Cover	12 Months Ended
Cover	Dec. 31, 2025
Document Information [Line Items]
Document Type	DEF 14A
Amendment Flag	false
Entity Information [Line Items]
Entity Registrant Name	Six Flags Entertainment Corporation/NEW
Entity Central Index Key	0001999001

Pay vs Performance Disclosure - USD ($)

12 Months Ended

Dec. 31, 2025

Dec. 31, 2024

Dec. 31, 2023

Dec. 31, 2022

Dec. 31, 2021

Pay vs Performance Disclosure

Pay vs Performance Disclosure, Table

PAY VERSUS PERFORMANCE



(a)	(b)		(c)		(d)		(e)		(f)		(g)		(h)		(i)		(j)			(k)

													Value of Initial Fixed $100 Investment Based On:

Year	Summary Compensation Table Total for PEO #1 (1)		Compensation Actually Paid to PEO #1 (1)		Summary Compensation Table Total for PEO #2 (1)		Compensation Actually Paid to PEO #2 (1)		Average Summary Compensation Table Total for Non-PEO NEOs (2)		Average Compensation Actually Paid to Non- PEO NEOs (2)		Total Stockholder Return (3)		Peer Group Total Stockholder Return (TSR) (3)		Net Income (Loss) (in thousands) (4)			Adjusted EBITDA (in thousands) (4)(5)
2025	$	17,931,119	$	4,458,935	$	5,782,054	$	7,428,472	$	4,277,852	$	1,391,587	$	27.95	$	86.21	$	(1,549,466	)	$	792,010
2024	$	9,113,602	$	16,356,818	$	20,358,969	$	20,103,189	$	3,081,041	$	4,467,664	$	87.79	$	110.36	$	(206,665	)	$	875,291
2023	$	6,535,516	$	5,806,727		—		—	$	1,848,506	$	1,603,003		—		—	$	124,559		$	527,672
2022	$	7,285,782	$	8,372,850		—		—	$	3,013,407	$	3,296,205		—		—	$	307,668		$	551,953
2021 (6)	$	9,991,165	$	10,624,247		—		—	$	2,933,892	$	2,962,471		—		—	$	(48,518	)	$	324,641

(1)

Mr. Zimmerman was the primary executive officer (PEO #1) in all periods presented as the Former Chief Executive Officer of the

combined

Company and legacy Cedar Fair. For 2025, Mr. Reilly has also been included as a primary executive officer (PEO #2) as he was hired to replace Mr. Zimmerman in December 2025. For 2024, Mr. Bassoul has also been included as a primary executive officer (PEO #2) as he was the primary executive officer of legacy Six Flags prior to the Merger. Compensation Actually Paid to Mr. Zimmerman, Mr. Reilly and Mr. Bassoul is derived from the Summary Compensation Table total for each fiscal year by making the following deductions and additions for the periods presented:


PEO#1		2025			2024			2023			2022			2021

Summary Compensation Table total	$	17,931,119		$	9,113,602		$	6,535,516		$	7,285,782		$	9,991,165

Less:

Grant date fair value of awards reported in Summary Compensation Table		(8,500,020	)		(6,846,877	)		(4,999,979	)		(4,375,035	)		(6,716,340	)

Plus:

Fair value of awards granted during the current year that were outstanding and unvested as of the end of the fiscal year		—			8,916,451			4,682,828			5,439,517			6,473,209

Change in fair value of awards granted in prior years that were outstanding and unvested as of the end of the fiscal year		—			5,678,266			(785,718	)		(318,879	)		596,903

Change in fair value of awards granted in prior years that vested in the fiscal year		(7,928,357	)		(655,375	)		305,629			315,429			115,847

Grant date fair value of awards that were granted and vested in the same year		2,956,193			—			—			—			163,463

Distributions paid on restricted unit awards in the fiscal year		—			150,751			68,451			26,036			—

Compensation Actually Paid	$	4,458,935		$	16,356,818		$	5,806,727		$	8,372,850		$	10,624,247

PEO#2		2025			2024			2023			2022			2021

Summary Compensation Table total	$	5,782,054		$	20,358,969		$	—		$	—		$	—

Less:

