SEC filingsOct 12, 2026 to Oct 19, 2026: insiders reported 840 purchases and sales across 212 companies.840 insider purchases and sales in 7 daysSee the filings →
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Company profile

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Six Flags Entertainment Corporation
NYSEConsumer Discretionary

Latest close: 8.11 USD · Oct 16, 2026 · 1 year · split-adjusted

On the price, the facts of the public record■Insider buy□Insider sell●Results filed
With an account, also○dividends▲splits◌next earningswith an account

End-of-day prices provided by Twelve Data · One close per session; the series does not update during the trading day.

Latest on record

The most recent facts, as filed.

Up to three of the most recent, checkable facts already loaded on this page, each linked to its source.

  1. Aug 12, 2026Reported purchase · Form 4John T Reilly, President & CEO · $248.3KOpen the filing ↗
  2. Aug 6, 2026Quarterly report · 10-QFiled by the company itself.Open the filing ↗
  3. Aug 6, 2026Material event · 8-KFiled by the company itself.Open the filing ↗

In numbers

What this profile holds, counted.

Closes · 1 year250
SEC filings on record22020 flagged findings
Reported transactions (Form 4)55since Mar 26, 2025 · and 28 other holdings
Corporate events (8-K)30since Jul 1, 2024

What the record says

Description, identity and filings, each with its source.

Every block cites its source. The colour of a finding marks its category — which document, who filed it — not how much it matters.

What the company does

Six Flags Entertainment Corporation is an American multinational amusement park company headquartered in Charlotte, North Carolina, with administrative offices in Sandusky, Ohio, and Arlington, Texas. It was formed on July 1, 2024, through the merger of Cedar Fair and the former Six Flags company. The company has 34 properties in North America, including 20 amusement parks and 14 water parks with nine on-site resorts. The company also manages two parks in Saudi Arabia.

Source: Wikipedia (CC BY-SA 4.0) · copied on Sep 3, 2026 · may not reflect recent changes.

SEC topics

Regulatory history

Topics detected in its SEC reports, with the original excerpt.

Each topic is assigned by a classifier over the full filing; the excerpts show where it was detected and are not always enough to verify it. Open the filing to read it in full.

  • 2024-07-02merger or acquisition eventstaleOpen filing ↗
    “…SEC on August 30, 2002, which registered the offer and sale of 4,830,000 Units, issuable pursuant to the Cedar Fair, L.P. 2000 Equity…”
    +1 more passage from the same document
    • “…Units, issuable pursuant to the Cedar Fair, L.P. 2000 Equity Incentive Plan. On July 1, 2024 (the “ Closing Date ”), Six Flags…”
  • 2024-07-02merger or acquisition eventstaleOpen filing ↗
    “…SEC on August 30, 2002, which registered the offer and sale of 4,830,000 Units, issuable pursuant to the Cedar Fair, L.P. 2000 Equity…”
    +1 more passage from the same document
    • “…Units, issuable pursuant to the Cedar Fair, L.P. 2000 Equity Incentive Plan. On July 1, 2024 (the “ Closing Date ”), Six Flags…”
  • 2024-07-01listing compliance noticestaleOpen filing ↗
    “…included in public filings, disclosures made during negotiations, correspondence between the parties and disclosure schedules to the…”
    +1 more passage from the same document
    • “…during negotiations, correspondence between the parties and disclosure schedules to the Merger Agreement. Accordingly, the…”
  • 2024-07-01merger or acquisition eventstaleOpen filing ↗
    “…for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐…”
    +1 more passage from the same document
    • “…provided pursuant to Section 13(a) of the Exchange Act. ☐ Item 2.01. Completion of Acquisition or Disposition of Assets. On…”
  • 2024-06-26merger or acquisition eventstaleOpen filing ↗
    “…mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial…”
    +1 more passage from the same document
    • “…not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant…”
  • 2024-06-18merger or acquisition eventstaleOpen filing ↗
    “…check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial…”
    +1 more passage from the same document
    • “…occur on July 1, 2024 (the “Expected Closing Date”), and also that the Six Flags Board of Directors declared a special dividend in…”

Original excerpts from SEC filings, untranslated. Not advice and not a prediction.

SEC record

SEC dossier

What this company has filed with the SEC, in plain language.

The 25 most recent filings (of 220)

Everything filed

Every SEC filing, newest first, with what it is. Below, each type with its own explanation.

