8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): April 10, 2023

ACM Research, Inc.

(Exact Name of Registrant as Specified in its Charter)

Registrant’s telephone number, including area code: (510) 445-3700

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 or Rule 12b-2 of the Securities Exchange Act of 1934: Emerging growth company o

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 8.01 Other Events.

The shares of our operating subsidiary ACM Research (Shanghai), Inc., or ACM Shanghai, are listed on the Sci-Tech innovation board, or the STAR Market, of the Shanghai Stock Exchange, or the SSE.

In accordance with the SSE’s rules governing the STAR Market, ACM Shanghai filed with the SSE a Record of March 2023 Investor Relations Activity, or the Record. The SSE posted the Record to the SSE’s website on April 10, 2023. A copy of the Record is included as exhibit 99.01 to this report.

Item 9.01 Financial Statements and Exhibits.

(d)Exhibits.

*Unofficial English translation of original document prepared in Mandarin Chinese.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, hereunto duly authorized.

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Document

Stock Code: 688082 Short Name: ACMSH

ACM Research (Shanghai), Inc.

Records of Investor Relation Activities in March 2023

Enclosure: List of Participants

*    *    *

The following information is provided in connection with the furnishing of the above Record of March 2023 Investor Relation Activity of ACM Research (Shanghai), Inc. (“ACMSH”) (the “Record”) pursuant to the Current Report on Form 8-K reporting requirements of ACM Research, Inc.:

Forward-Looking Statements

Information presented in the Record includes forward-looking statements for purposes of the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. All statements contained in the Record that do not relate to matters of historical fact should be considered forward-looking statements. Forward-looking statements are based on ACMSH management’s current expectations and beliefs, and involve a number of risks and uncertainties that are difficult to predict and that could cause actual results to differ materially from those stated or implied by the forward-looking statements. Those risks and uncertainties include, but are not limited to, the following, any of which could be exacerbated even further by the continuing COVID-19 outbreak in China and globally: anticipated customer orders or identified market opportunities may not grow or develop as anticipated; customer orders already received may be postponed or canceled; ACMSH may be unable to obtain the qualification and acceptance of its delivered tools when anticipated or at all, which would delay or preclude ACMSH’s recognition of revenue from the sale of those tools; suppliers may not be able to meet ACMSH’s demands on a timely basis; ACMSH’s technologies and tools may not gain market acceptance; ACMSH may be unable to compete effectively by, among other things, enhancing its existing tools, adding additional production capacity and engaging additional major customers; ACMSH may incur significant expenses long before it can recognize revenue from new products, if at all, due to the costs and length of research, development, manufacturing and customer evaluation process cycles; volatile global economic, market, industry and other conditions could result in sharply lower demand for products containing semiconductors and for ACMSH’s products and in disruption of capital and credit markets; ACMSH’s failure to successfully manage its operations, including its inability to hire, train, integrate and manage additional qualified engineers for research and development activities; and trade regulations, including those recently published by the U.S. Department of Commerce imposing certain restrictions on equipment shipments and business practices with China-based semiconductor manufacturers, currency fluctuations, political instability and war, all of which may materially adversely affect ACMSH due to its substantial non-U.S. customer and supplier base and its substantial non-U.S. manufacturing operations. A further description of these risks, uncertainties and other matters can be found in filings ACM Research, Inc. makes with the U.S. Securities and Exchange Commission. Because forward-looking statements involve risks and uncertainties, actual results and events may differ materially from results and events currently expected by ACMSH. ACMSH undertakes no obligation to publicly update these forward-looking statements to reflect events or circumstances that occur after the date hereof or to reflect any change in its expectations with regard to these forward-looking statements or the occurrence of unanticipated events.