Grant date fair value of awards reported in Summary Compensation Table		(5,709,725	)		(15,125,995	)		—			—			—

Plus:

Fair value of awards granted during the current year that were outstanding and unvested as of the end of the fiscal year		7,356,143			3,144,398			—			—			—

Change in fair value of awards granted in prior years that were outstanding and unvested as of the end of the fiscal year		—			—			—			—			—

Change in fair value of awards granted in prior years that vested in the fiscal year		—			—			—			—			—

Grant date fair value of awards that were granted and vested in the same year		—			11,725,817			—			—			—

Distributions paid on restricted unit awards in the fiscal year		—			—			—			—			—

Compensation Actually Paid	$	7,428,472		$	20,103,189		$	—		$	—		$	—

(2)

The 2025

non-primary

executive officer named executive officers

(“Non-PEO

NEOs”) included Messrs. Witherow, Fisher, Nurse, Bassoul and White and Ms. Sauls. The 2024

non-primary

executive officer named executive officers included Messrs. Witherow, Fisher, Nurse, White, and Mick. The 2023

Non-PEO

NEOs included Messrs. Witherow, Fisher, and Nurse, Ms. Sauls, and Kelley Ford, Former Executive Vice President and Chief Marketing Officer. The 2022

Non-PEO

NEOs included Messrs. Witherow, Fisher and Nurse and Ms. Ford. The 2021

Non-PEO

NEOs included Messrs. Witherow and Fisher, Ms. Ford, Mr. Craig Heckman, former Executive Vice President, Human Resources, and Mr. Duffield Milkie, former Executive Vice President and General Counsel. Compensation Actually Paid to

Non-

PEO

NEOs is derived from the average Summary Compensation Table Total for each fiscal year by making the following deductions and additions for the periods presented:


Non-PEO NEOs		2025			2024			2023			2022			2021

Summary Compensation Table total	$	4,277,852		$	3,081,041		$	1,848,506		$	3,013,407		$	2,933,892

Less:

Grant date fair value of awards reported in Summary Compensation Table		(1,583,333	)		(1,965,689	)		(1,137,933	)		(1,678,512	)		(1,551,155	)

Plus:

Fair value of awards granted during the current year that were outstanding and unvested as of the end of the fiscal year		143,651			1,689,262			940,386			1,925,121			1,188,835

Change in fair value of awards granted in prior years that were outstanding and unvested as of the end of the fiscal year		(1,067,429	)		1,294,732			(153,589	)		(109,154	)		279,877

Change in fair value of awards granted in prior years that vested in the fiscal year		(533,559	)		(124,659	)		75,117			128,793			60,055

Grant date fair value of awards that were granted and vested in the same year		154,405			451,765			—			—			50,967

Distributions paid on restricted unit awards in the fiscal year		—			41,212			30,516			16,550			—

Compensation Actually Paid	$	1,391,587		$	4,467,664		$	1,603,003		$	3,296,205		$	2,962,471

(3)

Consistent with

Regulation

S-K

Section 203(e)(3), the amounts set forth under the headings “Total Shareholder Return” and “Peer Group Total Shareholder Return” reflect the value of a hypothetical initial investment of $100 made on July 2, 2024 (the date that the Company’s common stock was registered under Section 12 of the Exchange Act) into, with respect to Company Total Shareholder Return, the Company, and with respect to Peer Group Total Shareholder Return, S&P Leisure Facilities Index. Because the class of Company securities currently registered under Section 12 of the Exchange Act is not the same class of Company securities that was registered in the periods prior to the Merger (including fiscal years 2023, 2022 and 2021), neither Company Total Shareholder Return nor Peer Group Total Shareholder Return are presented for such periods.

(4)

Legacy Cedar Fair has been determined to be the accounting acquirer for financial statement purposes. Accordingly, net income (loss) and Adjusted EBITDA reflect combined operations for July 1, 2024 through December 31, 2024 and fiscal year 2025, and include only legacy Cedar Fair’s results (before giving effect to the Merger) for 2021 through 2023 and the first six months of 2024.

