Koppers Holdings Inc. Stock: price and insider trades · United States · SEC (Form 4)

About Koppers Holdings Inc.

Koppers Holdings Inc. (ticker KOP) is a U.S.-listed industrial company traded on the NYSE/NASDAQ universe; in practice, its shares are listed on the NYSE. For French-speaking investors, Koppers is best understood as a specialty materials and intermediate chemicals business with meaningful exposure to infrastructure, rail, wood treatment, and selected industrial end markets. The company’s roots go back to the early 1900s, when German engineer Heinrich Koppers developed coke-oven technology designed to recover byproducts for reuse rather than release them into the atmosphere. Its headquarters are in Pittsburgh, Pennsylvania, United States. ([koppers.com](https://www.koppers.com/company?utm_source=openai)) Koppers’ business model is built around several complementary segments. On one side, Railroad and Utility Products and Services supplies treated railroad ties, utility-related infrastructure products, and maintenance-oriented services tied to rail and utility networks. On the other, Carbon Materials and Chemicals converts industrial byproducts into value-added inputs used in aluminum, steel, plastics, resins, rubber, and other manufacturing chains. This gives Koppers a niche industrial profile: it is not a broad commodity chemicals producer, but a technically specialized provider where process know-how, product stewardship, customer stickiness, and long-term supply relationships matter as much as headline scale. ([koppers.com](https://www.koppers.com/company/what-we-do?utm_source=openai)) From a competitive standpoint, Koppers benefits from global reach and from operating in segments that tend to have meaningful operational and regulatory barriers. The company emphasizes a diversified geographic footprint and a portfolio anchored in recurring infrastructure demand, allowing it to serve industrial and railroad customers across North America, Europe, Latin America, and other regions. Its differentiation comes from process expertise, byproduct valorization, and a sustainability-oriented operating model, all of which can help defend margins and customer relationships against more generalized competitors. ([koppers.com](https://www.koppers.com/company?utm_source=openai)) Recent developments include the release of the company’s 2024 annual report in March 2025 and its full-year 2025 results in early 2026. Those results highlighted changes in volumes and in certain chemical lines, including the discontinuation of phthalic anhydride production and lower revenues in some carbon and railroad maintenance activities. Koppers also continues to file Form 4 insider transaction disclosures, underscoring ongoing market attention to ownership activity and governance signals. ([investors.koppers.com](https://investors.koppers.com/news-releases/news-release-details/koppers-holdings-announces-availability-2024-annual-report?utm_source=openai))