# EDGAR Filing Document

**Accession Number:** 0001999001
**File Stem:** 0001193125-26-232593
**Filing Date:** 2026-5
**Character Count:** 49504
**Document Hash:** f95d189c125251e0d43b2e878d639075
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-232593.hdr.sgml**: 20260520

**ACCESSION NUMBER**: 0001193125-26-232593

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 12

**CONFORMED PERIOD OF REPORT**: 20260519

**ITEM INFORMATION**: Entry into a Material Definitive Agreement

**ITEM INFORMATION**: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20260520

**DATE AS OF CHANGE**: 20260520

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Six Flags Entertainment Corporation/NEW
- **CENTRAL INDEX KEY:** 0001999001
- **STANDARD INDUSTRIAL CLASSIFICATION:** SERVICES-AMUSEMENT & RECREATION SERVICES [7900]
- **ORGANIZATION NAME:** 07 Trade & Services
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-42157
- **FILM NUMBER:** 261004151

**BUSINESS ADDRESS:**
- **STREET 1:** 8701 RED OAK BLVD.
- **CITY:** CHARLOTTE
- **STATE:** NC
- **ZIP:** 28217
- **BUSINESS PHONE:** (419) 626-0830

**MAIL ADDRESS:**
- **STREET 1:** 8701 RED OAK BLVD.
- **CITY:** CHARLOTTE
- **STATE:** NC
- **ZIP:** 28217

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** CopperSteel HoldCo, Inc.
- **DATE OF NAME CHANGE:** 20231027

?xml version='1.0' encoding='ASCII'? 8-K

### 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): May 19, 2026

## SIX FLAGS ENTERTAINMENT CORPORATION

#### (Exact name of Registrant as specified in its charter)

---

| | | |
|:---|:---|:---|
| **Delaware** | **001-42157** | **93-4097909** |
| **(State or other jurisdiction<br>of incorporation)** | **(Commission**<br> **File No.)** | **(I.R.S. Employer<br>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<br>Symbol(s)** | **Name of each exchange<br>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 1.01** | **Entry 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 Six Flags Board, with Mr. Ruchim serving as a director since 2020. The Company thanks Mr. Ruchim for his outstanding contributions to the Board and looks forward to benefitting from Mr. Jaffer's skills and experience.

Additionally, pursuant to the Cooperation Agreement, Mr. Jaffer delivered to the Company an irrevocable resignation letter pursuant to which he will resign from the Board and all applicable committees thereof effective upon the earliest of (i) the date on which H Partners ceases to have beneficial ownership and/or economic exposure of or to at least 3% of the Company's then outstanding shares of common stock ("Minimum Ownership Requirement") and (ii) the date on which H Partners has been determined by a final non-appealable judgment of a court of competent jurisdiction to have materially breached any of its obligations under the Cooperation Agreement that has not been cured after written notice from the Company.

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; provided, however, that in the event either Institutional Shareholder Services Inc. and Glass Lewis & Co. recommend otherwise with respect to any Company-sponsored proposal submitted to stockholders (other than the election or removal of directors), H Partners shall be permitted (but not required) to vote in the same proportion as the vote of all other holders of Common Stock; provided, further, that H Partners will be permitted to vote in its sole discretion with respect to any proposal to approve an extraordinary transaction.

The Cooperation Agreement also includes customary standstill restrictions and mutual non-disparagement provisions.

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 foregoing description of the Cooperation Agreement does not purport to be complete and is qualified in its entirety by the full text of the Cooperation Agreement, a copy of which is filed hereto as Exhibit 10.1 and incorporated herein by reference.

---

| | |
|:---|:---|
| **Item 5.02** | **Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.**  |

---

The 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.

---

| | |
|:---|:---|
| **Item 9.01** | **Financial Statements and Exhibits.**  |

---

(d) Exhibits.

---

| | |
|:---|:---|
| **Exhibit<br>Number** | **Description** |
| 10.1 | [Cooperation Agreement, by and between Six Flags Entertainment Corporation and H Partners Capital Management, LLC, dated as of May 19, 2026](d228026dex101.htm) |
| 104 | Cover page Interactive Data File (embedded within Inline XBRL document) |

---

------

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

---

| |
|:---|
| **SIX FLAGS ENTERTAINMENT CORPORATION** |
| (Registrant) |
| /s/ John Reilly |
| Name: John Reilly |
| Title: President & Chief Executive Officer |

---

Date: May 20, 2026

## Exhibit 10.1

**Exhibit 10.1** 

**Cooperation Agreement** 

May 19, 2026

H Partners Management, LLC

888 7th Ave

New York, NY 10019

Ladies and Gentlemen:

Six Flags Entertainment Corporation (the "<u>Company</u>"), on the one hand, and H Partners Management, LLC ("<u>H Partners</u>"), on the other hand, have mutually agreed to the terms contained in this letter agreement (this "<u>Letter Agreement</u>"). For purposes of this Letter Agreement, we refer to each of the Company and H Partners as a "<u>Party</u>" and, collectively, as the "<u>Parties</u>."