(5)

Adjusted EBITDA represents earnings before interest, taxes, depreciation, amortization, other

non-cash

items, and adjustments as defined in our credit agreement, minus net income attributable to

non-controlling

interests. See the discussion under Compensation Discussion and Analysis – Compensation Performance Measures. Adjusted EBITDA is reported as the Company-selected measure but may not have been the most important measure for prior periods and the Company-selected measure may be a different measure in future years.

(6)	The COVID-19 pandemic had a material impact on our business in 2021.

Company Selected Measure Name

Adjusted EBITDA

Named Executive Officers, Footnote

(2)

The 2025

non-primary

executive officer named executive officers

(“Non-PEO

NEOs”) included Messrs. Witherow, Fisher, Nurse, Bassoul and White and Ms. Sauls. The 2024

non-primary

executive officer named executive officers included Messrs. Witherow, Fisher, Nurse, White, and Mick. The 2023

Non-PEO

NEOs included Messrs. Witherow, Fisher, and Nurse, Ms. Sauls, and Kelley Ford, Former Executive Vice President and Chief Marketing Officer. The 2022

Non-PEO

NEOs included Messrs. Witherow, Fisher and Nurse and Ms. Ford. The 2021

Non-PEO

Non-

PEO

Peer Group Issuers, Footnote

(3)

Consistent with

Regulation

S-K

Adjustment To PEO Compensation, Footnote


PEO#1		2025			2024			2023			2022			2021

Summary Compensation Table total	$	17,931,119		$	9,113,602		$	6,535,516		$	7,285,782		$	9,991,165

Less:

Grant date fair value of awards reported in Summary Compensation Table		(8,500,020	)		(6,846,877	)		(4,999,979	)		(4,375,035	)		(6,716,340	)

Plus:

Fair value of awards granted during the current year that were outstanding and unvested as of the end of the fiscal year		—			8,916,451			4,682,828			5,439,517			6,473,209

Change in fair value of awards granted in prior years that were outstanding and unvested as of the end of the fiscal year		—			5,678,266			(785,718	)		(318,879	)		596,903

Change in fair value of awards granted in prior years that vested in the fiscal year		(7,928,357	)		(655,375	)		305,629			315,429			115,847

Grant date fair value of awards that were granted and vested in the same year		2,956,193			—			—			—			163,463

Distributions paid on restricted unit awards in the fiscal year		—			150,751			68,451			26,036			—

Compensation Actually Paid	$	4,458,935		$	16,356,818		$	5,806,727		$	8,372,850		$	10,624,247

PEO#2		2025			2024			2023			2022			2021

Summary Compensation Table total	$	5,782,054		$	20,358,969		$	—		$	—		$	—

Less:

Grant date fair value of awards reported in Summary Compensation Table		(5,709,725	)		(15,125,995	)		—			—			—

Plus:

Fair value of awards granted during the current year that were outstanding and unvested as of the end of the fiscal year		7,356,143			3,144,398			—			—			—

Change in fair value of awards granted in prior years that were outstanding and unvested as of the end of the fiscal year		—			—			—			—			—

Change in fair value of awards granted in prior years that vested in the fiscal year		—			—			—			—			—

Grant date fair value of awards that were granted and vested in the same year		—			11,725,817			—			—			—

Distributions paid on restricted unit awards in the fiscal year		—			—			—			—			—

Compensation Actually Paid	$	7,428,472		$	20,103,189		$	—		$	—		$	—

Non-PEO NEO Average Total Compensation Amount

$ 4,277,852

$ 3,081,041

$ 1,848,506

$ 3,013,407

$ 2,933,892

Non-PEO NEO Average Compensation Actually Paid Amount

$ 1,391,587

4,467,664

1,603,003

3,296,205

2,962,471

Adjustment to Non-PEO NEO Compensation Footnote

NEOs is derived from the average Summary Compensation Table Total for each fiscal year by making the following deductions and additions for the periods presented:


Non-PEO NEOs		2025			2024			2023			2022			2021

Summary Compensation Table total	$	4,277,852		$	3,081,041		$	1,848,506		$	3,013,407		$	2,933,892

Less:

Grant date fair value of awards reported in Summary Compensation Table		(1,583,333	)		(1,965,689	)		(1,137,933	)		(1,678,512	)		(1,551,155	)

Plus:

Fair value of awards granted during the current year that were outstanding and unvested as of the end of the fiscal year		143,651			1,689,262			940,386			1,925,121			1,188,835

