---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-24-134339"
form_type: "8-K"
ticker: "KOP"
cik: "0001315257"
company_name: "Koppers Holdings Inc."
filed_at: "2024-12-09T23:59:59+00:00"
generated_at: "2026-05-29T05:33:27.060461+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.35
calibrated_materiality_score: 0.35
confidence: "high"
source: SEC EDGAR
---

# Koppers SVP & Chief Sustainability Officer Leslie Hyde to retire; transition to Assistant to CEO until March 2025

## Summary
- Leslie S. Hyde, SVP & Chief Sustainability Officer of Koppers Inc., will retire effective March 31, 2025.
- Effective December 9, 2024, Hyde vacates current role and serves as Assistant to the CEO through retirement.
- Transition is part of a managed plan; no replacement named in the filing.

## SEC filing metadata
- accession: 0000950170-24-134339
- form_type: 8-K
- ticker: KOP
- cik: 0001315257
- company_name: Koppers Holdings Inc.
- filed_at: 2024-12-09T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.35
- calibrated_materiality_score: 0.35
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1315257/000095017024134339/0000950170-24-134339-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1315257/000095017024134339/kop-20241205.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-24-134339
- JSON: https://secwatch.observer/filing/0000950170-24-134339.json
- Plain text: https://secwatch.observer/filing/0000950170-24-134339.txt

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