| Reach Peak Performance Limited | Administrative & support | 2021 |
| React 4U (Renewable Energy & Carbon Technology) Ltd | Construction | 2009 |
| Reactive Maintenance Holdings Limited | Construction | 2016 |
| Reactive Maintenance Services (Midlands) Limited | Construction | 2012 |
| Reactive Maintenance Systems Limited | Construction | 2025 |
| Reactive Roofing & Cladding Ltd | Construction | 2023 |
| Readers of Roman Way Ltd | Arts & recreation | 2011 |
| Real IT Consultants Limited | Information & communication | 2018 |
| Real Time Demand Ltd | Administrative & support | 2013 |
| Reality Strikes Academy Ltd | Education | 2025 |
| REALM-4 Productions Ltd | Information & communication | 2016 |
| Rebecca Phillips Limited | Professional & scientific | 2019 |
| Rebel With a Cause Ltd | Real estate | 2017 |
| Reclaim Controls Limited | Manufacturing | 2019 |
| RECO2 Group Ltd | Wholesale & retail | 2023 |
| RECRUIT123 Limited | Professional & scientific | 2018 |
| Recruitsoft Ltd | Information & communication | 2015 |
| Red Hot Restaurant Management Limited | Professional & scientific | 1997 |
| Red House Glass Cone Coffee Shop Limited | Hospitality | 2023 |
| Red Investment Group Limited | Construction | 2025 |
| Red Lion Housings Ltd | Real estate | 2025 |
| Red RAG Chemicals Ltd | Extraterritorial | 2009 |
| Red RAG Wipes Ltd | Extraterritorial | 2009 |
| Red Raven Building Solutions Ltd | Construction | 2025 |
| Red Sails Solutions Ltd | Information & communication | 2022 |
| Red Star Urban Developments Ltd | Construction | 2023 |
| Redbog Ltd | Real estate | 2020 |
| Redboxed Promotions Ltd | Arts & recreation | 2007 |
| Redbrain Holdings Limited | Information & communication | 2021 |
| Redbrain Limited | Information & communication | 2016 |
| Redlake (UK) Limited | Financial services | 2013 |
| Redmont Commercial Finance Ltd | Financial services | 2026 |
| Redmont Financial Ltd | Financial services | 2024 |
| Redrose Real Estate Limited | Real estate | 2024 |
| Reevzys Revenue Ltd | Information & communication | 2026 |
| Reference Technology Ltd | Information & communication | 2002 |
| Refined by Adelaide Ltd | Other services | 2025 |
| Reform Pilates Studios Ltd | Arts & recreation | 2023 |
| Reformer Diaries Limited | Arts & recreation | 2025 |
| Refurbish Build Repair Ltd | Construction | 2025 |
| Regarde Security Limited | Administrative & support | 2003 |
| Regional Air Conditioning Ltd | Energy | 2018 |
| Regulafm Ltd | Professional & scientific | 2025 |
| Reid Accounting Limited | Professional & scientific | 2015 |
| Reid Lettings Limited | Real estate | 2018 |
| Reinke Property Limited | Construction | 2024 |
| Rekers (U.K.) Limited | Wholesale & retail | 1985 |
| Relative Data Services Limited | Information & communication | 2023 |
| Reliance Motors & Parts Ltd | Wholesale & retail | 2026 |
| Reliant Consultants Limited | Information & communication | 2014 |
| Relynk Limited | Real estate | 2021 |
| REM Management Ltd | Professional & scientific | 2025 |
| Rema Leisure Limited | Manufacturing | 2002 |
| Remote Key Limited | Administrative & support | 2004 |
| Removalsco UK Limited | Transport & logistics | 2025 |
| Renew Healthcare & Aesthetics Limited | Health & social care | 2026 |
| Renewable Heating Limited | Construction | 2021 |
| Renfor Four Colour Limited | Extraterritorial | 2009 |
| Renotain Ltd | Construction | 2022 |
| RENT2BUYYOURCAR.COM (Tamworth) Ltd | Wholesale & retail | 2018 |
| Renumo Limited | Professional & scientific | 2025 |
| Renuvo Ltd | Construction | 2010 |
| Renworks Limited | Professional & scientific | 2026 |
| Repair Care International Limited | Wholesale & retail | 1991 |
| Resku Wholesale Ltd | Wholesale & retail | 2023 |
| Restart Supported Living CIC | Health & social care | 2022 |
| Restore Body & Mind Ltd | Arts & recreation | 2019 |
| RET06 Ltd | Wholesale & retail | 2024 |
| Retired Sparky Ltd | Construction | 2014 |
| Retreats Reset Ltd | Other services | 2024 |
| Retrofit Solutions Group Limited | Financial services | 2020 |
| Reuben George Development Partnerships Ltd | Professional & scientific | 2024 |
| Reva Contrast Club Halifax Ltd | Arts & recreation | 2026 |
| Reva Contrast Club Holdings Ltd | Financial services | 2026 |
| Revanped Camper Conversions Ltd | Manufacturing | 2022 |
| Revanta Limited | Extraterritorial | 2024 |
| Revive & Restore Staffordshire Ltd | Construction | 2026 |
| RF Properties Limited | Households | 2016 |
| RF Training Solutions Ltd | Professional & scientific | 2024 |
| Rfsh Distributions Ltd | Wholesale & retail | 2024 |
| RG Sports Therapy Limited | Arts & recreation | 2026 |
| RG Welding & Fabrications Ltd | Manufacturing | 2019 |
| RI Transport Ltd | Transport & logistics | 2020 |
| Richard Blunt Limited | Construction | 2005 |
| Richard Morrall Limited | Financial services | 2008 |
| Richard Parr & SON Limited | Construction | 2023 |
| Right Draft Ltd | Professional & scientific | 2011 |
| Right Education Limited | Administrative & support | 2025 |
| Right Track Solutions Ltd | Manufacturing | 2023 |
| RIGHT2SPEAK CIC | Professional & scientific | 2022 |
| Rightwood Sales Limited | Extraterritorial | 2016 |
| Riley Consultants Limited | Professional & scientific | 2025 |
| Rink Mews Development Limited | Construction | 1991 |
| Rise and Shine Childminding Ltd | Health & social care | 2021 |
| Rise Telecom Solutions Ltd | Information & communication | 2016 |
| Rising Brook Care Group Limited | Financial services | 2025 |
| Rising Brook Care Limited | Health & social care | 2024 |
| Risk Safety Limited | Other services | 2020 |
| River Fields (Southam) Management Company Limited | Households | 2021 |
| River of Life Church (Tamworth) Limited | Other services | 2021 |