Ecovyst Inc. SEC filings ECVT
Ecovyst Inc. has 576 filings in SEC EDGAR's recent list, going back to Jun 9, 2017. Its latest annual report, Form ARS, was filed on Apr 15, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Nov 5, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Nov 5, 2026 (results of operations). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 10-Q | Quarterly report | Nov 5, 2026 | Sep 30, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Nov 5, 2026 | — |
| 8-K |
Current report
Results of operations
|
Nov 5, 2026 | Nov 5, 2026 |
| 8-K |
Current report
Officer or director change
|
Oct 28, 2026 | Oct 22, 2026 |
| 4 | Insider transaction | Sep 14, 2026 | Sep 10, 2026 |
| 4 | Insider transaction | Aug 26, 2026 | Aug 24, 2026 |
| 3 | Initial insider ownership | Aug 26, 2026 | Aug 24, 2026 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Aug 24, 2026 | Aug 21, 2026 |
| 10-Q | Quarterly report | Aug 6, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Results of operations
|
Aug 5, 2026 | Aug 5, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Jul 31, 2026 | — |
| 144 | Notice of proposed sale | Jul 17, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 14, 2026 | — |
| 8-K |
Current report
Material agreement, New debt, Other events
|
Jun 30, 2026 | Jun 30, 2026 |
| 11-K | Employee savings plan report | Jun 22, 2026 | Dec 31, 2025 |
| 4 | Insider transaction | Jun 3, 2026 | Jun 2, 2026 |
| 144 | Notice of proposed sale | Jun 2, 2026 | — |
| 4 | Insider transaction | May 27, 2026 | May 26, 2026 |
| 3 | Initial insider ownership | May 26, 2026 | May 20, 2026 |
| 8-K |
Current report
Shareholder vote results
|
May 21, 2026 | May 20, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 8, 2026 | — |
| 10-Q | Quarterly report | May 5, 2026 | Mar 31, 2026 |
| 8-K |
Current report
Results of operations
|
May 5, 2026 | May 5, 2026 |
| 8-K |
Current report
Material agreement
|
May 4, 2026 | May 1, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 29, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Apr 24, 2026 | — |
| ARS | Annual report to shareholders | Apr 15, 2026 | Dec 31, 2025 |
| DEF 14A | Proxy statement | Apr 15, 2026 | May 20, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 26, 2026 | — |
| 4 | Insider transaction | Mar 16, 2026 | Mar 12, 2026 |
| 4 | Insider transaction | Mar 6, 2026 | Mar 4, 2026 |
| 4 | Insider transaction | Mar 6, 2026 | Mar 4, 2026 |
| 10-K | Annual report | Feb 27, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Results of operations
|
Feb 26, 2026 | Feb 26, 2026 |
| 4 | Insider transaction | Feb 5, 2026 | Feb 3, 2026 |
| 4 | Insider transaction | Feb 5, 2026 | Feb 3, 2026 |
| 4 | Insider transaction | Feb 5, 2026 | Feb 3, 2026 |
| 4 | Insider transaction | Feb 5, 2026 | Feb 3, 2026 |
| 4 | Insider transaction | Feb 5, 2026 | Feb 3, 2026 |
| 4 | Insider transaction | Feb 5, 2026 | Feb 3, 2026 |
| 4 | Insider transaction | Feb 5, 2026 | Feb 3, 2026 |
| 4 | Insider transaction | Feb 5, 2026 | Feb 3, 2026 |
| 4 | Insider transaction | Feb 5, 2026 | Feb 3, 2026 |
| 4 | Insider transaction | Feb 5, 2026 | Feb 3, 2026 |
| 4 | Insider transaction | Jan 26, 2026 | Jan 22, 2026 |
| 4 | Insider transaction | Jan 26, 2026 | Jan 22, 2026 |
| 4 | Insider transaction | Jan 7, 2026 | Jan 5, 2026 |
