| S.E. Hovedgaard A/S | 8732 | Hovedgård |
| SafeExIT A/S | 2600 | Glostrup |
| Saferoad Services A/S | 4600 | Køge |
| Saint-Gobain Abrasives A/S | 2630 | Taastrup |
| Saint-Gobain Denmark A/S, Isover | 6580 | Vamdrup |
| Saint-Gobain Ecophon A/S | 2650 | Hvidovre |
| Saltnex A/S | 8930 | Randers NØ |
| SAMSON REGULERINGSTEKNIK A/S | 3460 | Birkerød |
| Sanderum Smede- og Maskinværksted A/S | 5250 | Odense SV |
| Saniflow ApS | 4241 | Vemmelev |
| SAWO A/S | 9530 | Støvring |
| Scanboiler Varmeteknik | 8600 | Silkeborg |
| Scancomposit A/S | 8940 | Randers SV |
| Scandi Supply A/S | 5492 | Vissenbjerg |
| SCANGRIP A/S | 5700 | Svendborg |
| ScanPipe A/S | 5250 | Odense SV |
| Scantron A/S | 5000 | Odense C |
| Scantruck A/S | 7800 | Skive |
| Scanvogn | 9850 | Hirtshals |
| Schneider Electric Danmark A/S | 2750 | Ballerup |
| Sejlstrup Entreprenørforretning A/S | 9480 | Løkken |
| Sejma Industries ApS | 8620 | Kjellerup |
| Sesam Mobile Væg Systemer A/S | 2670 | Greve |
| SHT A/S | 7400 | Herning |
| SICK A/S | 3500 | Værløse |
| Siedle Nordic A/S | 2650 | Hvidovre |
| Signmax AB | 438 91 | Landvetter |
| Sika Footwear A/S | 7400 | Herning |
| Simonsen co | 8000 | Aarhus |
| Simotec A/S | 6240 | Løgumkloster |
| Simpson Strong-Tie A/S | 8300 | Odder |
| SITECH Danmark A/S | 8700 | Horsens |
| Skaks A/S | 6230 | Rødekro |
| Skandek Tagelement ApS | 8660 | Skanderborg |
| Skelmose ApS | 6740 | Bramming |
| Skou Gruppen A/S | 2970 | Hørsholm |
| Skybrudskompagniet ApS | 6700 | Esbjerg |
| Slejpner Maskiner A/S | 2820 | Gentofte |
| SmartGuard ApS | 3550 | Slangerup |
| SMVdanmark | 2300 | København S |
| SNA EUROPE (DENMARK) A/S | 2605 | Brøndby |
| Snedkernes Uddannelser | 2400 | København NV |
| Södra Wood A/S | 3400 | Hillerød |
| Softcontrol A/S | 9310 | Vodskov |
| Sonnimax A/S | 5500 | Middelfart |
| SorptionShade A/S | 2610 | Rødovre |
| Spangenberg & Madsen Rådgivende Ingeniørfirma A/S | 2620 | Albertslund |
| Spelsberg A/S | 5800 | Nyborg |
| Spirax Sarco Ltd. | 3460 | Birkerød |
| Spæncom A/S | 9200 | Aalborg SV |
| Stålspecialisten ApS | 6818 | Årre |
| Stenca Solutions ApS | 9220 | Aalborg Ø |
| Steni Danmark A/S | 2665 | Vallensbæk |
| Stennevad | 6715 | Esbjerg N |
| Stiholt A/S | 9300 | Sæby |
| Stonewalk as | 8740 | Brædstrup |
| Strenometer ApS | 2830 | Virum |
| Sulzer Pumps Denmark A/S | 3450 | Farum |
| Summit Electronics ApS | 2650 | Hvidovre |
| Sundolitt A/S | 7190 | Billund |
| Swedoor | 9670 | Løgstør |
| Swisspearl Danmark A/S | 9000 | Aalborg |
| Sydkystens Kransevice ApS | 2670 | Greve |
| Symetri A/S | 2300 | København S |
| Systemair A/S | 8361 | Hasselager |
| SYSTRA Danmark A/S | 2300 | København S |
| Søndergaard A/S | 3600 | Frederikssund |