Resonac Holdings Corporation operates as a chemical company in Japan and internationally. It operates through the Semiconductor and Electronic Materials, Mobility, Innovation Enabling Materials, Chemicals, and Crasus Chemical segments. The company offers gases and solvents, abatement equipment systems and surface treatments, CMP slurries, and anti-charging materials; semiconductor-related materials, display and sensor-related materials, and films; base and photosensitive materials for PWBs; hard disks, SiCs, and optical semiconductors for use as electronic device components; and molded plastics/sheet-formed, powder metal, and aluminum products for automotives. It provides lithium-ion batteries and mechanical carbon; ceramics, resins, cosmetic ingredients, monomers, adhesives, tapes, and chromatography products; industrial gases, and elastomers. In addition, the company offers polyimides; HD media; friction materials; plastic molded; aluminum gravity casting products; packaging/containers; electrical insulating epoxy resin molded products; zipper bags and tapes; titanium oxide and alumina; and elastic polishing grindstone. Further, it provides petrochemical and organic chemicals; polypropylene and polyethylene; liquefied carbon dioxide, dry ice, and gas-related equipment; liquefied oxygen, nitrogen, and argon; molecular sieve; graphite electrodes; plasters, fireproofing pipes, and wall sidings; cement and moisture removal sheets; industrial materials; and FRP, coated sand, and separating mediums. Additionally, the company engages in leasing personnel computers and other business equipment; outsourcing of salary, welfare, and finance-related business; and synthesis, analysis, and SDS preparation services. The company was formerly known as Showa Denko K.K. and changed its name to Resonac Holdings Corporation in January 2023. The company was incorporated in 1939 and is headquartered in Tokyo, Japan.