| THE Old Dairy Farm Livery Yard Limited | Hampshire | 2011 |
| THE Old East Barn Ltd | Southampton | 2025 |
| THE Old Farm Sheep Co Limited | Bradford On Avon | 2022 |
| THE Old Forge Collective Limited | Beccles | 2024 |
| THE Old Hough Fishery Ltd | Middlewich | 2024 |
| THE Old Long Barn Ltd | Southampton | 2024 |
| THE Old Mine Small Holding Ltd | Morpeth | 2023 |
| THE Old Rectory Farmhouse Limited | Maldon | 2024 |
| THE Old Rectory Poultry Farm Ltd | Dungannon | 2015 |
| THE Old Vicarage Farm Limited | Bickerstaffe | 2026 |
| THE Old Ways Farming Limited | Bridport | 2015 |
| THE One Bait Ltd | Tewkesbury | 2025 |
| THE Orchard Cambridgeshire Ltd | Wisbech | 2025 |
| THE Orchard EA Limited | Doncaster | 2019 |
| THE Orchard Equestrian Centre Limited | Doncaster | 2022 |
| THE Organic EGG Company Ltd | Dartford | 2017 |
| THE Organic PIG Company Ltd. | Norfolk | 1998 |
| THE Organic Seed Bank Limited | Cardiff | 2024 |
| THE Origin of Species Ltd | Broadstairs | 2023 |
| THE Original HUT Company Ltd | Robertsbridge | 2010 |
| THE Oversized Timber Co. Limited | London | 2019 |
| THE Oyster Restoration Company Limited | Aultbea | 2022 |
| THE Passionate Gardener Ltd | Margate | 2012 |
| THE Pasture Raised EGG Co Ltd | Bridport | 2026 |
| THE Patch & STY Ltd | Newtown | 2023 |
| THE Patch MK Limited | Milton Keynes | 2020 |
| THE Patchwork Fold Ltd | Milton Keynes | 2025 |
| THE PAW Spa (Barnsley) Ltd | Barnsley | 2023 |
| THE Pawvoy Dog Hotel Ltd | Basildon | 2025 |
| THE Peaceful Pony CIC | Chorley | 2020 |
| THE Peaceful Potager Limited | Reading | 2019 |
| THE Peasant Evolution Producers Cooperative | Bridport | 2006 |
| THE Peatland Restoration Foundation | Dundee | 2026 |
| THE Performance Horse Limited | Hereford | 2003 |
| THE Pest Company Essex Ltd | Leigh-On-Sea | 2025 |
| THE Pest Technician Limited | Billingham | 2017 |
| THE Pet and Working Gundog Organisation Limited | Newton Abbot | 2010 |
| THE Pet Butler Ltd | Chepstow | 2024 |
| THE Pet Nanny Swansea Ltd | Swansea | 2026 |
| THE Pet Studio - Grooming Ltd | Clevedon | 2009 |
| THE Pet Studio - Kennels Ltd | Bristol | 2009 |
| THE Pet Travel Centre Ltd | Dereham | 2025 |
| THE Pine Prodigy Limited | Shepperton | 2022 |
| THE Pinehurst Group Ltd | Shefford | 2018 |
| THE Planet Earth Foundation CIC | London | 2024 |
| THE Planet POT Limited | Norwich | 2024 |
| THE Plant Boutique Ltd | London | 2020 |
| THE Plant Nursery Ltd | Rugby | 2018 |
| THE Plant POT PIG Ltd | Thornhill | 2023 |
| THE Plant Specialist (Nursery) Limited | Buckinghamshire | 2005 |
| THE Plant Studio Limited | Nottingham | 2026 |
| THE Plumes (Lincs) Ltd | Spalding | 2023 |
| THE POD Pantry Ltd | Lisburn | 2026 |
| THE Polo Pony Programme Ltd | Newark | 2024 |
| THE POM Lady Ltd | Gainsborough | 2025 |
| THE Pony Sanctuary Limited | Newton Abbot | 2016 |
| THE Pooch Palace Ltd | Southampton | 2018 |
| THE Pooch Parlour Ltd | Llantwit Major | 2024 |
| THE Poplars (2025) Ltd | Daventry | 2025 |
| THE Potato Link Limited | Ely | 2015 |
| THE Poultry Patch Limited | Bodmin | 2014 |
| THE Predator Angler Ltd | Warrington | 2024 |
| THE Premier Mushroom Group Limited | Somerset | 2005 |
| THE Price Whitehead Company Limited | Tenterden | 2002 |
| THE Proforest Initiative | Oxford | 2010 |
| THE Pupfluencer Ltd | Aylesbury | 2024 |
| THE Pussy Cat Hillton Ltd | Rainham | 2025 |
| THE Pytchley Hunt Masters 2009 Limited | Northamptonshire | 2009 |
| THE Quadrant (Newark Close) Management Company Limited | Letchworth Garden City | 1991 |
| THE Racing Retreat (Lambourn) Limited | Brecon | 2025 |
| THE RAD Art Community Action Station Ltd. | Umberleigh | 2020 |
| THE Ragwort Fairy Ltd | Cardiff | 2019 |
| THE Rainbow Coloured Eggs Company Limited | Fareham | 2022 |
| THE Rainbow EGG Company Limited | Oxenhope | 2011 |
| THE Rainforester Limited | Botley | 2018 |
| THE Ranch Sanctuary Ltd | Portland | 2026 |
| THE Rare Plant Shop Ltd | Burnley | 2019 |
| THE Real Flower Petal Confetti Company Limited | Pershore | 2003 |
| THE Real GFC Limited | York | 2023 |
| THE Real Seed Collection Ltd | Newport | 2006 |
| THE Real Tree Company Limited | Cheshire | 2004 |
| THE Real Truffle Hunters Ltd. | Liverpool | 2019 |
| THE Regal Palms Triangle Limited | London | 2022 |
| THE Regenerative Collective C.I.C. | Truro | 2025 |
| THE Regenerative Farming Company Ltd | Caldicot | 2023 |
| THE Reindeer Centre Limited | Ashford | 2022 |
| THE Reptile Cave Ltd | Hastings | 2025 |
| THE Rescue Hotel Ltd | Newport | 2021 |
| THE Retreat Property Company Limited | Norwich | 2000 |
| THE Rewilding and Reforestation Company Limited | Ashford | 2024 |
| THE RIG Charger Ltd | Caergybi | 2025 |
| THE Rising Fishery Ltd | Burnley | 2019 |
| THE Ritso Fishing Company Limited | Devon | 2000 |
| THE Rock Dairies Ltd | Claudy | 2023 |
| THE Rolleston Hall Estates Limited | Leicestershire | 1995 |
| THE Rooftop Farm Limited | High Wycombe | 2013 |
| THE Root Zone Ltd | West Malling | 2013 |
| THE Roots Organisation Ltd | London | 2015 |
| THE Roth Partnership Limited | Stowmarket | 2022 |
| THE Roundel Preservation Company Limited | St. Leonards-On-Sea | 1994 |