Joseph S. Koscinski - 04 Mar 2026 Form 4 Insider Report for Ecovyst Inc. (ECVT)

Reporting relationship: Vice President, Chief Administrative Officer, General Counsel and Secretary
Issuer ticker: ECVT
Reported as of: 04 Mar 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 06 Mar 2026, 16:00:36 UTC
Prior SEC filing: 05 Feb 2026
Source filing: View source filing
Reporting owner signature: /s/ Joseph S. Koscinski

Key filing fact

Joseph S. Koscinski filed Form 4 for Ecovyst Inc. (ECVT) on 06 Mar 2026.

Key facts

This page summarizes Joseph S. Koscinski's Form 4 filing for Ecovyst Inc. (ECVT).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 06 Mar 2026, 16:00.

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

CIK 0001717992 Primary reporting owner

Relationship: Vice President, Chief Administrative Officer, General Counsel and Secretary
Address: C/O ECOVYST INC., 600 LEE ROAD, SUITE 200, WAYNE
Signature: /s/ Joseph S. Koscinski
Signature date: 06 Mar 2026

Shares, units, or other non-derivative securities reported in this filing.

ECVT transaction

Award

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

SEC remarks

Vice President, Chief Administrative Officer, General Counsel and Secretary