Six Flags Entertainment Corporation/NEW SEC EDGAR Filings (CIK 0001999001)

SEC EDGAR filings, ownership reports, and insider transactions for Six Flags Entertainment Corporation/NEW.

Symbol
FUN on NYSE
Industry
Services Amusement & Recreation Services (Office Of Trade & Services)
Business address
8701 Red Oak Blvd., Charlotte, NC, 28217
State of incorporation
DE
Fiscal year end
31 December
Former names
CopperSteel HoldCo, Inc. (to 26 Jun 2024)
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Six Flags Entertainment Corporation/NEW has filed 181 SEC EDGAR filings since 02 Nov 2023

Latest Filings

Recent SEC filings for Six Flags Entertainment Corporation/NEW including 8-K, 10-K, 4 and more.

Form type Document Filing Description Filing date Reporting date File number(s)
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 05 Mar 2026 05 Mar 2026 001-42157
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K ANNUAL REPORT ON FORM 10-K 26 Feb 2026 31 Dec 2025 001-42157
4 Open 4 document View SEC filing for 4 FORM 4 25 Feb 2026 23 Feb 2026
4 Open 4 document View SEC filing for 4 FORM 4 25 Feb 2026 23 Feb 2026
4 Open 4 document View SEC filing for 4 FORM 4 25 Feb 2026 23 Feb 2026
4 Open 4 document View SEC filing for 4 FORM 4 25 Feb 2026 23 Feb 2026
4 Open 4 document View SEC filing for 4 FORM 4 25 Feb 2026 23 Feb 2026
4 Open 4 document View SEC filing for 4 FORM 4 25 Feb 2026 23 Feb 2026
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K Q4 2025 EARNINGS RELEASE ON FORM 8-K 19 Feb 2026 19 Feb 2026 001-42157
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 13 Feb 2026 005-94553
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 12 Feb 2026 005-94553
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 23 Jan 2026 21 Jan 2026 001-42157
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 14 Jan 2026 14 Jan 2026 001-42157
4 Open 4 document View SEC filing for 4 FORM 4 06 Jan 2026 02 Jan 2026
4 Open 4 document View SEC filing for 4 FORM 4 06 Jan 2026 02 Jan 2026
4 Open 4 document View SEC filing for 4 FORM 4 06 Jan 2026 02 Jan 2026
4 Open 4 document View SEC filing for 4 FORM 4 06 Jan 2026 02 Jan 2026
4 Open 4 document View SEC filing for 4 FORM 4 06 Jan 2026 02 Jan 2026
4 Open 4 document View SEC filing for 4 FORM 4 06 Jan 2026 02 Jan 2026
4 Open 4 document View SEC filing for 4 FORM 4 06 Jan 2026 02 Jan 2026
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 06 Jan 2026 06 Jan 2026 001-42157
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 05 Jan 2026 05 Jan 2026 001-42157
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 05 Jan 2026 29 Dec 2025 001-42157
4 Open 4 document View SEC filing for 4 FORM 4 05 Jan 2026 31 Dec 2025
4 Open 4 document View SEC filing for 4 FORM 4 05 Jan 2026 31 Dec 2025
4 Open 4 document View SEC filing for 4 FORM 4 29 Dec 2025 24 Dec 2025
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 23 Dec 2025 17 Dec 2025 001-42157
4 Open 4 document View SEC filing for 4 FORM 4 09 Dec 2025 08 Dec 2025
3 Open 3 document View SEC filing for 3 FORM 3 09 Dec 2025 08 Dec 2025
4 Open 4 document View SEC filing for 4 FORM 4 09 Dec 2025 05 Dec 2025
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 24 Nov 2025 21 Nov 2025 001-42157
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 07 Nov 2025 28 Sep 2025 001-42157
SCHEDULE 13G Open SCHEDULE 13G document View SEC filing for SCHEDULE 13G 07 Nov 2025 005-94553
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K Q3 2025 EARNINGS RELEASE ON FORM 8-K 07 Nov 2025 07 Nov 2025 001-42157
3 Open 3 document View SEC filing for 3 OWNERSHIP DOCUMENT 27 Oct 2025 17 Oct 2025
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 17 Oct 2025 17 Oct 2025 001-42157
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 10 Oct 2025 10 Oct 2025 001-42157
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 12 Sep 2025 12 Sep 2025 001-42157
