, which is listed as handling the common stock for the proposed Rule 144 sale.

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

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Available on EDGAR 08/20/2026 - 04:03 PM Accepted by SEC EDGAR 08/20/2026 - 04:02 PM 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	0001775007
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	MARK A MCKECHNIE
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

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	55199	4264867.94	64657388	08/20/2026	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	08/20/2026	Stock Option Exercise	Issuer			55199	08/20/2026	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

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	08/20/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	05/21/2026
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/ Mark Allen McKechnie
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)