Results of Operations and Financial Condition. On August 7, 2026, we issued a press release announcing financial results for the second 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…

Other Events. As previously disclosed, on May 12, 2026, ACM Research, Inc. (the “Company”) entered into a Securities Purchase Agreement (the “Purchase Agreement”) with certain investors named therein (the “Investors”). Pursuant to the Purchase Agreement, the Company agreed to issue and sell to the Investors in a registered direct offering (the “Offering”) an aggregate of 2,884,615 shares (the “Shares”) of Class A common stock, par value $0.0001 per share (“Common Stock”) at an offering price…

Entry Into a Material Definitive Agreement. On May 12, 2026, ACM Research, Inc. (the “Company”) entered into a Securities Purchase Agreement (the “Purchase Agreement”) with certain U.S. institutional investors named therein managed by Tekne Capital Management, LLC (the “Investors”). Pursuant to the Purchase Agreement, the Company agreed to issue and sell to the Investors in a registered direct offering (the “Offering”) an aggregate of 2,884,615 shares (the “Shares”) of Class A common stock, p…

Results of Operations and Financial Condition. On May 7, 2026, we issued a press release announcing financial results for the first 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…

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 Securiti…

Other Events. The shares of the operating subsidiary of ACM Research, Inc. (the “Company”), ACM Research (Shanghai), Inc. (“ACM Shanghai”), are listed on the Sci-Tech innovation board of the Shanghai Stock Exchange. On February 27, 2026, ACM Shanghai issued an announcement (the “Announcement”) regarding its proposed profit distribution plan for fiscal year 2025 (the “Plan”). Pursuant to the Plan, a cash dividend of RMB 6.233 per 10 shares (inclusive of tax) will be distributed, no bonus share…

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 Exchan…

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 E…

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 subjec…

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 Securi…

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…

Other Events. On June 12, 2025, the primary operating subsidiary of ACM Research, Inc. (the “Company”), ACM Research (Shanghai), Inc. (“ACM Shanghai”), held its Annual Stockholder Meeting in Shanghai, China. During this meeting, the stockholders of ACM Shanghai approved and adopted various resolutions, including the following: 1) a proposed dividend to be paid to the stockholders of ACM Shanghai for an aggregate total of approximately RMB 288.3 million (approximately $40.1 million based on cu…

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…

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 Securiti…

Director — Chenming C. Hu: The filing discloses a director's decision not to stand for reelection at the upcoming annual meeting, which is a routine board composition change rather than a sudden executive departure.

Director — Charles Pappis: The filing discloses the appointment of a new director to the Board and Audit Committee, which is a routine governance event rather than an executive departure.

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 Exchan…

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 E…

Director — Xiao Xing: A director resigned from the board and audit committee without any stated disagreement, representing a standard departure of a board member.

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 subjec…

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 Securi…

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…

Other Events. On June 18, 2024, the primary operating subsidiary of ACM Research, Inc. (the “Company”), ACM Research (Shanghai), Inc. (“ACM Shanghai”), held its Annual Stockholder Meeting in Shanghai, China. During this meeting, the stockholders of ACM Shanghai approved and adopted various resolutions, including the following: 1) a proposed dividend to be paid to the stockholders of ACM Shanghai for an aggregate total of approximately RMB 273.2 million (approximately $37.7 million based on cu…

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…

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 Securiti…