Ecovyst (ECVT)Rubric Capital Management LP added to its stake +5.69M shares

10.4M

Shares reported · +5.69M vs prior quarter

1.0%

Disclosed portfolio weight

$91.1M

Reported value

Holdings as of

Sep 30, 2025

Filed

Nov 14, 2025

The story around this disclosure

Every dated public record OQRO holds about the company from 60 days before to 120 days after, oldest first. It shows what was going on; none of it is a stated reason for the trade.

1. Nov 4, 2025Company filing · Form 8-K · ResultsReported its results

What came next

1. Dec 8, 2025Company filing · Form 8-K · Executive changeChanged a top executive or board member“On December 8, 2025, the Compensation Committee (the “Committee”) of the Board of Directors of Ecovyst Inc. (the “Company”) approved a supplemental bonus grant to Paul Whittleston, the Company’s Vice President and President – Advanced Materials & Catalysts (“AM&C”), pursuant to the retention bonus program previously adopted by the Committee on December 9, 2024 and under which certain employees of the Company,…”
2. Dec 31, 2025Company filing · Form 8-K · Acquisition or sale, Debt acceleratedCompleted buying or selling a business or assets, and had a debt or obligation accelerated (and 1 more item)“Departure of Paul Whittleston, Vice President and President, Advanced Materials & Catalysts At the closing of the Transaction discussed in Item 2.01 above, Paul Whittleston, Vice President and President, Advanced Materials & Catalysts, ceased to be an officer of, and terminated employment with, the Company.”
3. Feb 26, 2026Company filing · Form 8-K · ResultsReported its results

How to read SEC Form 13F-HR

Form 13F is the quarterly report in which investment managers that oversee $100 million or more list the US-listed stocks and some other securities they held on the last day of the quarter.

Full guide: What is an SEC Form 13F?

What else is on file for Ecovyst

For Ecovyst, OQRO holds 1 fund holdings report (13F) dated in the last 90 days.

These are records OQRO holds, counted by their date, not a measure of how much trading took place. Routine paperwork such as option exercises and tax withholding is left out. Everything for the company is on its ECVT page.

How this filing works

• SEC Form 13F

Other disclosures at Ecovyst

• SEC Form 13F-HRAug 14, 2026
• SEC Form 13F-HRMay 15, 2026
• SEC Form 13F-HRMay 15, 2026
• SEC Form 13F-HRFeb 17, 2026
• SEC Form 13F-HRNov 14, 2025
• SEC Form 13F-HRNov 14, 2025

Everything OQRO holds on this company is on its ECVT page.