ACMR

acmr-20261105

false000168006200016800622026-11-052026-11-05

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): November 5, 2026

ACM Research, Inc.

(Exact Name of Registrant as Specified in its Charter)

Delaware001-3827394-3290283

(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:

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

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

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

oPre-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 classTrading symbolName of each exchange on which registered

Class A Common Stock, par value $0.0001 per shareACMRThe 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 November 5, 2026, we issued a press release announcing financial results for the third quarter of 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.

ExhibitDescription

99.1

104

Press Release of ACM Research, Inc. dated November 5, 2026

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

2

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: November 5, 2026

3

acmr-20261028

false000168006200016800622026-10-282026-10-28

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): October 28, 2026

ACM Research, Inc.

(Exact Name of Registrant as Specified in its Charter)

Delaware001-3827394-3290283

(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:

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

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

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

oPre-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 classTrading symbolName of each exchange on which registered

Class A Common Stock, par value $0.0001 per shareACMRThe 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 October 28, 2026, we issued a press release entitled “ACM Research Announces Preliminary Unaudited Revenue and Shipments for the Third 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.

ExhibitDescription

99.1

104

Press Release of ACM Research, Inc. dated October 28, 2026

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

2

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: October 28, 2026

3

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Internet Security Policy

By using this site, you are agreeing to security monitoring and auditing. For security purposes, and to ensure that the public service remains available to users, this government computer system employs programs to monitor network traffic to identify unauthorized attempts to upload or change information or to otherwise cause damage, including attempts to deny service to users.

Unauthorized attempts to upload information and/or change information on any portion of this site are strictly prohibited and are subject to prosecution under the Computer Fraud and Abuse Act of 1986 and the National Information Infrastructure Protection Act of 1996 (see Title 18 U.S.C. §§ 1001 and 1030).

To ensure our website performs well for all users, the SEC monitors the frequency of requests for SEC.gov content to ensure automated searches do not impact the ability of others to access SEC.gov content. We reserve the right to block IP addresses that submit excessive requests. Current guidelines limit users to a total of no more than 10 requests per second, regardless of the number of machines used to submit requests.

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Internet Security Policy

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Unauthorized attempts to upload information and/or change information on any portion of this site are strictly prohibited and are subject to prosecution under the Computer Fraud and Abuse Act of 1986 and the National Information Infrastructure Protection Act of 1996 (see Title 18 U.S.C. §§ 1001 and 1030).

To ensure our website performs well for all users, the SEC monitors the frequency of requests for SEC.gov content to ensure automated searches do not impact the ability of others to access SEC.gov content. We reserve the right to block IP addresses that submit excessive requests. Current guidelines limit users to a total of no more than 10 requests per second, regardless of the number of machines used to submit requests.

If a user or application submits more than 10 requests per second, further requests from the IP address(es) may be limited for a brief period. Once the rate of requests has dropped below the threshold for 10 minutes, the user may resume accessing content on SEC.gov. This SEC practice is designed to limit excessive automated searches on SEC.gov and is not intended or expected to impact individuals browsing the SEC.gov website.

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acmr-20260225false000168006200016800622026-02-262026-02-26

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): February 26, 2026 ACM Research, Inc. (Exact Name of Registrant as Specified in its Charter)

Delaware001-3827394-3290283 (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:

oWritten communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) oSoliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) oPre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) oPre-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 classTrading symbolName of each exchange on which registered Class A Common Stock, par value $0.0001 per shareACMRThe 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 February 26, 2026, we issued a press release announcing financial results for the fourth quarter and fiscal year ended December 31, 2025. 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 February 26, 2026 Cover Page Interactive Data File (embedded within the XBRL document)

2

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: February 26, 2026 3

acmr-20260122false000168006200016800622026-01-222026-01-22

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): January 22, 2026 ACM Research, Inc. (Exact Name of Registrant as Specified in its Charter)

Delaware001-3827394-3290283 (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:

oWritten communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) oSoliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) oPre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) oPre-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 classTrading symbolName of each exchange on which registered Class A Common Stock, par value $0.0001 per shareACMRThe 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 January 22, 2026, we issued a press release entitled “ACM Research Updates 2025 Revenue Outlook and Provides Initial Outlook for 2026 Revenue.” 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 January 22, 2026 Cover Page Interactive Data File (embedded within the XBRL document)

2

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: January 22, 2026 3

acmr-20251105false000168006200016800622025-11-052025-11-05

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): November 5, 2025 ACM Research, Inc. (Exact Name of Registrant as Specified in its Charter)

Delaware001-3827394-3290283 (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:

oWritten communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) oSoliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) oPre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) oPre-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 classTrading symbolName of each exchange on which registered Class A Common Stock, par value $0.0001 per shareACMRThe 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 November 5, 2025, we issued a press release announcing financial results for the third quarter of 2025. 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 November 5, 2025 Cover Page Interactive Data File (embedded within the XBRL document)

2

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: November 5, 2025 3

acmr-20251029false000168006200016800622025-10-292025-10-29

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): October 29, 2025 ACM Research, Inc. (Exact Name of Registrant as Specified in its Charter)

Delaware001-3827394-3290283 (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:

oWritten communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) oSoliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) oPre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) oPre-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 classTrading symbolName of each exchange on which registered Class A Common Stock, par value $0.0001 per shareACMRThe 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 October 29, 2025, we issued a press release entitled “ACM Research Announces Preliminary Unaudited Revenue and Shipments for the Third Quarter 2025.” 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 October 29, 2025 Cover Page Interactive Data File (embedded within the XBRL document)

2

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: October 29, 2025 3

false0001680062NASDAQ00016800622025-08-062025-08-06

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): August 6, 2025

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:

☐

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

☐

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

☐

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

☐

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  ☐

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.         ☐

Item 2.02.

