Ecovyst Inc. SEC EDGAR Filings (CIK 0001708035)

SEC EDGAR filings, ownership reports, and insider transactions for Ecovyst Inc..

Symbol
ECVT on NYSE
Industry
Chemicals & Allied Products (Industrial Applications And Services)
Business address
600 Lee Road, Suite 200, Wayne, PA, 19087
State of incorporation
DE
Fiscal year end
31 December
Former names
PQ Group Holdings Inc. (to 23 Jul 2021)
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Ecovyst Inc. has filed 530 SEC EDGAR filings since 09 Jun 2017

Latest Filings

Recent SEC filings for Ecovyst Inc. including 4, 8-K, SCHEDULE 13G and more.

Form type Document Filing Description Filing date Reporting date File number(s)
4 Open 4 document View SEC filing for 4 FORM 4 07 Jan 2026 05 Jan 2026
4 Open 4 document View SEC filing for 4 FORM 4 07 Jan 2026 05 Jan 2026
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 07 Jan 2026 31 Dec 2025 001-38221
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 12 Dec 2025 08 Dec 2025 001-38221
SCHEDULE 13G Open SCHEDULE 13G document View SEC filing for SCHEDULE 13G 14 Nov 2025 005-90364
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 14 Nov 2025 005-90364
4 Open 4 document View SEC filing for 4 FORM 4 10 Nov 2025 07 Nov 2025
144 Open 144 document View SEC filing for 144 07 Nov 2025 001-38221
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 05 Nov 2025 30 Sep 2025 001-38221
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 04 Nov 2025 04 Nov 2025 001-38221
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 11 Sep 2025 10 Sep 2025 001-38221
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 13 Aug 2025 005-90364
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 11 Aug 2025 11 Aug 2025 001-38221
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 07 Aug 2025 30 Jun 2025 001-38221
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 07 Aug 2025 07 Aug 2025 001-38221
SCHEDULE 13D/A Open SCHEDULE 13D/A document View SEC filing for SCHEDULE 13D/A 02 Jul 2025 005-90364
11-K Open 11-K document View SEC filing for 11-K 11-K 20 Jun 2025 31 Dec 2024 001-38221
SD Open SD document View SEC filing for SD SD 30 May 2025 001-38221
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 09 May 2025 08 May 2025 001-38221
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 02 May 2025 31 Mar 2025 001-38221
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 01 May 2025 01 May 2025 001-38221
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 11 Apr 2025 10 Apr 2025 001-38221
ARS Open ARS document View SEC filing for ARS ARS 08 Apr 2025 31 Dec 2024 001-38221
DEF 14A Open DEF 14A document | Open XBRL data View SEC filing for DEF 14A DEF 14A 08 Apr 2025 08 May 2025 001-38221
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 28 Feb 2025 31 Dec 2024 001-38221
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 27 Feb 2025 27 Feb 2025 001-38221
4 Open 4 document View SEC filing for 4 FORM 4 05 Feb 2025 03 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 05 Feb 2025 03 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 05 Feb 2025 03 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 05 Feb 2025 03 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 05 Feb 2025 03 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 05 Feb 2025 03 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 05 Feb 2025 03 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 05 Feb 2025 03 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 05 Feb 2025 03 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 05 Feb 2025 03 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 05 Feb 2025 03 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 05 Feb 2025 03 Feb 2025
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 31 Jan 2025 30 Jan 2025 001-38221
4 Open 4 document View SEC filing for 4 FORM 4 23 Jan 2025 22 Jan 2025
4 Open 4 document View SEC filing for 4 FORM 4 23 Jan 2025 22 Jan 2025
4 Open 4 document View SEC filing for 4 FORM 4 23 Jan 2025 22 Jan 2025
4 Open 4 document View SEC filing for 4 FORM 4 23 Jan 2025 22 Jan 2025
4 Open 4 document View SEC filing for 4 FORM 4 23 Jan 2025 22 Jan 2025
4 Open 4 document View SEC filing for 4 FORM 4 07 Jan 2025 05 Jan 2025
4 Open 4 document View SEC filing for 4 FORM 4 07 Jan 2025 05 Jan 2025
4 Open 4 document View SEC filing for 4 FORM 4 07 Jan 2025 05 Jan 2025
4 Open 4 document View SEC filing for 4 FORM 4 07 Jan 2025 05 Jan 2025
4 Open 4 document View SEC filing for 4 FORM 4 07 Jan 2025 05 Jan 2025
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 16 Dec 2024 10 Dec 2024 001-38221
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 08 Nov 2024 005-90364
