SCHEDULE 13G/A

Waystar Holding Corp

Common Stock, par value $0.01 per share · CUSIP: 946784105

Event date: 2025-06-30

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• BCPE Derby Investor, LP

  Shares: 2,609,155 · Class: 1.5%

• BCPE Derby (DE) SPV, LP

  Shares: 15,445,894 · Class: 8.9%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.