| S.H. Værktøjsmaskiner | 1167 | Oslo |
| Saghuset Hesselberg AS | 1339 | VØYENENGA |
| Sandvik Coromant | 7010 | Trondheim |
| Scanco AS | 5132 | Nyborg |
| Schmersal Norge | 3036 | Drammen |
| Schneider Electric Danmark A/S | 2750 | Ballerup |
| Schneider Electric Norge AS | 0607 | Oslo |
| Seal Weld Pro AS | 4313 | Sandnes |
| Sealteam AS | 2056 | Algarheim |
| Sertech Norway | 8763 | Rask Mølle |
| Servi AS | 1423 | SKI |
| SEW-EURODRIVE AS | 1599 | MOSS |
| SMC Automation AS | 1366 | Lysaker |
| SNA Europe (Norway) AS | 1351 | Rud |
| Sohome AS | 5252 | Søreidgrend |
| Solectro AB | 234 35 | LOMMA |
| Spirax Sarco AS | 2019 | Skedsmokorset |
| SSAB EMEA AB | 51-116 | Poland |
| SSAB Svensk Stål AS | 0283 | Oslo |
| Stafa Industrier AS | 4879 | Grimstad |
| Stahlwille Nordic A/S | 2635 | Ishøj |
| Stansefabrikken Solutions AS | 1722 | GRÅLUM |
| Steinsvik Production AS | 5563 | FØRRESFJORDEN |
| Stenhøj Hydraulik A/S | 7150 | Barrit |
| Stryvo | 6783 | Stryn |
| Svea Maskiner AS | 3036 | Drammen |
| Sverdrup Steel | 4032 | Stavanger |