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 ...