UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16 OF THE

SECURITIES EXCHANGE ACT OF 1934

For the month of May 2025

Commission File Number 001-41631

Xiao-I Corporation

(Translation of registrant’s name into English)

5/F, Building 2, No. 2570

Hechuan Road, Minhang District

Shanghai, China 201101

(Address of principal executive offices)

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

Form 20-F ☒      Form 40-F ☐

Departure of Director

On April 30, 2025, Ms. Xiaomei Wu tendered her resignation as a member of the Board of Directors (the “Board”) of Xiao-I Corporation (the “Company”). Ms. Wu was not an independent director prior to her resignation from the Board. Ms. Xiaomei Wu’s decision to resign was not the result of any disagreement with the Company, the Board, management, or any matter relating to the Company’s operations, policies or practices.

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.