---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-24-186619"
form_type: "8-K"
ticker: "WLK"
cik: "0001262823"
company_name: "WESTLAKE CORP"
filed_at: "2024-07-29T23:59:59+00:00"
generated_at: "2026-05-31T15:44:05.637431+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# Westlake to mothball AC and ECH units at Pernis; expects EUR 80M pre-tax costs

## Summary
- Approved mothball of allyl chloride and epichlorohydrin units at Pernis, Netherlands; expected to cease operations in 2025.
- Total pre-tax costs of approximately EUR 80 million: EUR 5M severance and EUR 75M environmental remediation and other mothballing costs.
- Workforce reduction of ~30 employees; costs recorded in Q3 2024 with cash outflows over several years starting 2025.
- Company expects material improvement in Pernis site financial performance while continuing BPA, LER, and specialty resin operations.

## SEC filing metadata
- accession: 0001193125-24-186619
- form_type: 8-K
- ticker: WLK
- cik: 0001262823
- company_name: WESTLAKE CORP
- filed_at: 2024-07-29T23:59:59+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 2.05
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1262823/000119312524186619/0001193125-24-186619-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1262823/000119312524186619/d837479d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-24-186619
- JSON: https://secwatch.observer/filing/0001193125-24-186619.json
- Plain text: https://secwatch.observer/filing/0001193125-24-186619.txt

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