1. <u>Board Matters</u>.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) Effective immediately following the 2026 annual meeting of stockholders (the " <u>2026 Annual Meeting</u> "), (i) Arik Ruchim shall resign from the Company's Board of Directors (the " <u>Board</u> "), (ii) the Board and all applicable committees thereof shall take such actions as are necessary to appoint Rehan Jaffer to

resignation of Mr. Ruchim and (iii) appoint Mr. Jaffer to the Audit and Finance Committee of the Board. Mr. Jaffer shall be considered for membership on the committees of the Board in the same manner as other independent members
of the Board. In addition, Mr. Jaffer shall be permitted to attend and participate in meetings of any committee in the same manner as may be applicable to other members of the Board.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) Mr. Jaffer shall provide to the Company all customary materials and information as are required of all
other directors, including, the Company's standard director and officer questionnaire as then in effect, and such materials and information as are required to be or customarily included in a proxy statement filed pursuant to the proxy rules of
the Securities and Exchange Commission (the " <u>SEC</u> "). Subject to the terms of this Letter Agreement or as otherwise agreed in writing between the Parties, H Partners and Mr. Jaffer acknowledge and agree that the policies,
procedures, processes, codes, rules, standards and guidelines applicable to other directors of the Company, including, but not limited to, with respect to confidentiality, related party transactions and insider trading (as may be amended from time
to time, collectively, " <u>Company Policies</u> ") will be applicable to Mr. Jaffer in the same manner applicable to such other directors.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c) H Partners represents and warrants that, as of the date hereof, H Partners beneficially owns in the aggregate
4,650,000 shares of common stock, par value $0.01 per share, of the Company (" <u>Common Stock</u> ") and H Partners is not a party to any swap or hedging transactions or other derivative agreements of any nature with respect to the Voting
Securities (as defined herein). H Partners acknowledges and agrees that if (i) at any time H Partners ceases to have beneficial ownership and/or economic exposure (in the aggregate and in any combination) of or to at least 3% of the then
outstanding shares of Common Stock (as adjusted for any combinations, splits, recapitalizations or similar actions by the Company, the " <u>Minimum Ownership Requirement</u> ") or (ii) as determined by a final non-appealable judgment of a court of competent jurisdiction, Mr. Jaffer materially breaches any of his obligations under this Letter Agreement and such breach is not cured within ten (10) calendar days
after written notice from the Company

------

specifying the breach, H Partners shall (A) promptly notify the Company in writing of such event and (B) cause Mr. Jaffer to immediately tender his resignation from the Board, effective immediately. Concurrently with the execution and delivery of this Letter Agreement, Mr. Jaffer shall execute and deliver an irrevocable resignation in the form attached here to as <u>Exhibit A.</u> For the avoidance of doubt, the Company's obligations under <u>Section</u> <u>1(a</u>) and <u>Section</u> <u>1(e</u>) of this Letter Agreement shall automatically terminate upon (i) H Partners ceasing to meet the Minimum Ownership Requirement or (ii) any uncured material breach described in this <u>Section</u> <u>1(c</u>), as determined by a final, non-appealable judgment of a court of competent jurisdiction.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(d) Until the Standstill Termination Date (as defined herein), H Partners shall, or shall cause its representatives
to, appear in person or by proxy at any Stockholder Meeting (as defined herein) and 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, as such recommendations of the Board are set forth in the applicable definitive proxy statement filed in respect thereof with respect to (i) the election, removal and/or replacement of directors (other than any removal or
replacement of Mr. Jaffer) and (ii) any other proposal submitted to a vote of the stockholders; *provided, however,* (A) if either Institutional Shareholder Services, Inc. (" <u>ISS</u> ") or Glass
Lewis & Co., LLC (" <u>Glass Lewis</u> ") issue a voting recommendation that differs from the voting recommendation of the Board with respect to any Company-sponsored proposal submitted to stockholders (other than with respect to
the election of directors to the Board or the removal of directors from the Board), that H Partners shall be permitted (but not required) to vote in the same proportion as the vote of all other holders of shares of Common Stock; and (B) that H
Partners shall be permitted to vote in its sole discretion with respect to any proposal to approve an Extraordinary Transaction (as defined herein). Upon the Company's written request, H Partners shall provide the Company with written
confirmation and evidence of its compliance with this <u>Section</u> <u>1(d)</u> no later than two (2) business days prior to the applicable Stockholder Meeting; provided that such written request is received at least five
(5) business days in advance.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(e) The Company agrees that Mr. Jaffer shall receive (i) the same benefits of director and officer
insurance, and any indemnity and exculpation arrangements available generally to the directors of the Board and (ii) all Board notices and other Board materials that the other directors of the Company receive from the Company in the same manner
and form and at substantially the same time as the other directors on the Board.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(f) Prior to the Standstill Termination Date, H Partners shall not (including, without limitation, through other
persons) and shall cause its controlled affiliates, and its and their respective managing members, principals, partners (other than partners who are solely limited partners), directors, officers and employees not to, and will direct its agents and
representatives not to (at H Partners' direction or on H Partners' behalf), directly or indirectly, absent prior written consent by the Company or otherwise expressly permitted by this Letter Agreement:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(i) acquire, or offer or agree to acquire or acquire rights to acquire, directly or indirectly, by purchase, tender
or exchange offer, through the acquisition of control of another person, by joining a group, or otherwise or direct any Third Party in the acquisition of record or beneficial ownership of any Common Stock or engage in any swap or hedging transaction
or other derivative agreements of any nature with respect to any Voting Securities of the Company or any voting rights decoupled from the underlying Voting Securities, in each case, which would result in H Partners having aggregate beneficial
ownership of and/or economic exposure to more than 12.5% of the Common Stock outstanding at such time (the " <u>Ownership Cap</u> ");

