---
schema_version: "secwatch.filing_event.v1"
accession: "0001315257-25-000010"
form_type: "8-K"
ticker: "KOP"
cik: "0001315257"
company_name: "Koppers Holdings Inc."
filed_at: "2025-11-07T23:59:59+00:00"
generated_at: "2026-05-16T22:57:57.188094+00:00"
event_type: "earnings"
sentiment: "neutral"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# Koppers Holdings reports Q3 2025 results: net sales down 12.4%, net income up 4.4%

## Summary
- Sales of $485.3 million vs. $554.3 million in prior year quarter, a decrease of 12.4%.
- Net income attributable to Koppers of $23.8 million vs. $22.8 million, an increase of 4.4%.
- Diluted EPS of $1.17 vs. $1.09 in prior year quarter, up 7.3%.
- Adjusted EBITDA of $70.9 million vs. $77.4 million, down 8.4%.
- Year-to-date capital expenditures net of insurance proceeds and sale of assets of $33.7 million vs. $55.0 million.

## SEC filing metadata
- accession: 0001315257-25-000010
- form_type: 8-K
- ticker: KOP
- cik: 0001315257
- company_name: Koppers Holdings Inc.
- filed_at: 2025-11-07T23:59:59+00:00
- event_type: earnings
- sentiment: neutral
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1315257/000131525725000010/0001315257-25-000010-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1315257/000131525725000010/kop-20251107.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001315257-25-000010
- JSON: https://secwatch.observer/filing/0001315257-25-000010.json
- Plain text: https://secwatch.observer/filing/0001315257-25-000010.txt

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