[8-K] Six Flags Entertainment Corporation/NEW Reports Material Event

Rhea-AI Filing Summary

Six Flags Entertainment Corporation reported a governance update: the board designated a non-executive Chair position to take effect on January 1, 2026. The notice references a press release dated October 10, 2025 and identifies Brian C. Witherow as Chief Financial Officer. The filing is brief and does not disclose executive compensation changes, reasons for the governance move, or other operational or financial impacts. This appears to be a board leadership change announcement without accompanying financial metrics or major transactions.

Positive

• Formalizes board oversight by creating a non-executive Chair position effective Jan 1, 2026
• Clear communication via a press release dated Oct 10, 2025 indicating the company is announcing governance changes publicly

Negative

• No appointee named in the filing, leaving uncertainty about who will serve as non-executive Chair
• No details on governance impact such as committee changes, role responsibilities, or succession implications

Insights

Corporate Governance Analyst

Board leadership shift scheduled for Jan 1, 2026, with limited detail.

The board has established a non-executive Chair role effective on January 1, 2026. Creating a non-executive Chair separates board oversight from day-to-day management and can strengthen governance by clarifying roles between the board and executives.

Key dependencies include who will fill the Chair role and whether related committee assignments or governance charters will change; none are disclosed. Watch for a follow-up release or proxy materials that specify the appointee and any changes to board composition or responsibilities within the next several months.

Six Flags Entertainment Corporation/NEW false 0001999001 0001999001 2025-10-10 2025-10-10

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): October 10, 2025

SIX FLAGS ENTERTAINMENT CORPORATION

(Exact name of Registrant as specified in its charter)

Delaware		001-42157		93-4097909
(State or other jurisdiction of incorporation)		(Commission File No.)		(I.R.S. Employer Identification No.)

8701 Red Oak Blvd.,

Charlotte, North Carolina 28217

(Address of principal executive offices) (Zip Code)

(704) 414-4700

(Registrant’s telephone number, including area code)

Not Applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class		Trading Symbol(s)		Name of each exchange on which registered
Common Stock, par value $0.01 per share		FUN		New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On October 10, 2025, Six Flags Entertainment Corporation (the “Company”) announced that Selim Bassoul will step down as Executive Chairman and as a member of the Company’s Board of Directors (the “Board”) and that Daniel J. Hanrahan, Lead Independent Director, will step down as a member of the Board, each effective as of December 31, 2025. Neither Bassoul’s nor Hanrahan’s departure is due to any disagreement with the Board, the Company or management on any matter relating to the Company’s operations, policies or practices. Following their departure, the Six Flags Board will comprise 10 directors. Marilyn Spiegel will assume the role of non-executive Chair of the Board, effective as of January 1, 2026.

Item 7.01 Regulation FD Disclosure.

On October 10, 2025, the Company issued a press release announcing the Board changes at the Company. A copy of the press release is attached as Exhibit 99.1 to this report and is incorporated by reference herein.

The information furnished pursuant to this Item 7.01 shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and shall not be deemed to be incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

Exhibit Number		Description
99.1		Press Release, dated October 10, 2025 (furnished herewith)
104		Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

SIX FLAGS ENTERTAINMENT CORPORATION
(Registrant)
/s/ Brian C. Witherow
Name:		Brian C. Witherow
Title:		Chief Financial Officer

Date: October 10, 2025

FAQ

What governance change did Six Flags (FUN) report in this 8-K?

The company reported it will establish a non-executive Chair position effective January 1, 2026 and furnished a press release dated October 10, 2025.

Does the 8-K name the new non-executive Chair for FUN?

No. The filing does not name an appointee or provide biographical details about who will serve as non-executive Chair.

Were any financial impacts or executive compensation changes disclosed?

No. The filing contains no financial metrics, compensation details, or statements about operational impact.

Who is listed as Six Flags' Chief Financial Officer in the filing?

The filing identifies Brian C. Witherow as Chief Financial Officer.

When should investors expect more detail about this governance change?

Investors should look for a follow-up press release or proxy filing before or after January 1, 2026 that names the Chair and explains any board role changes.