Six Flags Entertainment Corp/OLD SEC filings SIX
Six Flags Entertainment Corp/OLD has 1,001 filings in SEC EDGAR's recent list, going back to Jul 13, 2011. Its latest annual report, Form 10-K, was filed on Feb 29, 2024 for the period ended Dec 31, 2023. The latest quarterly report (Form 10-Q) was filed on May 9, 2024, covering the quarter ended Mar 31, 2024. The most recent current report (Form 8-K) was filed on Jul 1, 2024 (material agreement, agreement ended, acquisition or sale of assets, listing notice, change to shareholder rights, regulation fd disclosure, other events). The company's fiscal year ends on December 29.
| Form | Description | Filed | Period |
|---|---|---|---|
| 15-12G | Deregistration | Jul 12, 2024 | — |
| 4 | Insider transaction | Jul 3, 2024 | Jul 1, 2024 |
| 4 | Insider transaction | Jul 3, 2024 | Jul 1, 2024 |
| 25-NSE | Delisting notice | Jul 2, 2024 | — |
| S-8 POS | Filing | Jul 2, 2024 | — |
| S-8 POS | Filing | Jul 2, 2024 | — |
| S-8 POS | Filing | Jul 2, 2024 | — |
| S-8 POS | Filing | Jul 2, 2024 | — |
| S-8 POS | Filing | Jul 2, 2024 | — |
| S-8 POS | Filing | Jul 2, 2024 | — |
| S-8 POS | Filing | Jul 2, 2024 | — |
| S-8 POS | Filing | Jul 2, 2024 | — |
| S-8 POS | Filing | Jul 2, 2024 | — |
| S-8 POS | Filing | Jul 2, 2024 | — |
| S-8 POS | Filing | Jul 2, 2024 | — |
| 4 | Insider transaction | Jul 1, 2024 | Jul 1, 2024 |
| 4 | Insider transaction | Jul 1, 2024 | Jul 1, 2024 |
| 4 | Insider transaction | Jul 1, 2024 | Jul 1, 2024 |
| 4 | Insider transaction | Jul 1, 2024 | Jul 1, 2024 |
| 4 | Insider transaction | Jul 1, 2024 | Jul 1, 2024 |
| 4 | Insider transaction | Jul 1, 2024 | Jul 1, 2024 |
| 4 | Insider transaction | Jul 1, 2024 | Jul 1, 2024 |
| 4 | Insider transaction | Jul 1, 2024 | Jul 1, 2024 |
| 8-K |
Current report
Material agreement, Agreement ended, Acquisition or sale of assets, Listing notice, Change to shareholder rights, Regulation FD disclosure, Other events
|
Jul 1, 2024 | Jul 1, 2024 |
| 425 | Filing | Jun 26, 2024 | — |
| 425 | Filing | Jun 26, 2024 | — |
| 8-K |
Current report
Other events
|
Jun 26, 2024 | Jun 26, 2024 |
| 425 | Filing | Jun 18, 2024 | — |
| 425 | Filing | Jun 18, 2024 | — |
| 8-K |
Current report
Other events
|
Jun 18, 2024 | Jun 18, 2024 |
| 4 | Insider transaction | May 22, 2024 | May 21, 2024 |
| 144 | Notice of proposed sale | May 21, 2024 | — |
| 4 | Insider transaction | May 9, 2024 | May 8, 2024 |
| 4 | Insider transaction | May 9, 2024 | May 8, 2024 |
| 4 | Insider transaction | May 9, 2024 | May 8, 2024 |
| 10-Q | Quarterly report | May 9, 2024 | Mar 31, 2024 |
| 4 | Insider transaction | May 9, 2024 | May 8, 2024 |
| 4 | Insider transaction | May 9, 2024 | May 8, 2024 |
| 8-K |
Current report
Results of operations
|
May 9, 2024 | May 9, 2024 |
| 8-K |
Current report
Material agreement, New debt, Regulation FD disclosure
|
May 2, 2024 | May 2, 2024 |
| 10-K/A | Amended annual report | Apr 29, 2024 | Dec 31, 2023 |
| 425 | Filing | Apr 16, 2024 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Apr 16, 2024 | Apr 16, 2024 |
| 425 | Filing | Apr 16, 2024 | — |
| 8-K |
Current report
Other events
|
Apr 16, 2024 | Apr 16, 2024 |
| 425 | Filing | Mar 12, 2024 | — |
| 425 | Filing | Mar 12, 2024 | — |
| 8-K |
Current report
Shareholder vote results
|
