6-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

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

For the month of January 2026

Commission File Number: 001-37829

NISUN INTERNATIONAL ENTERPRISE DEVELOPMENT GROUPCO., LTD

(Registrant’s name)

21F, 55 Loushanguan Rd

Changning District Shanghai 200336

People’s Republic of China

(Address of principal executive office)

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

Form 20-F ☒       Form 40-F ☐

Departure of Director

On January 28, 2026, the majority of directors (the “Directors”) of the board of directors (the “Board”) of Nisun International Enterprise Development Group Co., Ltd (the “Company”)  received letters of resignation from Mr. Liu Xin as a director and Mr. Christian DeAngelis as an independent director and as a member of the compensation committee and the audit committee, effective as of January 28, 2026.

Mr. Liu Xin’s resignation from the Board was in connection with the Board’s ongoing refreshment process and was not the result of any disagreement with the Company on any matter relating to the Company’s operations, policies, or practices. Mr. Liu will continue to serve as Co-Chief Executive Officer of the Company.

Mr. Christian DeAngelis’s resignation was not the result of any disagreement with the Company on any matter relating to the Company’s operations, policies or practices. The Directors expressed its gratitude for his contributions and dedicated service to the Company.

Name Change and Ticker Symbol Change

The Company will change its English name from “Nisun International Enterprise Development Group Co., Ltd” to “AIOS Tech Inc.” and its Nasdaq ticker symbol from “NISN” to “AIOS” (collectively, the “Corporate Events”). The Company anticipates that the Corporate Events will be effective upon the commencement of trading on the Nasdaq Capital Market on or around February 12, 2026 (U.S. Eastern Time), at which time the Company’s Class A ordinary shares will cease trading under the current ticker symbol “NISN” and will begin trading under the new ticker symbol “AIOS” on the Nasdaq Capital Market. In addition, the Company will remove its Chinese name “宁圣国际企业发展集团有限公司” from its certificate of incorporation. (the “Name Removal”) and to adopt “爱奥斯科技有限公司as the official Chinese translation of its English name. The Corporate Events and Name Removal are part of the Company’s strategic transformation plan.

1

Exhibits

2

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.

3

Exhibit 99.1

Nisun International Enterprise Development GroupCo., Ltd Announces Corporate Name Change and Ticker Symbol Change

Shanghai, China, January 29, 2026 – Nisun International Enterprise Development Group Co., Ltd (the “Company” or “Nisun International”) (NASDAQ: NISN), today announced that it will change its English name from “Nisun International Enterprise Development Group Co., Ltd” to “AIOS Tech Inc.”and its Nasdaq ticker symbol from “NISN” to “AIOS” (collectively, the “Corporate Events”). The Company anticipates that the Corporate Events will be effective upon the commencement of trading on the Nasdaq Capital Market on or around February 12, 2026 (U.S. Eastern Time), at which time the Company’s Class A ordinary shares will cease trading under the current ticker symbol “NISN” and will begin trading under the new ticker symbol “AIOS” on the Nasdaq Capital Market. In addition, the Company will remove its Chinese name “宁圣国际企业发展集团有限公司” from its certificate of incorporation. (the “Name Removal”) and to adopt “爱奥斯科技有限公司as the official Chinese translation of its English name. The Corporate Events and Name Removal are part of the Company’s strategic transformation plan.

About Nisun International Enterprise DevelopmentGroup Co., Ltd

Following its recently approved strategic transformation plan, Nisun International Enterprise Development Group Co., Ltd is repositioning itself as a leading provider of artificial intelligence and technology-driven professional services. The Company is focused on delivering innovative information technology solutions, advanced data services, and artificial intelligence-powered offerings to a diverse commercial client base. Its core businesses include digital transformation services, tailored IT solutions for the financial sector, enterprise data solutions, and the development of AI platforms and infrastructure to drive efficiency and growth for clients across multiple industries.

Forward-Looking Statements

This press release contains forward-looking statements as defined by the Private Securities Litigation Reform Act of 1995. Forward-looking statements include statements concerning plans, objectives, goals, strategies, future events or performance, and underlying assumptions and other statements that are other than statements of historical facts. When the Company uses words such as “may,” “will,” “intend,” “should,” “believe,” “expect,” “anticipate,” “project,” “estimate” or similar expressions that do not relate solely to historical matters, it is making forward-looking statements. Forward-looking statements are not guarantees of future performance and involve risks and uncertainties that may cause the actual results to differ materially from the Company’s expectations discussed in the forward-looking statements. These statements are subject to uncertainties and risks including, but not limited to, the uncertainties related to the implementation of the strategic transformation; the Company’s ability to successfully execute its exit from legacy business lines in a timely and cost-effective manner; the Company’s ability to develop its new business lines and achieve market acceptance for its new services; the impact of the transition on its financial performance, including potential for decreased revenue and sustained losses; the costs associated with developing new technologies and services; competition in the IT services and data solutions markets; the Company’s ability to attract and retain qualified personnel; and other risks contained in reports filed by the Company with the Securities and Exchange Commission. For these reasons, among others, investors are cautioned not to place undue reliance upon any forward-looking statements in this report. Additional factors are discussed in the Company’s filings with the U.S. Securities and Exchange Commission, which are available for review at www.sec.gov. The Company undertakes no obligation to publicly revise these forward-looking statements to reflect events or circumstances that arise after the date hereof, except as may be required by law.

For investor and media inquiries, please contact:

Nisun International Enterprise Development Group Co., Ltd

Investor Relations

Email: ir@nisngroup.com