| Ransonmoor Farm Limited | King'S Lynn | 1970 |
| Ranton Trout Fishery Limited | Stafford | 2023 |
| Ranworth Farms Limited | Norwich | 1947 |
| RAPHY07 Limited | Liverpool | 2023 |
| Rapid Tackle Ltd | Dover | 2020 |
| Rappaw Ltd | Bordon | 2018 |
| Raptor Propagation Farm Ltd | Deal | 2026 |
| Raptors Logistics Ltd | Buckie | 2021 |
| Raptors of Penwith Ltd | Penzance | 2016 |
| Rare Breeds Survival Trust | Kenilworth | 1975 |
| Rarenow Limited | Tyne And Wear | 1988 |
| RAS Aquaculture Research Ltd | Llandwrog | 2011 |
| RAS Meadows Ltd | Frome | 2025 |
| RAS Technology Ltd | Cupar | 2023 |
| Rasmussens Boligudlejning Limited | Bromley | 2008 |
| Rata Tree Limited | Faversham | 2009 |
| Ratarnet Eggs Ltd | Banbridge | 2020 |
| Ratatak Limited | Saxmondham | 2015 |
| Ratattack Pest Control Limited | Matlock | 2014 |
| Ratcliffe Farms Limited | Atherstone | 1965 |
| Rathillet Farms Limited | Cupar | 2011 |
| Rathkenny Livery Limited | Okehampton | 2023 |
| Ratkinson Ltd | Beverley | 2025 |
| Raton Line Ltd | Hounslow | 2023 |
| Rattler Properties Ltd | London | 2017 |
| Rattlerow Farms Limited | London | 1998 |
| Rattlerow Scotland Limited | Aberdeen | 2013 |
| Rattray Estates Limited | Aberdeen | 1986 |
| Ravara Farms Limited | Newtownards | 2013 |
| Raveagh Estates Ltd | Omagh | 2023 |
| Raven Farms Limited | March | 1992 |
| Raven Forestry and Land Management Limited | Seaham | 2025 |
| Ravencloud Limited | Market Harborough | 2010 |
| Ravencote Ltd | Liphook | 2024 |
| Ravenhill Farms Ltd | Armagh | 2026 |
| Raveningham Farms,Limited | Norwich | 1951 |
| Ravensnest (Holdings) Limited | London | 2021 |
| Ravensnest FLY Fishery Limited | Chepstow | 2017 |
| Ravenswick Farms Limited | York | 1965 |
| Ravenswick Hall Farms Ltd | Middlesbrough | 2024 |
| Raventhorpe Nursery Limited | Beverley | 2010 |
| RAW CUT Stems Limited | Stirling | 2026 |
| RAW Essex Ltd | London | 2023 |
| RAW Farm Limited | Omagh | 2014 |
| RAW Forestry Limited | Edinburgh | 2022 |
| RAW Mellifera Limited | Chippenham | 2019 |
| RAW N Pure | Shepshed | 2022 |
| RAW Natural Foods Ltd | South Croydon | 2024 |
| RAW Northumberland Limited | Hexham | 2024 |
| Rawatchdogs Ltd | London | 2024 |
| Rawding Partners Limited | Winchester | 2011 |
| Rawes Farm Ltd | Middletown | 2024 |
| Rawfir UK Ltd | Morden | 2022 |
| Rawlings & Davis Ltd | Chippenham | 2008 |
| Rawnsley Agricultural Ltd | Halifax | 2020 |
| Rawson Dairying Limited | Dewsbury | 2024 |
| Rawson Farms Ltd | York | 2002 |
| RAY Darley Limited | Malton | 2003 |
| RAY Horton Animal Feeds Limited | Church Stretton | 2003 |
| RAY Small Contractors Limited | Doncaster | 1998 |
| RAY White Limited | Whitchurch | 2002 |
| Ray's VEG Ltd. | Taunton | 2009 |
| Rayard Showjumping Ltd | Cirencester | 2015 |
| Raymar Marine Limited | Nairn | 2016 |
| Raymed Limited | Midhurst | 1995 |
| Raymond & Jean Elizabeth Bewick Trading Limited | Liverpool | 2015 |
| Raymond Contractors Ltd | Hereford | 2017 |
| Raymond Farming Limited | Taunton | 2007 |
| Raymond Mcleod (Farms) Limited | Bury St Edmunds | 1964 |
| Raymond Rankin Limited | Newtownards | 2006 |
| Rayne Farms Ltd | Inverurie | 2025 |
| Rayner Farms Limited | London | 2002 |
| Rayner SIM (Fishing) Ltd. | Fraserburgh | 2003 |
| Raynham Farm Company Limited(The) | Fakenham | 1957 |
| Raynham Farm Company Livestock Limited | Fakenham | 1997 |
| Rays Shrimps Limited | Wigton | 2000 |
| Razorbill Ltd | St. Austell | 2016 |
| RB Farriery Ltd | Milton Keynes | 2024 |
| RB Forestry Unlimited | Manchester | 2023 |
| RB Harvesting Ltd | London | 2024 |
| RB Land Management Limited | Rotherham | 2012 |
| RB Logcuts Ltd | Leominster | 2020 |
| RB Sport Horses Limited | Rosyth | 2026 |
| RB Treemasters Ltd | Maidenhead | 2008 |
| Rbca Services Limited | Campbeltown | 2018 |
| RBJ Fishing Services Ltd | Fraserburgh | 2019 |
| RBJ Leisure Limited | Welshpool | 2021 |
| RBM (Northern) Limited | Richmond | 2004 |
| Rbma Limited | Newtownards | 2009 |
| Rborganic Ltd | Forres | 2005 |
| Rbsq Ltd | Aughnacloy | 2026 |
| Rbst Limited | Kenilworth | 2010 |
| RC and AL Adams Limited | Ashbourne | 2008 |
| RC Baker Ltd | Banbury | 1979 |
| RC Farming Ltd | Ipswich | 2022 |
| RC Farms Limited | Enniskillen | 2017 |
| RC Fisheries Limited | Hull | 2026 |
| RC Fishing Ltd. | Banff | 2010 |
| RC Forestry Ltd | Chester Le Street | 2026 |
| RC Offshore Ltd | Edmondsley | 2015 |