---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-24-131364"
form_type: "8-K"
ticker: "ECVT"
cik: "0001708035"
company_name: "Ecovyst Inc."
filed_at: "2024-05-06T23:59:59+00:00"
generated_at: "2026-06-02T22:12:19.363551+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.2
calibrated_materiality_score: 0.2
confidence: "high"
source: SEC EDGAR
---

# Director Robert Coxon resigns from Ecovyst Board for health reasons effective May 8, 2024

## Summary
- Robert Coxon notified Ecovyst on May 3, 2024 of his resignation from the Board.
- Resignation effective 5:00 p.m. ET on May 8, 2024; Coxon had served since 2007.
- Resignation is due to personal health reasons, not any disagreement with the company.
- Board size to decrease from nine to eight members upon effectiveness of resignation.

## SEC filing metadata
- accession: 0001193125-24-131364
- form_type: 8-K
- ticker: ECVT
- cik: 0001708035
- company_name: Ecovyst Inc.
- filed_at: 2024-05-06T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.2
- calibrated_materiality_score: 0.2
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1708035/000119312524131364/0001193125-24-131364-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1708035/000119312524131364/d810587d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-24-131364
- JSON: https://secwatch.observer/filing/0001193125-24-131364.json
- Plain text: https://secwatch.observer/filing/0001193125-24-131364.txt

## Key facts
- Executive change
  Robert Coxon departed as Director at Ecovyst Inc..
  - Action: resigning
  - Role: Director
  source text: On May 3, 2024, Robert Coxon notified Ecovyst Inc. (the “Company”) that he would be resigning from the Company’s Board of Directors (the “Board”), effective 5:00 p.m. Eastern Time on May 8, 2024.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1708035/000119312524131364/0001193125-24-131364-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.