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 01 Nov 2024 30 Sep 2024 001-38221
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 31 Oct 2024 31 Oct 2024 001-38221
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 21 Oct 2024 005-90364
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 10 Sep 2024 005-90364
4 Open 4 document View SEC filing for 4 FORM 4 08 Aug 2024 07 Aug 2024
4 Open 4 document View SEC filing for 4 FORM 4 06 Aug 2024 05 Aug 2024
4 Open 4 document View SEC filing for 4 FORM 4 06 Aug 2024 05 Aug 2024
4 Open 4 document View SEC filing for 4 FORM 4 06 Aug 2024 05 Aug 2024
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 02 Aug 2024 30 Jun 2024 001-38221
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 01 Aug 2024 01 Aug 2024 001-38221
11-K Open 11-K document View SEC filing for 11-K 11-K 21 Jun 2024 31 Dec 2023 001-38221
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 12 Jun 2024 12 Jun 2024 001-38221
SD Open SD document View SEC filing for SD SD 31 May 2024 001-38221
4 Open 4 document View SEC filing for 4 FORM 4 22 May 2024 20 May 2024
3 Open 3 document View SEC filing for 3 FORM 3 17 May 2024 08 May 2024
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 09 May 2024 08 May 2024 001-38221
8-K/A Open 8-K/A document | Open XBRL data View SEC filing for 8-K/A 8-K/A 09 May 2024 22 Feb 2024 001-38221
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 06 May 2024 001-38221
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 06 May 2024 03 May 2024 001-38221
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 03 May 2024 31 Mar 2024 001-38221
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 02 May 2024 02 May 2024 001-38221
ARS Open ARS document View SEC filing for ARS ARS 08 Apr 2024 31 Dec 2023 001-38221
DEF 14A Open DEF 14A document | Open XBRL data View SEC filing for DEF 14A DEF 14A 08 Apr 2024 08 May 2024 001-38221
4 Open 4 document View SEC filing for 4 FORM 4 26 Mar 2024 22 Mar 2024
144 Open 144 document View SEC filing for 144 22 Mar 2024 001-38221
PRE 14A Open PRE 14A document | Open XBRL data View SEC filing for PRE 14A PRE 14A 15 Mar 2024 08 May 2024 001-38221
4 Open 4 document View SEC filing for 4 FORM 4 12 Mar 2024 08 Mar 2024
3 Open 3 document View SEC filing for 3 FORM 3 08 Mar 2024 01 Mar 2024
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 29 Feb 2024 31 Dec 2023 001-38221
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 28 Feb 2024 22 Feb 2024 001-38221
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 28 Feb 2024 28 Feb 2024 001-38221
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SCHEDULE 13G/A 13 Feb 2024 005-90364
SC 13G Open SC 13G document View SEC filing for SC 13G 13 Feb 2024 005-90364
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 12 Feb 2024 005-90364
SC 13G Open SC 13G document View SEC filing for SC 13G SEC SCHEDULE 13G 09 Feb 2024 005-90364
SC 13G Open SC 13G document View SEC filing for SC 13G 26 Jan 2024 005-90364
4 Open 4 document View SEC filing for 4 FORM 4 24 Jan 2024 22 Jan 2024
4 Open 4 document View SEC filing for 4 FORM 4 24 Jan 2024 22 Jan 2024
4 Open 4 document View SEC filing for 4 FORM 4 24 Jan 2024 22 Jan 2024
4 Open 4 document View SEC filing for 4 FORM 4 24 Jan 2024 22 Jan 2024
4 Open 4 document View SEC filing for 4 FORM 4 24 Jan 2024 22 Jan 2024
4 Open 4 document View SEC filing for 4 FORM 4 24 Jan 2024 22 Jan 2024
4 Open 4 document View SEC filing for 4 FORM 4 24 Jan 2024 22 Jan 2024
4 Open 4 document View SEC filing for 4 FORM 4 24 Jan 2024 22 Jan 2024
4 Open 4 document View SEC filing for 4 FORM 4 24 Jan 2024 22 Jan 2024
4 Open 4 document View SEC filing for 4 FORM 4 24 Jan 2024 22 Jan 2024
4 Open 4 document View SEC filing for 4 FORM 4 24 Jan 2024 22 Jan 2024
4 Open 4 document View SEC filing for 4 FORM 4 24 Jan 2024 22 Jan 2024
UPLOAD Open UPLOAD document View SEC filing for UPLOAD 10 Jan 2024 001-38221
4 Open 4 document View SEC filing for 4 FORM 4 09 Jan 2024 05 Jan 2024
4 Open 4 document View SEC filing for 4 FORM 4 09 Jan 2024 05 Jan 2024
4 Open 4 document View SEC filing for 4 FORM 4 09 Jan 2024 05 Jan 2024
4 Open 4 document View SEC filing for 4 FORM 4 09 Jan 2024 05 Jan 2024
CORRESP Open CORRESP document View SEC filing for CORRESP 04 Jan 2024
UPLOAD Open UPLOAD document View SEC filing for UPLOAD 19 Dec 2023 001-38221
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 18 Dec 2023 12 Dec 2023 001-38221
CORRESP Open CORRESP document View SEC filing for CORRESP 30 Nov 2023
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 28 Nov 2023 28 Nov 2023 001-38221
UPLOAD Open UPLOAD document View SEC filing for UPLOAD 17 Nov 2023 001-38221
