Six Flags Entertainment Corporation (NYSE: FUN) (the “Company”, “Six Flags” or the “Combined Company”), the largest regional amusement park operator in North America, today announced the appointment of John Reilly as President and Chief Executive Officer, effective December 8, 2025. Mr. Reilly will also join the Six Flags Board of Directors (the “Board”) at that time. The appointment concludes a robust succession planning process led by the Six Flags Board with the assistance of a leading global executive search firm.