Bedrift T - Nordre Frogn
- Tresse
- Triangelos
- Triangelos
- Todoroki AS
- Tein AS
- Tor Thoresen
- Torill Weiskopf
- Td-Teknikk AS
- Tiurlia Båtforening
- Therese Busk
- Torbjørn Larsen
- Thoresen Gartneri
- Thoresen Gartneri
- Trude Eker
- T&T Invest AS
- Ted Andreassen
- Teigen Gjenvinning
- Tusse Eiendom AS
- Tusse Holding AS
- Tropex Norge
- T9 Energy AS
- Tropex Hagedam AS
- Trond Haug Holding AS
- Thoren Landskapsarkitekt Mnla
- To Skeive Trubadurer
- Trond Skurdal Dødsbo
- Tømrer Arturas Zidkich AS
- Thorvald Einar Dahl
- Terje Boye-Hansen
- Tømrer Pavel Nosek
- Thorleif Bernhard Dahl
- To Skeive Trubadurer
- Tom Christian Digerud Waagsaas