| Rawdata Consultants Limited | Information & communication | 1996 |
| Rawk Haulage Limited | Transport & logistics | 2021 |
| Rawlinson Technologies Limited | Manufacturing | 2018 |
| Razor Cutz Ltd | Other services | 2023 |
| Razor Kurdish Barbers Ltd | Other services | 2023 |
| RB Elliott Properties Limited | Real estate | 2021 |
| Rbpl Limited | Real estate | 2015 |
| RC Business Advisers Ltd | Information & communication | 2019 |
| RC Chesterfield Limited | Wholesale & retail | 2025 |
| RC Stanfree Limited | Real estate | 2015 |
| Rcdc Electrical Ltd | Construction | 2022 |
| RCS Flooring Ltd | Construction | 2022 |
| RDC Ltd | Real estate | 2025 |
| RDM Structural Site Works Ltd | Construction | 2024 |
| Re-Bar Construction Services Limited | Real estate | 1989 |
| Re-Bar Homes Limited | Real estate | 2026 |
| REA Real Estate Limited | Real estate | 2013 |
| Reach for the Stage Theatre Co Ltd | Arts & recreation | 2006 |
| Read Living Ltd | Real estate | 2025 |
| Read My Mind Limited | Information & communication | 2016 |
| Reading-Nook Ltd | Wholesale & retail | 2026 |
| Ready SET CAM Limited | Administrative & support | 2024 |
| Real Direction Consulting Limited | Administrative & support | 2022 |
| Real Finance Ltd | Financial services | 2015 |
| Real Life Dating Ltd | Professional & scientific | 2025 |
| Real Time Music Limited | Hospitality | 1998 |
| Realising Solutions LLP | | 2011 |
| Reapool Limited | Wholesale & retail | 2016 |
| Reclaim Case Management Limited | Health & social care | 2024 |
| Recompensa Ltd | Administrative & support | 2021 |
| Recon Electrical Limited | Manufacturing | 1996 |
| Record Power Limited | Manufacturing | 2003 |
| Recruit Unlimited Limited | Administrative & support | 2013 |
| Recruitme Global Ltd | Administrative & support | 2024 |
| Rectory Grove (Duckmanton) Management Company Limited | Construction | 2022 |
| Recycling Machinery Developments Ltd | Manufacturing | 2025 |
| Red Apex Consulting Ltd | Information & communication | 2023 |
| Red Baron Limited | Arts & recreation | 2002 |
| Red Flame S40 Ltd | Hospitality | 2023 |
| Red House (Heath) LLP | | 2012 |
| Red Ladybird DE5 Ltd | Hospitality | 2024 |
| Red Ladybird S41 Ltd | Hospitality | 2025 |
| Red Mechanical Services Limited | Manufacturing | 2009 |
| Red Rose Consultants (L&F) Ltd | Professional & scientific | 2020 |
| Red Rose Recruitment (B&S) Limited | Professional & scientific | 2020 |
| Red Spire Mechanical Services Limited | Construction | 2011 |
| Red Sun Asian Ltd | Wholesale & retail | 2024 |
| Red Sun Penang Asian Ltd | Wholesale & retail | 2026 |
| Red Wrench Games Ltd | Information & communication | 2020 |
| RED123 Ltd | Real estate | 2019 |
| Redara Therapy Ltd | Wholesale & retail | 2026 |
| Redbrik Commercial Limited | Real estate | 2025 |
| Redbrik Consulting Limited | Professional & scientific | 2014 |
| Redbrik F&B Limited | Hospitality | 2020 |
| Redbrik Lettings Limited | Real estate | 2015 |
| Redeemed Christian Church of GOD Grace Chapel Chesterfield | Other services | 2010 |
| Redfern Bulk Haulage Ltd | Transport & logistics | 2025 |
| Redhall Network Solutions Holdings Limited | Construction | 2018 |
| Redhall Network Solutions Limited | Information & communication | 2018 |
| Redhead Consulting Ltd | Professional & scientific | 2022 |
| Redhurst Optical Limited | Financial services | 2019 |
| Redland Information Systems Limited | Information & communication | 2011 |
| Redman Construction Ltd | Construction | 2012 |
| Rednic Limited | Health & social care | 2017 |
| Redstar Computer Services Limited | Wholesale & retail | 1994 |
| Redwood Financial Management Limited | Financial services | 2003 |
| Reed Auto Engineering Ltd | Wholesale & retail | 2024 |
| Refactory Limited | Information & communication | 2012 |
| Refined Auto Ltd | Wholesale & retail | 2024 |
| Refolin Ltd. | Real estate | 2011 |
| Reformed Marketing Limited | Professional & scientific | 2024 |
| Regal Oak Holdings Ltd | Financial services | 2026 |
| Regency Minibuses Ltd | Transport & logistics | 2024 |
| Regency ST. James Limited | Wholesale & retail | 2001 |
| Regenecoll Limited | Other services | 2015 |
| Regent's Point Ltd | Real estate | 2022 |
| Rehubot Limited | Hospitality | 2024 |
| Reid Performance Coaching Limited | Other services | 2024 |
| Rejen Ltd | Information & communication | 2026 |
| Relative Power Ltd | Construction | 2021 |
| Relaxicol Limited | Extraterritorial | 2010 |
| Reliable Parking Management Limited | Administrative & support | 2013 |
| Reliable Roofing Services Ltd | Construction | 2023 |
| Relianz Services Limited | Real estate | 2021 |
| Remanufactured Parts Ltd | Manufacturing | 2023 |
| Remedy Recovery Ltd | Other services | 2026 |
| Remyem Ltd | Administrative & support | 2025 |
| Renco (Chesterfield) Limited | Construction | 1987 |
| Rend Clean U.K. Ltd | Administrative & support | 2023 |
| Renew Renovations & Maintenance Ltd | Construction | 2025 |
| Renewable Energy UK Ltd | Construction | 2009 |
| Renforce Manufacturing Ltd | Manufacturing | 2020 |
| Renishaw Caravan Accessories Limited | Wholesale & retail | 2013 |
| Renoco Engineering Limited | Manufacturing | 1992 |
| Renoco Industries Limited | Construction | 2001 |
| Renshaw Agri Contracts Ltd | Agriculture & fishing | 2021 |
| Renshaw Surveyors Limited | Other services | 2017 |
| Rent-A-Ramp Limited | Extraterritorial | 1986 |
| Repair & Waste IT Ltd | Professional & scientific | 2025 |
| Repairgeot Limited | Wholesale & retail | 2004 |