FORM S-1 REGISTRATION STATEMENT Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Table of Contents As filed with the Securities and Exchange Commission on June 8, 2023 UNDER THE SECURITIES ACT OF 1933 RingCentral, Inc. Delaware 7372 94-3322844 (Primary Standard Industrial Classification Code Number) (I.R.S. Employer Identification Number) 20 Davis Drive Belmont, California 94002 (650) 472-4100 (Address, including zip code, and telephone number, including area cod ...