| Rio's Vips Dog Walking & Training Ltd | Johnstone | 2025 |
| Ripley Nurseries Limited | Woking | 2000 |
| Ripple Effect International | Bath | 1988 |
| Ripple Farm Organics Ltd | Canterbury | 2014 |
| Ripple Farms Limited | Deal | 1991 |
| Rise and Renew Ltd | London | 2021 |
| Rise Resources (Holdings) Ltd | Derby | 2015 |
| Riseborough Farms Limited | Harleston | 1973 |
| Risebridge Livery Ltd | Bristol | 2024 |
| Rishil Farms Company Limited | Horley | 2025 |
| Rising Roots Ltd | Elgin | 2023 |
| Rising Sun Bloodstock Limited | Newmarket | 2017 |
| Rising Sun Farm Trading Company Limited | Newcastle Upon Tyne | 1991 |
| Rising Sun Farms Limited | Appleby-In-Westmorland | 2025 |
| Riston Farms Ltd | Hull | 2023 |
| Ritch Fingask Limited | Inverurie | 2023 |
| Ritch Fishing Ltd. | Peterhead | 2009 |
| Ritchie Farms Ltd | Londonderry | 2013 |
| Ritchie Marine Services Ltd | Peterhead | 2016 |
| Ritchie Property Limited | Grangemouth | 2025 |
| Ritchie's Plant Hire Limited | Westhill | 1990 |
| Ritchie-Bland Estates Ltd | Richmond | 2013 |
| Rival Fishing Co Ltd | Linwood | 2018 |
| Rival Holdings Ltd | London | 2026 |
| Rivenhall Greenhouse Limited | Malvern | 2023 |
| River Almond Limited | Lanark | 2013 |
| River and Rural Limited | Billericay | 2020 |
| River Bend Farm Ltd | Llanelli | 2020 |
| River Blackwater Catchment Trust | Armagh | 2013 |
| River Care Limited | Co. Tyrone | 1994 |
| River Carp Tours Limited | Berkshire | 2006 |
| River Catchment Services Limited | Corbridge | 2008 |
| River DEE Seafoods Limited | Greenfield | 2018 |
| River Doon Trout Company Limited | Ayr | 1980 |
| River Faughan Anglers Limited-The | Derry | 1995 |
| River Gwash Trout Farm Limited | Oakham | 1997 |
| River House Holdings Ltd | Lockerbie | 2026 |
| River Isla Catchment Ltd | Buckie | 2013 |
| River Lark Abstractors Limited | Bury St. Edmunds | 2022 |
| River Link Donkeys and Animal Sanctuary C.I.C. | Deeside | 2021 |
| River Racing Bloodstock Ltd | Exning | 2025 |
| River Skye Partners Limited | Maldon | 2015 |
| River Teign Shellfish Limited | Newton Abbot | 2010 |
| River Yealm Mooring Services Ltd | Plymouth | 2018 |
| Riverbank Farm Limited | Driffield | 2025 |
| Riverbrue Kennels Ltd | Highbridge | 2024 |
| Rivercool Farm Ltd | Maguiresbridge | 2004 |
| Riverdale Rural Services Ltd | Blackpool | 2019 |
| Riverdog Studio Ltd | Richmond | 2020 |
| Riverdown Limited | Newton Abbot | 2002 |
| Rivere Scientific Ltd | London | 2021 |
| Riverfen Farms Ltd | Ely | 1966 |
| Riverfield Fish Farm Limited | Kent | 2008 |
| Riverford Organic Farmers Limited | Buckfastleigh | 1999 |
| Riverfort Eggs Ltd | Ballymoney | 2024 |
| Rivermay Stud and Freelance Groom Ltd | Perth | 2021 |
| Rivermill Farm Ltd | Ballymoney | 2024 |
| Riverrescues Ltd | Edinburgh | 2025 |
| Riverroots Whippets Ltd | South Shields | 2022 |
| Rivers Farm Limited | Taunton | 1950 |
| Riversdale Wagyu Limited | Ballyclare | 2023 |
| Riverside Commodities Ltd | Woodford Green | 2008 |
| Riverside Contractor Limited | Leeds | 2017 |
| Riverside Falcons Limited | Sutton In Ashfield | 2020 |
| Riverside Farm Animal Rescue CIC | Nuneaton | 2024 |
| Riverside Farm JK Limited | Bunny | 2022 |
| Riverside Farm Services Limited | Swanage | 2002 |
| Riverside Glebe Limited | London | 2018 |
| Riverside Livestock Limited | Strabane | 2018 |
| Riverside PIG Farms Limited | Tynan | 2011 |
| Riverside Sport Horses Limited | Chippenham | 2021 |
| Riverside Vineyard Limited | Newtown | 2011 |
| Riverview Bloodstock Ltd | Cambridge | 2017 |
| Riverview Cottage Farm Limited | Wetheral | 2021 |
| Riverview Farm Eggs Limited | Gravesend | 2011 |
| Riverview Farms Limited | Co. Tyrone | 1994 |
| Riverview Fishing Limited | Kilkeel | 2010 |
| Riverwise Ltd | Bingley | 2024 |
| Riviera Farms Limited | Hayle | 2018 |
| Rivis Partners | Malton | 2010 |
| Rivox Ltd | Edinburgh | 2015 |
| RIX Grain Drying Limited | Hull | 2021 |
| RJ & AL Doggrell Limited | Sturminster Newton | 2011 |
| RJ & CA Down Limited | Taunton | 2004 |
| RJ & FM Farmers Limited | Lymm | 2025 |
| RJ & JM Bowen Limited | St Weonards | 2016 |
| RJ & NJ Strachan Limited | Bungay | 2020 |
| RJ & R Marley Limited | Scarborough | 2014 |
| RJ Agri Ltd | Rhyl | 2025 |
| RJ and WV Feakins & Sons Limited | Llandrindod Wells | 2002 |
| RJ Barnett & Sons Ltd | Richhill | 2018 |
| RJ Barrett & Co Ltd | Hereford | 2009 |
| RJ Beer Contracting Limited | Newton Abbot | 2012 |
| RJ Clements Ltd | Omagh | 2023 |
| RJ Goddard & SON Farming Limited | Northampton | 2018 |
| RJ Taylor Farms Ltd | Newmarket | 2016 |
| RJ Vincent Limited | Newport | 2015 |
| RJ Woodland Services Ltd | Omagh | 2017 |
| RJA Agronomy Ltd | Leamington Spa | 2012 |
| RJB (Scotland) Ltd. | Banff | 2005 |