 | SERVICE OG VEDLIKEHOLD AS | 994297147 | GJØVIK |
| SERVICERØRLEGGER JAN AS | 931316508 | BJØRNAFJORDEN |
| SERWENT TT-TEKNIKK AS | 940484871 | LILLESTRØM |
| SES ELEKTRO AS | 925834157 | SOLA |
| SET ELEKTRO AS | 987818549 | TØNSBERG |
| SETER GRAVING OG UTEMILJØ AS | 924763345 | RÅDE |
| SETRA DRIFT AS | 919885130 | SURNADAL |
| SETTEVIK ASFALT AS | 983347584 | BÆRUM |
| S FARMENS MESTERBYGG AS | 946874221 | HAMAR |
| SF BYGG AS | 994235672 | VESTVÅGØY |
| SFK GRAVING AS | 993539155 | RINGSAKER |
| S. FLATNES ENTREPRENØR AS | 929031369 | SVEIO |
| SFP KLIMA AS | 996306623 | HÅ |
| SGM BYGG AS | 930751677 | MOSS |
| SG SERVICE AS | 933743373 | VESTRE TOTEN |
| SG VVS AS | 934269705 | VESTBY |
| SH-BYGG AS | 992764619 | OSLO |
| SH - ELEKTRO AS | 994038370 | LILLESAND |
| SHEPPARD BYGG AS | 924699809 | VENNESLA |
| SHF BYGG AS | 915279090 | KARMØY |
| SH-MASKIN AS | 916732023 | ØKSNES |
| SH OPPMÅLING AS | 913864344 | MASFJORDEN |
| SH PROSJEKT AS | 998850606 | INDRE ØSTFOLD |
| SIA GOKSTAD HUS NUF | 912550680 | |
| SIAS AS | 976879406 | TØNSBERG |
| SIDDIS BYGG AS | 923206841 | STAVANGER |
| SIEKACZ VAKTMESTER SERVICE AS | 998638437 | LARVIK |
| SIEMENS AS | 923009108 | OSLO |
| SI ENTREPRENØR AS | 827610372 | OSLO |
| SIERO AS | 922168245 | TRONDHEIM |
| SIFAB BYGG AS | 921413734 | SANDNES |
| SIGBJØRN VIK & SON AS | 933757242 | VOSS |
| SIGDAL ANLEGGSSERVICE AS | 920776396 | SIGDAL |
| SIGFRED BENTZEN & SØNN AS | 910462105 | OSLO |
| SIG HALVORSEN AS | 976700376 | SANDNES |
| SIGMA RØR AS | 934845870 | SANDEFJORD |
| SIGMUND HVILA AS | 980669599 | SIGDAL |
| SIGMUND LOTHE AS | 939507213 | SOLA |
| SIGNAL BYGG AS | 927519720 | SARPSBORG |
| SIGN AS | 977227984 | NAMSOS |
| SIGN CONSULT NORWAY AS | 966597879 | ULLENSAKER |
| SIGNUM AS | 923531777 | BÆRUM |
| SIGSO BYGG AS | 927018853 | HUSTADVIKA |
| SIGURD FOSSLI AS | 911791595 | ASKER |
| SIGURD FURULUND MASKIN AS | 976950275 | ULLENSAKER |
| SIGURD OG OLA GRIMSTAD AS | 971587229 | GAUSDAL |
| SIGURD OPHEIM AS | 884492122 | BERGEN |
| SIGVARTSEN ANLEGGSSERVICE AS | 935938902 | NORD-ODAL |
| SIGVE HAMRE MASKIN AS | 931453734 | SANDNES |
| SIKVELAND STÅLE NOROLV | 970311157 | TIME |
| SILJAN BYGG AS | 828490192 | OSLO |
| SILJUBERGSÅSEN HÅNDVERKSTJENESTER | 928848094 | ELVERUM |
| SILKOSET BYGG AS | 983928447 | ELVERUM |
| SIMBRA RÅDGIVNING AS | 922618585 | HAMAR |
| SIMEN HØGSTAD MASKINENTREPRENØR AS | 922796459 | MIDT-TELEMARK |
| SIMEN KVISSEL ENTREPRENØR | 997248430 | ELVERUM |
| SIMEX ELEKTRO AS | 917356181 | STAVANGER |
| SIMEX RØR AS | 917718393 | STAVANGER |
| SIMM AS | 987872756 | BERGEN |
| SIMONA STADPIPE AS | 981928652 | STAD |
| SIMONSEN MASKIN AS | 960292154 | BODØ |
| 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 |
| SIO RØR AS | 922053278 | KRAGERØ |
| SIQVELAND & TØNNESSEN AS | 913727304 | HÅ |
| SIRDAL BYGG AS | 981906136 | SIRDAL |
| SIRDAL HANDLAFT AS | 877545512 | SIRDAL |
| SISTE SPIKER AS | 918052739 | VENNESLA |
| SITE SERVICE AS | 996427544 | NITTEDAL |
| SITHA VVS TEAM AS | 991354743 | BERGEN |
| SIV BYGG AS | 833895052 | HOLMESTRAND |
| SIVERT MONTASJE AS | 930047066 | SKIEN |
| SIVILARKITEKT BENTE KRONEN | 930724297 | LARVIK |
| SIVILARKITEKT CAMILLA KOLBENSTVEDT | 981470400 | OSLO |
| SIVILARKITEKT MNAL LEIF LARSEN AS | 979962274 | SANDNES |
| SIVILARKITEKT NINA STOKSET NILSEN | 970146342 | KRISTIANSAND |
| SIVILARKITEKT TONE LIEN | 992548436 | 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 |
| SIVILINGENIØRENE STENSAKER AS | 982339022 | ASKER |
| 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 SHAKIBAI | 933923053 | DRAMMEN |
| 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 |