 | SIMEX RØR AS | 917718393 | STAVANGER |
| SIMM AS | 987872756 | BERGEN |
| SIMONA STADPIPE AS | 981928652 | STAD |
| SIMONSEN MASKIN AS | 960292154 | BODØ |
| SIMTEK VVS LTD NUF | 991400168 | OSLO |
| SIMUNDSET & GROEGGEN DRIFT AS | 931676059 | ORKLAND |
| SINDRE MYHRSVEEN HOLDING AS | 820641752 | RINGEBU |
| SINDSEN MASKIN AS | 913673611 | HOLMESTRAND |
| SINGH RØR AS | 925946877 | LILLESTRØM |
| SINUS AS | 984548621 | ALSTAHAUG |
| SINUS BODØ AS | 983156207 | BODØ |
| SINUS BRØNNØYSUND AS | 953343339 | BRØNNØY |
| SINUS ELEKTRO AS | 989059335 | SANDNES |
| SINUS MOSJØEN AS | 996301559 | VEFSN |
| SIO RØR AS | 922053278 | KRAGERØ |
| SIQVELAND & TØNNESSEN AS | 913727304 | TIME |
| SIRDAL BYGG AS | 981906136 | SIRDAL |
| SIRDAL HANDLAFT AS | 877545512 | SIRDAL |
| SIRDAL HYTTER OG HUS AS | 984669712 | SIRDAL |
| SISTE SPIKER AS | 918052739 | VENNESLA |
| SITE SERVICE AS | 996427544 | NITTEDAL |
| SITE SERVICE BANE AS | 925622516 | MOSS |
| SITHA VVS TEAM AS | 991354743 | BERGEN |
| SIV ARK TANJA VARDUND AS | 912570223 | OSLO |
| SIVERT MONTASJE AS | 930047066 | SKIEN |
| SIVILARKITEKT BENTE KRONEN | 930724297 | LARVIK |
| SIVILARKITEKT CAMILLA KOLBENSTVEDT | 981470400 | OSLO |
| SIVILARKITEKT MNAL LEIF LARSEN AS | 979962274 | SANDNES |
| SIVILARKITEKT MNAL OLE JOHAN DOLVA | 929955323 | KRISTIANSAND |
| SIVILARKITEKT NINA STOKSET NILSEN | 970146342 | KRISTIANSAND |
| SIVILARKITEKT TONE LIEN | 992548436 | OSLO |
| SIVILARKITEKT TORDIS HOEM AS | 976501187 | OSLO |
| SIVILING ANDERS BALSTAD AS | 916175205 | BÆRUM |
| SIVILINGENIØR ALBERT ØLNES AS | 989267485 | NESODDEN |
| SIVILINGENIØR ALEKSIC | 929931777 | OSLO |
| SIVILINGENIØR BJARTE FYLLINGEN AS | 935600189 | BERGEN |
| SIVILINGENIØRENE HAUG OG BLOM-BAKKE AS | 943276390 | OSLO |
| SIVILINGENIØR GIERT AASHEIM AS | 921076762 | BÆRUM |
| SIVILINGENIØR GODHAVN AS | 839696272 | TRONDHEIM |
| SIVILINGENIØR JOHAN TJÅLAND AS | 930736023 | HÅ |
| SIVIL INGENIØR MARIUS BAKKEN AS | 928557456 | HAMAR |
| SIVILINGENIØR OLE HAMMARI AS | 811780332 | ALTA |
| SIVILINGENIØR PETTER KLOSTER AS | 987581514 | BERGEN |
| SIVILINGENIØR SV BOLKESJØ ANS | 847696222 | OSLO |
| SIVILINGENIØR SVERRE STEEN AS | 968662635 | FREDRIKSTAD |
| SIVILINGENIØR TROND AMUNDSEN | 882022242 | TRONDHEIM |
| SIVILINGENIØR VANG AS | 999268145 | HARSTAD |
| SIVILINGENIØR WILL ARENTZ AS | 985060851 | DRAMMEN |
| SIV.ING ARNE HAUGE AS | 924387882 | OSLO |
| SIV ING ARNE SANDE | 984755775 | OSLO |