| Re-Stock Ltd | Wholesale & retail | 2019 |
| Reacting Ltd | Information & communication | 2025 |
| Reactive Restoration Limited | Administrative & support | 2018 |
| READY2GO Consultants Ltd | Professional & scientific | 2025 |
| Real Estate Project Limited | Real estate | 2021 |
| Real Technology Ltd | Wholesale & retail | 2025 |
| Realcare Health Services Ltd | Health & social care | 2024 |
| Realstar Connections Limited | Wholesale & retail | 2020 |
| Realtime IT Services Limited | Information & communication | 2018 |
| Rebbec Company Ltd | Health & social care | 2022 |
| Rebeadi Ltd | Construction | 2017 |
| Rebespi 2005 Ltd | Construction | 2014 |
| Rebuilders Ltd | Real estate | 2025 |
| Recavo Ltd | Information & communication | 2026 |
| Recovery Life Care Ltd | Health & social care | 2024 |
| RECOVERY24HOURS Limited | Transport & logistics | 2019 |
| Recruit Connect & Training Centre Ltd | Administrative & support | 2013 |
| Recruitment an Alternative Solution Ltd | Information & communication | 2023 |
| Recruitment Saga Ltd | Administrative & support | 2021 |
| Red & Black Architectural & Structural Steel Ltd | Construction | 2019 |
| Red Comb Limited | Other services | 2019 |
| Red Core FM Ltd | Construction | 2026 |
| Red Core Group Ltd | Financial services | 2026 |
| Red Core Solutions Ltd | Manufacturing | 2025 |
| Red Rooster London Ltd | Hospitality | 2018 |
| Red Roosters London Ltd | Hospitality | 2022 |
| Red Rose Motors Ltd | Wholesale & retail | 2019 |
| Red Sky Driving School Limited | Education | 2025 |
| Red Unic Ltd | Construction | 2019 |
| Redanoy (UK) Limited | Real estate | 2010 |
| Redanoy Properties Limited | Real estate | 2023 |
| Redbridge Builders Limited | Other services | 2022 |
| Redbridge Driving School Ltd | Education | 2026 |
| Redeemed Christian Church of GOD - KKT | Other services | 2016 |
| Redolence Home Ltd | Wholesale & retail | 2024 |
| Redwood Care Services Limited | Health & social care | 2024 |
| Reede Motor Club Limited | Manufacturing | 2026 |
| Reef Electrical Maintenance Ltd | Manufacturing | 2023 |
| Reeljim Ltd | Transport & logistics | 2019 |
| Reels Casino Slots Ltd | Arts & recreation | 2015 |
| Reem Ltd | Construction | 2018 |
| Reem Property Limited | Real estate | 2018 |
| Reen Health Ltd | Health & social care | 2009 |
| Reet & Veer Estates Limited | Real estate | 2018 |
| Reet Singh Construction Limited | Construction | 2019 |
| Refinedgarmsuk Ltd | Wholesale & retail | 2026 |
| Refiner's House of Praise (International) Ministries | Other services | 2012 |
| Refiner's House of Praise Ltd | Other services | 2024 |
| Reflections Catering Ltd | Health & social care | 2014 |
| Reflourish Ltd | Administrative & support | 2025 |
| Reform Young People Ltd | Administrative & support | 2023 |
| Refresh Your Home Ltd | Construction | 2020 |
| Refreshing Care Limited | Health & social care | 2022 |
| Refuge of GOD Ministries | Other services | 2014 |
| REG Direct Limited | Wholesale & retail | 2025 |
| REG. Sealant Ltd | Construction | 2024 |
| Regal Moments Ltd | Hospitality | 2026 |
| Regal Motors Limited | Wholesale & retail | 2023 |
| Regal VAS Ltd | Construction | 2025 |
| Regatta Global Limited | Transport & logistics | 2015 |
| Regeneration Global Limited | Wholesale & retail | 2024 |
| Regent Management & Consultancy Ltd | Professional & scientific | 2019 |
| Regscope Compliance Limited | Professional & scientific | 2018 |
| Reguz Homes Limited | Construction | 2018 |
| Regyjay Limited | Information & communication | 2022 |
| Rehal Express Limited | Transport & logistics | 2025 |
| Rehem Installations Ltd | Real estate | 2023 |
| Rehoboth Global Foods Ltd | Hospitality | 2025 |
| Rehoboth Limited | Real estate | 2004 |
| Rehoboth Point Services Limited | Administrative & support | 2015 |
| Rehoboth Property Intl Ltd | Real estate | 2024 |
| Rehobothh Property Ltd | Real estate | 2024 |
| Rejazz Ltd | Construction | 2020 |
| Rejosh Ltd | Administrative & support | 2016 |
| Rejuvenate Bodyworks Limited | Other services | 2025 |
| Relevenr Ltd | Construction | 2020 |
| Reliable and Fast Services Ltd | Administrative & support | 2023 |
| Reliance Utilities Limited | Construction | 2026 |
| Relief Investment Ltd | Financial services | 2020 |
| Relux Property Services Limited | Real estate | 2025 |
| Remax Makeups Limited | Other services | 2025 |
| Remdraly Design Ltd | Manufacturing | 2015 |
| Remidy Organic Limited | Other services | 2024 |
| Remlads Limited | Health & social care | 2018 |
| Remlek Limited | Administrative & support | 2025 |
| Remus Empire Ltd | Construction | 2025 |
| Remz@Co Ltd | Transport & logistics | 2021 |
| REN External Ltd | Construction | 2020 |
| Renaden Limited | Health & social care | 2013 |
| Renoluxe Ltd | Construction | 2021 |
| Renova Builders Ltd | Construction | 2020 |
| Rent a Bike Ltd | Administrative & support | 2021 |
| Renwellette Limited | Health & social care | 2013 |
| Repose Counselling Services Ltd | Health & social care | 2025 |
| Represcent Ltd | Wholesale & retail | 2025 |
| Reputize Ltd | Information & communication | 2013 |
| Resalah Ltd | Education | 2023 |
| Rescue Midwife Ltd | Wholesale & retail | 2021 |
| Reso-Solutions Ltd | Professional & scientific | 2017 |
| Resolveco Ltd | Manufacturing | 2012 |