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Six Flags Entertainment (FUN) 10K Form and Latest SEC Filings 2026

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$18.16 +0.50 (+2.81%)
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Latest Six Flags Entertainment SEC Filings & Recent Activity

Six Flags Entertainment (NYSE:FUN) has submitted 146+ documents to the U.S. Securities and Exchange Commission (SEC) since 2023. For investors, these filings are the primary source of verified financial data — covering everything from annual revenue and debt levels in the 10-K, to material business events in 8-K current reports, to insider buying and selling activity in Form 4 disclosures. Key figures from these filings, including revenue, earnings, and cash flow, are summarized in Six Flags Entertainment's financial statements. The most recent filing was a Form SCHEDULE 13G submitted on April 29, 2026.

Form 4
Six Flags Entertainment Corporation/NEW Reports Ownership Change on Apr. 20, 2026

Form 4 filings disclose changes in stock ownership by company insiders, including purchases, sales, grants, and option exercises.

View insider ownership

8-K
Six Flags Entertainment Files Current Report on Apr. 8, 2026

An 8-K is filed when a material corporate event occurs, such as an acquisition, leadership change, or financial update.

View filing

10-Q
Six Flags Entertainment Files Quarterly Report on Nov. 7, 2025

The 10-Q contains Six Flags Entertainment's unaudited quarterly financial statements, revenue, earnings updates, and cash flow changes between annual reports.

View earnings history

Six Flags Entertainment SEC Filing History

Browse Six Flags Entertainment's complete SEC filing history using the filters below. Filter by form type - 10-K, 10-Q, 8-K, Form 4, and more - or set a custom date range to find a filing.

