Olin Corporation (NYSE: OLN) is a U.S.-based chemicals and manufacturing company headquartered in Clayton, Missouri. The company is a major North American producer of chlor‑alkali products and a global supplier of epoxy materials.
Its portfolio includes chlorine, caustic soda, hydrogen, hydrochloric acid, sodium hypochlorite, potassium hydroxide, and related chlorinated organics, as well as epichlorohydrin and a range of liquid and solid epoxy resins and curing agents. These products serve applications in water treatment, pulp and paper, construction, packaging, automotive, electronics, and other industrial markets. Olin also owns and operates the Winchester ammunition business as a separate segment.
Olin operates manufacturing facilities across North America, Europe, Asia, and Latin America, supplying customers through integrated production assets and logistics networks.