Koppers Holdings (NYSE:KOP) lowers FY2026 Adj EPS guidance from $4.20-$5.00 to $3.80-$4.60 vs $4.18 analyst estimate. Affirms FY2026 sales outlook from $1.900 billion-$2.000 billion to $1.900 billion-$2.000 billion vs $1.915 billion estimate.