Mar 12, 2024 | Mar 12, 2024 |
| 425 | Filing | Mar 4, 2024 | — |
| 425 | Filing | Mar 4, 2024 | — |
| 8-K |
Current report
Other events
|
Mar 4, 2024 | Mar 4, 2024 |
| DEFA14A | Additional proxy material | Mar 4, 2024 | — |
| 10-K | Annual report | Feb 29, 2024 | Dec 31, 2023 |
| 8-K |
Current report
Results of operations
|
Feb 29, 2024 | Feb 29, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 13, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 12, 2024 | — |
| DEFM14A | Filing | Jan 31, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 23, 2024 | — |
| 425 | Filing | Jan 23, 2024 | — |
| 8-K |
Current report
Other events
|
Jan 23, 2024 | Jan 22, 2024 |
| 4 | Insider transaction | Dec 26, 2023 | Dec 20, 2023 |
| 4 | Insider transaction | Dec 22, 2023 | Dec 20, 2023 |
| 4 | Insider transaction | Dec 22, 2023 | Dec 20, 2023 |
| 425 | Filing | Dec 22, 2023 | — |
| 8-K |
Current report
Officer or director change
|
Dec 22, 2023 | Dec 20, 2023 |
| SC 13D/A | Amended ownership over 5% (active) | Nov 15, 2023 | — |
| 425 | Filing | Nov 13, 2023 | — |
| 8-K |
Current report
Other events
|
Nov 13, 2023 | Nov 9, 2023 |
| 10-Q | Quarterly report | Nov 13, 2023 | Oct 1, 2023 |
| 425 | Filing | Nov 3, 2023 | — |
| 425 | Filing | Nov 3, 2023 | — |
| 425 | Filing | Nov 3, 2023 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Nov 3, 2023 | Nov 3, 2023 |
| 425 | Filing | Nov 2, 2023 | — |
| 425 | Filing | Nov 2, 2023 | — |
| 425 | Filing | Nov 2, 2023 | — |
| 425 | Filing | Nov 2, 2023 | — |
| DEFA14A | Additional proxy material | Nov 2, 2023 | — |
| 425 | Filing | Nov 2, 2023 | — |
| 425 | Filing | Nov 2, 2023 | — |
| 8-K |
Current report
Results of operations
|
Nov 2, 2023 | Nov 2, 2023 |
| 8-K |
Current report
Material agreement, Regulation FD disclosure, Other events
|
Nov 2, 2023 | Nov 2, 2023 |
| 4 | Insider transaction | Sep 21, 2023 | Sep 20, 2023 |
| 144 | Notice of proposed sale | Sep 20, 2023 | — |
| 4 | Insider transaction | Sep 11, 2023 | Sep 8, 2023 |
| 144 | Notice of proposed sale | Sep 8, 2023 | — |
| 4 | Insider transaction | Aug 15, 2023 | Aug 11, 2023 |
| 10-Q | Quarterly report | Aug 11, 2023 | Jul 2, 2023 |
| 8-K/A |
Amended current report
Results of operations
|
Aug 11, 2023 | Aug 10, 2023 |
| 8-K |
Current report
Results of operations
|
Aug 10, 2023 | Aug 10, 2023 |
| 4 | Insider transaction | Jun 14, 2023 | Jun 13, 2023 |
| 4 | Insider transaction | Jun 12, 2023 | Jun 9, 2023 |
| 4 | Insider transaction | Jun 2, 2023 | Jun 1, 2023 |
| 4 | Insider transaction | May 30, 2023 | May 25, 2023 |
| 4 | Insider transaction | May 16, 2023 | May 12, 2023 |
| 4 | Insider transaction | May 12, 2023 | May 10, 2023 |
| 4 | Insider transaction | May 12, 2023 | May 10, 2023 |
| 4 | Insider transaction | May 12, 2023 | May 10, 2023 |
| 4 | Insider transaction | May 12, 2023 | May 10, 2023 |
| 4 | Insider transaction | May 12, 2023 | May 10, 2023 |
| 8-K |
Current report
Shareholder vote results, Other events
|
May 12, 2023 | May 10, 2023 |
| 4 | Insider transaction | May 11, 2023 | May 10, 2023 |
| 10-Q | Quarterly report | May 8, 2023 | Apr 2, 2023 |
| 8-K |
Current report
Results of operations
|
May 8, 2023 | May 8, 2023 |
| 8-K |
Current report
Material agreement, New debt, Other events
|
May 4, 2023 | May 4, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
