---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-201371"
form_type: "8-K"
ticker: "ECVT"
cik: "0001708035"
company_name: "Ecovyst Inc."
filed_at: "2025-09-11T23:59:59+00:00"
generated_at: "2026-05-17T06:53:26.281643+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.9
calibrated_materiality_score: 0.9
confidence: "high"
source: SEC EDGAR
---

# Ecovyst to sell Advanced Materials & Catalysts business to Technip Energies for $556M cash

## Summary
- Purchase price $556M in cash, subject to adjustments for debt, cash, working capital and transaction expenses.
- Expected closing in Q1 2026; subject to HSR antitrust clearance and other customary conditions.
- Business includes silicas, catalysts and 50% stake in Zeolyst joint ventures.
- Transition services to be provided for up to 13 months post-close.
- Termination rights if deal not closed by March 10, 2026 (extendable to May 7, 2026).

## SEC filing metadata
- accession: 0001193125-25-201371
- form_type: 8-K
- ticker: ECVT
- cik: 0001708035
- company_name: Ecovyst Inc.
- filed_at: 2025-09-11T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.9
- calibrated_materiality_score: 0.9
- confidence: high
- sec_items: 1.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1708035/000119312525201371/0001193125-25-201371-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1708035/000119312525201371/d897813d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-201371
- JSON: https://secwatch.observer/filing/0001193125-25-201371.json
- Plain text: https://secwatch.observer/filing/0001193125-25-201371.txt

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