
Six Flags Entertainment Corporation (NYSE: FUN) has announced a major leadership shakeup that has investors paying close attention. On Nov. 24, 2025, the company appointed John Reilly as its new President and CEO, effective Dec. 8, 2025. Reilly replaces Richard Zimmerman, who is stepping down after guiding the company through its recent merger.
The market reaction was immediate and positive. Following the announcement, shares of Six Flags jumped approximately 7% in trading. This enthusiastic response suggests that Wall Street views this change as a definitive turning point for the entertainment sector giant.