Change in fair value of awards granted in prior years that were outstanding and unvested as of the end of the fiscal year		(1,067,429	)		1,294,732			(153,589	)		(109,154	)		279,877

Change in fair value of awards granted in prior years that vested in the fiscal year		(533,559	)		(124,659	)		75,117			128,793			60,055

Grant date fair value of awards that were granted and vested in the same year		154,405			451,765			—			—			50,967

Distributions paid on restricted unit awards in the fiscal year		—			41,212			30,516			16,550			—

Compensation Actually Paid	$	1,391,587		$	4,467,664		$	1,603,003		$	3,296,205		$	2,962,471

Compensation Actually Paid vs. Total Shareholder Return

Relationship Between Company TSR and “Compensation Actually Paid”

For the year ended December 31, 2025, our TSR decreased from $87.79 to $27.95. The “Compensation Actually Paid” to our PEO #1, PEO #2 and

non-PEO

NEOs (on average) in 2025, were $4,458,935, $7,428,472 and $1,391,587, respectively. We use financial metrics in our incentive plans, each of which may indirectly impact our stock price. Accordingly, as the Company’s stock price increases (and TSR likewise increases), we would expect the value of a named executive officer’s long-term incentives to generally increase in correlation. Similarly, as the Company’s stock price decreases, we would expect the value of a named executive officer’s long-term incentives to generally decrease in correlation as it did in 2025 for our PEO #1 and

non-PEO

NEOs. The “Compensation Actually Paid” to our PEO #2 was primarily awarded in December 2025 upon the hiring of our PEO #2.

Compensation Actually Paid vs. Net Income

Relationship Between Net Income and Adjusted EBITDA and “Compensation Actually

Paid

”

The chart below reflects the relationship between the Compensation Actually Paid to our PEO #1, PEO #2 and

non-PEO

NEOs and net income (loss) and Adjusted EBITDA. Legacy Cedar Fair has been determined to be the accounting acquirer for financial statement purposes. Accordingly, net income (loss) and Adjusted EBITDA reflect combined operations for July 1, 2024 through December 31, 2024 and fiscal year 2025, and include only legacy Cedar Fair’s results (before giving effect to the Merger) for 2021 through 2023 and the first six months of 2024. In addition, the

COVID-19

pandemic had a material impact on our business in 2021.

Compensation Actually Paid vs. Company Selected Measure

Relationship Between Net Income and Adjusted EBITDA and “Compensation Actually

Paid

”

The chart below reflects the relationship between the Compensation Actually Paid to our PEO #1, PEO #2 and

non-PEO

COVID-19

pandemic had a material impact on our business in 2021.

Total Shareholder Return Vs Peer Group

Comparison Between Company TSR and Peer Group TSR

For the year ended December 31, 2025, our TSR decreased 68%, and the TSR of the S&P Leisure Facilities Index decreased 22% over the same period.

Tabular List, Table

Most Important Financial Measures

The below tabular list identifies the financial measures deemed by the People, Culture & Compensation Committee to be the most important financial measures for linking the compensation of the Company’s named executive officers to the performance of the Company. See the discussion

under

Compensation Discussion and Analysis - Compensation Performance Measures

for their definitions.

MOST IMPORTANT FINANCIAL MEASURES

•

Adjusted EBITDA

•

Constant Currency Modified EBITDA before incentive compensation expense

•

Un-levered

Pre-Tax

Free Cash Flow

Total Shareholder Return Amount

$ 27.95

87.79

Peer Group Total Shareholder Return Amount

86.21

110.36

Net Income (Loss)

$ (1,549,466,000)

$ (206,665,000)

$ 124,559,000

$ 307,668,000

$ (48,518,000)

Company Selected Measure Amount

792,010,000

875,291,000

527,672,000

551,953,000

324,641,000

Measure:: 1

Pay vs Performance Disclosure

Name

Adjusted EBITDA

Non-GAAP Measure Description

(5)