Results of Operations and Financial Condition.

On August 6, 2025, we issued a press release announcing financial results for the second quarter of 2025. 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

Press Release of ACM Research, Inc. dated August 6, 2025

104

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

2

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: August 6, 2025

3

false000168006200016800622025-05-082025-05-08

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): May 8, 2025

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:

☐

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

☐

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

☐

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

☐

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  ☐

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.             ☐

Item 2.02.

Results of Operations and Financial Condition.

On May 8, 2025, we issued a press release announcing financial results for the first quarter of 2025. 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

Press Release of ACM Research, Inc. dated May 8, 2025

104

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

2

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: May 8, 2025

3

false000168006200016800622025-04-292025-04-29

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 29, 2025

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:

☐

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

☐

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

☐

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

☐

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

NASDAQ

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  ☐

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. ☐

Item 2.02

Results of Operations and Financial Condition.

On April 29, 2025, we issued a press release entitled “ACM Research Announces Preliminary Unaudited Revenue and Shipments for the First Quarter 2025.” 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

Press Release of ACM Research, Inc. dated April 29, 2025

104

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

2

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 29, 2025

3

false0001680062NASDAQ00016800622025-02-262025-02-26

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): February 26, 2025

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:

☐

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

☐

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

☐

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

☐

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  ☐

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. ☐

Item 2.02.

Results of Operations and Financial Condition.

On February 26, 2025, we issued a press release announcing financial results for the fourth quarter and fiscal year ended December 31, 2024. 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

Press Release of ACM Research, Inc. dated February 26, 2025

104

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

2

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: February 26, 2025

3

false000168006200016800622025-01-142025-01-14

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): January 14, 2025

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:

☐

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

☐

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

☐

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

☐

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  ☐

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. ☐

Item 2.02.

Results of Operations and Financial Condition.

On January 14, 2025, we issued a press release entitled “ACM Research Updates 2024 Revenue Outlook and Provides Initial Outlook for 2025 Revenue.” 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

Press Release of ACM Research, Inc. dated January 14, 2025

104

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

2

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: January 14, 2025

3

false000168006200016800622024-11-072024-11-07

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): November 7, 2024

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:

☐

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

☐

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

☐

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

☐

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  ☐

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.   ☐

Item 2.02.

Results of Operations and Financial Condition.

On November 7, 2024, we issued a press release announcing financial results for the third quarter of 2024. 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

Press Release of ACM Research, Inc. dated November 7, 2024

104

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

2

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: November 7, 2024

3

false000168006200016800622024-10-302024-10-30

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): October 30, 2024

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:

☐

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

☐

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

☐

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

☐

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  ☐

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. ☐

Item 2.02

Results of Operations and Financial Condition.

On October 30, 2024, we issued a press release entitled “ACM Research Announces Preliminary Unaudited Revenue and Shipments for the Third Quarter 2024.” 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

Press Release of ACM Research, Inc. dated October 30, 2024

104

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

2

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: October 30, 2024

3

false0001680062NASDAQ00016800622024-08-072024-08-07

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): August 7, 2024

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:

☐

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

☐

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

☐

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

☐

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  ☐

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. ☐

Item 2.02.

Results of Operations and Financial Condition.

On August 7, 2024, we issued a press release announcing financial results for the second quarter of 2024. 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

Press Release of ACM Research, Inc. dated August 7, 2024

104

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

2

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: August 7, 2024

3

false0001680062FREMONTNASDAQ00016800622024-05-082024-05-08

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): May 8, 2024

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:

☐

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

☐

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

☐

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

☐

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  ☐

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. ☐

Item 2.02.

Results of Operations and Financial Condition.

On May 8, 2024, we issued a press release announcing financial results for the first quarter of 2024. 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

Press Release of ACM Research, Inc. dated May 8, 2024

104

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

2

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: May 8, 2024

3

false0001680062NASDAQ00016800622024-04-262024-04-26

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 26, 2024

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:

☐

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

☐

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

☐

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

☐

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  ☐

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.      ☐

Item 2.02

Results of Operations and Financial Condition.

On April 26, 2024, we issued a press release entitled “ACM Research Announces Preliminary Unaudited Revenue and Shipments for the First Quarter 2024.” 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

Press Release of ACM Research, Inc. dated April 26, 2024

104

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

2

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 26, 2024

3

false000168006200016800622024-02-282024-02-28

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): February 28, 2024

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:

☐

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

☐

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

☐

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

☐

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  ☐

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. ☐

Item 2.02.

Results of Operations and Financial Condition.

On February 28, 2024, we issued a press release announcing financial results for the fourth quarter and fiscal year ended December 31, 2023. 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

Press Release of ACM Research, Inc. dated February 28, 2024

104

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

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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: February 28, 2024

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