# Ecovyst Inc.: filings

ECVT · NYSE · CIK 1708035 · [Materials](/sectors/materials.md) · fiscal year ends Dec 31

Pages: [Overview](/companies/ecvt.md) · [Financials](/companies/ecvt/financials.md) · [Filings](/companies/ecvt/filings.md) · [Insiders](/companies/ecvt/insiders.md)

## Reports and events: 173 filings

Newest first, by EDGAR acceptance time (Eastern). Filter with ?form= one of: `periodic`, `8-K`, `10-K`, `10-Q`, `4`, `proxy`, `13dg`, `all`, or any form this company filed (4 266, 8-K 108, 3 41, 10-Q 27, 424B7 12, 10-K 9, DEF 14A 9, UPLOAD 9, 11-K 8, SC 13G 7, S-1/A 6, SC 13D/A 6, SC 13G/A 6, SD 6, 8-K/A 5, CORRESP 5, FWP 5, SCHEDULE 13G/A 5, 144 4, ARS 4, S-8 3, SCHEDULE 13G 3, 3/A 2, DEFA14A 2, 424B4 1, 8-A12B 1, CERTNYS 1, EFFECT 1, NT 10-K 1, NT 10-Q 1, PRE 14A 1, S-1 1, S-3ASR 1, SC 13D 1, SCHEDULE 13D/A 1).