4 Open 4 document View SEC filing for 4 FORM 4 25 Aug 2025 22 Aug 2025
8-K/A Open 8-K/A document | Open XBRL data View SEC filing for 8-K/A 8-K/A 22 Aug 2025 25 Jun 2025 001-42157
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 14 Aug 2025 005-94553
4 Open 4 document View SEC filing for 4 FORM 4 08 Aug 2025 07 Aug 2025
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 06 Aug 2025 29 Jun 2025 001-42157
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 06 Aug 2025 06 Aug 2025 001-42157
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K Q2 2025 EARNINGS RELEASE ON FORM 8-K 06 Aug 2025 06 Aug 2025 001-42157
4 Open 4 document View SEC filing for 4 FORM 4 27 Jun 2025 25 Jun 2025
3 Open 3 document View SEC filing for 3 FORM 3 27 Jun 2025 25 Jun 2025
4 Open 4 document View SEC filing for 4 FORM 4 27 Jun 2025 25 Jun 2025
4 Open 4 document View SEC filing for 4 FORM 4 27 Jun 2025 25 Jun 2025
4 Open 4 document View SEC filing for 4 FORM 4 27 Jun 2025 25 Jun 2025
3 Open 3 document View SEC filing for 3 FORM 3 27 Jun 2025 25 Jun 2025
3 Open 3 document View SEC filing for 3 FORM 3 27 Jun 2025 25 Jun 2025
3 Open 3 document View SEC filing for 3 FORM 3 27 Jun 2025 25 Jun 2025
4 Open 4 document View SEC filing for 4 FORM 4 27 Jun 2025 25 Jun 2025
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 27 Jun 2025 27 Jun 2025 001-42157
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 27 Jun 2025 25 Jun 2025 001-42157
4 Open 4 document View SEC filing for 4 FORM 4 24 Jun 2025 20 Jun 2025
4 Open 4 document View SEC filing for 4 FORM 4 05 Jun 2025 04 Jun 2025
4 Open 4 document View SEC filing for 4 FORM 4 05 Jun 2025 04 Jun 2025
4 Open 4 document View SEC filing for 4 FORM 4 05 Jun 2025 04 Jun 2025
4 Open 4 document View SEC filing for 4 FORM 4 05 Jun 2025 04 Jun 2025
4 Open 4 document View SEC filing for 4 FORM 4 05 Jun 2025 04 Jun 2025
4 Open 4 document View SEC filing for 4 FORM 4 05 Jun 2025 04 Jun 2025
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 20 May 2025 20 May 2025 001-42157
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 15 May 2025 005-94553
4 Open 4 document View SEC filing for 4 FORM 4 12 May 2025 12 May 2025
144 Open 144 document View SEC filing for 144 12 May 2025 001-42157
ARS Open ARS document View SEC filing for ARS ARS 09 May 2025 31 Dec 2024 001-42157
DEF 14A Open DEF 14A document | Open XBRL data View SEC filing for DEF 14A DEF 14A 09 May 2025 25 Jun 2025 001-42157
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 08 May 2025 30 Mar 2025 001-42157
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K Q1 2025 EARNINGS RELEASE ON FORM 8-K 08 May 2025 08 May 2025 001-42157
4 Open 4 document View SEC filing for 4 FORM 4 06 May 2025 02 May 2025
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 01 May 2025 01 May 2025 001-42157
10-K/A Open 10-K/A document | Open XBRL data View SEC filing for 10-K/A 10-K/A 29 Apr 2025 31 Dec 2024 001-42157
SCHEDULE 13D/A Open SCHEDULE 13D/A document View SEC filing for SCHEDULE 13D/A 14 Apr 2025 005-94553
4 Open 4 document View SEC filing for 4 FORM 4 02 Apr 2025 31 Mar 2025
4 Open 4 document View SEC filing for 4 FORM 4 02 Apr 2025 31 Mar 2025
4 Open 4 document View SEC filing for 4 FORM 4 02 Apr 2025 31 Mar 2025
4 Open 4 document View SEC filing for 4 FORM 4 02 Apr 2025 31 Mar 2025
4 Open 4 document View SEC filing for 4 FORM 4 02 Apr 2025 31 Mar 2025
4 Open 4 document View SEC filing for 4 FORM 4 02 Apr 2025 31 Mar 2025
4 Open 4 document View SEC filing for 4 FORM 4 02 Apr 2025 31 Mar 2025
4 Open 4 document View SEC filing for 4 FORM 4 02 Apr 2025 31 Mar 2025
4 Open 4 document View SEC filing for 4 FORM 4 02 Apr 2025 31 Mar 2025
4 Open 4 document View SEC filing for 4 FORM 4 28 Mar 2025 26 Mar 2025
4 Open 4 document View SEC filing for 4 FORM 4 28 Mar 2025 26 Mar 2025