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(ii) (A) nominate, recommend for nomination or give notice of an intent to nominate or recommend for nomination a
person for election at any Stockholder Meeting at which the Company's directors are to be elected; (B) knowingly initiate, encourage or participate in any solicitation of proxies in respect of any election contest or removal contest with
respect to the Company's directors; (C) submit, initiate, make or be a proponent of any stockholder proposal for consideration at, or bring any other business before, any Stockholder Meeting; (D) knowingly initiate, encourage or
participate in any solicitation of proxies in respect of any stockholder proposal for consideration at, or other business brought before any Stockholder Meeting; or (E) knowingly initiate, encourage or participate in any "withhold"
or similar campaign with respect to any Stockholder Meeting, in each case, other than in a manner consistent with the Board's recommendation in connection with such matter;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iii) form, join or in any way participate in, any group (within the meaning of Section 13(d) of the Exchange
Act), including in connection with any election or removal contest with respect to the Company's directors or any stockholder proposal or other business brought before any Stockholder Meeting (other than a group that includes all or some of
the members of H Partners, but does not include any other entities or persons that are not members of H Partners as of the date hereof);

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iv) seek publicly, alone or in concert with others, to amend any provisions of the Company's organizational
documents;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(v) engage in any solicitation (as defined herein) of proxies or consents with respect to the election or removal
of directors of the Company or any other matter or proposal or become a participant (as defined herein) in any such solicitation of proxies or consents;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(vi) (A) irrespective of whether (1) directly or indirectly or (2) alone or in concert with others,
institute, solicit, join or initiate any litigation, arbitration or other legal proceeding against the Company or any of its subsidiaries, its current or former directors or its officers (including derivative actions), each in their capacity as
such, (B) make any request for stock list materials or other books and records of the Company or any of its subsidiaries under Section 220 of the Delaware General Corporation Law or any other statutory or regulatory provisions providing
for stockholder access to books and records of the Company or its subsidiaries or their respective affiliates; or (C) make application or demand to a court or other person for an inspection, investigation or examination of the Company or its
subsidiaries or their respective affiliates; provided that nothing herein shall prevent Mr. Jaffer seeking in good faith to comply with his fiduciary duties under Delaware law from (v) bringing litigation to enforce the provisions of this
Letter Agreement, (w) making counterclaims with respect to any proceeding initiated by, or on behalf of, the Company against H Partners, (x) exercising statutory appraisal rights, (y) receiving damages or settlement proceeds like any
other stockholder in connection with any class action proceeding brought by a named plaintiff other than H Partners or (z) make a request under Section 220 of the General Corporation Law of the State of Delaware in his capacity as a
director of the Company;

