Exhibit 99.1 Waystar Reports Second Quarter 2024 Results Revenue Growth of 20% year-over-year Net Loss of $27.7 million and non-GAAP net income of $5.0 million Net loss margin of (11.8)%; Adjusted EBITDA Margin of 40% LEHI, Utah and LOUISVILLE, Ky., August 7, 2024 — Waystar Holding Corp. (Nasdaq: WAY), a provider of leading healthcare payment software, today reported results for the three-month period ended June 30, 2024. "Waystar delivered strong performance across all key metrics in Q2," said Matt Hawkins ...