| Rebellious Promotions Ltd | Health & social care | 2014 |
| Reberty Consulting Ltd | Professional & scientific | 2011 |
| Rebmit Ltd | Manufacturing | 2006 |
| Rebome Ltd | Wholesale & retail | 2025 |
| Rebtech Ltd | Professional & scientific | 2011 |
| REC Midlands Ltd | Construction | 2025 |
| Reckinsier Ltd | Professional & scientific | 2015 |
| Reclaim Experts Ltd | Financial services | 2024 |
| Reclifts Ltd | Administrative & support | 2025 |
| Recline & Rise Limited | Wholesale & retail | 2014 |
| Recognise Media Limited | Hospitality | 2018 |
| Recoveraid Limited | Wholesale & retail | 2020 |
| Recovery Services Leicester Ltd | Wholesale & retail | 2025 |
| Recoverypak Limited | Extraterritorial | 2004 |
| Recovis Ltd | Wholesale & retail | 2026 |
| Recra Ltd | Administrative & support | 2020 |
| Recra Recruitment Solutions Limited | Administrative & support | 2022 |
| Recreational Fitness Limited | Arts & recreation | 2017 |
| Recreations Printing Limited | Manufacturing | 2023 |
| Recruitsphere Ltd | Administrative & support | 2026 |
| Rectory Property Investments Limited | Real estate | 2022 |
| Recycling News Ltd | Extraterritorial | 2017 |
| Red & Black Valeting Ltd | Other services | 2025 |
| Red 3 Consulting Ltd | Real estate | 2020 |
| Red 360 Consulting Ltd | Professional & scientific | 2020 |
| Red August Ltd | Wholesale & retail | 2013 |
| Red Aware Digital Limited | Manufacturing | 2010 |
| Red Bric Homes Ltd | Construction | 2017 |
| Red Bric Investments Ltd | Real estate | 2017 |
| Red Bric Ltd | Construction | 2010 |
| Red Brick Construction Ltd | Construction | 2021 |
| Red Cherry Enterprises Limited | Administrative & support | 2004 |
| Red Chilli Corp Ltd | Manufacturing | 2019 |
| Red Clearances & Services Ltd | Water & waste | 2023 |
| Red CPS Limited | Construction | 2020 |
| Red Expert Transport Ltd | Transport & logistics | 2020 |
| Red Fish Systems Limited | Information & communication | 2010 |
| Red FOX Consultants Ltd | Professional & scientific | 2021 |
| Red GEM Holding Limited | Financial services | 2018 |
| Red GEM Properties Limited | Real estate | 2020 |
| Red Gorilla International Ltd | Extraterritorial | 2017 |
| Red Hill Circle Ltd | Hospitality | 2025 |
| Red Hills Holdings Limited | Financial services | 2026 |
| Red Hills LAB Ltd | Professional & scientific | 2022 |
| Red India Limited | Hospitality | 2015 |
| Red LES Gaming Ltd | Wholesale & retail | 2019 |
| Red Lion Store Limited | Wholesale & retail | 2026 |
| Red Lodge Racing Limited | Administrative & support | 2002 |
| Red Media Live Ltd | Administrative & support | 2018 |
| Red Monkey Play Limited | Manufacturing | 2012 |
| Red Motor Cars Ltd | Wholesale & retail | 2022 |
| Red Optical Ltd. | Wholesale & retail | 2014 |
| Red Parrot Accountancy Limited | Professional & scientific | 2024 |
| Red PEA Media Limited | Arts & recreation | 2016 |
| Red Peach Property Limited | Administrative & support | 2007 |
| Red PEN Commercial Limited | Real estate | 2020 |
| Red Quarter Estates Properties Limited | Real estate | 2026 |
| Red Reaper Ltd | Wholesale & retail | 2026 |
| Red Ridge Services Ltd | Real estate | 2023 |
| Red Sea Cafe and Restaurant Leicester Ltd | Hospitality | 2025 |
| Red Sensors Limited | Manufacturing | 2016 |
| Red Square Carpenter Ltd | Construction | 2025 |
| Red Storage Box Ltd | Transport & logistics | 2025 |
| Red Strategic Finance Ltd | Professional & scientific | 2010 |
| Red Top Consulting Ltd | Information & communication | 2019 |
| Red Umbrella Christmas Co Limited | Arts & recreation | 2011 |
| Red Zone Consulting Ltd | Information & communication | 2025 |
| Red&Black Garage Ltd | Wholesale & retail | 2024 |
| Redbak Global Ltd | Wholesale & retail | 2009 |
| Redbak Media Ltd | Other services | 2019 |
| Redband UK Limited | Wholesale & retail | 1981 |
| Redbham Ltd | Information & communication | 2015 |
| Redbird Accountants (London) Ltd | Professional & scientific | 2019 |
| Redbird Accountants Ltd | Professional & scientific | 2011 |
| Redbournbury Haulage Ltd | Transport & logistics | 2014 |
| Redbus Retail Consultancy Ltd | Professional & scientific | 2024 |
| Redcar Property Holdings Limited | Real estate | 2021 |
| Reddy & Pegg Properties Ltd | Real estate | 2023 |
| Reddy Constructions Ltd | Construction | 2026 |
| Redeemed Christian Church of GOD Green Pastures Parish | Other services | 2023 |
| Redefine Living Asset Management Limited | Construction | 2015 |
| Redefine Living Ltd | Health & social care | 2020 |
| Redemsia Limited | Health & social care | 2023 |
| Redfoxrock Ltd | Construction | 2026 |
| Rediscovered Originals Ltd | Extraterritorial | 2020 |
| Redlands-Toller Management Company Limited | Households | 1984 |
| Redline Green Limited | Administrative & support | 2025 |
| Redline Studios Limited | Professional & scientific | 2008 |
| Rednal Opportunities Ltd | Transport & logistics | 2014 |
| Redondd Ltd | Construction | 2022 |
| Redrap Ltd | Real estate | 2021 |
| Redress Hub Ltd | Administrative & support | 2026 |
| Redrock Energy Assessments Ltd | Professional & scientific | 2025 |
| Redruth House Management Company Limited | Households | 1983 |
| Reds Property Lettings Ltd | Construction | 2021 |
| Redsec Ltd | Manufacturing | 2024 |
| Redshift Associates Limited | Administrative & support | 2016 |
| Redstar (Leic) Ltd | Manufacturing | 2025 |
| Redstar Projects Limited | Administrative & support | 2010 |
| REDSTAR3 Ltd | Wholesale & retail | 2026 |