---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-23-017934"
form_type: "8-K/A"
ticker: "KOP"
cik: "0001315257"
company_name: "Koppers Holdings Inc."
filed_at: "2023-05-04T23:59:59+00:00"
generated_at: "2026-06-15T21:00:56.320421+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.2
calibrated_materiality_score: 0.2
confidence: "high"
source: SEC EDGAR
---

# Koppers assigns new director Sandifer to Audit, Governance, and Strategy committees

## Summary
- Andrew D. Sandifer appointed to Audit Committee effective May 4, 2023.
- Also appointed to Nominating and Corporate Governance Committee.
- Also appointed to Strategy and Risk Committee.
- This amends the original March 22, 2023 8-K that reported his election.

## SEC filing metadata
- accession: 0000950170-23-017934
- form_type: 8-K/A
- ticker: KOP
- cik: 0001315257
- company_name: Koppers Holdings Inc.
- filed_at: 2023-05-04T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.2
- calibrated_materiality_score: 0.2
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1315257/000095017023017934/0000950170-23-017934-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1315257/000095017023017934/kop-20230504.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-23-017934
- JSON: https://secwatch.observer/filing/0000950170-23-017934.json
- Plain text: https://secwatch.observer/filing/0000950170-23-017934.txt

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