| Reboot HR People Solutions Ltd | Professional & scientific | 2021 |
| Rebro Hydraulic Services Limited | Manufacturing | 1998 |
| Rebus Estates Ltd | Real estate | 2018 |
| Reclaimed Upvc Ltd | Other services | 2017 |
| Reclaimed Wood Staffordshire Limited | Wholesale & retail | 2025 |
| Recognitionhr Ltd | Administrative & support | 2011 |
| Recon Ortho Solutions Ltd | Wholesale & retail | 2024 |
| Recon Properties Limited | Construction | 2024 |
| Recr Limited | Mining & quarrying | 2025 |
| Recticel Insulation UK Ltd | Manufacturing | 2022 |
| Recticon Limited | Wholesale & retail | 2025 |
| Recycle Moore Ltd | Water & waste | 2022 |
| Red 1892 Limited | Real estate | 2016 |
| Red 2 Design Ltd | Information & communication | 2003 |
| Red 7 Capital Ltd | Real estate | 2022 |
| Red Apple Food Ltd | Wholesale & retail | 2020 |
| Red Brick Cafe Limited | Hospitality | 2019 |
| Red Cloud Business Services Limited | Administrative & support | 2019 |
| Red Flags and Roses Ltd | Information & communication | 2026 |
| Red Folder Consultancy Ltd | Information & communication | 2012 |
| Red House Propco Limited | Real estate | 2018 |
| Red Onion Werrington Ltd | Hospitality | 2025 |
| Red Rocket Music Ltd | Wholesale & retail | 2024 |
| Red Rose Paint Supplies Limited | Wholesale & retail | 1984 |
| Red Rose Paints Limited | Professional & scientific | 2016 |
| Red Street Developments Limited | Construction | 2025 |
| Red White Ltd | Wholesale & retail | 2025 |
| Redclift Limited | Wholesale & retail | 2026 |
| Redguard Security Limited | Administrative & support | 1995 |
| Redirect Properties and Asset Management Limited | Households | 2025 |
| Redlark Limited | Real estate | 2017 |
| Redlion Checkley Community Limited | Hospitality | 2025 |
| Redmoor Consulting Limited | Professional & scientific | 2012 |
| Redmoor Investments Limited | Hospitality | 2012 |
| Redoq Ltd | Administrative & support | 2011 |
| Redouble Digital Limited | Information & communication | 2024 |
| Redouble Group Limited | Information & communication | 2019 |
| Redroostersonline Ltd | Hospitality | 2026 |
| Redstone Centre Limited | Education | 2010 |
| Reed 888 Limited | Transport & logistics | 2014 |
| Reed Capital (NE) Ltd | Financial services | 2019 |
| Reed Holdings (N.E.) Limited | Financial services | 2020 |
| Reeds Professional Cleaning & Alterations (Northern) Limited | Manufacturing | 2011 |
| Reels in Motion Holdings Limited | Financial services | 2023 |
| Reels in Motion Limited | Information & communication | 2004 |
| Reeltrax Ltd | Information & communication | 2021 |
| Reeve Homes Ltd | Real estate | 2021 |
| Reeves Property Lettings Ltd | Real estate | 2025 |
| REF Refrigeration Air Conditioning Limited | Construction | 2007 |
| Reffiness Finance Ltd | Financial services | 2020 |
| Reffiness Limited | Financial services | 2022 |
| Refine Coaching UK Ltd | Other services | 2026 |
| Refinish IQ Consulting Ltd | Professional & scientific | 2025 |
| Refractory and Kiln Furniture Supplies Ltd | Manufacturing | 2015 |
| Refreshing Media Ltd | Information & communication | 2018 |
| Regal Hire Limited | Other services | 2021 |
| Regen-X-Health Ltd | Health & social care | 2016 |
| Regency Builders Stoke Ltd | Construction | 2017 |
| Regency Funeral Services Limited | Other services | 2004 |
| Regency Joinery Limited | Manufacturing | 2013 |
| Regency Shrewsbury Ltd | Hospitality | 2021 |
| Regeneration Developments Limited | Construction | 2022 |
| Regenesis Developments Limited | Real estate | 2006 |
| Regent Park Motors Ltd | Wholesale & retail | 2021 |
| Regional Railways Ltd | Wholesale & retail | 2018 |
| Regis Primary Care Services Limited | Health & social care | 2019 |
| Regolith Ltd | Wholesale & retail | 2023 |
| Rehoboth Well CIC | Wholesale & retail | 2022 |
| REI Trans Ltd | Transport & logistics | 2022 |
| Reid & Twin Ltd | Wholesale & retail | 2022 |
| Reign Bar & Grill Ltd | Hospitality | 2026 |
| Reign FBA Ltd | Wholesale & retail | 2026 |
| Reiko Kaneko Limited | Arts & recreation | 2009 |
| Reis Building Maintenance & Utilities Limited | Construction | 2025 |
| REJ Retail Ltd | Wholesale & retail | 2024 |
| Relaxing Rhino Ltd | Wholesale & retail | 2022 |
| Relay Consultancy Ltd | Administrative & support | 2015 |
| Relbs Property Ltd | Real estate | 2025 |
| Reliable Crew Services Ltd | Information & communication | 2017 |
| Reliabuild Property Management Ltd | Construction | 2025 |
| Reliance Medical Holdings Ltd | Financial services | 2019 |
| Reliance Medical Ltd | Wholesale & retail | 2006 |
| Rellum Estates (North West) Limited | Real estate | 2021 |
| Rema Property Developments Ltd | Real estate | 2024 |
| Remedial Group Ltd | Construction | 2026 |
| Remigijus Vindasius Ltd | Manufacturing | 2024 |
| Remkis Directors Ltd | Administrative & support | 2019 |
| Remkis Investments Limited | Agriculture & fishing | 2009 |
| Removals Solution Ltd | Transport & logistics | 2019 |
| Renaissance Rehab Limited | Health & social care | 2024 |
| Rendezvous Fast Food 1 Ltd | Hospitality | 2025 |
| Renew Stoke CIC | Water & waste | 2026 |
| Renewedge Limited | Real estate | 2024 |
| Renov-A-Nation Ltd | Construction | 2020 |
| Renovate Leads Limited | Professional & scientific | 2025 |
| Renovax Construction Ltd | Construction | 2019 |
| Rent Eaze Ltd | Households | 2024 |
| Rental Specialists Ltd | Real estate | 2026 |
| Renzo Fried Chicken Limited | Hospitality | 2026 |
| Repair Network Nationwide Ltd | Manufacturing | 2019 |