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 03 Nov 2023 30 Sep 2023 001-38221
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 02 Nov 2023 02 Nov 2023 001-38221
4 Open 4 document View SEC filing for 4 4 25 Aug 2023 23 Aug 2023
4 Open 4 document View SEC filing for 4 4 25 Aug 2023 23 Aug 2023
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 08 Aug 2023 30 Jun 2023 001-38221
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 03 Aug 2023 03 Aug 2023 001-38221
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 05 Jul 2023 01 Jul 2023
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 05 Jul 2023 01 Jul 2023
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 05 Jul 2023 01 Jul 2023
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 05 Jul 2023 01 Jul 2023
11-K Open 11-K document View SEC filing for 11-K 11-K 27 Jun 2023 31 Dec 2022 001-38221
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A AMENDMENT NO. 6 27 Jun 2023 005-90364
SD Open SD document View SEC filing for SD SD 31 May 2023 001-38221
4 Open 4 document View SEC filing for 4 26 May 2023 26 May 2023
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A AMENDMENT NO. 5 26 May 2023 005-90364
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 26 May 2023 23 May 2023 001-38221
424B7 Open 424B7 document View SEC filing for 424B7 424B7 25 May 2023 333-255514
FWP Open FWP document View SEC filing for FWP FWP 24 May 2023 333-255514
424B7 Open 424B7 document View SEC filing for 424B7 424B7 24 May 2023 333-255514
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 11 May 2023 10 May 2023 001-38221
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 05 May 2023 31 Mar 2023 001-38221
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 04 May 2023 04 May 2023 001-38221
ARS Open ARS document View SEC filing for ARS ARS 13 Apr 2023 31 Dec 2022 001-38221
DEF 14A Open DEF 14A document | Open XBRL data View SEC filing for DEF 14A DEF 14A 13 Apr 2023 001-38221
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 11 Apr 2023 05 Apr 2023 001-38221
4 Open 4 document View SEC filing for 4 4 09 Mar 2023 07 Mar 2023
4 Open 4 document View SEC filing for 4 4 09 Mar 2023 08 Mar 2023
4 Open 4 document View SEC filing for 4 4 09 Mar 2023 08 Mar 2023
4 Open 4 document View SEC filing for 4 4 09 Mar 2023 07 Mar 2023
4 Open 4 document View SEC filing for 4 4 07 Mar 2023 03 Mar 2023
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 07 Mar 2023 07 Mar 2023
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 07 Mar 2023 07 Mar 2023
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 06 Mar 2023 02 Mar 2023 001-38221
424B7 Open 424B7 document View SEC filing for 424B7 424B7 06 Mar 2023 333-255514
FWP Open FWP document View SEC filing for FWP FWP 02 Mar 2023 333-255514
424B7 Open 424B7 document View SEC filing for 424B7 424B7 02 Mar 2023 333-255514
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 28 Feb 2023 31 Dec 2022 001-38221
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 28 Feb 2023 28 Feb 2023 001-38221
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 13 Feb 2023 005-90364
SC 13G Open SC 13G document View SEC filing for SC 13G 13 Feb 2023 005-90364
SC 13G Open SC 13G document View SEC filing for SC 13G SCHEDULE 13G 09 Feb 2023 005-90364
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 24 Jan 2023 20 Jan 2023
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 18 Jan 2023 16 Jan 2023
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 18 Jan 2023 16 Jan 2023
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 18 Jan 2023 16 Jan 2023
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 18 Jan 2023 16 Jan 2023
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 18 Jan 2023 16 Jan 2023
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 18 Jan 2023 16 Jan 2023
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 18 Jan 2023 16 Jan 2023
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 18 Jan 2023 16 Jan 2023
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 18 Jan 2023 16 Jan 2023
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 18 Jan 2023 16 Jan 2023
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 18 Jan 2023 16 Jan 2023
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 18 Jan 2023 16 Jan 2023
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 09 Jan 2023 05 Jan 2023
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 09 Jan 2023 05 Jan 2023
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 04 Jan 2023 01 Jan 2023
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 22 Dec 2022 16 Dec 2022 001-38221
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 09 Dec 2022 07 Dec 2022
