NYSE: FUN Six Flags Entertainment Corporation/NEW 8-K

Six Flags reaches cooperation deal with longtime investor H Partners, adds founder to board

Filed May 20, 2026 · Period ending May 19, 2026 · ~1 min read

Key Changes

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H Partners founder Rehan Jaffer joins board after May 26 annual meeting, replacing Arik Ruchim. H Partners has been a significant investor for over 15 years and maintains board representation through this transition.

Item 5.02: Director Appointment verify on EDGAR →
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H Partners agrees to vote its shares with board recommendations on director elections and most proposals, but retains full discretion on major transactions like mergers and can follow ISS/Glass Lewis guidance on other matters.

Item 1.01: Cooperation Agreement verify on EDGAR →
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Jaffer's board seat is contingent on H Partners maintaining at least 3% ownership. If the stake drops below this threshold, Jaffer automatically resigns from the board and all committees.

Item 1.01: Resignation Trigger verify on EDGAR →
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The cooperation agreement runs through the 2027 annual meeting or 20 days after Jaffer leaves the board, providing roughly one year of governance stability between the company and investor.

Item 1.01: Agreement Duration verify on EDGAR →

Summary

Six Flags formalized its relationship with H Partners, a significant investor for over 15 years, through a cooperation agreement that transitions board representation from Arik Ruchim to H Partners founder Rehan Jaffer.

The deal includes voting commitments where H Partners will generally support board recommendations, though it retains independence on major corporate transactions and can follow proxy advisor guidance. This appears to be a friendly arrangement maintaining continuity rather than a contested activist situation.

For retail investors, this signals stability in the relationship between management and a major long-term shareholder. The agreement runs through mid-2027, suggesting no immediate governance battles or strategic disruptions are expected. However, the 3% ownership threshold for Jaffer's seat means investors should monitor H Partners' stake in future 13F or 13G filings. Watch for any strategic announcements or operational changes in coming quarters that might reflect H Partners' influence, particularly around capital allocation or park operations. The next annual meeting in 2027 will be the key test of whether this cooperation extends beyond the current agreement term.

Section-by-Section Diff

Event · Item 1.01 — Entry into a Material Definitive Agreement

~700 words

Item 1.01 — Entry into a Material Definitive Agreement filed; see Key Changes for terms.

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Added Board composition change medium

Added in current filing · verify on EDGAR →

On May 19, 2026, Six Flags Entertainment Corporation (the “Company”) entered into a Cooperation Agreement (the “Cooperation Agreement”) with H Partners Management, LLC (“H Partners”), pursuant to which Rehan Jaffer, Founder and Managing Member of H Partners, will be appointed to the board of directors of the Company (the “Board”) following the 2026 Annual Meeting of Stockholders on May 26, 2026 (the “2026 Annual Meeting”), replacing Arik Ruchim, who will be stepping down from the Board following the meeting.

Six Flags is replacing board member Arik Ruchim with Rehan Jaffer from H Partners after the May 26, 2026 annual meeting. H Partners has been a significant investor for over 15 years and has maintained board representation, with Ruchim serving since 2020. Jaffer will serve as a Class III director with a term expiring at the 2027 annual meeting and will join the Audit and Finance Committee.

Added Voting agreement medium

Added in current filing · verify on EDGAR →

Under the Cooperation Agreement, until the Standstill Termination Date (as defined below), H Partners agreed to vote all shares of Common Stock beneficially owned by it and over which it has direct or indirect voting power in accordance with the Board’s recommendations with respect to (i) the election, removal and/or replacement of directors of the Company (other than any removal or replacement of Mr. Jaffer) and (ii) any other proposal submitted to stockholders

H Partners has agreed to vote its shares in line with board recommendations on director elections and other proposals until the standstill termination date. However, H Partners can vote differently if proxy advisors ISS or Glass Lewis recommend otherwise on non-director proposals, and retains full discretion on extraordinary transactions like mergers or acquisitions.

Show 1 minor / wording change

Added Agreement duration low

Added in current filing · verify on EDGAR →

The Cooperation Agreement will remain in place until the later of (i) the conclusion of the 2027 Annual Meeting or (ii) twenty (20) days following the date that Mr. Jaffer no longer serves on the Board (such later date, the “Standstill Termination Date”).

The cooperation agreement, including voting commitments and standstill restrictions, will last until at least the 2027 annual meeting or 20 days after Jaffer leaves the board, whichever is later. This provides stability in the board-investor relationship for an undisclosed amount one year.

Event · Item 5.02 — Departure of Directors or Certain Officers; Election of Directors; Compensation

~100 words

Six Flags appointed a new director (Mr. Jaffer) with no related party transactions or special arrangements disclosed.

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Added Director appointment low

Added in current filing · verify on EDGAR →

Other than with respect to the matters described in Item 1.01 of this Current Report on Form 8-K, there is no arrangement or understanding between Mr. Jaffer and any other person pursuant to which he was selected as a director.

Six Flags appointed Mr. Jaffer as a director. The company disclosed that there are no special arrangements or understandings with any other person related to his selection, beyond what is described in Item 1.01 of the filing (which is not included in the provided text).

Added Related party transactions low

Added in current filing · verify on EDGAR →

Mr. Jaffer does not have any direct or indirect material interest in any transaction in which the Company is a participant that is required to be disclosed pursuant to Item 404(a) of Regulation S-K.

The company confirmed that the newly appointed director, Mr. Jaffer, has no material interest in any transactions with Six Flags that would require disclosure under SEC rules. This is standard disclosure confirming no conflicts of interest or related party transactions exist.

Event · Item 9.01 — Financial Statements and Exhibits

~100 words

Six Flags entered a cooperation agreement with H Partners Capital Management on May 19, 2026.

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Added Cooperation Agreement with H Partners high

Added in current filing · verify on EDGAR →

Cooperation Agreement, by and between Six Flags Entertainment Corporation and H Partners Capital Management, LLC, dated as of May 19, 2026

Six Flags disclosed entering into a cooperation agreement with H Partners Capital Management, LLC on May 19, 2026. Cooperation agreements with activist investors or significant shareholders typically involve board representation, governance changes, strategic initiatives, or standstill provisions. The specific terms are contained in the attached exhibit, which may include commitments on board composition, capital allocation, or operational strategy.