| Resourcing Next Limited | Administrative & support | 2015 |
| Respectable Builders Ltd | Construction | 2016 |
| Rest Assured Accommodations Ltd | Extraterritorial | 2024 |
| Restall Finance Limited | Professional & scientific | 2021 |
| Restoration Care & Services Limited | Health & social care | 2014 |
| Restoration Centre Ltd | Administrative & support | 2020 |
| Restoration City Ltd | Manufacturing | 2023 |
| Restore & Revive Physio Ltd | Health & social care | 2025 |
| Restore Facility Management Ltd | Households | 2019 |
| Restoremyhealth Limited | Health & social care | 2018 |
| Restoring Properties Ltd | Real estate | 2025 |
| Results Consortium Limited | Education | 2002 |
| Retosi Ltd | Professional & scientific | 2019 |
| Retro Facades Ltd | Construction | 2024 |
| Rettendon Limited | Information & communication | 2023 |
| Revel Corp Ltd | Households | 2025 |
| Revelation Bible College | Other services | 2013 |
| Revelation Films Limited | Information & communication | 1992 |
| Revive Haven Care and Support Ltd | Health & social care | 2024 |
| Revive Life UK Limited | Transport & logistics | 2019 |
| Revive Room Ltd | Other services | 2020 |
| Rexel Security Services Limited | Administrative & support | 2024 |
| Rexton Capital Limited | Professional & scientific | 2014 |
| Rexwar Ltd | Real estate | 2021 |
| Rezsmart Ltd | Wholesale & retail | 2008 |
| RF & MM Wave Design Ltd | Manufacturing | 2023 |
| Rfmm Limited | Construction | 2011 |
| RG Marrac Ltd | Public administration | 2022 |
| RG Plumbing Services Limited | Construction | 2025 |
| RG9 Limited | Professional & scientific | 2025 |
| RGA Delivers Ltd | Transport & logistics | 2019 |
| Rgla Doors Ltd | Construction | 2024 |
| RGS Groundworks Limited | Construction | 2024 |
| RHC Fashion Limited | Wholesale & retail | 2020 |
| Rhemedia Ltd | Real estate | 2023 |
| RHM Haulage Limited | Transport & logistics | 2023 |
| Rhodes Entertainment Ltd | Other services | 2026 |
| Rhokonceptz Limited | Other services | 2021 |
| Rhoncy Limited | Professional & scientific | 2019 |
| RHR Building Services Limited | Construction | 2015 |
| Rhys Lees Ltd | Information & communication | 2023 |
| RI Carpeting Ltd | Construction | 2020 |
| RI Sky Official Ltd | Wholesale & retail | 2025 |
| RIA Build (UK) Ltd | Construction | 2019 |
| RIA K Property Ltd | Real estate | 2024 |
| Riarch Planning Solutions Ltd | Professional & scientific | 2021 |
| Riaz & Sons Builders Limited | Construction | 2022 |
| Rich Associates Ltd | Real estate | 2022 |
| Rich ICT Solutions Ltd | Information & communication | 2025 |
| Rich OFF the Block Records Ltd. | Information & communication | 2018 |
| Rich-Medics Ltd | Health & social care | 2021 |
| Richade & Co Limited | Construction | 2016 |
| Richappz Ltd | Information & communication | 2016 |
| Richard Electrical and Building Services (UK) Ltd | Construction | 2014 |
| Richard HR Ltd | Construction | 2016 |
| Richards Community Initiative Ltd | Health & social care | 2025 |
| Richer in Stone Ltd | Construction | 2022 |
| Richer Stone Ltd | Construction | 2017 |
| Richfield International Services Limited | Construction | 2000 |
| Richh Rentals Ltd | Wholesale & retail | 2025 |
| Richiefreggs Limited | Professional & scientific | 2016 |
| Richies Consortium Ltd | Information & communication | 2020 |
| Richmark Architectural Ltd | Manufacturing | 2019 |
| Richmo Media Ltd | Manufacturing | 2022 |
| Richmond Toto Professional Cleaning Ltd | Administrative & support | 2021 |
| Richway Ventures Ltd | Health & social care | 2021 |
| Rider Services Ltd | Construction | 2024 |
| Ridham Services Ltd | Health & social care | 2025 |
| Right Help Pathways Services Limited | Hospitality | 2021 |
| Right Sourcing Investments Ltd | Real estate | 2025 |
| Rikswill Limited | Wholesale & retail | 2018 |
| Rimbum Construction Ltd | Construction | 2025 |
| Rims Enterprise Ltd | Wholesale & retail | 2025 |
| Rimsha Sabir Ltd | Health & social care | 2025 |
| Rimvyd Services Ltd | Construction | 2025 |
| Rimwood Joinery Ltd | Manufacturing | 2025 |
| RIO London Property Ltd | Real estate | 2025 |
| Rion Willard Consulting Ltd | Administrative & support | 2019 |
| RIS Environmental Ltd | Professional & scientific | 2015 |
| Rise & Thrive Youth Mentoring C.I.C. | Information & communication | 2011 |
| Rise Estates Upminster Ltd | Real estate | 2020 |
| Rise Inspired Ltd | Hospitality | 2023 |
| Rise Traderz Ltd | Administrative & support | 2025 |
| Rise TS Ltd | Administrative & support | 2026 |
| Rising Sun Initiatives CIC | Education | 2026 |
| Ritam's Group Ltd | Construction | 2021 |
| Riteway Investments Limited | Construction | 2013 |
| Riteway Property Group UK Limited | Real estate | 2023 |
| Rivatex Limited | Real estate | 1993 |
| River Cleaning Ltd | Transport & logistics | 2018 |
| River Valley Care Services Ltd | Health & social care | 2021 |
| Riverdale Ventures Limited | Transport & logistics | 2017 |
| Riverpoint Enterprises Limited | Administrative & support | 2011 |
| Rixstone Transport Services Limited | Transport & logistics | 2020 |
| RIZ Construction Ltd | Construction | 2013 |
| RIZ Electrics Ltd | Manufacturing | 2025 |
| Rizq Properties Limited | Real estate | 2025 |
| Rizuk Tech Ltd | Wholesale & retail | 2020 |
| RJ Andrews Holdings Limited | Financial services | 2025 |
| RJ Andrews Properties Limited | Real estate | 2021 |