Firma U - Larvik
- Upside ANS
- Ukrainagruppa
- Ubiquitous AS
- Ulefossenteret AS
- Unsaco AS
- Ugelstad
- Ullinveien AS
- Utdanningsforbundet Larvik
- Ulf Kittelsen
- Ulåsen barnehage
- Ulåsen barnehage
- Utklev eiendom AS
- Uthavn Holding AS
- Ugle Holding AS
- Ugle eiendom AS
- UTD Reklameprodusenten
- Ulvær Fasadeservice
- Umicore Norway AS
- Ulefossveien 48 AS
- Ubm Emerald AS
- Utklev Gerd
- Utklev Sirikit
- Uta invest AS
- Uglum agentur
- Unicon Avd. Larvik
- Unicon AS avd Larvik
- Unni Sandmo fysioterapi
- Utgard Laiv forening
- Unicum Id-Brikker AS
- Universal Exports Vwp AS
- U9 design, Helle
- Univern Senter Larvik
- Uab Good house
- Unn Marion Hagen
- Utrykningspersonellets Fellesutvalg - Larvik
- Uno-X Hovland
- Ungt entreprenørskap Alumni Vestfold
- Up To Date - Larvik ANS
- UPS And Downs Vestfold
- Uzin Utz group Norge AS
- Utklev Hans Erling Veterinær
- Ugelstad Gjør En Gestus
- Ulleberg gård Marianne S Thorstensen
- Utrykningspersonellets Fellesutvalg - Norge (Uf-Norge)
- Us pizza - Atlantic eksport import Mohammad Hadavi