SK Inc., together with its subsidiaries, engages in petroleum refining, telecommunications, wholesale and retail, chemicals, construction, and other businesses in Korea. The company is also involved in city gas and power generation, services, manufacturing, trading, insurance, LNG, new regeneration, electricity and other electric wire installation, hydrogen, international call and MVNO, resale and other resale communication, call center and telemarketing, and ecommerce businesses. In addition, it engages in crude oil refining and sales; operation of gas station; sports association sponsoring; sale of asphalt; manufacturing and sale of chemicals, petrochemicals, lubricant oil, separators for secondary batteries, lithium battery, storage battery, and industrial gas; operates in information and communication, transportation, and warehousing industries; lithium cell certification; exploration and injection of carbon dioxide storage; issuance and redemption of floating securities; carbon collection and storage-related investment projects; and investment activities. Further, the company provides management consulting and information gathering, battery reuse/recycle, oil development, energy, resource development, software development, mobile telecommunications, wire communications, information and communication facilities management, databases and online information, maintenance management, internet portal, research and development, publication and telemarketing, and telecommunication services. Additionally, it is involved in the provision of energy solutions; broadcasting program production; non-memory and other electronic; manufacturing of integrated circuit, and video and audio equipment; and manufacturing, sale, and rent of household appliances. The company was formerly known as SK Holdings Co., Ltd and changed its name to SK Inc. in March 2021. SK Inc. was founded in 1991 and is headquartered in Seoul, South Korea.