Firma U - Frogner Oslo
- Uvital AS
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- Utleiemegleren AS
- Uncu
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- Ung Dialog
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- Ungarns ambassade
- Unsgård Holding AS
- Ulf Prytz
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- Utopia Workshop AS
- Uranienborg Rotaryklubb
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- Unique beauty AS
- Ulrik Rolfsen
- Urge.no
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- Ullevålsveien 37 AS
- Utleiemegleren Frogner
- Unni Gulliksen
- Ullevålsveien 81a AS
- Uranienborg Majorstuen Historielag
- Upnorth film Oslo AS
- Uno Alexander Vesje
- Unimpex Olga Ruud
- Uno Dos entertainment AS
- Unit One eiendom AS
- Ulrik Ibsen Thorsrud
- Ummuhan Ezra mat
- Upnorth Productions Martin Bjercke
- Unum beauty And Lifestyle
- Underenhet Sameiet Frognerveien 31
- Uventa Kreativitet Andreas Reutz
- Uranienborg Skoles 17. Mai komite
- Union Des Congolais En Norvege
- Utopia Retro Modern Fabio Carlesi
- Urbanyoga.no Holly Olivia Brown
- Ulla-Karin Engstrøm spesialist i Periodonti