Official announcements (8-K)

Shared financial results (Item 2.02)

New results: figures on this page will update when the full quarterly or annual report is filed.

In the company's wordsOn November 5, 2026, Six Flags Entertainment Corporation issued a news release disclosing 2026 fiscal third-quarter results. A copy of the news release is furnished as Exhibit 99.1 to this Current Report on Form 8-K. This information shall not be deemed to be "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise be subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, except as expressly set forth by specific reference in such filing.

Shared information with investors (Item 7.01)

Information shared with investors, often a presentation or press release.

In the company's wordsOn November 5, 2026, Six Flags Entertainment Corporation posted a slide presentation on its investor relations website. The presentation may be used, in whole or in part, or with modifications, in connection with presentations to investors, analysts and others. A copy of the presentation is furnished as Exhibit 99.2 to this Current Report on Form 8-K. This information shall not be deemed to be "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise be subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, except as expressly set forth by …

Shared financial results (Item 2.02)

New results: figures on this page will update when the full quarterly or annual report is filed.

In the company's wordsOn August 6, 2026, Six Flags Entertainment Corporation issued a news release disclosing 2026 fiscal second-quarter results. A copy of the news release is furnished as Exhibit 99.1 to this Current Report on Form 8-K. This information shall not be deemed to be "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise be subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, except as expressly set forth by specific reference in such filing.

Change in its leaders or board (Item 5.02)

New leaders or board members can bring a change in strategy.

In the company's wordsOn July 1, 2026, Six Flags Entertainment Corporation (the “Company”) announced Tim Fisher’s departure from the role of Chief Operating Officer of the Company, effective July 15, 2026. Mr. Fisher will remain with the Company through December 15, 2026 in the role of Special Advisor to the Chief Executive Officer, as contemplated in his previously disclosed employment agreement amendment with the Company dated June 25, 2026. On July 2, 2026, the Company also announced the appointment of Mark Pauls as Chief Operating Officer of the Company, effective July 15, 2026. Mr. Pauls, age 63, has served from December 2025 to the present as Senior Vice President of Operations at …

Shared information with investors (Item 7.01)

Information shared with investors, often a presentation or press release.

In the company's wordsOn July 2, 2026, the Company issued a press release announcing the matters disclosed in Item 5.02 above. 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, including Exhibit 99.1, 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.

Change in its leaders or board (Item 5.02)

New leaders or board members can bring a change in strategy.

In the company's wordsOn June 25, 2026, Six Flags Entertainment Corporation (the “Company”) entered into an amendment (the “Amendment”) of its employment agreement with Tim Fisher, the Company’s Chief Operating Officer, as amended (the “Employment Agreement”). Among other things, the Amendment provides that the term of Mr. Fisher’s Employment Agreement will expire on December 15, 2026, and in order to retain Mr. Fisher through such date, provides that certain benefits to which he is entitled will be extended through that date. Mr. Fisher agreed that he will not be entitled to a 2026 annual equity grant or retention bonus payment under his Employment Agreement.

Change in its leaders or board (Item 5.02)

New leaders or board members can bring a change in strategy.

In the company's wordsOn May 27, 2026, Six Flags Entertainment Corporation (the “Company”) announced the appointment of Ash Walia as Chief Financial Officer of the Company, effective June 17, 2026. Mr. Walia, age 62, has served as Chief Financial Officer of Hot Topic since 2021. Prior to Hot Topic, Mr. Walia was Chief Financial Officer of 99 Cents Only Stores, where he oversaw the finance, IT and marketing teams. From 2011 to 2018, he held various senior leadership roles at Starbucks Corporation across corporate finance, shared services and supply chain operations, including leading corporate finance as Senior Vice President of Corporate Finance. Earlier in his career, he spent seven years in …

Shared information with investors (Item 7.01)

Information shared with investors, often a presentation or press release.

In the company's wordsOn May 27, 2026, the Company issued a press release announcing the matters disclosed in Item 5.02 above. 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, including Exhibit 99.1, 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.

Shared shareholder vote results (Item 5.07)

How shareholders voted on board members and proposals.

