Ecovyst Inc
Ownership
Ownership Structure
Who owns Ecovyst Inc (ECVT)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 90.6% of the shares are freely tradable; institutional investors hold 105.6%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Rubric Capital Management LP | 8.35 | 9,136,067 | -13.0 | 03/31/2026 |
| BlackRock Inc | 7.98 | 8,734,220 | -16.4 | 03/31/2026 |
| Dimensional Fund Advisors, Inc. | 6.02 | 6,585,047 | +1.3 | 06/30/2026 |
| Hotchkis & Wiley Capital Management LLC | 4.95 | 5,413,862 | -43.4 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 4.79 | 5,244,406 | +0.0 | 03/31/2026 |
| Vanguard Capital Management, LLC | 4.55 | 4,977,580 | +0.0 | 03/31/2026 |
| Brown Advisory Holdings Inc | 4.42 | 4,842,174 | -3.6 | 03/31/2026 |
| Arrowstreet Capital Limited Partnership | 4.41 | 4,829,034 | +246.6 | 03/31/2026 |
| FMR Inc | 4.08 | 4,467,425 | +924.5 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 3.18 | 3,476,568 | +0.0 | 07/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Bergman Laurie | See Remarks | 43,353 | 459,542 $ | Aug 24, 2026 | direct |
| Humble Patti A. | Director | 33,974 | 360,124 $ | Sep 10, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 10, 2026 | Humble Patti A. | Director | Buy | 24,875 | 10.05 | 249,994 |
| Aug 24, 2026 | Bergman Laurie | See Remarks | Other | 43,353 | 0.00 | – |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: September 17, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.