Apr 26, 2023 | Apr 26, 2023 |
| 4 | Insider transaction | Apr 4, 2023 | Mar 8, 2023 |
| 4 | Insider transaction | Apr 4, 2023 | Mar 8, 2023 |
| 4 | Insider transaction | Apr 4, 2023 | Mar 8, 2023 |
| ARS | Annual report to shareholders | Mar 28, 2023 | Jan 1, 2023 |
| DEFA14A | Additional proxy material | Mar 28, 2023 | — |
| DEF 14A | Proxy statement | Mar 28, 2023 | — |
| PRE 14A | Preliminary proxy statement | Mar 17, 2023 | — |
| 8-K/A |
Amended current report
Officer or director change
|
Mar 10, 2023 | Jan 31, 2023 |
| 10-K | Annual report | Mar 7, 2023 | Jan 1, 2023 |
| NT 10-K | Notification of inability to timely file form 10-k | Mar 2, 2023 | Mar 2, 2023 |
| 8-K |
Current report
Results of operations
|
Mar 2, 2023 | Mar 2, 2023 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 13, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2023 | — |
| 4 | Insider transaction | Feb 2, 2023 | Jan 31, 2023 |
| 3 | Initial insider ownership | Feb 2, 2023 | Jan 31, 2023 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Jan 31, 2023 | Jan 31, 2023 |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 23, 2023 | — |
| 4 | Insider transaction | Dec 16, 2022 | Dec 14, 2022 |
| 4 | Insider transaction | Dec 12, 2022 | Dec 8, 2022 |
| 4 | Insider transaction | Dec 8, 2022 | Dec 6, 2022 |
| 4 | Insider transaction | Nov 22, 2022 | Nov 18, 2022 |
| 4 | Insider transaction | Nov 22, 2022 | Nov 18, 2022 |
| 4 | Insider transaction | Nov 22, 2022 | Nov 18, 2022 |
| SC 13G | Ownership over 5% (passive) | Nov 21, 2022 | — |
| 4 | Insider transaction | Nov 14, 2022 | Nov 11, 2022 |
| 4 | Insider transaction | Nov 14, 2022 | Nov 11, 2022 |
| SC 13D/A | Amended ownership over 5% (active) | Nov 14, 2022 | — |
| 10-Q | Quarterly report | Nov 10, 2022 | Oct 2, 2022 |
| 8-K |
Current report
Material agreement, Regulation FD disclosure
|
Nov 10, 2022 | Nov 10, 2022 |
| 8-K |
Current report
Results of operations
|
Nov 10, 2022 | Nov 10, 2022 |
| 8-K/A |
Amended current report
Officer or director change
|
Oct 5, 2022 | Sep 19, 2022 |
| 8-K |
Current report
Officer or director change
|
Sep 22, 2022 | Sep 19, 2022 |
| UPLOAD | Letter from the SEC | Sep 22, 2022 | — |
| 4 | Insider transaction | Sep 21, 2022 | Sep 19, 2022 |
| 3 | Initial insider ownership | Sep 21, 2022 | Sep 19, 2022 |
| 4 | Insider transaction | Sep 15, 2022 | Sep 13, 2022 |
| CORRESP | Letter to the SEC | Sep 14, 2022 | — |
| 4 | Insider transaction | Sep 14, 2022 | Sep 12, 2022 |
| 4 | Insider transaction | Sep 14, 2022 | Sep 12, 2022 |
| 4 | Insider transaction | Sep 8, 2022 | Sep 6, 2022 |
| 4 | Insider transaction | Sep 8, 2022 | Sep 6, 2022 |
| 4 | Insider transaction | Sep 8, 2022 | Sep 6, 2022 |
| 4 | Insider transaction | Aug 23, 2022 | Aug 19, 2022 |
| 4 | Insider transaction | Aug 23, 2022 | Aug 19, 2022 |
| UPLOAD | Letter from the SEC | Aug 19, 2022 | — |
| 8-K/A |
Amended current report
Officer or director change
|
Aug 17, 2022 | Jul 22, 2022 |
| 4 | Insider transaction | Aug 15, 2022 | Aug 12, 2022 |
| 4 | Insider transaction | Aug 15, 2022 | Aug 12, 2022 |
| SC 13D/A | Amended ownership over 5% (active) | Aug 15, 2022 | — |
| 10-Q | Quarterly report | Aug 11, 2022 | Jul 3, 2022 |
| 8-K |
Current report
Results of operations
|
Aug 11, 2022 | Aug 11, 2022 |
