Transaction Details

Footnotes

These transactions occurred automatically pursuant to a plan adopted by the Reporting Person on November 22, 2024, that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). | This footnote notes a correction and clerical error in the number of securities reported in Table I, Column 4 of a Form 4 filed on June 11, 2025 (the "Prior Form 4") for the Reporting Person, which incorrectly stated the number of securities sold as 2,704 instead of 46,667. All other aspects of the Prior Form 4, including the total number of securities beneficially owned following the reported transaction, as shown in Column 5, were correctly reported in the Prior Form 4. | The price reported in Column 4 is a weighted average price. These shares of common stock, par value $0.01 per share ("Common Stock") of Waystar Holding Corp. (the "Issuer") were sold in multiple transactions ranging from $37.8000 to $38.5600, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price in the range set forth in this footnote. | These options are currently vested.