TABLE OF CONTENTS As filed with the U.S. Securities and Exchange Commission on May 28, 2024. Registration No. 333-275004 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 AMENDMENT NO. 7 TO FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Waystar Holding Corp. (Exact name of registrant as specified in its charter) (Address, including zip code, and telephone number, including area code, of registrant's principal executive offices) Matthew R. A. Heiman Chief Legal & Admin ...

AMENDMENT NO. 6 TO FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Waystar Holding Corp. TABLE OF CONTENTS As filed with the U.S. Securities and Exchange Commission on May 16, 2024. Registration No. 333-275004 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Delaware (State or other jurisdiction of incorporation or organization) 7373 (Primary Standard Industrial Classification Code Number) 84-2886542 (I.R.S. Employer Identification No.) 1550 Digital Drive, #300 Lehi, ...

TABLE OF CONTENTS As filed with the U.S. Securities and Exchange Commission on April 29, 2024. Registration No. 333-275004 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 AMENDMENT NO. 5 TO FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Waystar Holding Corp. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 7373 (Primary Standard Industrial Classification Code Number) 84-2886542 (I.R.S. Emp ...

TABLE OF CONTENTS As filed with the U.S. Securities and Exchange Commission on November 29, 2023. Registration No. 333-275004 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 AMENDMENT NO. 3 TO FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Waystar Holding Corp. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 7373 (Primary Standard Industrial Classification Code Number) 84-2886542 (I.R.S. ...

TABLE OF CONTENTS Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 As filed with the U.S. Securities and Exchange Commission on October 16, 2023. FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Waystar Holding Corp. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 7373 (Primary Standard Industrial Classification Code Number) 84-2886542 (I.R.S. Employer Identification No ...