| Petra Bloodstock Agency Limited | London | 1980 |
| Petrochemix Asia Pacific (U.K.) Ltd | Liverpool | 2019 |
| Petroisky Africa Limited | Tower Hamlets, London | 2025 |
| Petrosiute Ltd | Wisbech | 2025 |
| Petrozaza Holdings Ltd | Bury St. Edmunds | 2015 |
| Petrus Breeding Investments Limited | Marlborough | 2018 |
| Pets and Pups Ltd | Alfreton | 2021 |
| Pets Come First Limited | Welling | 2022 |
| Pets Home From Home Ltd | Birmingham | 2023 |
| Pets on the Green Ltd | Warlingham | 2025 |
| Petslove UK Ltd | Wellingborough | 2025 |
| Petsville Farm C.I.C. | Barrow-Upon-Humber | 2020 |
| Petties Paws Limited | Harrogate | 2013 |
| Pettings Court Holdings Ltd | Sevenoaks | 2022 |
| Petwise Ltd | Whitchurch | 2014 |
| Petwood Farming Co.(Woodhall)Limited | Lincoln | 1957 |
| Petzark Limited | Coventry | 2023 |
| Pewag Forestry UK Ltd | Carlisle | 2023 |
| PF Indalo Ltd | Cardiff | 2019 |
| PF Stud Ltd | Cheltenham | 2024 |
| PFF Holdco Limited | Huntingdon | 2023 |
| PFN Farms Ltd | Dungannon | 2016 |
| PG & AJ Jarvis Limited | Thetford | 2003 |
| PG & CP Whitehouse Limited | Mitcheldean | 2013 |
| PG Farms Ltd | Peterborough | 2018 |
| PG Sport Horses Ltd | Northampton | 2020 |
| PG Timber Limited | Presteigne | 2011 |
| Pgbullys UK Ltd | Cardiff | 2021 |
| PGF Forestry Limited | Omagh | 2023 |
| Pghops Company Limited | Lugwardine | 2017 |
| Pgrl Ltd | High Peak | 2015 |
| PH & JE Murray Limited | Diss | 2025 |
| PH Flesh Collection Limited | Northampton | 2018 |
| PH Grass Converters Limited | Anglesey | 2018 |
| PH23 Fishing Ltd | Poole | 2024 |
| Phalaris Limited | Newbury | 2022 |
| Phamm + Ltd | Alexandria | 2023 |
| Phannatiq Limited | Upminster | 2008 |
| Phantom Kennelz Ltd | Halifax | 2024 |
| Phar Services Ltd | Newton Abbot | 2022 |
| Phareligions Apparel Ltd | Ruislip, | 2025 |
| Pharm Fertilizers Limited | Cheltenham | 2020 |
| Pharming International Ltd | Liverpool | 2020 |
| Phasera Limited | Bracknell | 2012 |
| PHD Agri Limited | Ruthin | 2022 |
| Pheasant Acre Plants Ltd | Bridgend | 2024 |
| Pheasant Leisure Services Ltd | Barnstaple | 2013 |
| Pheasantry Farms and Brewery Limited | Newark | 2020 |
| Pheasants Hill Farm Limited | | 2002 |
| PHF Land and Property Services Limited | Loughborough | 2015 |
| Phil Benson Contracting Ltd. | Faringdon | 2009 |
| Phil Chambers Velocity Angling Ltd | Battle | 2011 |
| Phil Holt & SON Limited | Harpenden | 2016 |
| Phil Miles Limited | Salisbury | 2014 |
| Phil Preece Livestock Services Limited | Church Stretton | 2010 |
| Phil Staunton Limited | Cheltenham | 2025 |
| Phil Whiteman Game Rearing Limited | Kidderminster | 2026 |
| Phil's Social Farm CIC | Newry | 2018 |
| Philby Limited | Derby | 2014 |
| Philip Baines Ltd | Chesterfield | 2013 |
| Philip C Bath Limited | Beds | 1954 |
| Philip Gill Contracting Limited | Fortrose | 2011 |
| Philip Green Agriculture Limited | Wilstead | 2019 |
| Philip Hopkins Produce Limited | South Yorkshire | 2003 |
| Philip Liverton Limited | Colchester | 2006 |
| Philip Maddocks Farms Ltd | Newport | 2025 |
| Philip Matthews Agricultural Contractors Limited | Chesham | 2013 |
| Philip Millington Water Services Limited | Lowestoft | 2010 |
| Philip Morris Haulage Limited | Craven Arms | 2003 |
| Philip Odam Agricultural Services Limited | Somerset | 2006 |
| Philip R Dann Limited | East Sussex | 2004 |
| Philip Sidford Limited | Salisbury | 2004 |
| Philip SMY Fishing Limited | Lowestoft | 2023 |
| Philipson Partners Limited | Berwick-Upon-Tweed | 2012 |
| Phillip Hepburn Limited | Fraserburgh | 2003 |
| Phillips (Bockleton Farm) Limited | Hereford | 1976 |
| Phillips Farming Ltd | Haddenham | 2026 |
| Phillips of Devauden Limited | Chepstow | 2014 |
| Phillips Plant Property Countryside Ltd | Blandford Forum | 2021 |
| Phillips Transport Limited | Chepstow | 1998 |
| Philp Farm Contracts Limited | Halstead | 1998 |
| Philp Farming Limited | Reading | 2019 |
| Philstan Limited | Liskeard | 2016 |
| Phinda Management Limited | East Chelborough | 2001 |
| Phocle Lake Limited | Ross On Wye | 2013 |
| Phoebe Rumble Equestrian Ltd | Orpington | 2025 |
| Phoebe’S Pigs Ltd | Tewkesbury | 2024 |
| Phoenix Agri Ltd | Salisbury | 2026 |
| Phoenix Agriculture Limited | Chester-Le-Street | 2019 |
| Phoenix Bird Control Services Limited | Brandon | 2012 |
| Phoenix Falconry (Scotland) Limited | Auchterarder | 2012 |
| Phoenix Fishing Company Ltd | Thurso | 2020 |
| Phoenix Grain Company Limited | Preston | 1962 |
| Phoenix Grain Group Ltd | Preston | 2023 |
| Phoenix Pharma Group Ltd | Welling | 2025 |
| PHR Equine Limited | Newmarket | 2025 |
| PHR Trading Ltd | Norwich | 2018 |
| Phre Trees Ltd | Totnes | 2022 |
| Phyla Tech Limited | Kingston Upon Thames | 2021 |
| Phyona Ltd | Stamford | 2021 |