Ecovyst Inc has 10 Schedule 13D or 13G filings on record since 2025-07-02. 5 holders' latest filing reports 5% or more of common stock. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Rubric Capital Management LP | 9.09% | 10,400,000 | SCHEDULE 13G, 2025-11-14 | 2025-09-30 |
| BlackRock, Inc. | 7.7% | 8,526,153 | SCHEDULE 13G/A, 2026-04-24 | 2026-03-31 |
| Dimensional Fund Advisors LP | 6% | 6,585,047 | SCHEDULE 13G/A, 2026-07-14 | 2026-06-30 |
| Vanguard Portfolio Management | 5.65% | 6,191,928 | SCHEDULE 13G, 2026-07-31 | 2026-06-30 |
| Vanguard Capital Management | 5.25% | 5,814,039 | SCHEDULE 13G, 2026-04-29 | 2026-03-31 |
| Hotchkis and Wiley Capital Management, LLC | 4.9% | 5,413,862 | SCHEDULE 13G/A, 2026-05-08 | 2026-03-31 |
| INEOS Limited | 0% | 0 | SCHEDULE 13D/A, 2025-07-02 | 2025-06-30 |
| The Vanguard Group | 0% | 0 | SCHEDULE 13G/A, 2026-03-26 | 2026-03-13 |
Purpose of Transaction (Item 4)
INEOS Limited
Item 4 of the Original Schedule 13D is hereby amended and supplemented by adding the following: On June 30, 2025, INEOS sold 9,040,415 shares of Common Stock in a private transaction to a broker-dealer at a price per share of $7.60. As a result of such sale, the Reporting Persons no longer beneficially own any shares of Common Stock or have any voting power or dispositive power over any shares of Common Stock.Item 4 of the SCHEDULE 13D/A filed 2025-07-02
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-07-02 | INEOS Limited | 0% | SCHEDULE 13D/A |
| 2025-08-13 | Hotchkis and Wiley Capital Management, LLC | 9.56% | SCHEDULE 13G/A |
| 2025-11-14 | Rubric Capital Management LP | 9.09% | SCHEDULE 13G |
| 2025-11-14 | Hotchkis and Wiley Capital Management, LLC | 7.74% | SCHEDULE 13G/A |
| 2026-03-26 | The Vanguard Group | 0% | SCHEDULE 13G/A |
| 2026-04-24 | BlackRock, Inc. | 7.7% | SCHEDULE 13G/A |
| 2026-04-29 | Vanguard Capital Management | 5.25% | SCHEDULE 13G |
| 2026-05-08 | Hotchkis and Wiley Capital Management, LLC | 4.9% | SCHEDULE 13G/A |
| 2026-07-14 | Dimensional Fund Advisors LP | 6% | SCHEDULE 13G/A |
| 2026-07-31 | Vanguard Portfolio Management | 5.65% | SCHEDULE 13G |
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.