In the company's wordsOn May 26, 2026, Six Flags Entertainment Corporation (the "Company") held its annual meeting of stockholders (the "2026 Annual Meeting") virtually via live webcast to consider and vote upon three proposals submitted by the Board of Directors of the Company. The final voting results, which were certified by the inspector of election at the 2026 Annual Meeting, were as follows: 1.To elect Richard Haddrill, Chieh Huang, and Marilyn Spiegel as Class II Directors of the Company for a three-year term expiring in 2029. Nominee For Withhold Broker Non-Votes Richard Haddrill 72,559,637 2,026,136 13,339,349 Chieh Huang 60,221,596 14,364,177 13,339,349 Marilyn Spiegel 71,349,419 …

Signed a major agreement (Item 1.01)

A major new contract can change what the company sells, spends or owes.

In the company's wordsEntry into a Material Definitive Agreement. 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. H Partners has been a significant investor in the Company for more than 15 years and has long had a representative on the …

Change in its leaders or board (Item 5.02)

New leaders or board members can bring a change in strategy.

In the company's wordsThe information set forth under Item 1.01 of this Current Report on Form 8-K is incorporated herein by reference. 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. 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.

Change in its leaders or board (Item 5.02)

New leaders or board members can bring a change in strategy.

In the company's wordsOn May 7, 2026, Six Flags Entertainment Corporation (the “Company”) announced the departures of Brian Witherow, the Chief Financial Officer of the Company, and Brian Nurse, the Chief Legal and Compliance Officer of the Company, effective May 8, 2026. David Hoffman, the Chief Accounting Officer of the Company, will serve as the Interim Chief Financial Officer, effective May 8, 2026. Mr. Hoffman, age 57, has served as Chief Accounting Officer of the Company since the completion of the merger of legacy Six Flags and legacy Cedar Fair. Prior to the merger, Mr. Hoffman served as Senior Vice President and Chief Accounting Officer of Cedar Fair from 2012 until the consummation …

Shared information with investors (Item 7.01)

Information shared with investors, often a presentation or press release.

In the company's wordsOn May 7, 2026, the Company issued a press release announcing the matters disclosed in Item 5.02 above as well as other executive leadership changes. 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, including Exhibit 99.1, 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.

Shared financial results (Item 2.02)

New results: figures on this page will update when the full quarterly or annual report is filed.

In the company's wordsOn May 7, 2026, Six Flags Entertainment Corporation issued a news release disclosing 2026 fiscal first-quarter results. A copy of the news release is furnished as Exhibit 99.1 to this Current Report on Form 8-K. This information shall not be deemed to be "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise be subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, except as expressly set forth by specific reference in such filing.

Shared information with investors (Item 7.01)

Information shared with investors, often a presentation or press release.

In the company's wordsOn April 8, 2026, Six Flags Entertainment Corporation (the “Company”) announced that its subsidiary Six Flags America Property Corporation, entered into a purchase agreement to sell certain real property located in Prince George’s County, Maryland, to a joint venture between 35V, the investment firm co-founded by NBA champion Kevin Durant and Rich Kleiman, and Atlanta-based TPA Group (the “Transaction”). The Transaction is subject to buyer’s diligence and other closing conditions. The Company expects to use net proceeds from the Transaction to pay down the Company’s debt obligations. The information furnished pursuant to this Item 7.01 shall not be deemed “filed” for …

Shared information with investors (Item 7.01)

Information shared with investors, often a presentation or press release.

In the company's wordsOn April 6, 2026, Six Flags Entertainment Corporation (the “Company”) issued a press release announcing the consummation of the Transaction (as defined below). The press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

Announced another event (Item 8.01)

Another event the company chose to report publicly.

In the company's wordsAs previously announced on March 5, 2026, the Company entered into that certain Equity Purchase Agreement (the “Purchase Agreement”), dated March 5, 2026, among the Company, EPR Properties, a Maryland real estate investment trust (“Buyer”), and EP OPCO WOFR, LLC, a Delaware limited liability company (the “Operator”), to sell the assets and certain liabilities associated with the following parks: Worlds of Fun (Kansas City, Missouri); Michigan’s Adventure (Muskegon, Michigan); Valleyfair (Shakopee, Minnesota); Six Flags Great Escape (Queensbury, New York); Schlitterbahn Waterpark Galveston (Galveston, Texas); and Six Flags St. Louis (Eureka, Missouri) (collectively, the …

Change in its leaders or board (Item 5.02)

New leaders or board members can bring a change in strategy.