| Filed | Accepted | Form | What it is | Accession |
| --- | --- | --- | --- | --- |
| 2026-08-24 | 06:15 ET | [8-K](/filings/0001193125-26-361724.md) | 5.02 Departure or appointment of officers or directors; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001193125-26-361724 |
| 2026-08-06 | 16:03 ET | [10-Q](/filings/0001708035-26-000090.md) | Quarterly report, period 2026-06-30 | 0001708035-26-000090 |
| 2026-08-05 | 06:00 ET | [8-K](/filings/0001708035-26-000087.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001708035-26-000087 |
| 2026-06-30 | 16:05 ET | [8-K](/filings/0001193125-26-290479.md) | 1.01 Entry into a material agreement; 2.03 New direct financial obligation; 8.01 Other events; 9.01 Financial statements and exhibits | 0001193125-26-290479 |
| 2026-05-21 | 16:02 ET | [8-K](/filings/0001708035-26-000070.md) | 5.07 Shareholder vote results | 0001708035-26-000070 |
| 2026-05-05 | 16:00 ET | [10-Q](/filings/0001708035-26-000067.md) | Quarterly report, period 2026-03-31 | 0001708035-26-000067 |
| 2026-05-05 | 06:00 ET | [8-K](/filings/0001708035-26-000063.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001708035-26-000063 |
| 2026-05-04 | 07:44 ET | [8-K](/filings/0001193125-26-202584.md) | 1.01 Entry into a material agreement; 9.01 Financial statements and exhibits | 0001193125-26-202584 |
| 2026-04-15 | 17:16 ET | [DEF 14A](/filings/0001140361-26-014838.md) | Proxy statement, period 2026-05-20 | 0001140361-26-014838 |
| 2026-02-27 | 16:01 ET | [10-K](/filings/0001708035-26-000053.md) | Annual report, period 2025-12-31 | 0001708035-26-000053 |
| 2026-02-26 | 06:02 ET | [8-K](/filings/0001708035-26-000047.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001708035-26-000047 |
| 2026-01-07 | 16:15 ET | [8-K](/filings/0001708035-26-000010.md) | 2.01 Completion of an acquisition or disposition; 2.04 Item not in the standard list; 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001708035-26-000010 |
| 2025-12-12 | 16:30 ET | [8-K](/filings/0001193125-25-317640.md) | 5.02 Departure or appointment of officers or directors | 0001193125-25-317640 |
| 2025-11-05 | 16:01 ET | [10-Q](/filings/0001708035-25-000118.md) | Quarterly report, period 2025-09-30 | 0001708035-25-000118 |
| 2025-11-04 | 06:02 ET | [8-K](/filings/0001708035-25-000115.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001708035-25-000115 |
| 2025-09-11 | 16:44 ET | [8-K](/filings/0001193125-25-201371.md) | 1.01 Entry into a material agreement; 9.01 Financial statements and exhibits | 0001193125-25-201371 |
| 2025-08-11 | 16:05 ET | [8-K](/filings/0001193125-25-177926.md) | 5.02 Departure or appointment of officers or directors | 0001193125-25-177926 |
| 2025-08-07 | 16:02 ET | [10-Q](/filings/0001708035-25-000108.md) | Quarterly report, period 2025-06-30 | 0001708035-25-000108 |
| 2025-08-07 | 06:00 ET | [8-K](/filings/0001708035-25-000104.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001708035-25-000104 |
| 2025-07-02 | 16:28 ET | [SCHEDULE 13D/A](/filings/0000950157-25-000552.md) | Ownership report, active investor, amended | 0000950157-25-000552 |
| 2025-05-09 | 16:01 ET | [8-K](/filings/0001708035-25-000086.md) | 5.07 Shareholder vote results | 0001708035-25-000086 |
| 2025-05-02 | 16:00 ET | [10-Q](/filings/0001708035-25-000083.md) | Quarterly report, period 2025-03-31 | 0001708035-25-000083 |
| 2025-05-01 | 06:01 ET | [8-K](/filings/0001708035-25-000076.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001708035-25-000076 |
| 2025-04-11 | 07:07 ET | [8-K](/filings/0001193125-25-078475.md) | 1.01 Entry into a material agreement; 2.03 New direct financial obligation; 9.01 Financial statements and exhibits | 0001193125-25-078475 |
| 2025-04-08 | 11:55 ET | [DEF 14A](/filings/0001140361-25-012747.md) | Proxy statement, period 2025-05-08 | 0001140361-25-012747 |
| 2025-02-28 | 16:01 ET | [10-K](/filings/0001708035-25-000070.md) | Annual report, period 2024-12-31 | 0001708035-25-000070 |
| 2025-02-27 | 06:02 ET | [8-K](/filings/0001708035-25-000063.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001708035-25-000063 |
| 2025-01-31 | 08:12 ET | [8-K](/filings/0001193125-25-017743.md) | 1.01 Entry into a material agreement; 2.03 New direct financial obligation; 9.01 Financial statements and exhibits | 0001193125-25-017743 |
| 2024-12-16 | 16:18 ET | [8-K](/filings/0001708035-24-000120.md) | 5.02 Departure or appointment of officers or directors | 0001708035-24-000120 |
| 2024-11-01 | 16:07 ET | [10-Q](/filings/0001708035-24-000117.md) | Quarterly report, period 2024-09-30 | 0001708035-24-000117 |
| 2024-10-31 | 06:02 ET | [8-K](/filings/0001708035-24-000114.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001708035-24-000114 |
| 2024-08-02 | 16:01 ET | [10-Q](/filings/0001708035-24-000101.md) | Quarterly report, period 2024-06-30 | 0001708035-24-000101 |
| 2024-08-01 | 06:02 ET | [8-K](/filings/0001708035-24-000097.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001708035-24-000097 |
| 2024-06-12 | 16:31 ET | [8-K](/filings/0001193125-24-159982.md) | 1.01 Entry into a material agreement; 2.03 New direct financial obligation; 9.01 Financial statements and exhibits | 0001193125-24-159982 |
| 2024-05-09 | 06:35 ET | [8-K](/filings/0001193125-24-134734.md) | 5.03 Amendment to articles or bylaws; 5.07 Shareholder vote results; 8.01 Other events; 9.01 Financial statements and exhibits | 0001193125-24-134734 |
| 2024-05-09 | 06:30 ET | [8-K/A](/filings/0001193125-24-134730.md) | 5.02 Departure or appointment of officers or directors | 0001193125-24-134730 |
| 2024-05-06 | 06:31 ET | [8-K](/filings/0001193125-24-131364.md) | 5.02 Departure or appointment of officers or directors | 0001193125-24-131364 |
| 2024-05-03 | 16:08 ET | [10-Q](/filings/0001708035-24-000083.md) | Quarterly report, period 2024-03-31 | 0001708035-24-000083 |
| 2024-05-02 | 06:10 ET | [8-K](/filings/0001708035-24-000080.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001708035-24-000080 |
| 2024-04-08 | 17:16 ET | [DEF 14A](/filings/0001140361-24-018656.md) | Proxy statement, period 2024-05-08 | 0001140361-24-018656 |
| 2024-02-29 | 16:02 ET | [10-K](/filings/0001708035-24-000070.md) | Annual report, period 2023-12-31 | 0001708035-24-000070 |
| 2024-02-28 | 06:31 ET | [8-K](/filings/0001193125-24-049054.md) | 5.02 Departure or appointment of officers or directors; 8.01 Other events | 0001193125-24-049054 |
| 2024-02-28 | 06:02 ET | [8-K](/filings/0001708035-24-000065.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001708035-24-000065 |
| 2023-12-18 | 06:16 ET | [8-K](/filings/0001193125-23-297060.md) | 5.02 Departure or appointment of officers or directors; 7.01 Regulation FD disclosure | 0001193125-23-297060 |
| 2023-11-28 | 08:56 ET | [8-K](/filings/0001193125-23-283808.md) | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001193125-23-283808 |
| 2023-11-03 | 16:22 ET | [10-Q](/filings/0001708035-23-000039.md) | Quarterly report, period 2023-09-30 | 0001708035-23-000039 |
| 2023-11-02 | 06:10 ET | [8-K](/filings/0001708035-23-000035.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001708035-23-000035 |
| 2023-08-08 | 08:18 ET | [10-Q](/filings/0001708035-23-000029.md) | Quarterly report, period 2023-06-30 | 0001708035-23-000029 |
| 2023-08-03 | 06:32 ET | [8-K](/filings/0001708035-23-000026.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001708035-23-000026 |
| 2023-06-27 | 16:07 ET | [SC 13D/A](/filings/0000950157-23-000706.md) | Ownership report, active investor, amended | 0000950157-23-000706 |

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Source: SEC EDGAR, the company’s filing index. Last ingested by Listed: Oct 24, 2026, 15:15 ET. No prices; not investment advice.