| Pingrade Forestry Limited | Bristol | 2021 |
| Pinhey Farming Ltd | Chulmleigh | 2010 |
| Pink Paws Ltd | Snodland | 2025 |
| Pinkpot Smallholdings Ltd | West Calder | 2025 |
| Pinksmoor Farm Limited | Taunton | 2005 |
| Pinnacle Bloodstock Limited | Derby | 2004 |
| Pinnacle Plants International Ltd | Exeter | 2003 |
| Pinnacle Tree Services Ltd | Bristol | 2024 |
| Pinner Park Farms Limited | Middlesex | 1991 |
| Pinnock Farms Limited | Scunthorpe | 1943 |
| Pinotare Limited | London | 2023 |
| Pinpoint Agricultural Services Limited | Warwick | 2020 |
| Pintace Limited | Torrington | 1985 |
| Pintail Nest Farm Limited | Middlesbrough | 2019 |
| Pioneer Fisheries Ltd | York | 2024 |
| Pioneer Growth Solutions Ltd | Waltham Cross | 2025 |
| Pioneer Habitats Ltd | Chichester | 2023 |
| Pioneering Pest Control Limited | Wisbech | 2022 |
| PIP & Cork Ltd | Petworth | 2018 |
| PIP & Crown Rural Solutions Ltd | Corsham | 2022 |
| PIP and Stone Ltd | Sidmouth | 2018 |
| Pipe Hayes Farm Limited | Ashbourne | 2014 |
| Piper Carson Ltd | Market Drayton | 2022 |
| Piper Farms Feedstock Ltd | Cranbrook | 2014 |
| Pipers Farm Limited | Hertfordshire | 1996 |
| Pipers Honey Limited | Alresford | 2025 |
| Pipp Brook Ltd | Dorking | 2024 |
| Pippin Farm (Pulborough) Ltd | Brighton | 2016 |
| Pippinsplace Dogs Ltd | Rye | 2024 |
| Pipplepen Farms Limited | Taunton | 2009 |
| Pirton Grange Farms Limited | Royston | 2017 |
| Piscaries Limited | Ware | 2023 |
| Piscarium Ltd | London | 2025 |
| Piscatio Ltd. | Aberdeenshire | 2002 |
| Piscator Media Holdings Ltd | Kersey, Ipswich | 2025 |
| Pisces Fishing Ltd | Honiton | 2012 |
| Pitcairn Fishing Company Limited | Cawdor | 1986 |
| Pitch Perfect Robotics Ltd | Bedford | 2026 |
| Pitchcott Hill Farms Holdings Limited | Weymouth | 2020 |
| Pitchcott Hill Farms Limited | Twickenham | 1962 |
| Pitcher Brothers Limited | Diss | 2013 |
| Pitcher Farms Limited | Boston | 1951 |
| Pitchford Tree Services Limited | Merthyr Tydfil | 2020 |
| Pitching Piece Farm Limited | Warminster | 2012 |
| Pither Agriculture Limited | Gloucester | 2003 |
| Piti Plant Haulage Limited | Bushey | 2025 |
| Pitinnan Farms (Daviot) Ltd. | Banff | 2007 |
| Pitlochie Farming Company Limited | Fife | 1998 |
| Pitman & Family Ltd | Dorchester | 2011 |
| Pitmeadow Farm Limited | Perth | 2021 |
| Pitreadie Farm Limited | Aberdeen | 2015 |
| Pitsford Falcons Pest Control UK Ltd | Northampton | 2024 |
| Pitt Farms Limited | Norwich | 1978 |
| Pitt Witherholme Limited | York | 1994 |
| Pittendrigh Farms Limited | Sudbury | 1973 |
| Pittodrie Estate Limited | Grangemouth | 1992 |
| Pitts Farm (IOW) Ltd | Sandown | 2024 |
| Pitwherry Limited | Driffield | 1996 |
| PIX Farm Limited | Hemel Hempstead | 2010 |
| Pixel Leaf Ltd | London | 2022 |
| Pixley Equine Limited | Hyde | 2026 |
| PJ Caunter & SON Limited | Colchester | 2004 |
| PJ Farming Ltd | Aberystwyth | 2024 |
| PJ Jones Services Limited | Rainworth, Mansfield | 2023 |
| PJ Sawbridge & Sons (Farming) Ltd | Milton Keynes | 2025 |
| PJ Sawbridge & Sons Limited | Milton Keynes | 2017 |
| Pj&Hj Onions & Sons Ltd | Carnforth | 2024 |
| PJC Bentall Limited | Faversham | 1996 |
| PJC Consultancy Limited | Hothfield | 2008 |
| PJD Agri Limited | Doncaster | 2022 |
| PJD Farming Limited | Seaton | 2020 |
| PJF Farming Limited | Leamington Spa | 2015 |
| PJH Farming Limited | Billericay | 2006 |
| Pjhp Limited | Billericay | 2011 |
| PJL Group Limited | Tadley | 2013 |
| Pjls Farms Ltd | Bridgwater | 2016 |
| PJM Agri Ltd | Dereham | 2020 |
| PJP Wildlife Ltd | Rugeley | 2026 |
| Pjrn Limited | Stafford | 2017 |
| PJS Farms Ltd | Dover | 2018 |
| PJW Corporate Limited | Crieff | 2017 |
| PK Equestrian Limited | Maidenhead | 2022 |
| PK Farm Ltd | Magherafelt | 2017 |
| PK Ponies Limited | Maidenhead | 2022 |
| PK Poultry Ltd | Cookstown | 2014 |
| PK Ruminant Nutrition Ltd | Newcastle Upon Tyne | 2011 |
| Pkmlj Consultancy Limited | Preston | 2020 |
| Pksl Limited | Ellon | 2024 |
| PL Fegan Potatoes Ltd | Newry | 2009 |
| Place Farm (Norwich) Ltd | Norwich | 1962 |
| Place UK Limited | Norwich | 2001 |
| Plain Farming Limited | Chichester | 2000 |
| Plain Greens Ltd | Whitchurch | 2022 |
| Plaish Farm Ltd. | Newport | 2018 |
| Plaited Ponies Equine Services Ltd | Bathgate | 2019 |
| Plan B Angling C.I.C. | Bury St Edmunds | 2020 |
| Plan Farms Ltd. | Fraserburgh | 2002 |
| Plan IT Plant Ltd | Evesham | 2022 |
| Planbee Ltd. | Dundee | 2011 |
| Planchest Consulting Ltd | Berwick-Upon-Tweed | 2026 |