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 25 Nov 2022 21 Nov 2022 001-38221
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 18 Nov 2022 16 Nov 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 18 Nov 2022 17 Nov 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 18 Nov 2022 16 Nov 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 18 Nov 2022 17 Nov 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 18 Nov 2022 16 Nov 2022
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 15 Nov 2022 14 Nov 2022 001-38221
424B7 Open 424B7 document View SEC filing for 424B7 424B7 15 Nov 2022 333-255514
FWP Open FWP document View SEC filing for FWP FWP 15 Nov 2022 333-255514
424B7 Open 424B7 document View SEC filing for 424B7 424B7 14 Nov 2022 333-255514
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 07 Nov 2022 03 Nov 2022 001-38221
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 04 Nov 2022 30 Sep 2022 001-38221
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 02 Nov 2022 27 Oct 2022 001-38221
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 01 Nov 2022 01 Nov 2022 001-38221
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 16 Sep 2022 15 Sep 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 12 Aug 2022 11 Aug 2022
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 12 Aug 2022 08 Aug 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 10 Aug 2022 08 Aug 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 10 Aug 2022 08 Aug 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 09 Aug 2022 05 Aug 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 08 Aug 2022 04 Aug 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 08 Aug 2022 04 Aug 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 08 Aug 2022 05 Aug 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 08 Aug 2022 04 Aug 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 08 Aug 2022 04 Aug 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 08 Aug 2022 04 Aug 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 08 Aug 2022 04 Aug 2022
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 05 Aug 2022 03 Aug 2022 001-38221
424B7 Open 424B7 document View SEC filing for 424B7 424B7 04 Aug 2022 333-255514
FWP Open FWP document View SEC filing for FWP FWP 03 Aug 2022 333-255514
424B7 Open 424B7 document View SEC filing for 424B7 424B7 03 Aug 2022 333-255514
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 02 Aug 2022 29 Jul 2022
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 02 Aug 2022 27 Jul 2022
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 01 Aug 2022 30 Jun 2022 001-38221
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 01 Aug 2022 27 Jul 2022 001-38221
8-K/A Open 8-K/A document | Open XBRL data View SEC filing for 8-K/A 8-K/A 01 Aug 2022 25 Apr 2022 001-38221
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 29 Jul 2022 29 Jul 2022 001-38221
11-K Open 11-K document View SEC filing for 11-K 11-K 27 Jun 2022 31 Dec 2021 001-38221
SD Open SD document View SEC filing for SD SD 31 May 2022 001-38221
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 31 May 2022 26 May 2022 001-38221
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 23 May 2022 19 May 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 23 May 2022 20 May 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 16 May 2022 12 May 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 16 May 2022 12 May 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 12 May 2022 10 May 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 09 May 2022 05 May 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 05 May 2022 03 May 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 05 May 2022 03 May 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 05 May 2022 03 May 2022
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 04 May 2022 27 Apr 2022
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 04 May 2022 27 Apr 2022
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 04 May 2022 27 Apr 2022
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 03 May 2022 31 Mar 2022 001-38221
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 29 Apr 2022 25 Apr 2022 001-38221
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF 14A 29 Apr 2022 26 May 2022 001-38221
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 28 Apr 2022 28 Apr 2022 001-38221
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 03 Mar 2022 01 Mar 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 03 Mar 2022 01 Mar 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 03 Mar 2022 01 Mar 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 03 Mar 2022 01 Mar 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 03 Mar 2022 01 Mar 2022
