Why Koppers Holdings Stock Flopped on Friday

Koppers Holdings stock plummeted 24.39% after missing earnings expectations on both revenue and net income in Q3 2026. The specialty chemical company reported sales of $499 million versus consensus estimate of $512 million, and adjusted net income of $0.77 per share versus expected $1.34 per share. Rising materials and logistics costs significantly impacted profitability. Management cut full-year guidance and plans price increases in 2027, which may face resistance from cost-sensitive customers.