---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-202584"
form_type: "8-K"
ticker: "ECVT"
cik: "0001708035"
company_name: "Ecovyst Inc."
filed_at: "2026-05-04T23:59:59+00:00"
generated_at: "2026-05-14T23:56:21.829501+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Ecovyst to acquire INEOS Calabrian SO2 business for $190M

## Summary
- Purchase price of $190M for entire issued share capital of INEOS Calabrian Holdings Corp. and INEOS Calabrian Corporation Canada, Inc.
- Transaction expected to close in Q2 2026, subject to customary closing conditions including regulatory and MAC.
- Acquisition includes on-purpose SO2 and derivatives: sodium metabisulfite, bisulfite, and thiosulfate.
- Ecovyst will procure a warranty and indemnity insurance policy at its own cost; Sellers provide limited indemnities.
- Debt financing to be used; Sellers provide fundamental, business, and tax warranties with repetition at closing.

## SEC filing metadata
- accession: 0001193125-26-202584
- form_type: 8-K
- ticker: ECVT
- cik: 0001708035
- company_name: Ecovyst Inc.
- filed_at: 2026-05-04T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.75
- confidence: high
- sec_items: 1.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1708035/000119312526202584/0001193125-26-202584-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1708035/000119312526202584/d311325d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-202584
- JSON: https://secwatch.observer/filing/0001193125-26-202584.json
- Plain text: https://secwatch.observer/filing/0001193125-26-202584.txt

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