4 Open 4 document View SEC filing for 4 FORM 4 28 Mar 2025 26 Mar 2025
4 Open 4 document View SEC filing for 4 FORM 4 28 Mar 2025 26 Mar 2025
4 Open 4 document View SEC filing for 4 FORM 4 28 Mar 2025 26 Mar 2025
4 Open 4 document View SEC filing for 4 FORM 4 28 Mar 2025 26 Mar 2025
4 Open 4 document View SEC filing for 4 FORM 4 28 Mar 2025 26 Mar 2025
4 Open 4 document View SEC filing for 4 FORM 4 28 Mar 2025 26 Mar 2025
4 Open 4 document View SEC filing for 4 FORM 4 28 Mar 2025 26 Mar 2025
4 Open 4 document View SEC filing for 4 FORM 4 18 Mar 2025 14 Mar 2025
144 Open 144 document View SEC filing for 144 14 Mar 2025 001-42157
SCHEDULE 13G Open SCHEDULE 13G document View SEC filing for SCHEDULE 13G 11 Mar 2025 005-94553
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 10 Mar 2025 10 Mar 2025 001-42157
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K ANNUAL REPORT ON FORM 10-K 03 Mar 2025 31 Dec 2024 001-42157
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K Q4 2024 EARNINGS RELEASE ON FORM 8-K 27 Feb 2025 27 Feb 2025 001-42157
4 Open 4 document View SEC filing for 4 FORM 4 26 Feb 2025 24 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 26 Feb 2025 24 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 26 Feb 2025 24 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 26 Feb 2025 24 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 26 Feb 2025 24 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 26 Feb 2025 24 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 26 Feb 2025 24 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 26 Feb 2025 24 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 26 Feb 2025 24 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 07 Feb 2025 05 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 07 Feb 2025 05 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 07 Feb 2025 05 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 07 Feb 2025 05 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 07 Feb 2025 05 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 07 Feb 2025 05 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 07 Feb 2025 05 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 07 Feb 2025 05 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 07 Feb 2025 05 Feb 2025
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 24 Jan 2025 24 Jan 2025 001-42157
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 08 Jan 2025 005-94553
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 23 Dec 2024 17 Dec 2024 001-42157
4 Open 4 document View SEC filing for 4 FORM 4 16 Dec 2024 13 Dec 2024
4 Open 4 document View SEC filing for 4 FORM 4 06 Dec 2024 04 Dec 2024
4 Open 4 document View SEC filing for 4 FORM 4 06 Dec 2024 04 Dec 2024
4 Open 4 document View SEC filing for 4 FORM 4 06 Dec 2024 04 Dec 2024
4 Open 4 document View SEC filing for 4 FORM 4 06 Dec 2024 04 Dec 2024
4 Open 4 document View SEC filing for 4 FORM 4 06 Dec 2024 04 Dec 2024
4 Open 4 document View SEC filing for 4 FORM 4 06 Dec 2024 04 Dec 2024
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 06 Nov 2024 29 Sep 2024 001-42157
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K Q3 2024 EARNINGS RELEASE ON FORM 8-K 06 Nov 2024 06 Nov 2024 001-42157
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 15 Oct 2024 08 Oct 2024 001-42157
8-K12B/A Open 8-K12B/A document | Open XBRL data View SEC filing for 8-K12B/A 8-K12B/A 16 Sep 2024 01 Jul 2024 001-42157
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 03 Sep 2024 03 Sep 2024 001-42157
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 08 Aug 2024 08 Aug 2024 001-42157
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 08 Aug 2024 30 Jun 2024 001-42157
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K Q2 2024 EARNINGS RELEASE ON FORM 8-K 08 Aug 2024 08 Aug 2024 001-42157