| 4 | Insider transaction | Jan 7, 2026 | Jan 5, 2026 |
| 8-K |
Current report
Acquisition or sale of assets, Officer or director change
|
Jan 7, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Officer or director change
|
Dec 12, 2025 | Dec 8, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Nov 14, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 14, 2025 | — |
| 4 | Insider transaction | Nov 10, 2025 | Nov 7, 2025 |
| 144 | Notice of proposed sale | Nov 7, 2025 | — |
| 10-Q | Quarterly report | Nov 5, 2025 | Sep 30, 2025 |
| 8-K |
Current report
Results of operations
|
Nov 4, 2025 | Nov 4, 2025 |
| 8-K |
Current report
Material agreement
|
Sep 11, 2025 | Sep 10, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 13, 2025 | — |
| 8-K |
Current report
Officer or director change
|
Aug 11, 2025 | Aug 11, 2025 |
| 10-Q | Quarterly report | Aug 7, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Results of operations
|
Aug 7, 2025 | Aug 7, 2025 |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Jul 2, 2025 | — |
| 11-K | Employee savings plan report | Jun 20, 2025 | Dec 31, 2024 |
| SD | Specialized disclosure (conflict minerals) | May 30, 2025 | — |
| 8-K |
Current report
Shareholder vote results
|
May 9, 2025 | May 8, 2025 |
| 10-Q | Quarterly report | May 2, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Results of operations
|
May 1, 2025 | May 1, 2025 |
| 8-K |
Current report
Material agreement, New debt
|
Apr 11, 2025 | Apr 10, 2025 |
| ARS | Annual report to shareholders | Apr 8, 2025 | Dec 31, 2024 |
| DEF 14A | Proxy statement | Apr 8, 2025 | May 8, 2025 |
| 10-K | Annual report | Feb 28, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Results of operations
|
Feb 27, 2025 | Feb 27, 2025 |
| 4 | Insider transaction | Feb 5, 2025 | Feb 3, 2025 |
| 4 | Insider transaction | Feb 5, 2025 | Feb 3, 2025 |
| 4 | Insider transaction | Feb 5, 2025 | Feb 3, 2025 |
| 4 | Insider transaction | Feb 5, 2025 | Feb 3, 2025 |
| 4 | Insider transaction | Feb 5, 2025 | Feb 3, 2025 |
| 4 | Insider transaction | Feb 5, 2025 | Feb 3, 2025 |
| 4 | Insider transaction | Feb 5, 2025 | Feb 3, 2025 |
| 4 | Insider transaction | Feb 5, 2025 | Feb 3, 2025 |
| 4 | Insider transaction | Feb 5, 2025 | Feb 3, 2025 |
| 4 | Insider transaction | Feb 5, 2025 | Feb 3, 2025 |
| 4 | Insider transaction | Feb 5, 2025 | Feb 3, 2025 |
| 4 | Insider transaction | Feb 5, 2025 | Feb 3, 2025 |
| 8-K |
Current report
Material agreement, New debt
|
Jan 31, 2025 | Jan 30, 2025 |
| 4 | Insider transaction | Jan 23, 2025 | Jan 22, 2025 |
| 4 | Insider transaction | Jan 23, 2025 | Jan 22, 2025 |
| 4 | Insider transaction | Jan 23, 2025 | Jan 22, 2025 |
| 4 | Insider transaction | Jan 23, 2025 | Jan 22, 2025 |
| 4 | Insider transaction | Jan 23, 2025 | Jan 22, 2025 |
| 4 | Insider transaction | Jan 7, 2025 | Jan 5, 2025 |
| 4 | Insider transaction | Jan 7, 2025 | Jan 5, 2025 |
| 4 | Insider transaction | Jan 7, 2025 | Jan 5, 2025 |
| 4 | Insider transaction | Jan 7, 2025 | Jan 5, 2025 |
| 4 | Insider transaction | Jan 7, 2025 | Jan 5, 2025 |
| 8-K |
Current report
Officer or director change
|
Dec 16, 2024 | Dec 10, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 8, 2024 | — |
| 10-Q | Quarterly report | Nov 1, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Results of operations
|