  • Aug 14, 26SCHEDULE 13G/A ↗Passive stake · Darlington Partners Capital Management, LP · 7.5% · event on Jun 30, 26 · amendment
  • Aug 12, 26Form 4 ↗Insider transaction
  • Aug 6, 2610-Q ↗Quarterly report
  • Aug 6, 268-K ↗Current report · Results
  • Insider transaction · 3 Form 4 filingsshow all 3hide
  • Jul 30, 26SCHEDULE 13G/A ↗Passive stake · BlackRock, Inc. · 14.4% · event on Jun 30, 26 · amendment
  • Jul 17, 26Form 3 ↗Insider transaction
  • Jul 2, 268-K ↗Current report · A senior executive left or was appointed
  • Jul 1, 268-K ↗Current report · A senior executive left or was appointed
  • Insider transaction · 6 Form 4 filingsshow all 6hide
  • Jun 17, 26Form 3 ↗Insider transaction
  • Jun 16, 26Form 4 ↗Insider transaction
  • Jun 3, 26Form 3 ↗Insider transaction
  • May 27, 268-K ↗Current report · Shareholder vote results
  • Insider transaction · 2 Form 3 filingsshow all 2hide
  • May 27, 268-K ↗Current report · A senior executive left or was appointed
  • May 26, 26Form 4 ↗Insider transaction

220 filings on record, the oldest from Nov 2, 23.

Listing the 25 most recent filings of the 220 on record.

8-Ks, explained

Stress1Structure14Governance18
  • Governance3 senior executive changes2026show all 3hide
    • Jul 2, 26GovernanceA senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
    • Jul 1, 26GovernanceA senior executive left or was appointed8-K 5.02 ↗
    • May 27, 26GovernanceA senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
  • May 20, 26StructureEntered a material agreement+2 more in the same filing8-K 1.01 ↗
  • Governance3 senior executive changes2026show all 3hide
    • May 7, 26GovernanceA senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
    • Mar 25, 26GovernanceA senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
    • Mar 13, 26GovernanceA senior executive left or was appointed8-K 5.02 ↗
  • Structure3 material agreements entered2026show all 3hide
    • Mar 5, 26StructureEntered a material agreement+2 more in the same filing8-K 1.01 ↗
    • Jan 23, 26StructureEntered a material agreement+1 more in the same filing8-K 1.01 ↗
    • Jan 14, 26StructureEntered a material agreement+2 more in the same filing8-K 1.01 ↗
  • Governance3 senior executive changes2025 – 2026show all 3hide
    • Jan 5, 26GovernanceA senior executive left or was appointed8-K 5.02 ↗
    • Dec 23, 25GovernanceA senior executive left or was appointed8-K 5.02 ↗
    • Nov 24, 25GovernanceA senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
  • Oct 17, 25StructureEntered a material agreement+3 more in the same filing8-K 1.01 ↗
  • Oct 10, 25GovernanceA senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
  • Aug 6, 25GovernanceA senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
  • Structure3 material agreements entered2024 – 2025show all 3hide
    • Jun 27, 25StructureEntered a material agreement+2 more in the same filing8-K 1.01 ↗
    • Mar 10, 25StructureEntered a material agreement+3 more in the same filing8-K 1.01 ↗
    • Dec 23, 24StructureEntered a material agreement8-K 1.01 ↗
  • Oct 15, 24GovernanceA senior executive left or was appointed8-K 5.02 ↗
  • Jul 8, 24GovernanceA senior executive left or was appointed8-K 5.02 ↗
  • Jul 1, 24StructureEntered a material agreement+10 more in the same filing8-K12B 1.01 ↗

Notable in the record

Stress disclosures older than the timeline above. They are individual events from the record, not a complete timeline: there may be more between them.

  • Jul 1, 24StressListing notice (8-K 3.01)+10 more in the same filing8-K12B 3.01 ↗

The full record holds 1 stress filing.

Corporate events are tracked from 2004-08-23, when the SEC renumbered 8-K items. Earlier filings use an incompatible numbering and are not classified here.

Ownership and control

Schedule 13D: stake and stated purpose

Filed by holders above 5% of a share class who cannot use the short form. It includes the investor's stated purpose: read it before assuming they seek influence.

  • Rehan Jaffer5.0%Apr 3, 25SCHEDULE 13D/A ↗2 co-filers on this document — the figure is the largest single stake, not their sum.

Schedule 13G: short-form filing

The short form, for holders who meet specific requirements: institutional investors, passive investors without a control purpose, or exempt investors. Asset managers and index funds usually file it.

  • BlackRock, Inc.14.4%Jun 30, 26SCHEDULE 13G/A ↗
  • The Vanguard Group10.0%Dec 31, 24SCHEDULE 13G/A ↗
  • Darlington Partners Capital Management, LP7.5%Jun 30, 26SCHEDULE 13G/A ↗5 co-filers on this document — the figure is the largest single stake, not their sum. · 5 earlier filings
  • Morgan Stanley5.4%Mar 31, 26SCHEDULE 13G/A ↗2 co-filers on this document — the figure is the largest single stake, not their sum. · 2 earlier filings
  • Vanguard Portfolio Management5.1%Mar 31, 26SCHEDULE 13G ↗

Structured 13D/G data starts 2023-12, when the SEC moved these filings to a machine-readable format. Earlier filings exist but are not parsed here.

