Robo.ai美股招股说明书(2026-07-15版)

Prospectus Supplement No.1(To Prospectus DatedJuly 10, 2026) Robo.ai Inc. Up to 22,343,750 Class B Ordinary Shares This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated July10, 2026, which forms a part of our registration statement on FormF-1 (Registration No.333-296767),as amended and supplemented,with the information contained in our current report on Form6-K furnished with the U.S. Securities and Exchange Commission onJuly 15, 2026. The prospectus relates to the potential offer and sale from time to time by the selling shareholder named therein or itspledgees, donees, transferees, assignees, or other successors in interest (that receive any of the securities as a gift, distribution, or othernon-salerelated transfer) of up to 22,343,750 ClassB ordinary shares, par value US$0.002 per share, of Robo.ai Inc. This prospectus supplement updates and supplements the information in the prospectus and is not complete without, and maynot be delivered or utilized except in combination with, the prospectus, including any amendments or supplements thereto. Thisprospectus supplement should be read in conjunction with the prospectus and if there is any inconsistency between the informationtherein and this prospectus supplement, you should rely on the information in this prospectus supplement. Our Class B ordinary shares are listed on the Nasdaq Stock Market LLC, or Nasdaq, under the ticker symbol “AIIO.” On July14, 2026, the closing price of our Class B ordinary shares on Nasdaq was US$3.99. We may further amend or supplement the prospectus from time to time by filing amendments or supplements as required. Youshould read the entire prospectus, this prospectus supplement, and any amendments or supplements carefully before you make yourinvestment decision. Investing in our securities involves a high degree of risk. See “Risk Factors” beginning on page18 of the prospectusfor a discussion of information that should be considered in connection with an investment in our securities. Neither the U.S. Securities and Exchange Commission nor any other regulatory body has approved or disapproved ofthese securities or determined if thisprospectus supplementor the prospectus is truthful or complete. Any representation tothe contrary is a criminal offense. The date of this prospectus supplement is July 15, 2026.