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(vii) make or in any way knowingly participate in, knowingly facilitate or disclose support of, directly or
indirectly, any tender offer, exchange offer, merger, consolidation, acquisition, business combination, sale of a division, sale of all or substantially all assets, recapitalization, reorganization, restructuring, liquidation, dissolution, financing
or other extraordinary transaction involving the Company or any of its subsidiaries or its or their securities or assets, including any Change of Control Transaction (each, an " <u>Extraordinar</u> y <u>Transaction</u> ") (it being
understood that the foregoing shall not restrict H Partners from tendering shares, receiving payment for shares, voting shares or otherwise participating in any such transaction (that has not been initiated by H Partners) on the same basis as other
stockholders of the Company, or from participating in any such transaction that has been approved by the Board); or make, directly or indirectly, any proposal, either alone or in concert with others, to the Company or the Board that would reasonably
be expected to require or result in a public announcement regarding any of the types of matters set forth above in this paragraph;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(viii) make any proposal, announcement, statement or request that is public or is reasonably likely to become public
regarding: (A) controlling, changing or influencing the Board or management of the Company, including proposals to change the number or term of directors or to fill any vacancies on the Board; (B) any Extraordinary Transaction or
exploration thereof including any of the transactions referred to in clause (f)(vii) above (it being understood that this clause (f)(viii)(B) shall not restrict H Partners from tendering shares, receiving payment for shares, voting shares or
otherwise participating in any such transaction on the same basis as other stockholders of the Company, or from participating in any such transaction that has been approved by the Board); (C) any other change in the Company's or any of its
subsidiaries' operations, governance, business, corporate strategy, corporate structure, corporate affairs or policies, capital structure or allocation, or share repurchase or dividend policies; (D) causing the Company's Common
Stock to be delisted from, or to cease to be authorized to be quoted on, any securities exchange; or (E) causing the Company's Common Stock to become eligible for termination of registration pursuant to Section 12(g)(4) of the
Exchange Act;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(ix) (A) grant any proxy, consent or other authority to act as to any Voting Securities with respect to any matters
(other than to the Company's named proxies using the Company's proxy card); or (B) deposit any Voting Securities in a voting trust or subject any Voting Securities to a voting agreement or other arrangement of similar effect
(excluding customary brokerage accounts, margin accounts or prime brokerage accounts);

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(x) knowingly encourage or advise any Third Party or knowingly assist any Third Party in encouraging or advising
any other person (A) with respect to the giving or withholding of any proxy or consent relating to, or other authority to vote any Voting Securities; or (B) in conducting any type of referendum (binding or non-binding) (including any "withhold," "vote no" or similar campaign) relating to the Company (including for the avoidance of doubt with respect to the Company's management or
the Board) (other than such encouragement or advice that is consistent with the Board's recommendation in connection with such matter, or as otherwise specifically permitted under this Letter Agreement);

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(xi) engage in any short sale or any purchase, sale or grant of any option, warrant, convertible security, stock
appreciation right or other similar right (including any put or call option or "swap" transaction) with respect to any security (other than in connection with a broad-based market basket or index) that relates to or derives any part of
its value from any decline in the market price or value of any securities of the Company, if doing so would result in H Partners failing to have an aggregate Net Long Position in the Company;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(xii) other than in sale transactions on any stock exchange on which the Company's securities are then listed
or through a broker or dealer where the identity of the purchaser is not known, sell or agree to sell directly or indirectly, through swap or hedging transactions or otherwise, Common Stock or any derivatives (including swaps) relating to Common
Stock to any Third Party that (A) has filed a Schedule 13D (or amendment thereto) with respect to the Company, (B) has run or publicly announced an intention to run (or that the H Partners Parties or an affiliate thereof is aware has an
intention to run) or is an affiliate of a person that has publicly announced an intention to run (or that the H Partners Parties or an affiliate thereof is aware has an intention to run) a proxy contest or submitted stockholder nominations or
proposals with respect to any future stockholder meeting of the Company, or (C) would result in such Third Party, together with such Third Partys' Affiliates, owning, controlling or otherwise having any beneficial or other ownership
interest representing in the aggregate in excess of 3% of the shares of Common Stock outstanding at such time;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(xiii) enter into any negotiations, agreements or understandings with or advise, assist, facilitate, support,
encourage or seek to persuade any Third Party to take any action that H Partners is prohibited from taking pursuant to this <u>Section</u> <u>1(f)</u>;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(xiv) initiate any action challenging the validity or enforceability of this <u>Section</u> <u>1(f)</u> or this Letter Agreement; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(xv) seek or request an amendment, waiver or release of any of the provisions of this Letter Agreement; provided
that H Partners may make confidential requests to the Board for an amendment, waiver or release of any provision of this Letter Agreement, which the Board may accept or reject in its sole and absolute discretion, so long as any such request is not
publicly disclosed by H Partners (and is made by H Partners in a manner that would not reasonably be expected to require the public disclosure thereof by the Company, H Partners or any other person).

