Ecovyst Includes Target Annual Bonuses in Executive Severance Calculations

• Ecovyst adopted a revised severance plan effective October 22, 2026, defining executive compensation as base salary plus target annual bonus.
• Outside change-in-control protection, termination without cause or resignation for good reason qualifies executives for 52 weeks' compensation; the CEO receives 104 weeks.
• During protection, qualifying severance is the greater of standard benefits or 18 months' compensation for executives, 30 months for the CEO.
• The protection period runs from six months before to 24 months following a change in control; qualifying severance is paid in a lump sum.
• Executives with individual severance agreements receive whichever provides greater benefits: their agreement or the revised plan.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. Ecovyst Inc. published the original content used to generate this news brief via EDGAR, the Electronic Data Gathering, Analysis, and Retrieval system operated by the U.S. Securities and Exchange Commission (Ref. ID: 0001193125-26-436179), on October 28, 2026, and is solely responsible for the information contained therein.