---
schema_version: "secwatch.filing_event.v1"
accession: "0001262823-26-000019"
form_type: "8-K"
ticker: "WLK"
cik: "0001262823"
company_name: "WESTLAKE CORP"
filed_at: "2026-05-05T23:59:59+00:00"
generated_at: "2026-05-14T23:14:26.280195+00:00"
event_type: "earnings"
sentiment: "negative"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Westlake Q1 net loss $169M ($1.31/sh); EBITDA excl. items $235M, down 20% YoY

## Summary
- Net loss of $169M (diluted loss $1.31); excl. $85M items net loss $100M ($0.77).
- Revenue $2.65B, down 7% YoY from $2.85B; EBITDA excl. items $235M vs $295M YoY.
- HIP segment sales $993M; EBITDA excl. items $186M (19% margin); Pipe & Fittings volume up on infrastructure.
- PEM segment sales $1.66B; EBITDA excl. items $36M (2% margin); hit by higher natural gas costs.
- Targeting $600M EBITDA uplift in 2026 from cost actions; closed ACI acquisition in Jan 2026.

## SEC filing metadata
- accession: 0001262823-26-000019
- form_type: 8-K
- ticker: WLK
- cik: 0001262823
- company_name: WESTLAKE CORP
- filed_at: 2026-05-05T23:59:59+00:00
- event_type: earnings
- sentiment: negative
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 2.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1262823/000126282326000019/0001262823-26-000019-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1262823/000126282326000019/wlk-20260505.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001262823-26-000019
- JSON: https://secwatch.observer/filing/0001262823-26-000019.json
- Plain text: https://secwatch.observer/filing/0001262823-26-000019.txt

## Source-grounded claims
- claim_id: 45b934dab9b6c83badaf8c1bd2c65f7e7c21c485
  claim: WESTLAKE CORP reported first quarter 2026 results: revenue $2,652, net income Net loss attributable to Westlake Corporation $ (169), EPS Diluted loss per common share $ (1.31).
  evidence_excerpt: except per share data and percentages) Three Months Ended March 31, 2026 Three Months Ended December 31, 2025 Three Months Ended March 31, 2025 Westlake Corporation Net sales $ 2,652 $ 2,533 $ 2,846 Loss from operations $ (172) $ (671) $ (32) Net loss attributable to Westlake Corporation $ (169) $ (544) $ (40) Diluted loss per common share $ (1.31) $ (4.22) $
  evidence_url: https://www.sec.gov/Archives/edgar/data/1262823/000126282326000019/0001262823-26-000019-index.htm

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