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 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of March 2023 Commission File Number: 001-39302 UCLOUDLINK GROUP INC. (Registrant’s Name) Unit 2214-Rm1, 22/F, Mira Place Tower A 132 Nathan Road, Tsim Sha Tsui Kowloon, Hong Kong (Address of Principal Executive Offices) Indicate by check mark whether the registrant files or will file annual reports under c ...