Notwithstanding the foregoing, the restrictions in this <u>Section</u> <u>1(f)</u> shall not (A) prevent H Partners or its representatives from making (i) any factual statement as required by applicable subpoena, legal process or other legal requirement from any governmental authority with competent jurisdiction over the party from whom information is sought (so long as such requirement did not arise as a result of action by H Partners) or (ii) any private communication to the Company, regarding any matter that would not reasonably be expected to trigger public disclosure obligations for any persons or result in any public disclosure of such communications, or (B) prevent H Partners from tendering shares, receiving payment for shares, voting shares or otherwise participating in any transaction on the same basis as the other stockholders of the Company or from participating in any such transaction that has been approved by the Board, subject to the other terms of this Letter Agreement or from making public statements regarding

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how it intends to vote, and the reasons therefor, with respect to any Change of Control Transaction involving the Company that has been publicly announced by the Company or from otherwise advocating in support of (or in opposition to) such Change of Control Transaction to which H Partners is not a party following its public announcement. Furthermore, for the avoidance of doubt, nothing in this Letter Agreement shall be deemed to restrict in any way Mr. Jaffer in the exercise of his fiduciary duties under applicable law as a director of the Company.

2. <u>Confidentiali</u> ty. Notwithstanding any applicable Company Policies or anything in this Letter Agreement to
the contrary, Mr. Jaffer may share confidential information regarding the Company with the persons described in and in accordance with and subject to a customary confidentiality agreement, which H Partners Management, LLC have entered into with
the Company concurrently herewith (the " <u>Confidentiality Agreement</u> ").

3. <u>Compliance with Securities Laws; Trading in Company Securities</u>. H Partners acknowledges its obligations
under U.S. securities laws and is aware that the U.S. securities laws may prohibit any person who has received from any issuer material non-public information from purchasing or selling securities of such
issuer or from communicating to any other person under circumstances which it is reasonably foreseeable that such person is likely to purchase or sell securities.

4. <u>Mutual Non-Disparagement</u>. Until the Standstill Termination Date,
the Company, on the one hand, and H Partners, on the other hand, shall each refrain from making, and shall cause their affiliates and representatives not to make, any public statement, whether written or oral and including any statements to
stockholders, analysts or representatives of the media, that constitutes an ad hominem attack on, or that otherwise disparages, defames, slanders, impugns or is reasonably likely to damage the reputation of H Partners or the Company, respectively,
or any of their respective affiliates and representatives. The foregoing shall not prevent the making of any factual statement in the event that the Company or any of its representatives or H Partners or any of its representatives is required to
make that statement by applicable subpoena, legal process or other legal requirement or from privately communicating such statement to the other Party, any directors or executive officers of the other Party, or any of H Partners' limited
partner investors or potential limited partner investors so long as such communications would not reasonably be expected to require or result in any public disclosure of such communications and, with respect to such private communications to H
Partners' current or potential limited partner investors, they are consistent with prior practice, are understood to be private communications and not undertaken with the intent to circumvent the restrictions in this Letter Agreement.

5. <u>Disclosure</u>. Neither the Company nor H Partners shall issue any press release or public announcement
regarding this Letter Agreement or the matters discussed herein or take any action that would require public disclosure thereof without the prior written consent of the other Party. H Partners acknowledges that the Company may file this Letter
Agreement as an exhibit to its Form 8-K and the Company agrees that H Partners will have a reasonable opportunity to review such Form 8-K in advance of filing and that
the Company will consider in good faith any changes requested by H Partners to the foregoing filing.

6. <u>Power and Authori</u> ty <u>of the Compan</u> y. The Company represents and warrants to H Partners that
(a) the Company has the corporate power and authority to execute this Letter Agreement and to bind it thereto, (b) this Letter Agreement has been duly and validly authorized, executed and delivered by the Company, constitutes a valid and
binding obligation and agreement of the Company, and is enforceable against the Company in accordance with its terms, and (c) the execution, delivery and performance of this Letter Agreement by the Company does not and will not violate or
conflict with (i) any law, rule, regulation, order, judgment or decree applicable to the Company or (ii) result in any breach or violation of or constitute a default (or an event which with notice or lapse of time or both could constitute
such a breach, violation or

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default) under or pursuant to, or result in the loss of a material benefit under, or give any right of termination, amendment, acceleration or cancellation of, any organizational document, agreement, contract, commitment, understanding or arrangement to which the Company is a party or by which it is bound.

