| Plowright Organic Limited | Bridgwater | 2020 |
| Plsgroupuk Ltd | Richmond | 2020 |
| Pluckerston Farms | Kirriemuir | 2012 |
| Pluddos Web Limited | Ruardean | 1996 |
| Plumb Associates Limited | Chelmsford | 2008 |
| Plumbly & Gaze Limited | Bromsgrove | 1954 |
| Plumford Farms Limited | Faversham | 1956 |
| Plumley Shellfish Limited | King'S Lynn | 2019 |
| Plumstead Farms Limited | Norwich | 1997 |
| Plush Interior Designs Limited | Romsey | 2018 |
| Plutus Bloodstock Limited | Newmarket | 2014 |
| PLW Holdings Ltd | Newark | 2021 |
| Plymouth Boat Fishing Limited | Plymouth | 2020 |
| Plymouth Reptile and Aquatic Ltd | Plymouth | 2014 |
| PM Bloodstock Limited | Downpatrick | 2022 |
| PM Equine Limited | Newry | 2023 |
| PM Farms Limited | Bridge Of Weir | 2006 |
| PM Frenchies Limited | Wigan | 2022 |
| PM Processing Limited | Co Fermanagh | 2004 |
| PMA Farming Ltd | Banbridge | 2016 |
| PMB Green Lawn Gardening and Facility Services Ltd | Ellesmere Port | 2019 |
| Pmbx Ltd | Weston-Super-Mare | 2022 |
| PMC Agri Services Limited | Strabane | 2025 |
| PMC Fishing Ltd | Newry | 2003 |
| PMC Harvesting Limited | Canonbie | 2018 |
| PMD Holdings Ltd | Stoke-On-Trent | 2019 |
| PMF Eco-Farm Ltd | Brackley | 2013 |
| PMF Poultry Limited | Lydney | 2012 |
| PMG Engineering Limited | Minster | 2003 |
| PMG Trading Limited | Magherafelt | 2013 |
| PMJ Services (Shetland) Ltd | Shetland | 2014 |
| PMK Tree Specialists Ltd | Portree | 2025 |
| Pmlpoultry Ltd | Armagh | 2026 |
| PMM Farming Limited | Solihull | 2026 |
| PMX Diving Ltd | Gourock | 2017 |
| PN7 Ltd | Tonbridge | 2010 |
| PNM Enterprises Limited | Waterlooville | 2015 |
| PNR Estates Limited | Glasgow | 2024 |
| PO Thoroughbreds Ltd | Bury St. Edmunds | 2024 |
| Pobl Y Fforest | Carmarthen | 2001 |
| Pocket Producer Ltd | Burnley | 2025 |
| Pocklingtons Limited | Northampton | 2019 |
| Pockmor Limited | Kilham Driffield | 2002 |
| POD and Posy Ltd | Barrow-Upon-Humber | 2023 |
| POD Boats Limited | Birmingham | 2013 |
| POD Polo Ltd | Peterborough | 2004 |
| Podium Products and Services Limited | Bolton | 2024 |
| Pogson Farmers Limited | Huddersfield | 1998 |
| Polar Prawns UK Ltd | London | 2026 |
| Polar Timber Limited | Dorking | 2010 |
| Polaris Fishing Company Limited | Fraserburgh | 1986 |
| Polaris South West Limited | Cornwall | 2006 |
| Polbain House Farm Ltd | Ullapool | 2012 |
| Polden Farms Limited | Street | 1939 |
| Polders Pigs Limited | Bury St. Edmunds | 2024 |
| Pole Farming Limited | Taunton | 2005 |
| Polehanger Farms Limited | Shefford | 1970 |
| Polesworth Garage Limited | Tamworth | 1967 |
| Polevolt Fish Ltd | Bournemouth | 2025 |
| Pollard Bloodstock Limited | Glasgow | 2024 |
| Pollbraddagh Farm Limited | Omagh | 2025 |
| Pollen Hill Ltd | Leicester | 2022 |
| Pollenize Community Interest Company | Plymouth | 2018 |
| Pollinium Limited | London | 2018 |
| Polly Estates Limited | Ross-Shire | 1960 |
| Pollybell Farms Limited | Doncaster | 1993 |
| Polly’S Pet Care Services Ltd | Chislehurst | 2024 |
| Polo Animal Ltd | Windsor | 2026 |
| Polo Breeding Limited | London | 2017 |
| Polo Connect UK Limited | Maidenhead | 2025 |
| Polo Events Team Limited | Winkfield Windsor | 2001 |
| Polo Sports PR Ltd | Woking | 2018 |
| Polo Technology Limited | Shootash | 2021 |
| Pologistics Limited | Aldermaston | 2024 |
| Polosolutions Ltd | Ascot | 2026 |
| Polquhairn Limited | Cumnock | 2012 |
| Polrevagh Investments Limited | Rugby | 2017 |
| Polson Farm Limited | Launceston | 2023 |
| Polson Fishing Company Limited | Lerwick | 2026 |
| Poltreworgey Ltd | Port Isaac | 2026 |
| Polventon Farm Limited | Liskeard | 2006 |
| Polymath Properties Ltd | Fordingbridge | 2016 |
| Polyphenom Enterprise Ltd | Birmingham | 2025 |
| Polytunnel Nursery Limited | Beaconsfield | 2014 |
| POM Cornwall Ltd | Helston | 2025 |
| Pomegranate Properties (Swindon) Limited | Swindon | 2019 |
| Pomegranate Properties SW Limited | Swindon | 2021 |
| Pommard Limited | Accrington | 2025 |
| Pomona Prefect Ltd | Orkney | 2020 |
| Pond Farm (Kent) Limited | Maidstone | 2019 |
| Pond Farm Limited | Saffron Walden | 2017 |
| Pond Farm SH Limited | Kingsbridge | 2026 |
| Pond Force Limited | Barnet | 2006 |
| Pond Park Limited | Royston | 1999 |
| Pondfield Stud Limited | London | 2021 |
| Pondfolk Ltd | Bungay | 2020 |
| Pondhead Farms Ltd | King'S Lynn | 2019 |
| Pondhead Limited | Lyndhurst | 2014 |
| Pondit Water Services Limited | London | 2019 |
| Pongo Farms Limited | Kidderminster | 2017 |