| Radhekrishna Limited | Real estate | 2016 |
| Radhex Enterprise Ltd | Wholesale & retail | 2026 |
| Radheyshyam Solutions Limited | Information & communication | 2012 |
| Radhivalondoncouturehouse Ltd | Wholesale & retail | 2025 |
| Radia Estates Limited | Hospitality | 2001 |
| Radial Change Ltd | Education | 2015 |
| Radiant Kenton Limited | Real estate | 2018 |
| Radiant Rhino United Kingdom Limited | Wholesale & retail | 2023 |
| Radiant Robes Ltd | Wholesale & retail | 2025 |
| Radiant Tech UK Ltd | Water & waste | 2022 |
| Radianz Solutions Limited | Extraterritorial | 2014 |
| Radio Communications Limited | Administrative & support | 2008 |
| Radiology Innovation Ltd | Information & communication | 2026 |
| Radiologyinterviews Limited | Health & social care | 2014 |
| Radiometrix Limited | Manufacturing | 1985 |
| Radishan Ltd | Health & social care | 2022 |
| Radit IT Services Limited | Information & communication | 2017 |
| Radium Group Limited | Administrative & support | 2015 |
| Radlett Investments Limited | Real estate | 1994 |
| Radway Mayfair Limited | Hospitality | 2023 |
| Raebeca Ltd | Health & social care | 2012 |
| Raenik Finance Limited | Financial services | 2004 |
| Raffaellair Limited | Transport & logistics | 2017 |
| Raffiq Motors Ltd | Wholesale & retail | 2021 |
| Rafiki Wholesales Limited | Wholesale & retail | 2018 |
| Raft Enterprises Limited | Health & social care | 1990 |
| RAG Tech Ltd | Information & communication | 2022 |
| Raga Kitchen Ltd | Wholesale & retail | 2026 |
| Ragstone Estates Limited | Construction | 2007 |
| Rahbani Group Limited | Financial services | 2023 |
| Rahbani Residential Ltd | Real estate | 2018 |
| Rahjam Designer Silks Limited | Wholesale & retail | 2016 |
| Rahman Industries Ltd | Financial services | 2018 |
| Rahul Events Limited | Hospitality | 2025 |
| RAI Property Management Ltd | Households | 2025 |
| RAI Property Services Limited | Real estate | 2019 |
| Raid ECM Solutions Limited | Information & communication | 2014 |
| Raidenn Limited | Real estate | 2014 |
| Raider Zero Ltd | Administrative & support | 2017 |
| Raies Property Ltd | Real estate | 2025 |
| Raikar & Co Ltd | Wholesale & retail | 2021 |
| Raiki Ltd | Administrative & support | 2025 |
| Rail Electrification Design Limited | Transport & logistics | 2017 |
| Rail Integration Delivery Ltd | Professional & scientific | 2022 |
| Rail Operations Limited | Administrative & support | 2013 |
| Rail Technology International Limited | Professional & scientific | 2017 |
| Railwise Limited | Real estate | 1991 |
| Rainbow Indian Street Food Ltd | Hospitality | 2023 |
| Rainbow Lane Ltd | Professional & scientific | 2019 |
| Rainbow Regulatory Limited | Administrative & support | 2014 |
| Rainbow Stars (UK) Co. Limited | Professional & scientific | 2022 |
| Raindrive Ltd | Education | 2018 |
| Raines International Limited | Administrative & support | 2022 |
| Rainham Health Limited | Health & social care | 2025 |
| Rains Properties Limited | Real estate | 2026 |
| Rains Property LLP | | 2024 |
| Rainsford Limited | Construction | 2011 |
| Rainsford Mann Design Limited | Arts & recreation | 2003 |
| Raintley Properties Ltd | Real estate | 2011 |
| RAJ Enterprises Limited | Wholesale & retail | 1983 |
| RAJ Hardware Store UK Ltd | Wholesale & retail | 2024 |
| RAJ Holidays Limited | Administrative & support | 2010 |
| RAJ Property Services Limited | Construction | 2017 |
| RAJ Retail Ltd | Wholesale & retail | 2025 |
| RAJ Simran Limited | Real estate | 2022 |
| RAJ UK Properties Ltd | Real estate | 2023 |
| Raja Rani Limited | Extraterritorial | 2015 |
| Raja Subedi Ltd | Real estate | 2025 |
| Raja Yoga 8 Ltd | Financial services | 2025 |
| Rajah Rasa Holdings Limited | Real estate | 2024 |
| Rajak Transport Ltd | Wholesale & retail | 2016 |
| Rajani Rail Solutions Ltd | Agriculture & fishing | 2010 |
| Rajem Limited | Real estate | 2014 |
| Rajen Properties Limited | Real estate | 2025 |
| Rajesh Bhovan Studios Limited | Information & communication | 2025 |
| Rajeshri Limited | Financial services | 2024 |
| Rajgov Ltd | Real estate | 2020 |
| Rajpal & Co Ltd | Professional & scientific | 2006 |
| Rajpal Investment Group Ltd | Households | 2017 |
| Rajpal Property Investments Limited | Real estate | 2018 |
| Rajsupport Ltd | Information & communication | 2024 |
| Raju Omlet Ltd | Hospitality | 2026 |
| Rajvar Facility Management Ltd | Construction | 2025 |
| Rajvar Supplies Limited | Wholesale & retail | 2021 |
| Rajvar Technologies Limited | Construction | 2007 |
| Rajwadi Rasoi Ltd | Hospitality | 2024 |
| Rajware Limited | Wholesale & retail | 2026 |
| RAK Medicolegal Limited | Health & social care | 2016 |
| Rakd Consulting Limited | Information & communication | 2025 |
| Rakhs Estates Ltd | Real estate | 2020 |
| Rakhs Limited | Administrative & support | 2002 |
| Rakhs Properties Ltd | Real estate | 2017 |
| Rakore Limited | Information & communication | 2013 |
| Raksham Ltd | Wholesale & retail | 2024 |
| Ralays Limited | Wholesale & retail | 2017 |
| Ralph Heimans Ltd | Arts & recreation | 2015 |
| Ralph Heimans Studio Limited | Real estate | 2019 |
| Ralph Kline Limited | Real estate | 2014 |
| Ralphs Rigging and Construction Ltd | Professional & scientific | 2024 |
| Raluca Coaching Limited | Health & social care | 2024 |