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 01 Mar 2022 31 Dec 2021 001-38221
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 25 Feb 2022 25 Feb 2022 001-38221
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 09 Feb 2022 005-90364
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 24 Jan 2022 20 Jan 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 19 Jan 2022 17 Jan 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 19 Jan 2022 17 Jan 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 19 Jan 2022 17 Jan 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 19 Jan 2022 17 Jan 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 19 Jan 2022 17 Jan 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 19 Jan 2022 17 Jan 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 19 Jan 2022 17 Jan 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 19 Jan 2022 17 Jan 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 19 Jan 2022 17 Jan 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 19 Jan 2022 17 Jan 2022
S-8 Open S-8 document View SEC filing for S-8 S-8 14 Jan 2022 333-262180
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 07 Jan 2022 05 Jan 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 07 Jan 2022 05 Jan 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 07 Jan 2022 05 Jan 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 20 Dec 2021 20 Dec 2021
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 20 Dec 2021 20 Dec 2021
4 Open 4 document View SEC filing for 4 20 Dec 2021 20 Dec 2021
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A AMENDMENT NO. 4 20 Dec 2021 005-90364
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 23 Nov 2021 19 Nov 2021
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 23 Nov 2021 23 Nov 2021
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 23 Nov 2021 23 Nov 2021
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 23 Nov 2021 18 Nov 2021 001-38221
4 Open 4 document View SEC filing for 4 23 Nov 2021 23 Nov 2021
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A AMENDMENT NO. 3 23 Nov 2021 005-90364
424B7 Open 424B7 document View SEC filing for 424B7 424B7 19 Nov 2021 333-255514
424B7 Open 424B7 document View SEC filing for 424B7 424B7 16 Nov 2021 333-255514
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 16 Nov 2021 31 Dec 2020 001-38221
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 09 Nov 2021 30 Sep 2021 001-38221
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 09 Nov 2021 09 Nov 2021 001-38221
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 14 Sep 2021 14 Sep 2021 001-38221
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 13 Aug 2021 05 Aug 2021
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 09 Aug 2021 30 Jun 2021 001-38221
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 05 Aug 2021 05 Aug 2021 001-38221
8-K/A Open 8-K/A document | Open XBRL data View SEC filing for 8-K/A 8-K/A 04 Aug 2021 22 Mar 2021 001-38221
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 03 Aug 2021 01 Aug 2021 001-38221
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 23 Jul 2021 22 Jul 2021 001-38221
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 15 Jul 2021 12 Jul 2021 001-38221
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424B7 Open 424B7 document View SEC filing for 424B7 424B7 29 Apr 2021 333-255514
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424B7 Open 424B7 document View SEC filing for 424B7 424B7 26 Apr 2021 333-255514
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DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF 14A 01 Apr 2021 29 Apr 2021 001-38221
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10-K Open 10-K document | Open XBRL data View SEC filing for 10-K PQ GROUP HOLDINGS INC. FORM 10-K 01 Mar 2019 31 Dec 2018 001-38221
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4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 31 Dec 2018 27 Dec 2018
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10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q PQ GROUP HOLDINGS INC. FORM 10-Q 11 May 2018 31 Mar 2018 001-38221
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About this filer

Ecovyst Inc. files with the SEC under CIK 0001708035. This page aggregates EDGAR filings and related ownership activity.

Industry: Chemicals & Allied Products.

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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