In the company's wordsOn March 24, 2026, the Board of Directors (the “Board”) of Six Flags Entertainment Corporation (the “Company”) appointed Richard Haddrill as the Company’s Executive Chair of the Board, effective immediately. Mr. Haddrill will serve as a Class II director, with a term expiring at the Company’s 2026 Annual Meeting of Stockholders, and the Board will expand to 11 members. In connection with Mr. Haddrill’s appointment, the Board has appointed Marilyn Spiegel to serve as Lead Independent Director of the Board. Mr. Haddrill, age 72, is the founder and Chief Executive Officer of The Groop, LLC, an investment and advisory company he founded in January 2018. Mr. Haddrill is also …

Shared information with investors (Item 7.01)

Information shared with investors, often a presentation or press release.

In the company's wordsOn March 25, 2026, the Company issued a press release announcing the appointment of Mr. Haddrill as Executive Chair. 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, including Exhibit 99.1, 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.

Change in its leaders or board (Item 5.02)

New leaders or board members can bring a change in strategy.

Signed a major agreement (Item 1.01)

A major new contract can change what the company sells, spends or owes.

Shared information with investors (Item 7.01)

Information shared with investors, often a presentation or press release.

Shared financial results (Item 2.02)

New results: figures on this page will update when the full quarterly or annual report is filed.

Signed a major agreement (Item 1.01)

A major new contract can change what the company sells, spends or owes.

Signed a major agreement (Item 1.01)

A major new contract can change what the company sells, spends or owes.

Took on a major new debt or obligation (Item 2.03)

New borrowing adds to what the company owes and the interest it pays.

Shared information with investors (Item 7.01)

Information shared with investors, often a presentation or press release.

Announced another event (Item 8.01)

Another event the company chose to report publicly.

Announced another event (Item 8.01)

Another event the company chose to report publicly.

Change in its leaders or board (Item 5.02)

New leaders or board members can bring a change in strategy.

Change in its leaders or board (Item 5.02)

New leaders or board members can bring a change in strategy.

Change in its leaders or board (Item 5.02)

New leaders or board members can bring a change in strategy.

Shared information with investors (Item 7.01)

Information shared with investors, often a presentation or press release.

Shared financial results (Item 2.02)

New results: figures on this page will update when the full quarterly or annual report is filed.

Shared information with investors (Item 7.01)

Information shared with investors, often a presentation or press release.

Signed a major agreement (Item 1.01)

A major new contract can change what the company sells, spends or owes.

Change in its leaders or board (Item 5.02)

New leaders or board members can bring a change in strategy.

Shared information with investors (Item 7.01)

Information shared with investors, often a presentation or press release.

Change in its leaders or board (Item 5.02)

New leaders or board members can bring a change in strategy.

Shared information with investors (Item 7.01)

Information shared with investors, often a presentation or press release.

Shared information with investors (Item 7.01)

Information shared with investors, often a presentation or press release.

Shared shareholder vote results (Item 5.07)

How shareholders voted on board members and proposals.

Change in its leaders or board (Item 5.02)

New leaders or board members can bring a change in strategy.

Shared information with investors (Item 7.01)

Information shared with investors, often a presentation or press release.

Shared financial results (Item 2.02)

New results: figures on this page will update when the full quarterly or annual report is filed.

Signed a major agreement (Item 1.01)

A major new contract can change what the company sells, spends or owes.

Took on a major new debt or obligation (Item 2.03)

New borrowing adds to what the company owes and the interest it pays.

Shared shareholder vote results (Item 5.07)

How shareholders voted on board members and proposals.

Shared information with investors (Item 7.01)

Information shared with investors, often a presentation or press release.

Shared financial results (Item 2.02)

New results: figures on this page will update when the full quarterly or annual report is filed.

Shared information with investors (Item 7.01)

Information shared with investors, often a presentation or press release.

Signed a major agreement (Item 1.01)

A major new contract can change what the company sells, spends or owes.

Change in its leaders or board (Item 5.02)

New leaders or board members can bring a change in strategy.

Shared information with investors (Item 7.01)

Information shared with investors, often a presentation or press release.

Shared financial results (Item 2.02)

New results: figures on this page will update when the full quarterly or annual report is filed.

Set a date for shareholders to nominate directors (Item 5.08)

Sets the timetable for shareholders to put forward board candidates.

Announced another event (Item 8.01)

Another event the company chose to report publicly.

Signed a major agreement (Item 1.01)

A major new contract can change what the company sells, spends or owes.