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| STYRVOLL VVS Lars J Hellenes | 986076336 | LARVIK |
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| SULKOWSKI RØR | 927853116 | SULA |
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| SUNDBY 'S RØRLEGGERBEDRIFT | 931443429 | BARDU |
| SUNDE HAGESERVICE AS | 938017549 | SOLA |
| SUNDET TRANSPORT & GRAVING AS | 892598762 | LARVIK |
| SUNDSHAMMARN AS | 997113454 | BØ (NORDLAND) |
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| SUNNFJORD INGENIØRTENESTE AS | 890279872 | SUNNFJORD |
| SUNNFJORD MASKIN AS | 992501693 | SUNNFJORD |
| SUNNFJORD RØR AS | 991639489 | SUNNFJORD |
| SUNNIVA AS | 976604598 | OSLO |
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| SUNNMØRE MASKIN AS | 958594615 | ØRSTA |
| SUNNMØRE VENTILASJON AS | 882932222 | HERØY (MØRE OG ROMSDAL) |
| SUNN RØR AS | 997441885 | FJORD |
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| SVAKSTRØM AS | 934237374 | STAVANGER |
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| SVARTANGEN MASKIN AS | 914841704 | SILJAN |
| SVARTISEN VVS AS | 912319334 | MELØY |
| SVEA ENTREPRENAD AS | 925885673 | OSLO |
| SVEBERG RØR AS | 919853409 | VERDAL |
| SVEBO ØYSTEIN BØHLER | 970291792 | OSLO |
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| SVEHAUG ENTREPRENØR AS | 994547054 | KARMØY |
| SVEIN ANDVIK AS | 935199050 | MASFJORDEN |
| SVEIN EIDE AUTORISERT RØRLEGGERMESTER AS | 965798250 | ØVRE EIKER |
| SVEINGARD MASKIN | 993509884 | HOL |
| SVEIN HAUG & SØNNER AS | 917602182 | ENEBAKK |
| SVEIN HØKSAAS AS | 990654441 | LINDESNES |
| SVEIN HOKSRUD | 932546922 | TJELDSUND |
| SVEIN LITLESKARE MASKINSTASJON AS | 998121663 | ALVER |
| SVEIN LØKEN EFTF AS | 923097945 | KONGSBERG |