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): June 1018, 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 58.0701 ~~Submission~~Other ~~of Matters to a Vote of Security Holders~~Events.

WeThe ~~held~~shares of our ~~2026~~operating ~~Annual~~subsidiary ~~Meeting~~ACM ofResearch ~~Stockholders~~(Shanghai), onInc. ~~June~~(“ACM ~~10,~~Shanghai”) ~~2026.~~are ~~The~~listed on the Sci-Tech innovation board (the “STAR Market”) of ~~directors~~the ~~solicited~~Shanghai ~~proxies~~Stock ~~pursuant~~Exchange to(the a“SSE”). ~~proxy~~In ~~statement~~accordance ~~that~~with wethe SSE’s rules governing the STAR Market, ACM Shanghai filed with the ~~Securities~~SSE ~~and~~a ~~Exchange~~Record ~~Commission~~of ~~under~~June ~~Section~~2026 14Investor Relations Activity (athe “Record”). ofThe SSE posted the ~~Securities~~Record ~~Exchange~~to ~~Act~~the ofSSE’s ~~1934~~website on ~~April~~June 2718, 2026. ~~There~~A ~~was~~copy noof ~~solicitation~~the inRecord ~~opposition~~is toattached ~~the~~as ~~board’s~~Exhibit ~~solicitation~~99.1 hereto.

AtThe ~~the~~information ~~meeting,~~in ~~holders~~this ofCurrent ~~Class~~Report Aon ~~and~~Form ~~Class~~8-K, Bincluding ~~common~~Exhibit ~~stock~~99.1, ~~were~~is ~~asked~~intended to ~~consider~~be furnished and ~~vote~~shall ~~upon~~not ~~the~~be ~~two~~deemed ~~proposals~~“filed” ~~set~~for ~~forth~~purposes ~~below.~~of ~~Each~~Section ~~share~~18 of ~~Class~~the ASecurities ~~common~~Exchange ~~stock~~Act ~~was~~of ~~entitled~~1934, toas ~~one~~amended, ~~vote~~or ~~with~~otherwise ~~respect~~subject to ~~each matter submitted to a vote at~~ the ~~meeting,~~liabilities ~~and each share~~ of ~~Class~~that BSection, ~~common~~nor ~~stock~~shall ~~was~~it ~~entitled~~be todeemed ~~twenty votes with respect~~ to ~~each~~be ~~matter~~incorporated ~~submitted~~by toreference ainto ~~vote~~any atfiling ~~the meeting. Shares~~ of ~~Class~~ACM ~~A and Class B common stock representing 135~~Research,~~814,497~~ ~~votes, or 84~~Inc.~~32%~~ ofunder the ~~total~~Securities ~~votes~~Act ~~attributable to all outstanding shares~~ of ~~Class A and Class B common stock~~1933, ~~were~~as ~~present in person or by proxy at the meeting~~amended.

~~The~~Item ~~voting~~9.01 Financial ~~results~~Statements ~~reported~~and ~~below are final~~Exhibits.

~~The matters considered and voted on by the stockholders at the meeting and the votes of the stockholders were as follows:~~(d) Exhibits.

Proposal 1. Stockholders voted as follows with respect to the election of each of the nominees for director identified in the proxy statement:


Exhibit						Description
99.1* 104						Record of June 2026 Investor Relations Activity filed by ACM Research (Shanghai), Inc. with the Shanghai Stock Exchange on June 18, 2026 Cover Page Interactive Data File (embedded within the XBRL document)

Nominee	For	Withhold	Broker Non-Votes
David H. Wang	122,956,333	6,072,472	6,785,692
Haiping Dun	125,995,407	3,033,398	6,785,692
Tracy Liu	121,026,446	8,002,359	6,785,692
Charles Pappis	117,316,569	11,712,236	6,785,692

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

As a result of this vote, each of the four nominees was elected as a director to serve until the 2027 Annual Meeting of Stockholders and until his or her successor is duly elected and qualified.

Proposal 2. Stockholders ratified the appointment of Ernst & Young Hua Ming LLP as our independent auditor for the fiscal year ending December 31, 2026 by the following vote:

			For			Against			Abstain
Ratification of Appointment of Ernst & Young Hua Ming LLP for 2026			135,717,653			40,635			56,209

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: June 1222, 2026

Filing Compare · ACM Research, Inc.