Energy, chemical industry and information and communication are two pillar industries of SK Group. In the field of energy, SK is the largest comprehensive energy and chemical enterprise in Korea. Ulsan Refinery is one of the largest single refineries in the same industry in the world, which can produce 42 million tons of crude oil every year.

SK has excellent management skills in energy conservation, environmental protection and operation, and has been rated as the most efficient enterprise in the global petrochemical industry by Solomon, the authoritative evaluation agency of the world refining industry.

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SK is also a leader in the telecommunications industry. 1996, SK successfully realized the commercialization of CDMA for the first time in the world, and achieved the success of promoting 2.5 generation CDMA 2000 1X service, 3 generation synchronous mode IMT-2000 and other mobile communications for the first time in the world. SK Telecom has a lot of mature application experience and technology in the third generation communication technologies CDMA 2000 and WCDMA.

In 20 19, it was selected as "Top 20 19 Forbes Global 100 Digital Economy", ranking 60th.

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