7. <u>Power and Authori</u> ty <u>of H Partners</u>. H Partners represents and warrants to the Company that
(a) H Partners Management, LLC has the power and authority to execute this Letter Agreement on behalf of itself and to bind each member of H Partners thereto, (b) this Letter Agreement has been duly authorized, executed and delivered by
such member of H Partners, constitutes a valid and binding obligation of such member of H Partners and is enforceable against each such member of H Partners in accordance with its terms, and (c) the execution of this Letter Agreement by such
member of H Partners does not and will not violate or conflict with (i) any law, rule, regulation, order, judgment or decree applicable to such member of H Partners or (ii) result in any breach or violation of or constitute a default (or
an event which with notice or lapse of time or both could constitute such a breach, violation or default) under or pursuant to, or result in the loss of a material benefit under, or give any right of termination, amendment, acceleration or
cancellation of, any organizational document, agreement, contract, commitment, understanding or arrangement to which such member is a party or by which it is bound.

8. <u>Termination</u>.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) Unless otherwise mutually agreed to in writing by each party, this Agreement shall remain in effect 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 (the " <u>Standstill Termination Date</u> ").

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) Upon such termination, this Letter Agreement shall have no further force and effect. Notwithstanding the
foregoing, (i) the Company's obligations under <u>Sections 1(a</u>) and <u>1(e</u>) shall terminate upon any material breach of this Letter Agreement by H Partners upon ten (10) calendar days' written notice by the Company to H
Partners if such breach has not been cured within such notice period; *provided that* the Company is not in material breach of this Letter Agreement at the time such notice is given or prior to the end of the notice period, (ii) H
Partners' obligations under <u>Section</u> <u>1(f</u>) shall terminate upon any material breach of this Letter Agreement by the Company upon ten (10) calendar days' written notice by H Partners to the Company if such
breach has not been cured within such notice period; *provided that* H Partners is not in material breach of this Letter Agreement at the time such notice is given or prior to the end of the notice period and (iii) <u>Sections 8</u> to <u>18</u> shall survive termination of this Letter Agreement, and no termination of this Letter Agreement shall relieve any party of liability for any breach of this Letter Agreement arising prior to such termination.

9. <u>Counterparts</u>. This Letter Agreement may be executed in two or more counterparts, each of which will be
considered one and the same agreement and will become effective when counterparts have been signed by each of the Parties and delivered to the other Party (including by facsimile transmission, by electronic mail in "portable document
format" (".pdf") form, DocuSign or by any other electronic means intended to preserve the original graphic and pictorial appearance of a document).

10. <u>Specific Performance</u>. Each Party acknowledges and agrees that irreparable injury to the other Party
hereto would occur in the event that any of the provisions of this Letter Agreement were not performed in accordance with their specific terms or were otherwise breached and that money damages would not be an adequate remedy for such a breach. It is
accordingly agreed that each Party shall be entitled to enforcement of, and injunctive relief to prevent any violation of, the terms hereof. Each Party agrees to waive any bonding requirement under any applicable law, in the event that any other
party seeks to enforce the terms by way of equitable relief.

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11. <u>Applicable Law and Jurisdiction; Jury Waiver</u>. Each of the Company and H Partners (a) irrevocably
and unconditionally submits to the personal jurisdiction of the Delaware Court of Chancery in and for New Castle County, Delaware, or in the event (but only in the event) that such Delaware Court of Chancery does not have subject matter jurisdiction
over such matter, the federal, or other state courts located in Delaware, (b) agrees that it will not attempt to deny or defeat such personal jurisdiction by motion or other request for leave from any such courts, (c) agrees that any
actions or proceedings arising from this Letter Agreement shall be brought, tried, and determined only in such courts, (d) waives any claim of improper venue or any claim that those courts are an inconvenient forum and (e) agrees that it
will not bring any action arising from this Letter Agreement in any court other than the aforesaid courts. The Parties to this Letter Agreement agree that mailing of process or other papers in connection with any such action or proceeding in the
manner provided in <u>Section</u> <u>12</u> or in such other manner as may be permitted by applicable law as sufficient service of process, shall be valid and sufficient service thereof. **EACH PARTY HEREBY IRREVOCABLY WAIVES ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY LEGAL PROCEEDING ARISING OUT OF OR RELATED TO THIS LETTER AGREEMENT.** 

12. <u>Notice</u>. All notices, consents, requests, instructions, approvals and other communications provided for
herein and all legal process in regard hereto shall be in writing and shall be deemed validly given, made or served, (a) if given by email, when sent to the email address set forth below, as applicable (provided that there is no automated
return email indicating that the email address is no longer valid or active) or (b) if given by any other means, when actually received during normal business hours at the address specified in this section:

