Form 8-K

8-K — ACM Research, Inc.

Accession: 0001628280-26-027353

Filed: 2026-04-27

Period: 2026-04-27

CIK: 0001680062

SIC: 3559 (SPECIAL INDUSTRY MACHINERY, NEC)

Item: Results of Operations and Financial Condition

Item: Financial Statements and Exhibits

Documents

8-K — acmr-20260427.htm (Primary)

EX-99.1 (a427_acmrprelimq12026reven.htm)

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8-K

8-K (Primary)

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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 27, 2026

ACM Research, Inc.

(Exact Name of Registrant as Specified in its Charter)

Delaware 001-38273 94-3290283

(State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification No.)

42307 Osgood Road, Suite I

Fremont, California

94539

(Address of Principal Executive Offices) (Zip Code)

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:

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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

Title of each class Trading symbol Name of each exchange on which registered

Class A Common Stock, par value $0.0001 per share ACMR The Nasdaq Stock Market LLC

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 2.02 Results of Operations and Financial Condition.

On April 27, 2026, we issued a press release entitled “ACM Research Announces Preliminary Unaudited Revenue and Shipments for the First Quarter 2026.” The full text of the press release is furnished as Exhibit 99.1 hereto and is incorporated herein by reference.

The information contained in this Item 2.02, including the exhibit furnished hereto, is intended to be furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934 or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, or the Securities Exchange Act of 1934, except as expressly set forth by specific reference in such filing.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

Exhibit Description

99.1

104

Press Release of ACM Research, Inc. dated April 27, 2026

Cover Page Interactive Data File (embedded within the XBRL document)

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.

ACM RESEARCH, INC.

By: /s/ Mark McKechnie________________________

Mark McKechnie

Chief Financial Officer and Treasurer

Dated: April 27, 2026

EX-99.1

Filename: a427_acmrprelimq12026reven.htm · Sequence: 2

Document

ACM Research Announces Preliminary Unaudited Revenue

and Shipments for the First Quarter 2026

Coincides with Release of ACM Shanghai First Quarter 2026 Results

ACM Reaffirms 2026 Revenue Outlook

FREMONT, Calif., April 27, 2026 (GLOBE NEWSWIRE) – ACM Research, Inc. (“ACM”) (NASDAQ: ACMR), a leading supplier of wafer processing solutions for semiconductor and advanced wafer-level packaging applications, today announced expectations for preliminary unaudited revenue and total shipments for the first quarter of 2026. Today’s release coincides with the as-scheduled release of unaudited financial results by ACM Research (Shanghai), Inc., ACM’s principal operating subsidiary (“ACM Shanghai”), to the Shanghai Stock Exchange website [link to China Disclosure].

ACM will discuss its full financial results for the first quarter 2026 and its revenue outlook for the remainder of the year on its earnings call on Thursday, May 7, 2026, at 8 a.m. Eastern Time (8 p.m. China Time).

ACM announces the following:

•preliminary unaudited revenue for the first quarter of 2026 is expected to be in the range of $225 million to $230 million, which would represent year-to-year growth of 31% to 33%.

•preliminary total shipments for the first quarter of 2026 are expected to be in the range of $233 million to $238 million, which would represent year-to-year growth of 49% to 52%.

•re-affirms full year 2026 revenue outlook in the range of $1.08 billion to $1.175 billion, which would represent year-to-year growth of 20% to 30%.

Actual unaudited first quarter 2026 results are subject to the completion of ACM’s quarter end closing procedures and review by ACM’s independent registered public accounting firm.

ACM currently owns an approximately 74% equity interest in ACM Shanghai, and a substantial majority of ACM’s consolidated revenue and net income is contributed by ACM Shanghai. The stand-alone financial results of ACM Shanghai are reported in RMB as prepared in accordance with Chinese generally accepted accounting principles, and those results will differ, potentially materially, from ACM’s consolidated revenue and net profit for the period, which will reflect additional financial and operational items and will be prepared in U.S. dollars in accordance with U.S. generally accepted accounting principles.

About ACM Research, Inc.

ACM develops, manufactures and sells semiconductor process equipment spanning cleaning, electroplating, stress-free polishing, vertical furnace processes, track, PECVD, and wafer- and panel-level packaging tools, enabling advanced and semi-critical semiconductor device manufacturing. ACM is committed to delivering customized, high-performance, cost-effective process solutions that semiconductor manufacturers can use in numerous manufacturing steps to improve productivity and product yield. For more information, visit www.acmr.com.

Forward-Looking Statements

Internal

Certain statements contained in this press release are not historical facts and may be forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Words such as “plans,” “expects,” “believes,” “anticipates,” “designed,” and similar words are intended to identify forward-looking statements. Forward-looking statements are based on ACM 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. A description of certain of these risks, uncertainties and other matters can be found in filings ACM makes with the U.S. Securities and Exchange Commission, all of which are available at www.sec.gov. Because forward-looking statements involve risks and uncertainties, actual results and events may differ materially from results and events currently expected by ACM. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof. ACM 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.

© ACM Research, Inc. The ACM Research logo is a trademark of ACM Research, Inc. For convenience, this trademark appears in this press release without a ™ symbol, but that practice does not mean that ACM will not assert, to the fullest extent under applicable law, its rights to such trademark.

For investor and media inquiries, please contact:

In the United States: The Blueshirt Group

Steven C. Pelayo, CFA

+1 (360) 808-5154

steven@blueshirtgroup.co

In China: The Blueshirt Group Asia

Gary Dvorchak, CFA

+86 (138) 1079-1480

gary@blueshirtgroup.co

Internal

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