The group is chaired by Chey Tae-won, son of founder Chey John-hyun. SK began life as a textile spinning company before branching out into such diverse fields as oil refining and communications. SK Telecom is South Korea's largest mobile carrier, while SK Hynix is one of the world's leading producers of memory chips.
Major listed companies
Market capitalization (in million dollars)
Busan City Gas
As of Nov. 25
Source: QUICK-FactSet, Nikkei Asian Review