---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-24-133737"
form_type: "8-K"
ticker: "KOP"
cik: "0001315257"
company_name: "Koppers Holdings Inc."
filed_at: "2024-12-05T23:59:59+00:00"
generated_at: "2026-05-29T07:00:55.394222+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Koppers to cease phthalic anhydride production at Stickney, IL facility by mid-2025, expects $51-55M pre-tax charges

## Summary
- Pre-tax charges of $51-55M through end of 2026; $28M non-cash, $23-27M cash for cleaning, demolition, severance.
- Closure impacts ~25 employees; coal tar distillation operations at Stickney will continue unchanged.
- Decision driven by significant near-term capital requirements and declining coal-tar feedstock availability.
- Savings from closure incorporated into 2025 targets: $300M adjusted EBITDA and $65-75M capex.
- Environmental benefit: annual emissions of regulated air contaminants expected to drop 50-70%.

## SEC filing metadata
- accession: 0000950170-24-133737
- form_type: 8-K
- ticker: KOP
- cik: 0001315257
- company_name: Koppers Holdings Inc.
- filed_at: 2024-12-05T23:59:59+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 2.05, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1315257/000095017024133737/0000950170-24-133737-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1315257/000095017024133737/kop-20241205.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-24-133737
- JSON: https://secwatch.observer/filing/0000950170-24-133737.json
- Plain text: https://secwatch.observer/filing/0000950170-24-133737.txt

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