DateFilerForm TypeView
04/29/2026 2:20 PM
Six Flags Entertainment (1999001) Subject
VANGUARD PORTFOLIO MANAGEMENT LLC (2100121) Filed by
Form SCHEDULE 13G
04/20/2026 4:48 PM
HADDRILL RICHARD M (1201647) Reporting
Six Flags Entertainment (1999001) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
04/09/2026 3:35 PM
Six Flags Entertainment (1999001) Filer
Form ARS
04/09/2026 3:33 PM
Six Flags Entertainment (1999001) Filer
Form DEF 14A
04/08/2026 8:15 PM
Six Flags Entertainment (1999001) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
04/06/2026 5:11 PM
HADDRILL RICHARD M (1201647) Reporting
Six Flags Entertainment (1999001) Issuer
Form 3
Initial statement of beneficial ownership of securities  
04/06/2026 3:29 PM
Six Flags Entertainment (1999001) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
03/25/2026 4:19 PM
Six Flags Entertainment (1999001) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
03/13/2026 3:22 PM
Six Flags Entertainment (1999001) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
03/05/2026 7:58 AM
Six Flags Entertainment (1999001) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
02/25/2026 3:19 PM
Dieckmann Christian (2028666) Reporting
Six Flags Entertainment (1999001) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
02/25/2026 3:19 PM
FISHER TIM (1726117) Reporting
Six Flags Entertainment (1999001) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
02/25/2026 3:20 PM
Nurse Brian (1751349) Reporting
Six Flags Entertainment (1999001) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
02/25/2026 3:20 PM
Hoffman David R. (1522836) Reporting
Six Flags Entertainment (1999001) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
02/25/2026 3:20 PM
Six Flags Entertainment (1999001) Issuer
Tastepe Tayfun (2028519) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
02/25/2026 3:21 PM
Six Flags Entertainment (1999001) Issuer
Witherow Brian C (1301638) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
02/19/2026 6:28 AM
Six Flags Entertainment (1999001) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
02/13/2026 1:37 PM
DARLINGTON PARTNERS CAPITAL MANAGEMENT, LP (1854440) Filed by
Six Flags Entertainment (1999001) Subject
Form SCHEDULE 13G/A
02/12/2026 11:25 AM
MORGAN STANLEY (895421) Filed by
Six Flags Entertainment (1999001) Subject
Form SCHEDULE 13G/A
01/23/2026 3:10 PM
Six Flags Entertainment (1999001) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
01/14/2026 3:11 PM
Six Flags Entertainment (1999001) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
01/06/2026 6:41 AM
Six Flags Entertainment (1999001) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
01/05/2026 4:27 PM
Six Flags Entertainment (1999001) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
01/05/2026 3:18 PM
BASSOUL SELIM A (1246380) Reporting
Six Flags Entertainment (1999001) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
12/29/2025 3:13 PM
CARR LOUIS (1832656) Reporting
Six Flags Entertainment (1999001) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
12/23/2025 3:25 PM
Six Flags Entertainment (1999001) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
11/07/2025 1:56 PM
Six Flags Entertainment (1999001) Filer
Form 10-Q
General form for quarterly reports under Section 13 or 15(d)  
11/07/2025 10:56 AM
MORGAN STANLEY (895421) Filed by
Six Flags Entertainment (1999001) Subject
Form SCHEDULE 13G
11/07/2025 6:03 AM
Six Flags Entertainment (1999001) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
10/27/2025 5:29 PM
Brudnick Jonathan A. (2092404) Reporting
Ferguson Scott D. (1658919) Reporting
Sachem Head Capital Management LP (1582090) Reporting
Sachem Head GP LLC (1658917) Reporting
Six Flags Entertainment (1999001) Issuer
Uncas GP LLC (1658906) Reporting
Form 3
Initial statement of beneficial ownership of securities  
10/17/2025 3:10 PM
Six Flags Entertainment (1999001) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
10/10/2025 3:23 PM
Six Flags Entertainment (1999001) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
09/12/2025 5:15 AM
Six Flags Entertainment (1999001) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
08/25/2025 4:23 PM
FISHER TIM (1726117) Reporting
Six Flags Entertainment (1999001) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
08/22/2025 3:34 PM
Six Flags Entertainment (1999001) Filer
Form 8-K/A
08/14/2025 12:34 PM
DARLINGTON PARTNERS CAPITAL MANAGEMENT, LP (1854440) Filed by
Six Flags Entertainment (1999001) Subject
Form SCHEDULE 13G/A
08/08/2025 4:52 PM
Hoffman Steven E (2074840) Reporting
Six Flags Entertainment (1999001) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
08/06/2025 7:30 AM
Six Flags Entertainment (1999001) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
08/06/2025 7:40 AM
Six Flags Entertainment (1999001) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
06/27/2025 5:30 PM
COCHRAN SANDRA B (1056610) Reporting
Six Flags Entertainment (1999001) Issuer
Form 3
Initial statement of beneficial ownership of securities  
06/27/2025 5:31 PM
COCHRAN SANDRA B (1056610) Reporting
Six Flags Entertainment (1999001) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
06/27/2025 5:18 PM
Colglazier Michael A (1817756) Reporting
Six Flags Entertainment (1999001) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
06/27/2025 5:18 PM
Dutra Felipe (1841076) Reporting
Six Flags Entertainment (1999001) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
06/27/2025 5:07 PM
Colglazier Michael A (1817756) Reporting
Six Flags Entertainment (1999001) Issuer
Form 3
Initial statement of beneficial ownership of securities  
06/27/2025 5:08 PM
Dutra Felipe (1841076) Reporting
Six Flags Entertainment (1999001) Issuer
Form 3
Initial statement of beneficial ownership of securities  
06/27/2025 5:16 PM
Hoffman Steven E (2074840) Reporting
Six Flags Entertainment (1999001) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
06/27/2025 5:04 PM
Olivet D Scott (1241093) Reporting
Six Flags Entertainment (1999001) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
06/27/2025 5:05 PM
Hoffman Steven E (2074840) Reporting
Six Flags Entertainment (1999001) Issuer
Form 3
Initial statement of beneficial ownership of securities  
06/27/2025 12:33 PM
Six Flags Entertainment (1999001) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
06/24/2025 3:33 PM
SAULS MONICA (1968605) Reporting
Six Flags Entertainment (1999001) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
06/05/2025 5:01 PM
Six Flags Entertainment (1999001) Issuer
Witherow Brian C (1301638) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
06/05/2025 5:06 PM
Nurse Brian (1751349) Reporting
Six Flags Entertainment (1999001) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
06/05/2025 5:11 PM
Hoffman David R. (1522836) Reporting
Six Flags Entertainment (1999001) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
06/05/2025 5:16 PM
FISHER TIM (1726117) Reporting
Six Flags Entertainment (1999001) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
06/05/2025 5:21 PM
Dieckmann Christian (2028666) Reporting
Six Flags Entertainment (1999001) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
06/05/2025 4:57 PM
Six Flags Entertainment (1999001) Issuer
Zimmerman Richard (1411422) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
05/20/2025 7:45 AM
Six Flags Entertainment (1999001) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
05/12/2025 5:29 PM
Frymire Michelle M (1861740) Reporting
Six Flags Entertainment (1999001) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
05/08/2025 7:49 AM
Six Flags Entertainment (1999001) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
(Data available from 1/1/2016 forward)

