| Rataul Machinery Ltd | Real estate | 2019 |
| Ravat Furniture Centre Limited | Manufacturing | 2002 |
| Ravat Plumbing Services Ltd | Construction | 2018 |
| Raven Sports and Child Development Ltd | Education | 2025 |
| Ravenstone Designs Ltd | Construction | 2022 |
| Raving Vapes Limited | Wholesale & retail | 2021 |
| Ravita Pannu Limited | Other services | 2017 |
| RAW Crown Constructions Limited | Construction | 2025 |
| RAW London Markets Limited | Financial services | 2003 |
| RAW Material Cover Ltd | Financial services | 2019 |
| RAW Rides Limited | Professional & scientific | 2023 |
| RAW UW Limited | Financial services | 2024 |
| Rawal Enterprise Group Ltd | Real estate | 2025 |
| RAY Holmes Transport Limited | Transport & logistics | 2016 |
| RAY Smiles Ltd | Health & social care | 2023 |
| Raya Equestrian Ltd | Manufacturing | 2024 |
| Rayburn Environmental Limited | Manufacturing | 2024 |
| Rayburn Holdings Limited | Professional & scientific | 1994 |
| Rayburn Technologies Limited | Manufacturing | 2024 |
| Rayeesa's Indian Kitchen Limited | Manufacturing | 2012 |
| Raymar (Power Press Repairs) Ltd | Manufacturing | 2014 |
| RAZ Accessories Ltd | Wholesale & retail | 2025 |
| RB & Sons Home Improvements Ltd | Extraterritorial | 2024 |
| RB Foods & Catering Ltd | Hospitality | 2024 |
| RB Homes Limited | Real estate | 2022 |
| RB UK Investments Ltd | Real estate | 2022 |
| RBD Transport Limited | Transport & logistics | 2024 |
| Rbee Travel Ltd | Transport & logistics | 2026 |
| Rbgrindinguk Ltd | Construction | 2025 |
| RBK Solar Ltd | Construction | 2024 |
| RBL Events Ltd | Transport & logistics | 2024 |
| RBSD13 Ltd | Wholesale & retail | 2026 |
| RBX Auto Limited | Wholesale & retail | 2024 |
| RC Carpentry Services Ltd | Manufacturing | 2022 |
| RC Frame Solutions Ltd | Construction | 2026 |
| RC Holdings & Property Management Ltd | Real estate | 2022 |
| RCA Solutions Ltd | Information & communication | 2007 |
| RCC Catering Ltd | Hospitality | 2017 |
| RCC Estates Limited | Hospitality | 2025 |
| RCD Plumbing Limited | Construction | 2008 |
| RCG Immigration Law Ltd | Professional & scientific | 2020 |
| RCK Foods Ltd | Wholesale & retail | 2024 |
| Rckc Ltd | Wholesale & retail | 2024 |
| Rcode Limited | Information & communication | 2014 |
| RD 17 Ltd | Hospitality | 2022 |
| RD Clothing Ltd | Wholesale & retail | 2024 |
| RD Finish Ltd | Transport & logistics | 2025 |
| RD Rhodes Limited | Other services | 2020 |
| RDB Ace Performance UK Ltd | Wholesale & retail | 2022 |
| RDB Ace UK Ltd | Wholesale & retail | 2025 |
| RDM Quality Group Ltd | Wholesale & retail | 2018 |
| RDP Commercial Limited | Construction | 2015 |
| RDS Estates Limited | Real estate | 2020 |
| RDS Hub Ltd | Information & communication | 2025 |
| Reach Developers Limited | Construction | 2021 |
| Reach Support CIC | Education | 2013 |
| Reactive Maintenance and Access Ltd | Administrative & support | 2018 |
| Readan Limited | Information & communication | 2012 |
| Readsway Ltd | Real estate | 2017 |
| Ready Business Solutions Ltd | Professional & scientific | 2020 |
| Ready SET Play Ltd | Arts & recreation | 2026 |
| Real Visuals Limited | Professional & scientific | 2025 |
| Realise Higher Growth Ltd | Professional & scientific | 2026 |
| Reality Review Ltd | Information & communication | 2022 |
| Realms of Obscura Limited | Wholesale & retail | 2025 |
| Realtrans Ltd | Transport & logistics | 2025 |
| Rebecca Neill Limited | Professional & scientific | 2018 |
| REBEL2018. Ltd | Transport & logistics | 2018 |
| Rebus Industries Ltd | Arts & recreation | 2024 |
| Recess Cleaning Limited | Real estate | 2009 |
| Recess Properties Ltd | Real estate | 2018 |
| Recliner Sofas Direct Ltd | Wholesale & retail | 2026 |
| Recorded Delivery Limited | Extraterritorial | 2013 |
| Recruitable Staffing Solutions Limited | Administrative & support | 2024 |
| Red Berry Management Company Limited | Construction | 2015 |
| Red Empire Logistics Ltd | Transport & logistics | 2022 |
| Red Empire Properties Ltd | Real estate | 2023 |
| Red Empire Van Rentals Ltd | Administrative & support | 2024 |
| Red Fish Media Ltd | Arts & recreation | 2019 |
| Red House Events Ltd | Hospitality | 2023 |
| Red Lion Powick Limited | Hospitality | 2019 |
| Red Lions Footbal Club Ltd | Education | 2024 |
| Red Moon Holdings Ltd | Financial services | 2022 |
| Red Shop Great Wyrley Ltd | Wholesale & retail | 2025 |
| Red Trucker Ltd | Transport & logistics | 2015 |
| Redbridge Trading Corp Limited | Other services | 2018 |
| Redd Capital Limited | Professional & scientific | 2023 |
| Redd Investments Limited | Real estate | 2007 |
| Reddicap Motors & Recovery Service Ltd | Wholesale & retail | 2025 |
| Reddicap Motors Ltd | Wholesale & retail | 2022 |
| Redgrave Plastics Midlands Limited | Other services | 2018 |
| Redian Software UK Ltd | Information & communication | 2019 |
| Redknows Group Limited | Professional & scientific | 2025 |
| Redknows Limited | Administrative & support | 2017 |
| Redlands Healthcare Limited | Extraterritorial | 2025 |
| Redmire & Walker Limited | Professional & scientific | 2016 |
| Redrock (IP) Limited | Real estate | 2021 |
| Redtwofive Ltd | Professional & scientific | 2015 |
| Redwood Care Limited | Health & social care | 2025 |
| Redwood Recycling Limited | Wholesale & retail | 2021 |