| Phoenix Prime Care Limited | Rochester | 2025 |
| Phoenix Protect Limited | London | 2023 |
| Phoenix SEN Services Limited | Sawbridgeworth | 2024 |
| Phoenix-Kaw Care Consultancy Ltd | London | 2024 |
| Phoenix-Rwr Limited | Strathpeffer | 2019 |
| Phola International Ltd | Nottingham | 2018 |
| PHONES4LESS Limited | Blackburn | 2000 |
| Photo 51 CIC | London | 2025 |
| Phronesis Support Services Ltd | Scunthorpe | 2020 |
| Phuah Limited | London | 2017 |
| Physikul Limited | Birmingham | 2023 |
| Physio Medco Limited | Leeds | 2022 |
| Physio on Door Ltd | Rm81Yt | 2024 |
| Physio Tribe Ltd | London | 2025 |
| PI and ZU Limited | High Wycombe | 2024 |
| PIA Fire Safety Consultancy Ltd. | London | 2025 |
| Pifa CCA Limited | Coalville | 2006 |
| Pignolia Project Community Interest Company | London | 2026 |
| Pilar Ltd | Chesterfield | 2019 |
| Pilgrim Fire Protection Ltd | Boston | 2020 |
| Pillar (Fire Impact + Risk Engineering) Ltd | Glasgow | 2025 |
| Pimpilai Thai Massage Ltd | Gillingham | 2022 |
| Pine Health Care Services Limited | Stevenage | 2020 |
| Pineable Ltd | Dagenham | 2018 |
| Pink Hearts Care Services Ltd | Elm Grove Worthing | 2025 |
| Pinnacle Apex Limited | Colchester | 2023 |
| Pinnacle Fire Solutions Ltd | Chadwell Heath | 2025 |
| Pinnacle UK Consultants Ltd | Romford | 2020 |
| Pinpoint Passive Fire Protection Services Ltd | Maesteg | 2026 |
| Pioneer Fire Systems Limited | Brentwood | 2012 |
| Pioneer Passive Fire Protection Ltd | London | 2022 |
| Pioneering Care Bicester Limited | London | 2018 |
| PIR Consultants Ltd | Twickenham | 2021 |
| Piracha Services Ltd | Walsall | 2022 |
| Pitt Projects Limited | Plymouth | 2013 |
| Pivot Home Care Limited | Ilford | 2023 |
| Pivotal Defence Solutions Limited | Cardiff | 2012 |
| PJ Fire Protection Ltd | New Brighton | 2018 |
| PJC Firetecnic Limited | Dartford | 2025 |
| PJF Associates Limited | Grimsby | 2019 |
| PJJ Consultancy Limited | Coventry | 2016 |
| PJN Care Ltd | Chatham | 2019 |
| PJR Residential Consulting (CYP) Limited | Winsford | 2026 |
| Pjrenforce Ltd | London | 2025 |
| PK Fire Ltd. | Edinburgh | 2018 |
| Pkas Consulting Ltd | Dorking | 2011 |
| PKC: Peacekeeping Consultancy Limited | Petersfield | 2013 |
| PKM Safety Consultants Ltd | Mansfield | 2013 |
| PL Fire Security Ltd | Southampton | 2024 |
| Place Group Limited | Penzance | 2002 |
| Placenta Accreta UK CIC | Bradford On Avon | 2024 |
| Plan B Training Limited | Harrow | 2014 |
| Plan-It Perfect CIC | London | 2025 |
| Planet Edeniga Limited | Milton Keynes | 2022 |
| Planly AI Ltd | Bedford | 2025 |
| Planning and Law Limited | Fleetwood | 2006 |
| Plant & Marine Services Limited | Ilford | 2000 |
| Plax Healthcare Ltd | Leicester | 2019 |
| Play Together Limited | Croydon | 2012 |
| Playgroundvr Limited | Grays | 2024 |
| Pleroma Academy Limited | Cardiff | 2019 |
| Plexus Research & Consulting Limited | Brierley Hill | 2014 |
| Plinkfizz Holdings Limited | Stoke On Trent | 2012 |
| Plmqaz Ltd | Purfleet-On-Thames | 2025 |
| Plugshield Ltd | Liverpool | 2025 |
| Plunge Ltd | Northampton | 2012 |
| Plusk Ltd | Stoke-On-Trent | 2018 |
| Plymstock Safety Services Limited | Saltburn-By-The-Sea | 2014 |
| PM Healthcare Limited | Waterlooville | 2019 |
| PMC Fire Safety Ltd | London | 2022 |
| PMC Firefighter Training Ltd | Stratford-Upon-Avon | 2018 |
| PMD Fire Protection Limited | Chorley | 2020 |
| Pmdd Northwest CIC | Liverpool | 2026 |
| PMG Partners Ltd | London | 2020 |
| PML (UK) Limited | Lytham St. Annes | 2008 |
| PML Fire Protection Ltd | Little Shelford | 2025 |
| PMM Consultants Limited | Surrey Quays | 2010 |
| PN Business Analysis Limited | Towcester | 2016 |
| Pn&Cat Ltd | Northampton | 2024 |
| PNC Healthcare Ltd. | Wolverhampton | 2018 |
| Pnem Consulting Ltd | Corby | 2025 |
| PNU Limited | Liverpool | 2019 |
| Pocket Manager Ltd | Newcastle Upon Tyne | 2020 |
| Pocketful of Whispers Ltd | Wednesbury | 2024 |
| Podiatry Grazia Clinic Limited | Leeds | 2024 |
| Podofeet Ltd | Bolton | 2025 |
| Point Investment Ltd | Sevenoaks | 2025 |
| Pointex Ltd | London | 2018 |
| Pointproof Ltd | London | 2024 |
| Points Clinic Ltd | Slaithwaite | 2025 |
| Policing Centre of Excellence Limited | Gillingham | 2017 |
| Policysprint Ltd | Aughnacloy | 2021 |
| Polikai Onriyam | Uxbridge | 2016 |
| Polly Clinic Ltd | London | 2025 |
| Ponteland Footcare Ltd | Newcastle Upon Tyne | 2018 |
| Poole Horizons Ltd | Colchester | 2022 |
| Poppy Legal Ltd | London | 2024 |
| Poribar Healthcare Ltd | Barking | 2025 |
| Port-Smith (U.K) Limited | Basildon | 2023 |
| Portiahealth Limited | Leamington Spa | 2024 |