---
schema_version: "secwatch.filing_event.v1"
accession: "0001262823-25-000026"
form_type: "8-K"
ticker: "WLK"
cik: "0001262823"
company_name: "WESTLAKE CORP"
filed_at: "2025-05-02T23:59:59+00:00"
generated_at: "2026-05-22T22:15:50.662768+00:00"
event_type: "earnings"
sentiment: "negative"
materiality_score: 0.85
calibrated_materiality_score: 0.85
confidence: "high"
source: SEC EDGAR
---

# Westlake posts Q1 net loss of $40M; EBITDA down 47% YoY on higher costs and outages

## Summary
- Net loss of $40M ($0.31 diluted loss) vs net income of $174M ($1.34) in Q1 2024.
- EBITDA of $288M, down 47% YoY; EBITDA margin fell to 10% from 18%.
- Higher NA feedstock/energy costs (~$100M YoY) and ~$80M from turnarounds/outages hit results.
- PEM segment operating loss of $163M vs income of $22M YoY; HIP income down 30% to $148M.
- HIP segment 2025 guidance lowered to low ends of $4.4-4.6B revenue and 20-22% margin; capex cut to $900M.

## SEC filing metadata
- accession: 0001262823-25-000026
- form_type: 8-K
- ticker: WLK
- cik: 0001262823
- company_name: WESTLAKE CORP
- filed_at: 2025-05-02T23:59:59+00:00
- event_type: earnings
- sentiment: negative
- materiality_score: 0.85
- calibrated_materiality_score: 0.85
- confidence: high
- sec_items: 2.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1262823/000126282325000026/0001262823-25-000026-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1262823/000126282325000026/wlk-20250502.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001262823-25-000026
- JSON: https://secwatch.observer/filing/0001262823-25-000026.json
- Plain text: https://secwatch.observer/filing/0001262823-25-000026.txt

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