| SC 13G/A | Amended ownership over 5% (passive) | Aug 9, 2022 | — |
| 4 | Insider transaction | Aug 3, 2022 | Aug 1, 2022 |
| 3 | Initial insider ownership | Aug 3, 2022 | Aug 1, 2022 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Jul 28, 2022 | Jul 22, 2022 |
| 8-K |
Current report
Officer or director change
|
Jun 23, 2022 | Jun 20, 2022 |
| 4 | Insider transaction | Jun 16, 2022 | Jun 14, 2022 |
| 3 | Initial insider ownership | Jun 14, 2022 | Jun 13, 2022 |
| 4 | Insider transaction | Jun 14, 2022 | Jun 13, 2022 |
| 4 | Insider transaction | Jun 14, 2022 | Jun 10, 2022 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Jun 14, 2022 | Jun 13, 2022 |
| SC 13G/A | Amended ownership over 5% (passive) | Jun 9, 2022 | — |
| 4 | Insider transaction | Jun 2, 2022 | Jun 1, 2022 |
| 3 | Initial insider ownership | Jun 2, 2022 | Jun 1, 2022 |
| 4 | Insider transaction | May 31, 2022 | May 26, 2022 |
| 4 | Insider transaction | May 31, 2022 | May 26, 2022 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
May 31, 2022 | May 31, 2022 |
| 4 | Insider transaction | May 17, 2022 | May 13, 2022 |
| 4 | Insider transaction | May 17, 2022 | May 13, 2022 |
| 4 | Insider transaction | May 13, 2022 | May 11, 2022 |
| 4 | Insider transaction | May 13, 2022 | May 13, 2022 |
| 4 | Insider transaction | May 13, 2022 | May 13, 2022 |
| 4 | Insider transaction | May 13, 2022 | May 11, 2022 |
| 4 | Insider transaction | May 13, 2022 | May 13, 2022 |
| 10-Q | Quarterly report | May 12, 2022 | Apr 3, 2022 |
| 8-K |
Current report
Results of operations
|
May 12, 2022 | May 12, 2022 |
| 8-K |
Current report
Shareholder vote results
|
May 11, 2022 | May 11, 2022 |
| 4 | Insider transaction | May 9, 2022 | May 6, 2022 |
| 4 | Insider transaction | May 9, 2022 | May 6, 2022 |
| 3 | Initial insider ownership | Apr 1, 2022 | Mar 28, 2022 |
| DEFA14A | Additional proxy material | Mar 29, 2022 | — |
| DEF 14A | Proxy statement | Mar 29, 2022 | May 11, 2022 |
| PRE 14A | Preliminary proxy statement | Mar 18, 2022 | Mar 18, 2022 |
| 4 | Insider transaction | Mar 10, 2022 | Mar 8, 2022 |
| 3 | Initial insider ownership | Mar 4, 2022 | Feb 25, 2022 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Feb 28, 2022 | Feb 25, 2022 |
| 10-K | Annual report | Feb 24, 2022 | Jan 2, 2022 |
| 8-K |
Current report
Results of operations
|
Feb 24, 2022 | Feb 24, 2022 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 10, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 1, 2022 | — |
| 4 | Insider transaction | Dec 16, 2021 | Dec 14, 2021 |
| 4 | Insider transaction | Dec 15, 2021 | Dec 13, 2021 |
| 4 | Insider transaction | Dec 15, 2021 | Dec 13, 2021 |
| SC 13D/A | Amended ownership over 5% (active) | Dec 15, 2021 | — |
Showing 200 filings, the most recent 200. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Services-Miscellaneous Amusement & Recreation (SIC 7990)
- Fiscal year ends
- December 29
- Headquarters
- Arlington, TX
- SEC filer status
- Large accelerated filer
- SEC CIK
- 701374
- Former names
- Six Flags Entertainment Corp (until Jun 26, 2024); SIX FLAGS, INC. (until May 11, 2010); SIX FLAGS INC (until Mar 16, 2007); PREMIER PARKS INC (until Mar 10, 2000); TIERCO GROUP INC/DE/ (until Feb 2, 1994)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.