If to the Company:

Six Flags Entertainment Corporation

8701 Red Oak Blvd.

Charlotte, North Carolina 28217

Attention: Chief Legal & Compliance Officer and Corporate Secretary

With a copy to (which shall not constitute notice):

Weil, Gotshal & Manges LLP

767 5th Avenue

New York, New York 10153

Attention: Michael J. Aiello

Megan Pendleton

Email: michael.aiello@weil.com; megan.pendleton@weil.com

If to H Partners:

H Partners Management, LLC

888 7th Ave

New York, NY 10019

Attention: Rehan Jaffer; Lloyd Blumberg

Email: rjaffer@hpartnerslp.com; lblumberg@hpartnerslp.com

13. <u>Severability</u>. If at any time subsequent to the date hereof, any provision of this Letter Agreement is
held by any court of competent jurisdiction to be illegal, void, or unenforceable, such provision will be of no force and effect, but the illegality or unenforceability of such provision will have no effect upon the legality or enforceability of any
other provision of this Letter Agreement.

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14. <u>No Third-Party Beneficiaries</u>. This Letter Agreement is solely for the benefit of the Company and H
Partners and is not enforceable by any other persons. No Party to this Letter Agreement may assign its rights or delegate its obligations under this Letter Agreement, whether by operation of law or otherwise, without the prior written consent of the
other parties, and any assignment in contravention hereof will be null and void. Subject to the foregoing sentence, this Letter Agreement shall be binding upon, inure to the benefit of, and be enforceable by and against the permitted successors and
assigns of each Party.

15. <u>No Waiver</u>. No failure or delay by any Party in exercising any right or remedy hereunder will operate as
a waiver thereof, nor will any single or partial waiver thereof preclude any other or further exercise thereof or the exercise of any other right or remedy hereunder.

16. <u>Certain Definitions</u>. As used in this Letter Agreement: (a) the terms " <u>affiliate</u> "
and " <u>associate</u> " (and any plurals thereof) have the meanings ascribed to such terms under Rule 12b-2 promulgated by the SEC under the Exchange Act and shall include all persons or entities
that at any time prior to the Standstill Termination Date become associate(s) or affiliate(s) of any applicable person or entity referred to in this Letter Agreement; *provided, however*, that for purposes of this Letter Agreement, H Partners
and the Company shall not be associates or affiliates of one another; *provided, further*, that with respect to H Partners, the terms affiliate and associate shall not include any portfolio company of H Partners; (b) the terms
" <u>beneficial ownership</u>," "g <u>roup</u>," "p <u>articipant</u>," "p <u>erson</u>," "p <u>rox</u> y" and " <u>solicitation</u> " (and any plurals thereof) have the meanings
ascribed to such terms under the Exchange Act; *provided* that the meaning of "solicitation" shall be without regard to the exclusions set forth in Rules 14a-1(l)(2)(iv) and 14a-2 under the Exchange Act; (c) the term " <u>Exchange Act</u> " means the Securities Exchange Act of 1934, as amended, together with the rules and regulations promulgated thereunder; (d) the
term " <u>Change of Control Transaction</u> " means (i) any transaction pursuant to which any person becomes a beneficial owner, directly or indirectly, of securities of the Company representing more than 50% of the Company's
then-outstanding equity interests and voting power, (ii) any merger or stock-for-stock transaction with a Third Party whereby immediately after the consummation of
the transaction, the Company's stockholders retain less than 50% of the equity interests and voting power of the surviving entity's then-outstanding equity securities, or (iii) the sale of all or substantially all of the
Company's assets to a Third Party; (e) the term " <u>Net Long</u> <u>Position</u> " means such shares of Common Stock beneficially owned, directly or indirectly, that constitute such person's net long position as defined
in Rule 14e-4 under the Exchange Act *mutatis mutandis,* provided that "Net Long Position" shall not include any shares as to which such person does not have the right to vote or direct the
vote other than as a result of being in a margin account, or as to which such person has entered into a derivative or other agreement, arrangement or understanding that hedges or transfers to or from such person, in whole or in part, directly or
indirectly, any of the economic consequences of ownership of such shares; and the terms "person" or "persons, " for purposes of the meaning of the term "Net Long Position," shall mean any individual, corporation
(including not-for-profit), general or limited partnership, limited liability or unlimited liability company, joint venture, estate, trust, associate, organization or
other entity of any kind or nature; (f) the term " <u>representatives</u> " means (i) a person's affiliates and associates and (ii) its and their respective directors, officers, employees, partners, members, managers,
consultants, legal or other advisors, agents and other representatives acting in a capacity on behalf of, in concert with or at the direction of such person or its affiliates; (g) the term " <u>Stockholder Meeting</u> " means each
annual or special meeting of stockholders of the Company, or any action by written consent of the Company's stockholders in lieu thereof, and any adjournment, postponement, rescheduling or continuation thereof; (h) the term "Third
Party" refers to any person that is not a Party, a member of the Board, a director or officer of the Company, or legal counsel to either Party; and (i) the term " <u>Voting Securities</u> " means any shares of Common Stock or
any other securities of the Company entitled to vote in the election of directors.

