| Retro Jewels Limited | Manufacturing | 2024 |
| Retro Management Limited | Construction | 2012 |
| Retro School of Motoring Ltd | Transport & logistics | 2014 |
| Retro World MK Limited | Wholesale & retail | 2020 |
| Return a Toner Limited | Water & waste | 2010 |
| Return to Green Consulting Limited | Real estate | 2023 |
| Reuben & Morgan (Lancaster Street) Limited | Real estate | 2018 |
| REV Tech Tuning Ltd | Wholesale & retail | 2018 |
| Revader Security Limited | Manufacturing | 2005 |
| Revaisor Ltd | Information & communication | 2023 |
| Revarr Ltd | Administrative & support | 2023 |
| Revayah Services Limited | Administrative & support | 2024 |
| Reve Aesthetics Limited | Manufacturing | 1998 |
| Reve Medical Limited | Manufacturing | 2012 |
| Reverse Distribution Limited | Wholesale & retail | 1994 |
| Review Education Limited | Information & communication | 2023 |
| Reviiv Ltd | Hospitality | 2026 |
| Revis Estates Limited | Hospitality | 1998 |
| Reviva Care Ltd | Health & social care | 2025 |
| Revival of Champions Ltd | Professional & scientific | 2025 |
| Revival Word Christian Centre CIC | Other services | 2024 |
| Revive Gyms Limited | Arts & recreation | 2022 |
| Revive Sharing UK Ltd | Wholesale & retail | 2026 |
| Revive Tech Ltd | Wholesale & retail | 2012 |
| Revivion Limited | Wholesale & retail | 2026 |
| Revmarket Limited | Information & communication | 2024 |
| Revolution Lettings Limited | Real estate | 2015 |
| Revolution Lettings Management Ltd | Real estate | 2017 |
| Revolution Pedal Solutions (RPS) Ltd | Wholesale & retail | 2022 |
| Revolution Speedway.Com Limited | Manufacturing | 2013 |
| Revolve Clothing Japan Limited | Information & communication | 2014 |
| Revolver Technology Limited | Information & communication | 1986 |
| Revomax Engineering Ltd | Manufacturing | 2018 |
| Reward Stamp App Ltd | Information & communication | 2021 |
| Rewild Capital Ltd | Professional & scientific | 2020 |
| Reylec Property Maintenance Services Ltd | Construction | 2023 |
| Reynard Court Management Company Limited | Households | 1985 |
| Reynolds Boughton (Devon) Limited | Manufacturing | 1957 |
| Reynolds Consulting Limited | Professional & scientific | 2004 |
| Reynolds Engineering Limited | Manufacturing | 1996 |
| RF MAX Limited | Manufacturing | 2021 |
| RFA-174 Ltd | Professional & scientific | 2019 |
| RFE Europa Limited | Wholesale & retail | 2010 |
| RFE International (Group) Ltd | Wholesale & retail | 2001 |
| RFO Construction Ltd | Construction | 2022 |
| RFP Construction Ltd | Construction | 2018 |
| RG Building & Landscape Services Ltd | Construction | 2013 |
| RG Pharma Ltd | Professional & scientific | 2023 |
| RG Search Ltd | Administrative & support | 2007 |
| RGC Central Heating and Property Maintenance Ltd | Construction | 2011 |
| RGG Holdings Limited | Financial services | 2020 |
| RGH Contractors Limited | Construction | 2025 |
| Rgovind Hospitality Ltd | Hospitality | 2026 |
| RGR Property Maintenance Limited | Construction | 2019 |
| RGR Rail Ltd | Other services | 2016 |
| RGS Decorators Limited | Construction | 2025 |
| RGS Music Limited | Information & communication | 2012 |
| RH Coaching Group Ltd | Arts & recreation | 2025 |
| RH Conversions Ltd | Manufacturing | 2019 |
| RH149 Investments Limited | Real estate | 2022 |
| RH99STORE Ltd | Wholesale & retail | 2025 |
| Rhatigan Ltd | Construction | 2019 |
| Rhino Consulting Group Ltd | Professional & scientific | 2022 |
| RHL Realisations 2022 Limited | Wholesale & retail | 1999 |
| RHM Property Investment Limited | Real estate | 2019 |
| Rhodee Collection Ltd | Wholesale & retail | 2020 |
| Rhodees Restaurant and Lounge Ltd | Hospitality | 2022 |
| Rhubarb Studios Limited | Professional & scientific | 2008 |
| Rhys a Homes Ltd | Real estate | 2023 |
| Rhythm Room Ltd | Education | 2017 |
| RI (Northants) Ltd | Professional & scientific | 2011 |
| RI Logistics 2 Ltd | Wholesale & retail | 2025 |
| RI Trade Solutions Ltd | Financial services | 2024 |
| RIA Estates Ltd | Real estate | 2020 |
| Riah-Uk Ltd | Wholesale & retail | 2024 |
| Rialto Recordings Limited | Other services | 1985 |
| Rialu Consultancy LLP | | 2024 |
| Riansh Properties Limited | Real estate | 2021 |
| Ribloom Limited | Administrative & support | 2018 |
| Ribson UK Ltd | Information & communication | 2019 |
| Rice: the Sushi Bar Ltd | Hospitality | 2021 |
| Rich and Peace Fashion Ltd | Wholesale & retail | 2022 |
| Rich Global Communications Limited | Professional & scientific | 2014 |
| Rich Partners UK Limited | Energy | 2025 |
| Richard Baxandall Frcs (Orth) Ltd | Health & social care | 2019 |
| Richard Bull Holdings Ltd | Wholesale & retail | 2026 |
| Richard Carr Consulting Ltd | Professional & scientific | 2020 |
| Richard Evans Consultancy Limited | Professional & scientific | 2013 |
| Richard Howes Ltd | Professional & scientific | 2021 |
| Richard Lally Golf Ltd | Wholesale & retail | 2018 |
| Richard Rees Rheumatology Limited | Administrative & support | 2010 |
| Richard's Garden Services Limited | Administrative & support | 2023 |
| Richardson & Peat Limited | Construction | 2006 |
| Richardson (Bedford) Limited | Financial services | 2022 |
| Riches Rigging Ltd | Construction | 2019 |
| Richesther Homes Limited | Administrative & support | 2018 |
| Richesther Semi Independent Living Ltd | Administrative & support | 2016 |
| Richiebuilds Ltd | Construction | 2025 |
| Richtaf Express Logistics Ltd | Transport & logistics | 2012 |
| Richter Sport Limited | Wholesale & retail | 2005 |