---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-318445"
form_type: "8-K"
ticker: "WLK"
cik: "0001262823"
company_name: "WESTLAKE CORP"
filed_at: "2025-12-15T23:59:59+00:00"
generated_at: "2026-05-16T13:11:02.246531+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.9
calibrated_materiality_score: 0.9
confidence: "high"
source: SEC EDGAR
---

# Westlake approves closure of three chlorovinyl plants and styrene unit, expects $415M in pre-tax costs

## Summary
- Closure includes PVC plant in Aberdeen, MS (1B lbs/year), VCM plant in Lake Charles, LA North (910M lbs/year), and a chlor-alkali unit (825M lbs chlorine, 910M lbs caustic soda).
- Styrene plant in Lake Charles, LA (570M lbs/year) also to cease operations by end of December 2025.
- Workforce reduction of approximately 295 employees; total pre-tax costs estimated at $415M including $357M non-cash charges, $25M severance, $33M shutdown costs.
- Company expects ~$100M annual EBITDA improvement and ~$175M free cash flow savings in 2026 from these actions.
- Conference call on December 15, 2025 to discuss plan and update on PEM profitability improvement plan.

## SEC filing metadata
- accession: 0001193125-25-318445
- form_type: 8-K
- ticker: WLK
- cik: 0001262823
- company_name: WESTLAKE CORP
- filed_at: 2025-12-15T23:59:59+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.9
- calibrated_materiality_score: 0.9
- confidence: high
- sec_items: 2.05, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1262823/000119312525318445/0001193125-25-318445-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1262823/000119312525318445/d798286d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-318445
- JSON: https://secwatch.observer/filing/0001193125-25-318445.json
- Plain text: https://secwatch.observer/filing/0001193125-25-318445.txt

## Source-grounded claims
- claim_id: 3cb91552c6ac76afa62058e633453816765cea5c
  claim: WESTLAKE CORP announced a restructuring with charges of approximately $415 million affecting North American chlorovinyl production facilities and styrene production plant (approximately 295 employees).
  evidence_excerpt: The closures of the facilities are expected to result in a workforce reduction of approximately 295 employees. The Company expects it will incur total pre-tax costs of approximately $415 million related to the closures of the facilities consisting of noncash accelerated depreciation, amortization, and asset write-off charges of approximately $357 million, employee severance and separation costs of approximately $25 million, and other plant shut down costs of approximately $33 million.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1262823/000119312525318445/0001193125-25-318445-index.htm

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