6-K

UNITED STATESSECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUERPURSUANT TO RULE 13a-16 OR 15d-16 UNDER THESECURITIES EXCHANGE ACT OF 1934

For the month of September 2025

Commission File Number: 001-34602

DAQO NEW ENERGY CORP.

Unit 29, Huadu Mansion, 838 Zhangyang Road,

Shanghai, 200122

The People’s Republic of China

(+86-21) 5075-2918

(Address of principalexecutive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

EXHIBIT INDEX

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SIGNATURES

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, thereunto duly authorized.

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Exhibit 99.1

Daqo New Energy’s Subsidiary XinjiangDaqo Provides Latest Update on its Litigation Event

Shanghai, China—September 11, 2025—Daqo New Energy Corp. (NYSE: DQ) (“Daqo New Energy,” the “Company” or “we”), a leading manufacturer of high-purity polysilicon for the global solar PV industry, today announced that its subsidiary Xinjiang Daqo has provided an update on a lawsuit.

In April 2024, Xinjiang Daqo New Energy Co., Ltd. (“Xinjiang Daqo”), a subsidiary of Daqo New Energy (the “Company”), received a court summons relating to a contract dispute lawsuit filed against it by Xinjiang Xian’an New Materials Co., Ltd. and its affiliate, Xinjiang Dengbo New Energy Co., Ltd. The plaintiffs previously provided silicon core processing services to Xinjiang Daqo. The plaintiffs requested for termination of the business cooperation agreement with Xinjiang Daqo and for compensation from Xinjiang Daqo for their economic losses totaling RMB1,958.5 million (which was later reduced to RMB742.7 million), which consisted largely of alleged consequential damages of the plaintiffs. This litigation was previously disclosed in the Company’s annual report on Form 20-F for the year ended December 31, 2023 filed with the Securities and Exchange Commission on April 29, 2024, its press release dated July 17, 2024, and its Form 6-K dated March 17, 2025 and Form 6-K dated April 22, 2025.

In July 2024, the Company received the first instance court’s verdict, which affirmed termination of the business cooperation agreement and ordered Xinjiang Daqo to compensate the plaintiffs for their losses and attorney fees totaling RMB3.16 million, while rejecting the plaintiffs’ claims for consequential damages. The plaintiffs appealed to the second instance court. In March 2025, the Company received the second instance court’s verdict, which vacated the decision of the first instance court and remanded the case for a retrial.

Recently, the Company received the verdict of the first instance court’s retrial, which affirmed termination of the business cooperation agreement and ordered Xinjiang Daqo to compensate the plaintiffs for their losses and attorney fees totaling RMB3.30 million, while rejecting the plaintiffs’ claims for consequential damages. The litigation’s impact on Xinjiang Daqo will be contingent upon the final verdict.

About Daqo New Energy Corp.

Daqo New Energy Corp. (NYSE: DQ) (“Daqo” or the “Company”) is a leading manufacturer of high-purity polysilicon for the global solar PV industry. Founded in 2007, the Company manufactures and sells high-purity polysilicon to photovoltaic product manufacturers, who further process the polysilicon into ingots, wafers, cells and modules for solar power solutions. The Company has a total polysilicon nameplate capacity of 305,000 metric tons and is one of the world's lowest cost producers of high-purity polysilicon.

For more information, please visit www.dqsolar.com.

For additional information, please contact:

Daqo New Energy Corp.

Investor Relations

Email: ir@daqo.com

Christensen

In China

Mr. Rene Vanguestaine

Phone: +86 178 1749 0483

Email: rene.vanguestaine@christensencomms.com

In the U.S.

Ms. Linda Bergkamp

Phone: +1 480 614 3004

Email: lbergkamp@christensencomms.com

Safe Harbor Statement

This announcement contains forward-looking statements. These statements are made under the “safe harbor” provisions of the U.S. Private Securities Litigation Reform Act of 1995. These forward-looking statements can be identified by terminology such as “will,” “expects,” “anticipates,” “future,” “intends,” “plans,” “believes,” “estimates,” “might,” “guidance” and similar statements. The Company may also make written or oral forward-looking statements in its reports filed or furnished to the U.S. Securities and Exchange Commission, in its annual reports to shareholders, in press releases and other written materials and in oral statements made by its officers, directors or employees to third parties. Statements that are not historical facts, including statements about the Company’s beliefs and expectations, are forward-looking statements. Forward-looking statements involve inherent risks and uncertainties, all of which are difficult or impossible to predict accurately and many of which are beyond the Company’s control. A number of factors could cause actual results to differ materially from those contained in any forward-looking statement, including but not limited to the following: the demand for photovoltaic products and the development of photovoltaic technologies; global supply and demand for polysilicon; alternative technologies in cell manufacturing; the Company’s ability to significantly expand its polysilicon production capacity and output; the reduction in or elimination of government subsidies and economic incentives for solar energy applications; and the Company’s ability to lower its production costs. Further information regarding these and other risks is included in the reports or documents that the Company has filed with, or furnished to, the U.S. Securities and Exchange Commission. All information provided in this press release is as of the date hereof, and the Company undertakes no duty to update such information or any forward-looking statement, except as required under applicable law.