Firma U - Sand
- Underbakke AS
- Utdanningsforbundet Suldal
- Underbakke 2 AS
- Underbakke 4 AS
- Underbakke Eigedom AS
- Underbakke 5 AS
- Underbakke Sjøhus AS
- Underbakke Kjevik AS
- Underbakke 8 AS
- Underbakke 7 AS
- Underbakke 3 AS
- Underbakke Helikopter AS
- Underbakke Luftfart AS
- Utdanningsforbundet Suldal
- Underbakke Holding AS
- Underbakke handel AS
- Underbakke GC AS
- Underbakke taxi
- Underbakke Drift AS
- Underbakke Helikopter 2 AS
- Utdanningslegat i Suldal kommune