| S.E. Hovedgaard A/S | 8732 | Hovedgård |
| SafeExIT A/S | 2600 | Glostrup |
| SAMSON REGULERINGSTEKNIK A/S | 3460 | Birkerød |
| Scan Bejds Steel A/S | 6000 | Kolding |
| Scan-Tech ApS | 8660 | Skanderborg |
| Scanico A/S | 9210 | Aalborg SØ |
| Scanion ApS | 5540 | Ullerslev |
| Scanpackaging A/S | 7160 | Tørring |
| Scanvaegt Systems A/S | 8200 | Aarhus N |
| Schmersal Danmark A/S | 2650 | Hvidovre |
| Schneider Electric Danmark A/S | 2750 | Ballerup |
| Schur International a/s | 8700 | Horsens |
| Sealing System A/S | 7200 | Grindsted |
| Selmatec A/S | 3540 | Lynge |
| Semi-Stål A/S | 3000 | Helsingør |
| Senius Equipment ApS | 8830 | Tjele |
| SICK A/S | 3500 | Værløse |
| Siemens A/S | 2750 | Ballerup |
| Sika Footwear A/S | 7400 | Herning |
| SILCOFA ApS | 2650 | Hvidovre |
| Silhorko-Eurowater A/S | 8660 | Skanderborg |
| Siltec A/S | 8600 | Silkeborg |
| Skarby Rustfri Montage ApS | 2630 | Taarstrup |
| Skelmose ApS | 6740 | Bramming |
| Smart Automation ApS | 9490 | Pandrup |
| SMC Danmark A/S | 8700 | Horsens |
| SMVdanmark | 2300 | København S |
| SNA EUROPE (DENMARK) A/S | 2605 | Brøndby |
| SOCO SYSTEM A/S | 2630 | Taastrup |
| Solina Denmark | 8660 | Skanderborg |
| Solutionweb ApS - |Apps|Tracking|Web Kodning| | 2820 | Gentofte |
| SorptionShade A/S | 2610 | Rødovre |
| SP Technologies ApS | 7000 | Fredericia |
| Spirax Sarco Ltd. | 3460 | Birkerød |
| SSH Stainless a.s | 5700 | Svendborg |
| STEFFCA A/S | 5800 | Nyborg |
| STOK Emballage K/S | 5550 | Langeskov |
| Sulzer Pumps Denmark A/S | 3450 | Farum |
| Summit Electronics ApS | 2650 | Hvidovre |
| Sundolitt A/S | 7190 | Billund |
| Supravis Nordic ApS | 8700 | Horsens |
| Sydkystens Kransevice ApS | 2670 | Greve |
| SynFlex A/S | 3500 | Værløse |
| System Cleaners A/S | 9200 | Aalborg SV |