| Ragdolly Annas Franchising Limited | Education | 2014 |
| Ragdolly Annas Ltd | Education | 2021 |
| Ragdolly Annas Music & Play Limited | Education | 2013 |
| Rags Group Limited | Wholesale & retail | 2020 |
| Rahal Holding Co Ltd | Financial services | 2019 |
| Rahidis Ltd | Health & social care | 2022 |
| Rahma Superfoods & Co. Limited | Wholesale & retail | 2025 |
| RAI Consultancies Limited | Professional & scientific | 2006 |
| RAI Research Ltd | Administrative & support | 2022 |
| Raicomp Ltd | Construction | 2023 |
| Raida Ltd | Transport & logistics | 2023 |
| Raileanu Engineering Ltd | Construction | 2018 |
| Raileval Solutions Limited | Professional & scientific | 2023 |
| Railtel Consult Limited | Information & communication | 2001 |
| Raina & Sienna Ltd | Real estate | 2020 |
| Rainbow Bletchley Limited | Wholesale & retail | 2014 |
| Rainbow Caching Limited | Wholesale & retail | 2023 |
| Rainbow Pharmacy Limited | Wholesale & retail | 2010 |
| Rainbow Services (GB) Limited | Wholesale & retail | 2014 |
| Raindrops Consulting Ltd | Professional & scientific | 2016 |
| Raines & Willow Limited | Wholesale & retail | 2009 |
| Raining Chain Limited | Manufacturing | 2022 |
| Rainmaker Innovation Limited | Professional & scientific | 2011 |
| Rainscourt Law LLP | | 2013 |
| Raise Standards Empower People Limited | Professional & scientific | 2025 |
| Raising Champion for Christ CIC | Health & social care | 2025 |
| RAJ Douth Event Management Ltd | Hospitality | 2024 |
| RAJ Douth Ltd | Hospitality | 2024 |
| RAJ4 Properties UK Ltd | Real estate | 2026 |
| Raja W Properties Ltd | Real estate | 2024 |
| Rajab ALI & Sons Ltd | Manufacturing | 2011 |
| Rajbans Driving School Limited | Education | 2025 |
| RAJE79 Limited | Health & social care | 2025 |
| Rajes Commercial Group Ltd | Wholesale & retail | 2023 |
| Rajes Developments Ltd | Real estate | 2021 |
| Rajo Private Hire Ltd | Transport & logistics | 2025 |
| Raju & Sanju Limited | Real estate | 2003 |
| Rajya Groups Ltd | Real estate | 2021 |
| Rakshans Ltd | Wholesale & retail | 2023 |
| Rale Construct Ltd | Construction | 2024 |
| Ralfie Ltd | Manufacturing | 2018 |
| Ralk Limited | Health & social care | 2022 |
| Rally-Raid Products Limited | Manufacturing | 2010 |
| Rallyemerchandise Limited | Wholesale & retail | 2014 |
| Ralph's Engineering Ltd | Construction | 2015 |
| Ralston Enterprises Limited | Information & communication | 2011 |
| RAM Air Conditioning Ltd | Construction | 2022 |
| RAM Engineering & Consultancy Limited | Manufacturing | 2014 |
| RAM Homes Limited | Construction | 2005 |
| RAM Seva NKB Limited | Health & social care | 2025 |
| RAM Social Work Limited | Health & social care | 2017 |
| Ramage Consulting Limited | Professional & scientific | 2026 |
| Ramaj Care Ltd | Health & social care | 2024 |
| Ramana Group Ltd | Real estate | 2025 |
| Ramdon Limited | Construction | 2021 |
| Ramdon Properties Ltd | Real estate | 2022 |
| Ramesh Achari Ltd | Health & social care | 2023 |
| Ramkey Solutions Limited | Information & communication | 2010 |
| Ramos Resupply Ltd | Wholesale & retail | 2026 |
| Rampallied Limited | Professional & scientific | 2003 |
| Ramsay Lawson Ltd | Professional & scientific | 2017 |
| Ramsons MK Ltd | Real estate | 2025 |
| Ramtex Logistics Ltd | Transport & logistics | 2025 |
| Ramy Transport Ltd | Transport & logistics | 2022 |
| Range Logistics Solutions Limited | Transport & logistics | 2023 |
| Ranger Healthcare Limited | Wholesale & retail | 2004 |
| Ranger Mobile Tyres MK Ltd | Wholesale & retail | 2025 |
| Rani Seela Limited | Health & social care | 2025 |
| Rans Intl 1 Limited | Wholesale & retail | 2022 |
| Rans Intl Limited | Wholesale & retail | 2019 |
| Ranveer Foods & Drinks Ltd | Wholesale & retail | 2022 |
| Ranveer Realty Group Ltd | Real estate | 2025 |
| Raoul Woods Carpentry Ltd | Manufacturing | 2026 |
| Rapharay Medicals Ltd | Health & social care | 2025 |
| Rapher Company Ltd | Health & social care | 2025 |
| Raphi Live Limited | Arts & recreation | 2024 |
| Raphi Music Limited | Arts & recreation | 2024 |
| Rapid Couriers (MK) Limited | Transport & logistics | 2026 |
| Rapid Property Buyers Ltd | Real estate | 2013 |
| Rapid Response Health Ltd | Public administration | 2025 |
| Rapid Rides (MK) Limited | Transport & logistics | 2026 |
| Rapid Secure Solution Ltd | Administrative & support | 2024 |
| Rapid Solutions Group Limited | Construction | 2024 |
| Rapid Solutions Limited | Extraterritorial | 1992 |
| Rapid Supply Limited | Health & social care | 2015 |
| Rapidcrew Staffing Ltd | Administrative & support | 2026 |
| Rapipeel Ltd | Other services | 2024 |
| Rapor Limited | Professional & scientific | 2016 |
| Raptor Sports Limited | Wholesale & retail | 2010 |
| Rapture Accounts Limited | Professional & scientific | 2008 |
| Rapture FD Ltd | Professional & scientific | 2015 |
| Rapture Holdings & Investments Ltd | Real estate | 2020 |
| Rare Earth Ltd | Extraterritorial | 2002 |
| Rartud Ltd | Transport & logistics | 2024 |
| RAS Property Investments Ltd | Real estate | 2022 |
| Rasa Limited | Real estate | 2025 |
| Rasas Cleaning Services Limited | Administrative & support | 2021 |
| Rascal Solutions Limited | Administrative & support | 2004 |
| Rascals of Woburn Grooming Academy Ltd | Education | 2018 |
| Rascals of Woburn Ltd | Professional & scientific | 2016 |