Oct 31, 2024 | Oct 31, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Oct 21, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Sep 10, 2024 | — |
| 4 | Insider transaction | Aug 8, 2024 | Aug 7, 2024 |
| 4 | Insider transaction | Aug 6, 2024 | Aug 5, 2024 |
| 4 | Insider transaction | Aug 6, 2024 | Aug 5, 2024 |
| 4 | Insider transaction | Aug 6, 2024 | Aug 5, 2024 |
| 10-Q | Quarterly report | Aug 2, 2024 | Jun 30, 2024 |
| 8-K |
Current report
Results of operations
|
Aug 1, 2024 | Aug 1, 2024 |
| 11-K | Employee savings plan report | Jun 21, 2024 | Dec 31, 2023 |
| 8-K |
Current report
Material agreement, New debt
|
Jun 12, 2024 | Jun 12, 2024 |
| SD | Specialized disclosure (conflict minerals) | May 31, 2024 | — |
| 4 | Insider transaction | May 22, 2024 | May 20, 2024 |
| 3 | Initial insider ownership | May 17, 2024 | May 8, 2024 |
| 8-K |
Current report
Bylaw or fiscal year change, Shareholder vote results, Other events
|
May 9, 2024 | May 8, 2024 |
| 8-K/A |
Amended current report
Officer or director change
|
May 9, 2024 | Feb 22, 2024 |
| DEFA14A | Additional proxy material | May 6, 2024 | — |
| 8-K |
Current report
Officer or director change
|
May 6, 2024 | May 3, 2024 |
| 10-Q | Quarterly report | May 3, 2024 | Mar 31, 2024 |
| 8-K |
Current report
Results of operations
|
May 2, 2024 | May 2, 2024 |
| ARS | Annual report to shareholders | Apr 8, 2024 | Dec 31, 2023 |
| DEF 14A | Proxy statement | Apr 8, 2024 | May 8, 2024 |
| 4 | Insider transaction | Mar 26, 2024 | Mar 22, 2024 |
| 144 | Notice of proposed sale | Mar 22, 2024 | — |
| PRE 14A | Preliminary proxy statement | Mar 15, 2024 | May 8, 2024 |
| 4 | Insider transaction | Mar 12, 2024 | Mar 8, 2024 |
| 3 | Initial insider ownership | Mar 8, 2024 | Mar 1, 2024 |
| 10-K | Annual report | Feb 29, 2024 | Dec 31, 2023 |
| 8-K |
Current report
Officer or director change, Other events
|
Feb 28, 2024 | Feb 22, 2024 |
| 8-K |
Current report
Results of operations
|
Feb 28, 2024 | Feb 28, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 13, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Feb 13, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 12, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Feb 9, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Jan 26, 2024 | — |
| 4 | Insider transaction | Jan 24, 2024 | Jan 22, 2024 |
| 4 | Insider transaction | Jan 24, 2024 | Jan 22, 2024 |
| 4 | Insider transaction | Jan 24, 2024 | Jan 22, 2024 |
| 4 | Insider transaction | Jan 24, 2024 | Jan 22, 2024 |
| 4 | Insider transaction | Jan 24, 2024 | Jan 22, 2024 |
| 4 | Insider transaction | Jan 24, 2024 | Jan 22, 2024 |
| 4 | Insider transaction | Jan 24, 2024 | Jan 22, 2024 |
| 4 | Insider transaction | Jan 24, 2024 | Jan 22, 2024 |
| 4 | Insider transaction | Jan 24, 2024 | Jan 22, 2024 |
| 4 | Insider transaction | Jan 24, 2024 | Jan 22, 2024 |
| 4 | Insider transaction | Jan 24, 2024 | Jan 22, 2024 |
| 4 | Insider transaction | Jan 24, 2024 | Jan 22, 2024 |
| UPLOAD | Letter from the SEC | Jan 10, 2024 | — |
| 4 | Insider transaction | Jan 9, 2024 | Jan 5, 2024 |
| 4 | Insider transaction | Jan 9, 2024 | Jan 5, 2024 |
| 4 | Insider transaction | Jan 9, 2024 | Jan 5, 2024 |
| 4 | Insider transaction | Jan 9, 2024 | Jan 5, 2024 |
| CORRESP | Letter to the SEC | Jan 4, 2024 | — |