Adjusted EBITDA represents earnings before interest, taxes, depreciation, amortization, other

non-cash

items, and adjustments as defined in our credit agreement, minus net income attributable to

non-controlling

Measure:: 2

Pay vs Performance Disclosure

Name

Constant Currency Modified EBITDA before incentive compensation expense

Measure:: 3

Pay vs Performance Disclosure

Name

Un-levered Pre-Tax Free Cash Flow

Zimmerman [Member]

Pay vs Performance Disclosure

PEO Total Compensation Amount

$ 17,931,119

$ 9,113,602

$ 6,535,516

$ 7,285,782

$ 9,991,165

PEO Actually Paid Compensation Amount

$ 4,458,935

16,356,818

5,806,727

8,372,850

10,624,247

PEO Name

Mr. Zimmerman

Bassoul [Member]

Pay vs Performance Disclosure

PEO Total Compensation Amount

20,358,969

PEO Actually Paid Compensation Amount

$ 20,103,189

PEO Name

Mr. Bassoul

Reilly [Member]

Pay vs Performance Disclosure

PEO Total Compensation Amount

$ 5,782,054

PEO Actually Paid Compensation Amount

$ 7,428,472

PEO Name

Mr. Reilly

PEO | Zimmerman [Member] | Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

$ (8,500,020)

$ (6,846,877)

(4,999,979)

(4,375,035)

(6,716,340)

PEO | Zimmerman [Member] | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

8,916,451

4,682,828

5,439,517

6,473,209

PEO | Zimmerman [Member] | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

5,678,266

(785,718)

(318,879)

596,903

PEO | Zimmerman [Member] | Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

2,956,193

163,463

PEO | Zimmerman [Member] | Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

(7,928,357)

(655,375)

305,629

315,429

115,847

PEO | Zimmerman [Member] | Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

150,751

68,451

26,036

PEO | Bassoul [Member] | Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

(15,125,995)

PEO | Bassoul [Member] | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

3,144,398

PEO | Bassoul [Member] | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

PEO | Bassoul [Member] | Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

11,725,817

PEO | Bassoul [Member] | Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

PEO | Bassoul [Member] | Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

PEO | Reilly [Member] | Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

(5,709,725)

PEO | Reilly [Member] | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

7,356,143

PEO | Reilly [Member] | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

PEO | Reilly [Member] | Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

PEO | Reilly [Member] | Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

PEO | Reilly [Member] | Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

Non-PEO NEO | Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

(1,583,333)

(1,965,689)

(1,137,933)

(1,678,512)

(1,551,155)

Non-PEO NEO | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

143,651

1,689,262

940,386

1,925,121

1,188,835

Non-PEO NEO | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

(1,067,429)

1,294,732

(153,589)

(109,154)

279,877

Non-PEO NEO | Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

154,405

451,765

50,967

Non-PEO NEO | Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

(533,559)

(124,659)

75,117

128,793

60,055

Non-PEO NEO | Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

$ 0

$ 41,212

$ 30,516

$ 16,550

$ 0

Award Timing Disclosure	12 Months Ended
Award Timing Disclosure	Dec. 31, 2025
Award Timing Disclosures [Line Items]
Award Timing MNPI Disclosure	Long-Term Incentive Compensation We give greater weighting to long-term awards than to short-term compensation opportuni ties . We use these awards because we believe they give key employees a vested interest in our growth and performance, and they directly align key employees’ interests with those of our stockholders. We also believe that the vesting schedules aid us in retaining executives and motivating superior performance over the long term. Our 2024 Omnibus Incentive Plan allows us to grant stock options, stock appreciation rights, restricted stock awards, restricted stock units (including performance stock units), other awards and dividend equivalent rights. We do not grant option awards and, therefore, the Company does not have a policy on the timing of awarding options in relation to the disclosure of material nonpublic information. 2025 Long-Term Incentive Compensation Awards Our 2025 long-term incentive awards included performance stock units and time-based restricted stock: The new hire grants that we made to Mr. Reilly are discussed separately under “Initial Equity Grants to Mr. Reilly” below. We did not grant equity awards to Mr. Bassoul in 2025.
Award Timing Predetermined	true
MNPI Disclosure Timed for Compensation Value	false

Insider Trading Policies and Procedures	12 Months Ended
Insider Trading Policies and Procedures	Dec. 31, 2025
Insider Trading Policies and Procedures [Line Items]
Insider Trading Policies and Procedures Adopted	true