Six Flags Entertainment Corporation/NEW 8-K

What Happened
Six Flags Entertainment Corporation announced on March 24–25, 2026 that the Board appointed Richard Haddrill as Executive Chair of the Board (effective immediately) and expanded the Board to 11 members. Mr. Haddrill will serve as a Class II director with a term expiring at the Company’s 2026 Annual Meeting. In connection with his appointment, Marilyn Spiegel was named Lead Independent Director. The company filed a press release about the appointments as Exhibit 99.1 to its Form 8-K.

Key Details

• Employment agreement: three-year term; first two years as Executive Chair and final year as Executive Chair or Board Chair as mutually agreed. Base salary: $500,000 per year.
• Equity awards at hire: 217,797 restricted stock awards (RSAs) vesting quarterly over the three-year term and 373,367 performance stock units (PSUs) vesting based on specified performance targets.
• Termination and change-in-control provisions: if terminated by the company without Cause or by Mr. Haddrill for Good Reason, RSAs vest pro rata and PSUs vest based on actual performance; if termination without Cause or resignation for Good Reason occurs within 18 months after a Change in Control, equity generally fully vests with at least one-third of the Sign-on PSU award (124,456 shares) vesting.
• Other terms: PSUs forfeited on termination for Cause or resignation without Good Reason (with some exceptions); pro‑rata clawback of any PSU-settled shares issued in the calendar year of a termination in certain cases; restrictive covenants include two-year non-solicit of employees, confidentiality, and non-disparagement; all payouts require a signed release.

Why It Matters
This filing documents a governance change at the board level (new Executive Chair and a Lead Independent Director) and a significant compensation package tied to tenure and performance. The equity component (RSAs and PSUs) will be recognized in future filings and can affect reported compensation expense and share count when awards vest or are settled. Investors should note the change-in-control and termination protections that govern vesting outcomes and the Board expansion and leadership shift that may influence corporate oversight and strategic direction.