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 08 Jul 2024 01 Jul 2024 001-42157
3 Open 3 document View SEC filing for 3 3 03 Jul 2024 01 Jul 2024
SC 13D Open SC 13D document View SEC filing for SC 13D SC 13D 03 Jul 2024 005-94553
3 Open 3 document View SEC filing for 3 3 01 Jul 2024 01 Jul 2024
3 Open 3 document View SEC filing for 3 3 01 Jul 2024 01 Jul 2024
3 Open 3 document View SEC filing for 3 3 01 Jul 2024 01 Jul 2024
3 Open 3 document View SEC filing for 3 3 01 Jul 2024 01 Jul 2024
3 Open 3 document View SEC filing for 3 3 01 Jul 2024 01 Jul 2024
3 Open 3 document View SEC filing for 3 3 01 Jul 2024 01 Jul 2024
3 Open 3 document View SEC filing for 3 3 01 Jul 2024 01 Jul 2024
3 Open 3 document View SEC filing for 3 3 01 Jul 2024 01 Jul 2024
3 Open 3 document View SEC filing for 3 3 01 Jul 2024 01 Jul 2024
3 Open 3 document View SEC filing for 3 3 01 Jul 2024 01 Jul 2024
3 Open 3 document View SEC filing for 3 3 01 Jul 2024 01 Jul 2024
3 Open 3 document View SEC filing for 3 3 01 Jul 2024 01 Jul 2024
3 Open 3 document View SEC filing for 3 3 01 Jul 2024 01 Jul 2024
3 Open 3 document View SEC filing for 3 3 01 Jul 2024 01 Jul 2024
3 Open 3 document View SEC filing for 3 3 01 Jul 2024 01 Jul 2024
3 Open 3 document View SEC filing for 3 3 01 Jul 2024 01 Jul 2024
3 Open 3 document View SEC filing for 3 3 01 Jul 2024 01 Jul 2024
3 Open 3 document View SEC filing for 3 3 01 Jul 2024 01 Jul 2024
3 Open 3 document View SEC filing for 3 3 01 Jul 2024 01 Jul 2024
S-8 Open S-8 document View SEC filing for S-8 S-8 01 Jul 2024 333-280651
8-K12B Open 8-K12B document | Open XBRL data View SEC filing for 8-K12B 8-K12B 01 Jul 2024 01 Jul 2024 001-42157
425 Open 425 document View SEC filing for 425 425 26 Jun 2024
425 Open 425 document View SEC filing for 425 425 18 Jun 2024
425 Open 425 document View SEC filing for 425 425 16 Apr 2024
425 Open 425 document View SEC filing for 425 425 12 Mar 2024
425 Open 425 document View SEC filing for 425 425 04 Mar 2024
EFFECT Open EFFECT document View SEC filing for EFFECT 31 Jan 2024 333-276255
424B3 Open 424B3 document View SEC filing for 424B3 424B3 31 Jan 2024 333-276255
S-4/A Open S-4/A document View SEC filing for S-4/A S-4/A 29 Jan 2024 333-276255
CORRESP Open CORRESP document View SEC filing for CORRESP 29 Jan 2024
S-4/A Open S-4/A document View SEC filing for S-4/A S-4/A 26 Jan 2024 333-276255
CORRESP Open CORRESP document View SEC filing for CORRESP 17 Jan 2024
S-4/A Open S-4/A document View SEC filing for S-4/A S-4/A 17 Jan 2024 333-276255
UPLOAD Open UPLOAD document View SEC filing for UPLOAD 11 Jan 2024 333-276255
S-4 Open S-4 document View SEC filing for S-4 S-4 22 Dec 2023 333-276255
425 Open 425 document View SEC filing for 425 425 13 Nov 2023
425 Open 425 document View SEC filing for 425 425 03 Nov 2023
425 Open 425 document View SEC filing for 425 425 03 Nov 2023
425 Open 425 document View SEC filing for 425 425 03 Nov 2023
425 Open 425 document View SEC filing for 425 425 02 Nov 2023
425 Open 425 document View SEC filing for 425 425 02 Nov 2023
425 Open 425 document View SEC filing for 425 425 02 Nov 2023
425 Open 425 document View SEC filing for 425 425 02 Nov 2023

About this filer

Six Flags Entertainment Corporation/NEW files with the SEC under CIK 0001999001. This page aggregates EDGAR filings and related ownership activity.

Industry: Services Amusement & Recreation Services.

See insider transactions for this issuer.

FAQ

What is a CIK?
A Central Index Key (CIK) is a unique identifier assigned by the SEC to each filer.
Why are some filings missing?
New filings appear as the SEC updates EDGAR, and older records can vary by availability.
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Updates follow new EDGAR submissions and periodic data refreshes.

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