Firma U - Mandal
- Urvikodden AS
- Ugle AS
- Ufredsundsholmen
- Ujuzi Vision AS
- Utdanningsforbundet Mandal
- Utdanningsforbundet Lindesnes
- Unicon avd. Mandal
- Ulf Henriksen
- Umoe Mandal AS
- Unicon Avd. Mandal
- Utdanningsforbundet Marnardal
- U9q Floors AS
- Uab Maling Erfaring NUF
- Umoe Mandal eiendom AS
- Umoe Advanced Composites AS
- Umoe Advanced Composites AS
- Underwater lighting solutions AS
- Uno-X Mandal
- Umami - Linda Merete Skaar
- Up Drone service Studentbedrift
- Unique import Maria T G Helgeland