Bedrift T - Gamle Fredrikstad
- Takstkompaniet AS
- Teistung AS
- Trucktech AS
- Tryggflytting
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- Tecotat
- Tecotat
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- Trivselsgruppe Nst
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- Transportsentralen, Fredrikstad Transportforum A/S
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- Tor Erik Lund AS
- Tyrolit AS - Bygg og anleggsavdeling
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- The Cobbling Stones Ungdomsbedrift
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- Tor-Erik Lund Invest AS
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- Tæsselædden Håndverk & Systue Ann Elisabeth Refsahl