Firma U - Hokksund
- Ullern AS
- Unigrav AS
- Ullern Holding AS
- Utengen Hans
- Unicare Hokksund AS
- Utrustningssenteret 247
- Uggla Holding AS
- Uno-X Hokksund
- Uno-X Frognes
- Utdanningsforbundet Øvre Eiker
- Union renhold AS Konkursbo
- Union renhold AS Konkursbo
- Universal group Ali
- Ullnorge Bartosz Piotr Marciniak
- Urmaker Bjørn Arne S Nordahl