Koppers Holdings Inc. (KOP:NYSE) closed at $40.18 on October 23, 2026, down 1.40% on the day. The stock trades 24.2% below its 52-week high of $53.00 and 60.7% above its 52-week low of $25.00. Over the past year, it gained 37.9%. Koppers Holdings Inc. is part of the Basic Industries sector (Forest Products).
In 252 trading sessions since October 23, 2025, KOP closed higher on 135 days (54%). Its best day was February 26, 2026 (+7.88%) and its worst was August 11, 2026 (-8.96%). It never moved 10% or more in a single session.
Koppers Holdings Inc. provides treated wood products, wood treatment chemicals, and carbon compounds in the United States and internationally. The company operates through three segments: Railroad and Utility Products and Services (RUPS), Performance Chemicals (PC), and Carbon Materials and Chemicals (CMC). The RUPS segment procures and treats crossties, switch ties, and various types of lumber used for railroad bridges and crossings. It also provides rail joint bars to join rails together for railroads; transmission and distribution poles for electric and telephone utilities; and pilings. This segment also provides railroad services, such as engineering, design, repair, and inspection services for railroad bridges. The Performance Chemicals segment develops, manufactures, and markets water-based wood preservatives and wood specialty additives, including micronized copper quaternary and micronized copper azole, micronized pigments, alkaline copper quaternary, amine copper azole, and chromated copper arsenate for decking, fencing, utility poles, construction lumber and timbers, and vineyard stakes. The CMC segment manufactures creosote for use in the treatment of wood or as a feedst...
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