Item 1.01 Entry into a Material Definitive Agreement

On August 26, 2020, Six Flags Entertainment Corporation (the "Company"), Six Flags Operations Inc. ("SFO") and Six Flags Theme Parks Inc. ("SFTP") amended their existing second amended and restated senior secured credit facility entered into on April 17, 2019 (as previously amended, the "Credit Facility") by entering into the Third Amendment to Second Amended and Restated Credit Agreement (the "Third Amendment"), which, among other things, (i) extends the previously effectuated suspension of the senior secured leverage ratio financial maintenance covenant (the "Financial Maintenance Covenant") in the Credit Facility through the end of 2021, (ii) re-establishes the Financial Maintenance Covenant thereafter (provided that for each quarter in 2022 (other than the fourth quarter) that the Financial Maintenance Covenant is tested, SFTP will be permitted to use its quarterly Borrower Consolidated Adjusted EBITDA (as defined in the credit agreement governing the Credit Facility) from the second, third and fourth quarters of 2019 in lieu of the actual Borrower Consolidated Adjusted EBITDA for the corresponding quarters of 2021), (iii) reduces the commitment fee on the revolving credit facility, and (iv) extends the minimum liquidity covenant that will apply through December 31, 2022. The extension of modifications to the financial covenant and other provisions in the Credit Facility pursuant to the Third Amendment shall be in effect from the date of the Third Amendment until the earlier of the delivery of the compliance certificate for the fourth quarter of 2022 and the date on which SFTP, in its sole discretion, elects to calculate its compliance with the financial maintenance covenant by using its actual Borrower Consolidated Adjusted EBITDA instead of the 2019 figures as outlined above. In addition, all of SFTP's existing incremental revolving credit lenders agreed to extend the incremental $131 million revolving credit commitments by one year to December 31, 2022.

In connection with the Third Amendment, the Company agreed to extend the previously effectuated agreement to not make any restricted payments, including the repurchase of equity securities and the payment of cash dividends, subject to certain exceptions, until the earlier of December 31, 2022, or such time as SFTP reduces the incremental revolving credit commitments by $131 million.

The above summaries of the material terms of the Third Amendment do not purport to be complete and are qualified in their entirety by reference to the Third Amendment, a copy of which is filed as Exhibit 10.1 to this Current Report on Form 8-K and incorporated by reference herein.

Item 7.01 Regulation FD Disclosure

On August 26, 2020, the Company issued a press release announcing its entry into the Third Amendment. The press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

Cautionary Information Regarding Forward-Looking Statements

This Current Report on Form 8-K contains statements that may constitute forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. All statements other than statements of historical fact could be deemed forward-looking. These statements may involve risks and uncertainties that could cause actual results to differ materially from those described in such statements. These risks and uncertainties include, among others, (i) the timing and conditions under which we may reopen our closed parks and our expectations regarding the continued operations of our reopened parks, (ii) the operation of our parks in light of the global coronavirus pandemic ("COVID-19") following their anticipated reopening including, among other things, the effectiveness of cost-saving and health and safety measures implemented in response to COVID-19, (iii) the adequacy of cash flows from operations, available cash and available amounts under our credit facilities to meet our liquidity needs, including in the event of a prolonged closure of one or more parks, (iv) our ability to improve operating results by adopting and implementing a new strategic plan, including strategic cost reductions and organizational and personnel changes, without adversely affecting our business, (v) our plans and ability to roll out our capital enhancements and planned initiatives in a timely and cost effective manner, (vi) the extent to which having parks in many geographical locations protects our consolidated results against the effects of adverse weather and other events, (vii) our ongoing compliance with laws and regulations, and the effect of and cost and timing of compliance with newly enacted laws, regulations and accounting policies, (viii) our expectations regarding the cost or outcome of any litigation or other disputes, (ix) our annual income tax liability and the availability of net operating loss carryforwards and other tax benefits, (x) our expectations regarding uncertain tax positions, (xi) our expectations regarding our deferred revenue growth, and (xii) the risk factors or uncertainties listed from time to time in the Company's filings with the Securities and Exchange Commission (the "SEC"). In addition, important factors, including factors impacting attendance, such as local

conditions, natural disasters, contagious diseases, including the COVID-19, or the perceived threat of contagious diseases, events, disturbances and terrorist activities; regulations and guidance of federal, state and local governments and health officials regarding the response to COVID-19, including with respect to business operations, safety protocols and public gatherings (such as voluntary and in some cases, mandatory, quarantines as well as shut downs and other restrictions on travel and commercial, social and other activities); political or military events; recall of food, toys and other retail products sold at our parks; accidents or contagious disease outbreaks occurring at our parks or other parks in the industry and adverse publicity concerning our parks or other parks in the industry; availability of commercially reasonable insurance policies at reasonable rates; inability to achieve desired improvements and financial performance goals set forth in our aspirational goals; adverse weather conditions such as excess heat or cold, rain and storms; general financial and credit market conditions, including our ability to access credit or raise capital; economic conditions (including customer spending patterns); changes in public and consumer tastes; construction delays in capital improvements and ride downtime; competition with other theme parks, waterparks and entertainment alternatives; dependence on a seasonal workforce; unionization activities and labor disputes; laws and regulations affecting labor and employee benefit costs, including increases in state and federally mandated minimum wages, and healthcare reform; environmental laws and regulations; laws and regulations affecting corporate taxation; pending, threatened or future legal proceedings and the significant expenses associated with litigation; cybersecurity risks and other factors could cause actual results to differ materially from the Company's expectations. Although we believe that the expectations reflected in such forward-looking statements are reasonable, we can give no assurance that such expectations will be realized and actual results could vary materially. Reference is made to a more complete discussion of forward-looking statements and applicable risks contained under the captions "Cautionary Note Regarding Forward-Looking Statements" and "Risk Factors" in the Company's Annual and Quarterly Reports on Forms 10-K and 10-Q, and its other filings and submissions with the SEC, each of which are available free of charge on the Company's investor relations website at investors.sixflags.com and on the SEC's website at www.sec.gov.

Item 9.01 Financial Statements and Exhibits

(d) Exhibits

10.1 Third Amendment to Second Amended and Restated Credit Agreement, dated as of August 26, 2020, among Six Flags Entertainment Corporation, Six Flags Operations Inc., Six Flags Theme Parks Inc., the other subsidiary guarantors party thereto, Wells Fargo Bank, National Association, as administrative agent and the other lenders party thereto

99.1 Press Release of Six Flags Entertainment Corporation, dated August 26, 2020

104 Cover Page Interactive Data File (cover page XBRL tags are embedded within the Inline XBRL document)

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