SEC record

Insider transactions

Buys and sells reported by officers, directors and major shareholders on SEC Form 4.

Buys and sells

  • Aug 12, 26Buy$248KJohn T ReillyPresident & CEO↗
  • Jun 15, 26Buy$2.9MREHAN JAFFER↗
  • Jun 12, 26Buy$3.0MREHAN JAFFER↗
  • May 21, 26Buy$48KMarilyn G Spiegel↗
  • May 12, 26Buy$48KMarilyn G Spiegel↗
  • May 12, 26Buy$191KRICHARD M HADDRILLExecutive Chair↗
  • Aug 7, 25Buy$123KSteven E Hoffman↗
  • Aug 7, 25Buy$125KSteven E Hoffman↗
Stock compensation, tax and giftsshow the 32 other transactionshide

Stock compensation, tax withholding, option exercises and gifts. They are listed separately and are not included in the purchase and sale totals. The type describes the transaction, not the filer's intent.

  • Jul 29, 26Compensationamount n/aChristopher Lawrence BennettChief Legal Officer↗
  • Jul 29, 26Compensationamount n/aDavid R. HoffmanChief Accounting Officer↗
  • Jul 29, 26Compensationamount n/aAshok WaliaChief Financial Officer↗
  • Jun 25, 26Compensationamount n/aChristopher Lawrence BennettChief Legal Officer↗
  • Jun 25, 26Compensationamount n/aDavid R. HoffmanChief Accounting Officer↗
  • Jun 25, 26Compensationamount n/aJohn T ReillyPresident & CEO↗
  • Jun 25, 26Compensationamount n/aTayfun TastepeChief Digital & Tech Officer↗
  • Jun 25, 26Compensationamount n/aZiegenfuss Amy MartinChief Marketing Officer↗
  • Jun 25, 26Compensationamount n/aAshok WaliaChief Financial Officer↗
  • Apr 16, 26Compensationamount n/aRICHARD M HADDRILLExecutive Chair↗
  • Feb 23, 26Tax$71KChristian DieckmannChief Commercial Officer↗
  • Feb 23, 26Tax$348KTIM FISHERChief Operating Officer↗
  • Feb 23, 26Tax$205KBrian NurseChief Legal Officer↗
  • Feb 23, 26Tax$87KDavid R. HoffmanChief Accounting Officer↗
  • Feb 23, 26Tax$66KTayfun TastepeChief Digital & Tech Officer↗
  • Feb 23, 26Tax$300KBrian C WitherowChief Financial Officer↗
  • Jan 2, 26Compensationamount n/aFelipe Dutra↗
  • Jan 2, 26Compensationamount n/aJennifer Mason↗
  • Dec 31, 25Compensationamount n/aDaniel J Hanrahan↗
  • Dec 31, 25Other$110KDaniel J Hanrahan↗
  • Dec 31, 25Compensationamount n/aSELIM A BASSOULExecutive Chairman↗
  • Dec 31, 25Tax$1.7MSELIM A BASSOULExecutive Chairman↗
  • Dec 24, 25Compensationamount n/aLOUIS CARR↗
  • Dec 24, 25Other$51KLOUIS CARR↗
  • Dec 8, 25Compensationamount n/aJohn T ReillyPresident & CEO↗
  • Dec 5, 25Tax$1.8MRichard ZimmermanPresident & CEO↗
  • Dec 5, 25Compensationamount n/aRichard ZimmermanPresident & CEO↗
  • Dec 5, 25Tax$2.0MRichard ZimmermanPresident & CEO↗
  • Aug 22, 25Tax$559KTIM FISHERChief Operating Officer↗
  • Jun 25, 25Compensationamount n/aD Scott Olivet↗
  • Jun 25, 25Compensationamount n/aSteven E Hoffman↗
  • Jun 25, 25Compensationamount n/aFelipe Dutra↗

The full record holds 94 transactions and goes back to Jul 1, 24.

Its sector and its market

Six Flags Entertainment Corporation among Consumer Discretionary companies

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Coverage

What sits behind this page.

Where each figure comes from and how far it reaches.

Prices
End-of-day closes provided by Twelve Data. One close per session; not real time. Closes adjusted for splits.
Series quality
250 clean closes in the period.
SEC records
220 documents on file, from Nov 2, 2023 to Aug 14, 2026.
Company description
Wikipedia, read on Sep 3, 2026.
This page
Generated on Oct 19, 2026; refreshed through the day.

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Which SEC documents appear here?

Those filed with the SEC by the company, its insiders and its major shareholders, within our coverage: periodic reports (10-K, 10-Q, 20-F), material events (8-K), proposed sale notices (Form 144), insider transactions (Form 4) and stakes above 5% (13D/13G). Each links to the original on EDGAR.

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