---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-25-067521"
form_type: "8-K"
ticker: "KOP"
cik: "0001315257"
company_name: "Koppers Holdings Inc."
filed_at: "2025-05-09T23:59:59+00:00"
generated_at: "2026-05-22T01:26:49.579328+00:00"
event_type: "earnings"
sentiment: "neutral"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Koppers Q1 sales down 8.3% to $456.5M, net loss of $13.9M, adjusted EPS up 14.5%

## Summary
- Net loss of $13.9M vs $13.0M income in prior year; GAAP diluted EPS loss of $0.68.
- Adjusted EPS of $0.71 up 14.5% from $0.62; adjusted EBITDA $55.5M up 7.8%.
- Sales decreased 8.3% to $456.5M from $497.6M; maintained 2025 adjusted EBITDA and EPS outlook.
- Capital expenditures $14.3M, down from $26.3M; capex net of insurance and asset sales $10.0M.

## SEC filing metadata
- accession: 0000950170-25-067521
- form_type: 8-K
- ticker: KOP
- cik: 0001315257
- company_name: Koppers Holdings Inc.
- filed_at: 2025-05-09T23:59:59+00:00
- event_type: earnings
- sentiment: neutral
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 2.02, 5.02, 5.07, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1315257/000095017025067521/0000950170-25-067521-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1315257/000095017025067521/kop-20250508.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-25-067521
- JSON: https://secwatch.observer/filing/0000950170-25-067521.json
- Plain text: https://secwatch.observer/filing/0000950170-25-067521.txt

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