ADVENT INTERNATIONAL, L.P. - 01 Oct 2025 SCHEDULE 13D Report for Waystar Holding Corp. Common Stock, par value $0.01 per share (WAY)

Filing Manager
ADVENT INTERNATIONAL, L.P.
Reporting Manager
ADVENT INTERNATIONAL, L.P.
Security
Waystar Holding Corp. Common Stock, par value $0.01 per share
Symbol
WAY
Shares outstanding
190,687,914 shares
Disclosed Ownership
11,059,899 shares
Ownership
5.8%
Form type
SCHEDULE 13D
Filing time
03 Oct 2025, 20:36:35 UTC
Date of event
01 Oct 2025
SEC
View on sec.gov

Reporting Managers (3)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
ADVENT INTERNATIONAL, L.P. 5.8% 11,059,899 0 11,059,899 /s/ Neil Crawford Neil Crawford / Vice President of Finance 0001034196
Advent International GP, LLC 5.8% 11,059,899 0 11,059,899 /s/ Neil Crawford Neil Crawford / Vice President of Finance
AIO Holdings L.P. 5.8% 11,059,899 0 11,059,899 /s/ Neil Crawford Neil Crawford / Treasurer and Secretary