SK Inc. (Korean: 에스케이 주식회사) is a holding and IT services company headquartered in Seoul, South Korea. The company is divided into Investment Division and Business Division. The Investment Division operates as a holding company engaged in petroleum, telecommunications, wholesale and retail, chemicals, semiconductors, biotechnology, and other industries. It holds the SK Group's major subsidiaries, including SK Innovation, SK Telecom, SKC, SK Networks, SK Materials, and SK Biopharmaceutical. The Business Division, SK Inc. C&C, provides system integration, software design and development, information processing, and consulting services