| S. H. Værktøjsmaskiner ApS | 9490 | Pandrup |
| Safe Vent | 9800 | Hjørring |
| Saint-Gobain Abrasives A/S | 2630 | Taastrup |
| Sancon | 9550 | Mariager |
| Sanderum Smede- og Maskinværksted A/S | 5250 | Odense SV |
| Sandfeld A/S | 7400 | Herning |
| Sandvik Coromant A/S | 2620 | Albertslund |
| SAWO A/S | 9530 | Støvring |
| Sax Lift A/S | 6600 | Vejen |
| Scan Bejds Steel A/S | 6000 | Kolding |
| Scan-Tech ApS | 8660 | Skanderborg |
| Scanboiler Varmeteknik | 8600 | Silkeborg |
| Scancomposit A/S | 8940 | Randers SV |
| Scandiloc A/S | 4681 | Herfølge |
| SCANGRIP A/S | 5700 | Svendborg |
| Scanion ApS | 5540 | Ullerslev |
| Scanotech ApS | 4681 | Herfølge |
| Scantool Group | 9460 | Brovst |
| Schmersal Danmark A/S | 2650 | Hvidovre |
| Schneider Electric Danmark A/S | 2750 | Ballerup |
| Schnoor Plast ApS | 9500 | Hobro |
| Schunk Intec A/S | 5230 | Odense M |
| Sealing System A/S | 7200 | Grindsted |
| Seco Tools A/S | 2605 | Brøndby |
| Sejma Industries ApS | 8620 | Kjellerup |
| SELEKTRO A/S | 9632 | Møldrup |
| Selmatec A/S | 3540 | Lynge |
| Sertech | 8763 | Rask Mølle |
| SEW-EURODRIVE A/S | 2670 | Greve |
| Si-Lak Svendborg A/S | 5700 | Svendborg |
| Sicatech A/S | 7600 | Struer |
| SICK A/S | 3500 | Værløse |
| Silhorko-Eurowater A/S | 8660 | Skanderborg |
| Siltec A/S | 8600 | Silkeborg |
| Sjørring | 7700 | Thisted |
| SK Svejsemateriel ApS | 2630 | Taastrup |
| Skaks A/S | 6230 | Rødekro |
| Skanda A/S | 9550 | Mariager |
| Skandia Laser Teknik A/S | 8362 | Hørning |
| Skanroll A/S | 8620 | Kjellerup |
| Skarby Rustfri Montage ApS | 2630 | Taarstrup |
| Skelmose ApS | 6740 | Bramming |
| Smart Automation ApS | 9490 | Pandrup |
| SMC Danmark A/S | 8700 | Horsens |
| Smel Industry ApS | 5854 | Gislev |
| SMVdanmark | 2300 | København S |
| SNA EUROPE (DENMARK) A/S | 2605 | Brøndby |
| SOCO SYSTEM A/S | 2630 | Taastrup |
| Soft & Teknik A/S | 9900 | Frederikshavn |
| Solectro AB | 234 35 | Lomma |
| Sonnimax A/S | 5500 | Middelfart |
| SP Industry | 6500 | Vojens |
| SP Technologies ApS | 7000 | Fredericia |
| Spaantec ApS | 5750 | Ringe |
| Spånligaen | 7400 | Herning |
| SSAB Svensk Stål A/S | 2605 | Brøndby |
| SSH Stainless a.s | 5700 | Svendborg |
| StaalService A/S | 7300 | Jelling |
| Stahlwille Nordic A/S Tools & Technical Solutions | 2635 | Ishøj |
| Stålrør AS | 2765 | Smørum |
| Stålspecialisten ApS | 6818 | Årre |
| Standesign A/S | 5800 | Nyborg |
| Stansomatic A/S | 7190 | Billund |
| Steeltec A/S | 9400 | Nørresundby |
| STEFFCA A/S | 5800 | Nyborg |
| Stenca Solutions ApS | 9220 | Aalborg Ø |
| Stenhøj Hydraulik A/S | 7150 | Barrit |
| Stennevad | 6715 | Esbjerg N |
| Sterke A/S | 9220 | Aalborg Øst |
| Stiholt A/S | 9300 | Sæby |
| Strenometer ApS | 2830 | Virum |
| Sulzer Pumps Denmark A/S | 3450 | Farum |
| Summit Electronics ApS | 2650 | Hvidovre |
| Sur-Tech A/S | 3520 | Farum |
| SurfCoat A/S | 3520 | Farum |
| Svejbæk Fræseværk ApS | 8732 | Hovedgård |
| Svejsehuset A/S | 8260 | Viby J |
| Sverdrup Steel AS | 4032 | Stavanger |
| Sydjyllands Vægtfabrik | 6000 | Kolding |
| Sydkystens Kransevice ApS | 2670 | Greve |
| SynFlex A/S | 3500 | Værløse |
| Søren Nielsens Diamantpolering ApS | 5900 | Rudkøbing |
| Sørensen & Kofoed A/S | 2730 | Herlev |
| Svend Frederiksen Maskinfabrik A/S | 5750 | Ringe |