---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-139007"
form_type: "8-K"
ticker: "WLK"
cik: "0001262823"
company_name: "WESTLAKE CORP"
filed_at: "2026-04-02T23:59:59+00:00"
generated_at: "2026-05-15T07:48:12.702223+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Westlake appoints Brian Powers as Performance & Essential Materials Segment Head; Buesinger becomes advisor

## Summary
- Robert F. Buesinger steps down as EVP & Segment Head; transitions to Special Advisor to President effective April 2, 2026.
- Brian Powers appointed Senior Vice President, Performance & Essential Materials Segment Head, effective April 2, 2026.
- Succession follows Buesinger's planned retirement; no departure reason beyond retirement mentioned.

## SEC filing metadata
- accession: 0001193125-26-139007
- form_type: 8-K
- ticker: WLK
- cik: 0001262823
- company_name: WESTLAKE CORP
- filed_at: 2026-04-02T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1262823/000119312526139007/0001193125-26-139007-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1262823/000119312526139007/d129281d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-139007
- JSON: https://secwatch.observer/filing/0001193125-26-139007.json
- Plain text: https://secwatch.observer/filing/0001193125-26-139007.txt

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