Holdings •
SK Inc. () is a
holding company which resulted when SK Corporation was reorganized on July 1, 2007, into a holding company and operating company, SK Inc. and SK Energy, respectively. SK Inc. is a part of the SK Group that focuses on 4 core business interests, High-tech materials, Bio, Green and Digital. The SK Group is composed of 186 affiliate companies that share the SK brand and culture. In 2021, SK Group recorded combined revenues of $133 billion, with exports contributing $50 billion of that total. SK continues to expand its global presence, with more than 117,590 employees who work from 473 offices worldwide. •
SK Square () is an investment-focused
holding company that manages an investment portfolio. It is the parent company of
SK hynix and holds an approximately 20.1% equity stake in the company. SK Square is a key entity within the SK Group for group-level control and capital allocation, and operates as a buy-side investment platform with characteristics comparable to
private equity and
venture capital. The company conducts cross-border investments through TGC (Technology Growth Collaboration) Square, a
Singapore-based overseas investment entity wholly owned by SK Square. TGC Square focuses on identifying and investing early in promising
AI and
semiconductor-related companies in the
United States and
Japan. In Japan, investment activities have been described as being led by the SK Japan organization based in
Tokyo Midtown, with portfolio companies generally targeting
IPOs over the following years, and with some reportedly progressing to subsequent funding rounds.
Energy and chemicals •
SK Innovation () is a South Korean enterprise formed as part of the July 1, 2007 reorganization of SK Corporation into a holding company and operating company, SK Inc. and SK Energy, respectively. In 2011, the petroleum business was spun off to become SK Energy. Simultaneously the chemical business was spun off to become SK Innovation. SK Energy was founded in 1962 as Korea's first oil refinery. In 1982, changed company name to
Yukong. SK Energy is an energy and petrochemical company with 5,000 employees, KRW 23.65 trillion in sales and 26 offices spanning the globe. The company is Korea's largest (and Asia's fourth largest) refiner with a refining capacity of 1.15 million barrels per day, as of 2006. SK Energy is engaged in exploration and development activities in 26 oil / gas blocks in 14 nations worldwide. •
SKC (), headquartered in
Seoul, is the leading Korean company in chemical and film industry. SKC was founded and established in 1976 as previous name of Sunkyong Chemicals Ltd (). SKC developed polyester films firstly in Korea, by its own efforts. With its main plant and R&D center located in
Suwon,
South Korea, it also operates large capacity of film plant in
Covington, Georgia, United States. SKC is engaged in chemicals, films, and solar. Including all subsidiaries, the company reported revenue of KRW2.7 trillion and operating profit of KRW190 billion in 2021. Its debt-to-equity ratio was 138% as of 3Q15. As one of the few conglomerates in Korea that focuses on chemical/material/component manufacturing and R&D, it has a long history among SK Group companies. In the past, the company produced videos, floppy disks, CDs, etc. but is now mainly engaged in B2B business such as chemical solutions, industrial films, and new materials. It is often confused with SK chemicals, but they are not the same company. •
SK Innovation E&S: A comprehensive energy company. Its businesses include city gas, LNG, and renewable energy. It holds 22 per cent of the domestic city gas market. Recently, it has entered the hydrogen energy business.
Information and communications technology •
SK Telecom () is Korea's No. 1 mobile phone company and the parent company of the SK Group ICT Family, a group of telecoms and semiconductor companies. As of the third quarter of 2024,
SK Telecom recorded sales of KRW 4.532 trillion, operating profit of KRW 533.3 billion, and net profit of KRW 280.2 billion. Its debt-to-equity ratio is just 134 per cent. •
SK Broadband: SK Broadband is responsible for wired and wireless internet communications, IPTV, telephony, IDC, and network solution products. •
SK Inc. C&C was established in 1991 and is currently one of the "Big Three" IT services companies in Korea. SK C&C has business interests across IT services, including telecommunications, banking & finance, government, public, logistics, and other fields. •
SK Communications: The company that operates Nate.
Semiconductor and materials •
SK Hynix () is the world's 3rd-largest semiconductor manufacturer and the 2nd-largest in South Korea after
Samsung Electronics which is the leader in the global
semiconductor industry. SK Hynix was founded in 1983 as "Hyundai Electronics", which is the origin of its name "Hynix", and merged to SK Group in 2012 when SK Telecom became the major shareholder. The major products are
DRAM,
flash memory, and many other semiconductor materials. While its headquarter is located at
Icheon,
Gyeonggido, it also runs a large production line at
Cheongju,
North Chungcheong Province. •
SK Siltron is the only semiconductor wafer manufacturer in Korea, and it has grown hand in hand with the semiconductor industry over the last 35 plus years. Armed with a record-long history of mass production and accumulated know-how, the company expands its production capacity in a preemptive manner and continues to strengthen its manufacturing and technology competitiveness. At the same time, the company is expanding its business portfolio to include emerging areas such as SiC wafers. This lays a strong foundation for SK Siltron to grow to become one of the world’s best semiconductor materials players both in production volume and profitability.
Logistics, services and bio •
SK Biopharmaceuticals () is a
drug discovery and
drug development company. It discovered
solriamfetol. •
SK Ecoplant is a Korean
construction company founded and established in 1977 with a previous name of
Sunkyong Construction (), headquartered in
Gwanhun-dong Jongno-gu, Seoul. Its brands include SK View, SK Hub, and Apelbaum. The company's CEO is Ki Haeng Cho. Industries: Oil & Gas, Petrochemical, Power, Environmental Protection, Industrial, Civil, Building, Housing. Services:Feasibility Study, EPC Service, Project Management, Operations & Maintenance. •
SK networks: A conglomerate that operates a variety of businesses, including trading, information and communication, energy distribution, consumer goods, and car rental. •
SK Oceanplant: It is a subsidiary of SK Innovation, which produces offshore wind farms and ship parts. •
SK pharmteco is a global contract development and manufacturing organization specializing in the production of active pharmaceutical ingredients (APIs), intermediates and viral vectors for cell and gene therapy for the pharmaceutical industry. SK Pharmteco operates six facilities in Europe, North America and Korea. == Management system ==