| Powered Now | |
| Powergate Solutions Ltd | Greater London |
| PowerMapper Software | Edinburgh |
| PowerMarket | |
| PowerPlug | Northamptonshire |
| PowerScribe Internet Solutions Ltd | |
| Powersoft Computer Services Ltd | |
| Powersolve Electronics Ltd | Kent |
| Powervault | |
| Powr of You Ltd | |
| Powwownow | Greater London |
| Poynter Professional Services | |
| PPA Training | Surrey |
| PPC Junkies | Berkshire |
| PPC Rescue | |
| PPM Software Ltd | Essex |
| PPRO | Greater London |
| PQShield Ltd | |
| PR Fire | |
| PR Web Design | |
| Prabisha Consulting Ltd | |
| Practical Control Ltd | |
| Practical scriptwriter | Cardiff |
| Practical Software Design | Cardiff |
| Practice-IT Online Training | Kent |
| PractiveWeb | |
| Pragmatech | |
| Pragmatic | |
| PragmatIC Semiconductor | |
| Prater Raines Ltd | Kent |
| Praxis High | Shropshire |
| Preact Ltd | Berkshire |
| Precedence Technologies Ltd | Cambridgeshire |
| Precision Impulse | |
| Precision Medicine Scotland Innovation Centre | Glasgow |
| Precision Proco Group Ltd | |
| Precision Technologies | |
| PrecisionLife | |
| Precode | |
| Precursive | |
| Predicomm Ltd | |
| PredictImmune Ltd | |
| Predina Tech | |
| Preferred Computers & Networks Ltd | Cheshire |
| Prefix | Wiltshire |
| Premier Cables Ltd | Bedfordshire |
| Premier Cash Registers Ltd | Surrey |
| Premier Digital | |
| Premier Software Solutions | Staffordshire |
| Premier Solutions | Devon |