Bedrift O - Surnadal
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- Ola Sylte
- Orkdalsvegen 100 AS
- Otnes Properties AS
- Ola Halle
- Olav Heggset AS
- Ogos Holding AS
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- Ola Ranes
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- Ormsets Utmarkstjenester
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- Ola Møkkelgjerd
- Ole Anders Gravvold
- Olav Bjarte Sande
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- Ola Sylte Heggset
- Oljeservice Rune Mogstad
- Odd Magne Gulla
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- Os Lade alle 27 AS
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- Olaf Moen Eftf AS Intersport Surnadal