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AI brief of an SEC Form 8-K · Six Flags (FUN)

Six Flags names Richard Haddrill executive chairman, effective immediately

Neutral Impact 4 of 5 leadership Written later

Six Flags Entertainment appointed Richard Haddrill as Executive Chair of its Board, effective immediately, on March 24, 2026, with the Board expanding to 11 members. Under a three-year employment agreement, he receives a $500,000 annual base salary and sign-on equity awards, and Marilyn Spiegel was named Lead Independent Director. The company says Haddrill will focus on improving profitability, but the filing contains no financial results or guidance.

Key points

  • Richard Haddrill appointed Executive Chair effective immediately; he will also serve as a Class II director until the 2026 Annual Meeting of Stockholders
  • Employment agreement covers three years with a $500,000 annual base salary
  • Sign-on grants include 217,797 restricted stock awards and 373,367 performance stock units
  • Marilyn Spiegel named Lead Independent Director; Board to expand to 11 members, reverting to 10 after Jennifer Mason leaves at the 2026 annual meeting

The filing

CompanySix Flags (FUN)
Form8-K, current report
Filed with the SECMar 25, 2026, 5:19 PM ET
Accession number0001193125-26-124392

Items reported: 5.02 Director / Officer Change7.01 Regulation FD Disclosure

Read the filing on SEC.gov ↗

Written by AI (Anthropic Claude, claude-haiku-5-5) on Nov 8, 2026, 6:59 AM ET, from the text of the filing and its press-release exhibits only. Written later: this filing was briefed after the fact, when past filings were added to the site, so the brief may be read with hindsight; the filing itself is the record of what was known on March 25, 2026.

Briefs are written by AI from the filing text (each brief's own page names the model) and can contain mistakes — open the filing before acting on anything. Impact (1-5) and tone are the model's reading of the filing for shareholders, not a price forecast. Not investment advice.