| Rashen Ltd | Real estate | 2023 |
| RAT & Rabbit Consulting Limited | Administrative & support | 2012 |
| RAT & Rabbit Properties Limited | Real estate | 2019 |
| Ratedballers Limited | Information & communication | 2025 |
| Rathore Private Limited | Wholesale & retail | 2012 |
| Rational Technical Services (UK) Limited | Manufacturing | 2021 |
| Rattanpal Capital Ltd | Real estate | 2024 |
| Rattik Homes Limited | Real estate | 2025 |
| Rattikan Waste Management Limited | Water & waste | 2026 |
| Raur Ltd | Wholesale & retail | 2025 |
| Ravenswoode Limited | Education | 2016 |
| RAW Provisions Company Ltd | Other services | 2016 |
| RAW3 Ltd | Administrative & support | 2016 |
| Rawlinson, Pryde and Partners | | 2009 |
| Raww Consultancy Limited | Professional & scientific | 2024 |
| RAY Coates Holdings Limited | Financial services | 2024 |
| Raya's Food Ltd | Hospitality | 2025 |
| Rayjay Quality Care Ltd | Health & social care | 2019 |
| Raymond Smith Garages Ltd | Wholesale & retail | 2022 |
| Rayner Electrical Limited | Other services | 2006 |
| Rayner Events Ltd | Wholesale & retail | 2025 |
| Rayner Family Homes Ltd | Construction | 2024 |
| Raynicot Limited | Professional & scientific | 2011 |
| Raynton Prestige Ltd | Wholesale & retail | 2026 |
| RAYTRAVELS1 Ltd | Transport & logistics | 2024 |
| Rayzer Ltd | Wholesale & retail | 2020 |
| RAZ & Sons Transport Ltd | Water & waste | 2021 |
| RAZ Transport Ltd | Transport & logistics | 2020 |
| Raza Renovations Limited | Construction | 2021 |
| RB (Kempston) Ltd | Wholesale & retail | 2019 |
| RB Bathrooms Limited | Construction | 2022 |
| RB Contracting Ltd | Information & communication | 2020 |
| RB Curry Express Ltd | Hospitality | 2014 |
| RB Restorers Ltd | Wholesale & retail | 2025 |
| Rb&B Logistics Ltd | Transport & logistics | 2026 |
| Rbmonk Ltd | Hospitality | 2026 |
| RBS Haulage Ltd | Transport & logistics | 2019 |
| RBT Demolition Ltd | Construction | 2023 |
| RBW Kitchens Limited | Construction | 2026 |
| RC Build Ltd | Construction | 2021 |
| RC Consulting and Finance Limited | Professional & scientific | 2014 |
| RCA Holdings Ltd | Professional & scientific | 2016 |
| RCH 17 Investments Ltd | Real estate | 2022 |
| RCM Air Products Limited | Manufacturing | 2016 |
| RCM Equipment (UK) Limited | Manufacturing | 2013 |
| RCN Ltd | Health & social care | 2014 |
| RCN Properties Ltd | Real estate | 2023 |
| RCS Services (UK) Limited | Administrative & support | 2013 |
| RD Cleaning Ltd. | Administrative & support | 2022 |
| RD Designs & Partners Ltd | Professional & scientific | 2021 |
| RD Enterprises (Music) Ltd | Arts & recreation | 2012 |
| RD Land & Promotion Ltd | Professional & scientific | 2022 |
| RD Lettings Ltd | Real estate | 2016 |
| RD Music Ltd | Arts & recreation | 2025 |
| RDB Express Ltd | Transport & logistics | 2026 |
| RDC Futures Ltd | Real estate | 2018 |
| Rdnp Ltd | Administrative & support | 2016 |
| RDP Engineering Ltd | Other services | 2013 |
| RDV Electronics (UK) Limited | Administrative & support | 2013 |
| RE Aarim Limited | Wholesale & retail | 2022 |
| RE Consulting Services Limited | Administrative & support | 2025 |
| Re-Nu Electrical Service Limited | Wholesale & retail | 2009 |
| React & JO Ltd | Wholesale & retail | 2025 |
| Ready Repairs Ltd | Construction | 2025 |
| Ready Steady MOW Limited | Administrative & support | 2018 |
| Readygo Diagnostics Limited | Professional & scientific | 2016 |
| Real Bedford Coffee Limited | Hospitality | 2024 |
| Real Bedford FC Limited | Arts & recreation | 2021 |
| Real Haulage Ltd | Transport & logistics | 2026 |
| Real Management Services (UK) Limited | Professional & scientific | 2008 |
| Real Turf and Landscaping Limited | Administrative & support | 2024 |
| Real-Time Virtual Assistance Services Ltd | Wholesale & retail | 2020 |
| Realise Value Capital Ltd | Professional & scientific | 2012 |
| Realitea Ltd | Information & communication | 2017 |
| Realprime Property Management Limited | Households | 1990 |
| Realta Agency Limited | Real estate | 2025 |
| Realtime Prop Ltd | Real estate | 2020 |
| Realtime Tech Ltd | Information & communication | 2017 |
| Realty 2 Invest Ltd | Real estate | 2024 |
| Rebecca Marsala Flowers Ltd | Wholesale & retail | 2013 |
| Rebecca Marsala Weddings Ltd | Wholesale & retail | 2019 |
| Rebecca Sampson Design Limited | Administrative & support | 2018 |
| Rebel Chaps & Co Ltd | Other services | 2019 |
| Reborn Media Limited | Information & communication | 2012 |
| Rec-Electrical Ltd | Construction | 2024 |
| Receptional Holdings Limited | Financial services | 2017 |
| Receptional Limited | Professional & scientific | 2014 |
| Reclaim-You Care Givers Ltd | Health & social care | 2025 |
| Recording Rooms Limited | Information & communication | 2017 |
| Recovery Rods CIC | Education | 2026 |
| Rectory Court (Sandy) Limited | Households | 1988 |
| Rectory Properties Developments Limited | Real estate | 2017 |
| Rectory Services Ltd | Information & communication | 2006 |
| Recycle Ways Ltd | Information & communication | 2024 |
| Red 5 People Ltd | Administrative & support | 2018 |
| Red ANT Data Limited | Information & communication | 2020 |
| Red Bird Retail Ltd | Wholesale & retail | 2025 |
| Red Construction East Limited | Construction | 2025 |
| Red Construction London Limited | Construction | 2025 |
| Red Construction Major Projects Limited | Construction | 2015 |