| Parker Hannifin Danmark, Filial af Parker Hannifin | 2750 | Ballerup |
| Pettinaroli A/S | 5500 | Middelfart |
| PG Flowteknik Scandinavia ApS | 2690 | Karlslunde |
| Phoenix Contact A/S | 2650 | Hvidovre |
| Pilz Skandinavien K/S | 6400 | Sønderborg |
| PlanEnergi | 9520 | Skørping |
| PM Energi A/S | 9700 | Brønderslev |
| PMC Hydraulics A/S | 2750 | Ballerup |
| Power Technic ApS | 3600 | Frederikssund |
| Pro-Plast Energeo | 8920 | Randers NV |
| Process Engineering A/S | 7000 | Fredericia |
| ProMetal A/S | 5500 | Middelfart |
| PRO|VENTILATION | 2610 | Rødovre |
| Prysmian Denmark | 2620 | Albertslund |
| Præstmark A/S | 2950 | Vedbæk |
| PUMPEGRUPPEN A/S | 2800 | Kongens Lyngby |
| PumPac A/S | 3400 | Hillerød |