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17. <u>Interpretation and Construction</u>. The Company and H Partners acknowledge that each Party has been
represented by counsel of its choice throughout all negotiations that have preceded the execution of this Letter Agreement, and that it has executed the same with the advice of said counsel. Each Party and its counsel cooperated and participated in
the drafting and preparation of this Letter Agreement and the documents referred to herein, and any and all drafts relating thereto exchanged among the Parties will be deemed the work product of all the Parties and may not be construed against any
Party by reason of its drafting or preparation. Accordingly, any rule of law or any legal decision that would require interpretation of any ambiguities in this Letter Agreement against any Party that drafted or prepared it is of no application and
is hereby expressly waived by the Company and H Partners, and any controversy over interpretations of this Letter Agreement will be decided without regard to events of drafting or preparation. Whenever (i) the words "include,"
"includes," or "including" are used in this Letter Agreement, they shall be deemed to be followed by the words "without limitation", (ii) the words "hereunder," "hereof,"
"hereto" and words of similar import are references to this Letter Agreement as a whole and not to any particular provision of this Letter Agreement, (iii) the word "or" is not exclusive, and (iv) references to
"Sections" in this Letter Agreement are references to Sections of this Letter Agreement unless otherwise indicated. The headings set forth in this Letter Agreement are for convenience of reference purposes only and shall not affect or be
deemed to affect in any way the meaning or interpretation of this Letter Agreement or any term or provision of this Letter Agreement.

18. <u>Entire Agreement</u>. This Letter Agreement, including <u>Exhibit A</u> attached to this Letter Agreement
and the Confidentiality Agreement, contain the entire understanding of the Parties with respect to the subject matter hereof. This Letter Agreement may be amended only by an agreement in writing executed by the Company and H Partners.

[*Signature Page Follows*]

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If the terms of this Letter Agreement are in accordance with your understanding, please sign below and this Letter Agreement will constitute a binding agreement among us.

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| | |
|:---|:---|
| **SIX FLAGS ENTERTAINMENT** | **SIX FLAGS ENTERTAINMENT** |
| **CORPORATION** | **CORPORATION** |
| By: | /s/ John Reilly |
| Name: | John Reilly |
| Title: | President & Chief Executive Officer |

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| | |
|:---|:---|
| Acknowledged and agreed to as of the date first written above: | Acknowledged and agreed to as of the date first written above: |
| **H PARTNERS MANAGEMENT, LLC** | **H PARTNERS MANAGEMENT, LLC** |
| By: | /s/ Rehan Jaffer |
| Name: | Rehan Jaffer |
| Title: | Managing Member |

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*[Signature Page to Letter Agreement]* 

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**EXHIBIT A** 

**FORM OF IRREVOCABLE RESIGNATION LETTER** 

May 19, 2026

Board of Directors

Six Flags Entertainment Corporation

8701 Red Oak Blvd.

Charlotte, North Carolina 28217

Re: Irrevocable Resignation

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Ladies and Gentlemen,

This letter is delivered pursuant to <u>Section</u> <u>1(c)</u> of the Cooperation Agreement, dated as of May 19, 2026 (the "<u>Letter Agreement</u>"), by and between the Company and H Partners. Capitalized terms used herein but not defined shall have the meaning set forth in the Letter Agreement.

I hereby irrevocably resign from my position as a director of the Company and from any and all committees of the Board on which I serve, subject to the Board's acceptance of this resignation, effective upon the earliest of (i) the date on which H Partners ceases to satisfy the Minimum Ownership Requirement and (ii) the date on which H Partners has been determined by a final non- appealable judgment of a court of competent jurisdiction to have materially breached any of its obligations under the Letter Agreement (and not cured such breach within ten (10) calendar days after written notice from the Company specifying such breach).

This resignation is irrevocable and may not be withdrawn by me at any time.

Name: Rehan Jaffer