SOK is made up of about 35 independent regional cooperative societies that produce the group's services. Food and grocery account for half of SOK's overall business its market brands include ABC!, Alepa, Prisma, S Market, and Sale. The group was founded in 1904.Suomen Osuuskauppojen Keskuskunta (SOK Corporation) knows a thing or two (or 1,500) about retail. The Finnish group is active in grocery, combination convenience store/gas station, department store, specialty goods, hotel and restaurant, auto trade, and hardware services via 1,590 locations in its home country, throughout the Baltic nations, and Russia.