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| TREHUSPARTNER AS | 868236612 | GOL |
| TRE I BYGG AS | 860147572 | NORDRE FOLLO |
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| TREKON AS | 833799282 | NÆRØYSUND |
| TRE OG BETONG AS | 836839552 | RANA |
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| TRE TOMMER AS | 925047589 | INDRE ØSTFOLD |
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| TRIBO AS | 948651262 | BÆRUM |
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| TRINN FOR TRINN ENTREPRENØR AS | 918524843 | DRAMMEN |
| TRIO BETONG AS | 922689830 | LIER |
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