| UPLOAD | Letter from the SEC | Dec 19, 2023 | — |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Dec 18, 2023 | Dec 12, 2023 |
| CORRESP | Letter to the SEC | Nov 30, 2023 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Nov 28, 2023 | Nov 28, 2023 |
| UPLOAD | Letter from the SEC | Nov 17, 2023 | — |
| 10-Q | Quarterly report | Nov 3, 2023 | Sep 30, 2023 |
| 8-K |
Current report
Results of operations
|
Nov 2, 2023 | Nov 2, 2023 |
| 4 | Insider transaction | Aug 25, 2023 | Aug 23, 2023 |
| 4 | Insider transaction | Aug 25, 2023 | Aug 23, 2023 |
| 10-Q | Quarterly report | Aug 8, 2023 | Jun 30, 2023 |
| 8-K |
Current report
Results of operations
|
Aug 3, 2023 | Aug 3, 2023 |
| 4 | Insider transaction | Jul 5, 2023 | Jul 1, 2023 |
| 4 | Insider transaction | Jul 5, 2023 | Jul 1, 2023 |
| 4 | Insider transaction | Jul 5, 2023 | Jul 1, 2023 |
| 4 | Insider transaction | Jul 5, 2023 | Jul 1, 2023 |
| 11-K | Employee savings plan report | Jun 27, 2023 | Dec 31, 2022 |
| SC 13D/A | Amended ownership over 5% (active) | Jun 27, 2023 | — |
| SD | Specialized disclosure (conflict minerals) | May 31, 2023 | — |
| 4 | Insider transaction | May 26, 2023 | May 26, 2023 |
| SC 13D/A | Amended ownership over 5% (active) | May 26, 2023 | — |
| 8-K |
Current report
Material agreement, Other events
|
May 26, 2023 | May 23, 2023 |
| 424B7 | Filing | May 25, 2023 | — |
| FWP | Free writing prospectus | May 24, 2023 | — |
| 424B7 | Filing | May 24, 2023 | — |
| 8-K |
Current report
Shareholder vote results
|
May 11, 2023 | May 10, 2023 |
| 10-Q | Quarterly report | May 5, 2023 | Mar 31, 2023 |
| 8-K |
Current report
Results of operations
|
May 4, 2023 | May 4, 2023 |
| ARS | Annual report to shareholders | Apr 13, 2023 | Dec 31, 2022 |
| DEF 14A | Proxy statement | Apr 13, 2023 | — |
| 8-K |
Current report
Officer or director change
|
Apr 11, 2023 | Apr 5, 2023 |
| 4 | Insider transaction | Mar 9, 2023 | Mar 7, 2023 |
| 4 | Insider transaction | Mar 9, 2023 | Mar 8, 2023 |
| 4 | Insider transaction | Mar 9, 2023 | Mar 8, 2023 |
| 4 | Insider transaction | Mar 9, 2023 | Mar 7, 2023 |
| 4 | Insider transaction | Mar 7, 2023 | Mar 3, 2023 |
| 4 | Insider transaction | Mar 7, 2023 | Mar 7, 2023 |
| 4 | Insider transaction | Mar 7, 2023 | Mar 7, 2023 |
| 8-K |
Current report
Material agreement, Other events
|
Mar 6, 2023 | Mar 2, 2023 |
| 424B7 | Filing | Mar 6, 2023 | — |
| FWP | Free writing prospectus | Mar 2, 2023 | — |
| 424B7 | Filing | Mar 2, 2023 | — |
| 10-K | Annual report | Feb 28, 2023 | Dec 31, 2022 |
| 8-K |
Current report
Results of operations
|
Feb 28, 2023 | Feb 28, 2023 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 13, 2023 | — |
| SC 13G | Ownership over 5% (passive) | Feb 13, 2023 | — |
| SC 13G | Ownership over 5% (passive) | Feb 9, 2023 | — |
| 4 | Insider transaction | Jan 24, 2023 | Jan 20, 2023 |
| 4 | Insider transaction | Jan 18, 2023 | Jan 16, 2023 |
| 4 | Insider transaction | Jan 18, 2023 | Jan 16, 2023 |
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
- Chemicals & Allied Products (SIC 2800)
- Listed as
- ECVT (NYSE)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Wayne, PA
- SEC filer status
- Large accelerated filer
- SEC CIK
- 1708035
- Former names
- PQ Group Holdings Inc. (until Jul 23, 2021)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.