| Ranaoyaa Limited | Households | 2022 |
| Rance Limited | Health & social care | 2023 |
| Randall Carpentry Limited | Administrative & support | 2025 |
| Randalsun Capital Limited | Financial services | 2020 |
| Randtech Consulting Ltd | Professional & scientific | 2021 |
| Raneet Limited | Wholesale & retail | 2014 |
| Ranger Charts Limited | Information & communication | 2013 |
| Ranheat Holdings Limited | Manufacturing | 2017 |
| Ranox Ltd | Other services | 2020 |
| Rans Logistics Ltd | Transport & logistics | 2026 |
| Ransfords Ltd | Wholesale & retail | 2026 |
| Ransika Ltd | Health & social care | 2019 |
| Ranu Services Ltd | Administrative & support | 2024 |
| Ranwood Designs Ltd | Professional & scientific | 2022 |
| Rapharma Limited | Health & social care | 2017 |
| Rapid Cars 247 Limited | Transport & logistics | 2017 |
| Rapid Investment Ltd | Construction | 2022 |
| Rapid IT Recycling Limited | Information & communication | 2010 |
| Rapid Reach Media Ltd | Professional & scientific | 2025 |
| Rapid Response Group Ltd | Health & social care | 2015 |
| Rapid Stack Limited | Wholesale & retail | 2026 |
| Rapidmicro Ltd | Water & waste | 2025 |
| Raportix Limited | Information & communication | 2001 |
| Rapport (2020) Limited | Health & social care | 2020 |
| Rare Space Media Ltd | Information & communication | 2010 |
| Rark Prime Limited | Hospitality | 2026 |
| RAS Builders Limited | Construction | 2023 |
| RAS Transport Ltd | Transport & logistics | 2022 |
| Rasi Services Limited | Professional & scientific | 2017 |
| Rasmus Holdings Ltd | Professional & scientific | 2025 |
| Rassta Limited | Wholesale & retail | 2025 |
| Rathlin Limited | Information & communication | 2017 |
| Ratik Limited | Hospitality | 2018 |
| Rationae Machina Controls Ltd | Professional & scientific | 2018 |
| Rational Labelling & Marking Systems Limited (the) | Manufacturing | 1975 |
| Raul & Andra Limited | Transport & logistics | 2019 |
| RAULTRANS24 Limited | Transport & logistics | 2024 |
| RAV Paving Ltd | Construction | 2025 |
| Ravaliya Investments Ltd | Real estate | 2023 |
| Ravat & RAY Dental Care (Bradford) Ltd | Health & social care | 2015 |
| Ravat & RAY Dental Care (Burnley) Ltd | Health & social care | 2014 |
| Ravat & RAY Dental Care (Chadderton) Ltd | Health & social care | 2013 |
| Ravat & RAY Dental Care (Chorley) Ltd | Health & social care | 2014 |
| Ravat & RAY Dental Care (Fitton Hill) Ltd | Health & social care | 2013 |
| Ravat & RAY Dental Care (Ormskirk) Ltd | Health & social care | 2014 |
| Ravat & RAY Dental Care (Salford) Ltd | Health & social care | 2015 |
| Ravat & RAY Dental Care (Wigan) Ltd | Health & social care | 2013 |
| Ravat & RAY Holdings Limited | Health & social care | 2013 |
| Ravat and RAY Dental Care Limited | Health & social care | 2011 |
| Ravcon Holdings Ltd | Financial services | 2024 |
| Raven Consults Limited | Professional & scientific | 2012 |
| Ravensthorpe Service Station Ltd. | Wholesale & retail | 1988 |
| Ravid Cleaning Ltd | Administrative & support | 2025 |
| Ravinder Groundwork Services Ltd | Construction | 2024 |
| RAW (Brown COW) Limited | Hospitality | 2014 |
| RAW Baits Ltd | Wholesale & retail | 2024 |
| RAW Floors Ltd | Construction | 2024 |
| RAW GP Ltd | Professional & scientific | 2014 |
| RAW Homes Limited | Extraterritorial | 2012 |
| RAW Stitch Limited | Wholesale & retail | 2025 |
| Raw-Creative Design Ltd | Professional & scientific | 2025 |
| Rawlings Property Management Limited | Real estate | 2017 |
| Rawlinson Property Consultants Limited | Real estate | 2003 |
| Rawlinson Property Ltd | Households | 2023 |
| Rawstar Ltd | Wholesale & retail | 2024 |
| RAX Productions Ltd | Arts & recreation | 2020 |
| RAY Property Developments Ltd | Construction | 2021 |
| RAY Spedition Ltd | Transport & logistics | 2018 |
| RAY Turner Labour Limited | Administrative & support | 2004 |
| Rayalidan Ltd | Information & communication | 2017 |
| Rayan London Ltd | Hospitality | 2015 |
| Raybis Consulting Ltd | Financial services | 2026 |
| Raydex Mawe Limited | Hospitality | 2026 |
| Rayeve Global Ltd | Health & social care | 2022 |
| Raymar Rentals Ltd | Real estate | 2022 |
| Raymond Wilson Limited | Information & communication | 1986 |
| Rayverdant Synergy Limited | Information & communication | 2024 |
| Rayzane Care Ltd | Health & social care | 2016 |
| RAZ Advisory Ltd | Administrative & support | 2025 |
| RAZ Care Limited | Health & social care | 2016 |
| RAZ Painting and Decorating Ltd | Construction | 2020 |
| Raza Communications Ltd | Other services | 2021 |
| Razco Logistics UK Ltd | Transport & logistics | 2018 |
| Razi Ltd | Financial services | 2012 |
| Razwy Subs Ltd | Information & communication | 2025 |
| RB Beauty Ltd | Other services | 2026 |
| RB Pluming Ltd | Construction | 2025 |
| RB Pro Solutions Ltd | Wholesale & retail | 2026 |
| RB Taxis Ltd | Transport & logistics | 2025 |
| RBF Trans Ltd | Administrative & support | 2018 |
| RBG Diverse Ltd | Construction | 2020 |
| RBP Capital Limited | Financial services | 2022 |
| RBP Commercial Limited | Real estate | 2026 |
| RBP Investment Properties Limited | Real estate | 2021 |
| RBY 24HRCARE Support CIC | Real estate | 2024 |
| RC Architectural Ltd | Professional & scientific | 2017 |
| RC Electric Power Ltd | Wholesale & retail | 2024 |
| RC Fabrications Ltd | Professional & scientific | 2026 |
| RC Groundworks MD Ltd | Construction | 2026 |
| RC Luton Management Company Ltd | Administrative & support | 2017 |