Table of Contents Title of Each Class Trading Symbol(s) Name of Each Exchange on Which Registered BTCM New York Stock Exchange* UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 20-F (Mark One) ☐ Registration statement pursuant to Section 12(b) or 12(g) of the Securities Exchange Act of 1934 or ☒ Annual report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended December 31, 2023 or ☐ Transition report pursuant to Section 13 or 15(d) of ...