Six Flags Entertainment SEC Filings - Frequently Asked Questions

Six Flags Entertainment (FUN) has submitted 146+ filings to the SEC since 2023. You can browse the complete history or filter by form type using the tools above.

Six Flags Entertainment's fiscal year ends on December 31. The company typically files its 10-K annual report by the end of February, covering the prior fiscal year's financial results. Key financial data from these reports is available on Six Flags Entertainment's financial statements page.

The most recent filing was a Form SCHEDULE 13G submitted on April 29, 2026. View the full filing using the link above.

SEC Filing Types: 10-K, 10-Q, 8-K and More

SEC filings are legally required disclosures that public companies submit to the U.S. Securities and Exchange Commission. Unlike press releases or earnings call transcripts, these documents are filed under legal obligation — meaning the financial data they contain is audited, standardized, and subject to penalties if materially false. For investors, that makes SEC filings the most reliable primary source available for evaluating a company's true financial position.

Yes. All SEC filings are publicly available through the SEC's EDGAR database and on financial research platforms like MarketBeat. Companies are required by law to make these disclosures accessible to all investors — meaning retail investors have access to the same source documents as institutional analysts.

A 10-K is an annual report containing audited financial statements and a full review of the company's business — it is the most comprehensive filing a company makes each year. A 10-Q is a shorter, unaudited quarterly update filed three times per year between annual reports. Investors typically use the 10-K for deep fundamental analysis and the 10-Q to track whether the company is on pace with its guidance mid-year.

The most important filing for fundamental investors. Filed once per year, the 10-K contains audited financial statements, revenue and earnings trends, debt obligations, risk factors, and management's own assessment of the business. Reading the risk factors section and comparing year-over-year financials can reveal issues that don't show up in analyst summaries.

An unaudited financial update filed three times per year (the 10-K covers Q4). Investors use 10-Qs to track whether guidance is on pace, monitor changes in cash flow or inventory, and catch any mid-year shifts in business conditions before they become headline news.

Filed within four business days of a material event — earnings releases, merger announcements, executive departures, or major asset sales. Because 8-Ks are filed before media coverage catches up, they are often the fastest way to get unfiltered information directly from the company on market-moving events.

Filed within two business days whenever an executive or director buys or sells company stock. Insider purchases — especially large or clustered buys — are often interpreted as a signal of management confidence. Insider selling is more ambiguous but worth monitoring for patterns, particularly around lock-up expirations or ahead of major announcements.


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This page (NYSE:FUN) was last updated on 5/5/2026 by MarketBeat.com Staff.
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