| R Nesa Laundry Services Ltd | Administrative & support | 2023 |
| R O Communications Ltd | Information & communication | 2020 |
| R Pacific Limited | Hospitality | 2019 |
| R Q International Limited | Real estate | 2025 |
| R Recovery Limited | Transport & logistics | 2024 |
| R V DRYLINING1 Limited | Construction | 2022 |
| R V Food & Wines Limited | Wholesale & retail | 2016 |
| R V News (Luton) Limited | Wholesale & retail | 2012 |
| R Vigano Decorators Ltd | Construction | 2023 |
| R Wood Construction Limited | Construction | 2007 |
| R&A Butt Limited | Health & social care | 2019 |
| R&A Butt Properties Ltd | Real estate | 2024 |
| R&A Land Ltd | Construction | 2026 |
| R&B Biggleswade Ltd | Hospitality | 2026 |
| R&C Motors Ltd. | Wholesale & retail | 2023 |
| R&D Promotions Limited | Manufacturing | 2013 |
| R&G Jonczyk Property Ltd | Real estate | 2026 |
| R&J Build Ltd | Construction | 2019 |
| R&J FR Ltd | Construction | 2025 |
| R&J Logistics Ltd | Transport & logistics | 2017 |
| R&N Cheema Logistics Limited | Transport & logistics | 2024 |
| R&O Enterprises Ltd | Information & communication | 2026 |
| R&R Autohaus Ltd | Wholesale & retail | 2025 |
| R&R Heating Luton Ltd | Construction | 2024 |
| R&R Shakes Limited | Hospitality | 2019 |
| R&S Capital Ltd | Real estate | 2026 |
| R&S Healthcare & Medical Aesthetics Ltd | Health & social care | 2023 |
| R&S M Holdings Ltd | Construction | 2024 |
| R&S Recruitment Ltd | Hospitality | 2017 |
| R&S Student Recruiting Ltd | Administrative & support | 2018 |
| R&S UK Properties Limited | Real estate | 2023 |
| R&S Wellness Councelling Services Ltd | Professional & scientific | 2025 |
| R&V Dryliningg Limited | Construction | 2022 |
| R&V Takeaway Ltd | Hospitality | 2025 |
| R&V Talent Co. Ltd | Hospitality | 2025 |
| R&V Transport Limited | Administrative & support | 2019 |
| R-Stavo UK Ltd | Construction | 2016 |
| R. & D. Marine Limited | Manufacturing | 1974 |
| R. S. Basra Properties Limited | Real estate | 2025 |
| R. Sparrow Holdings Ltd | Wholesale & retail | 2024 |
| R.A Jewellers Limited | Wholesale & retail | 2024 |
| R.A.Smith Transport Ltd | Transport & logistics | 2021 |
| R.C Gutters Ltd | Administrative & support | 2024 |
| R.J. Blow Secretaries Limited | Administrative & support | 2006 |
| R.Jrmnonline Ltd | Wholesale & retail | 2024 |
| R.M. Hernal Ltd | Health & social care | 2016 |
| R.R Global U.K Ltd | Transport & logistics | 2026 |
| R.S. London Construction Ltd | Construction | 2018 |
| R.Vos Productions Ltd | Arts & recreation | 2020 |
| R1 Auto Motion Group Limited | Wholesale & retail | 2020 |
| R1 Brickwork Ltd | Construction | 2023 |
| R2 Car Rental Ltd | Administrative & support | 2015 |
| R63 Events Limited | Arts & recreation | 2023 |
| RA Empire Ltd | Real estate | 2021 |
| RA Haven Limited | Real estate | 2025 |
| RA Installation Ltd | Construction | 2024 |
| RA Multiservices Ltd | Wholesale & retail | 2024 |
| RA Properties Investments Limited | Real estate | 2012 |
| RA Removal & Services Ltd | Construction | 2025 |
| Raafe Traders Limited | Wholesale & retail | 2026 |
| Raak Global Deals (UK) Ltd | Professional & scientific | 2024 |
| Rabaj Ltd | Health & social care | 2014 |
| Rabiya Limited | Information & communication | 2025 |
| Rachel Grant Ltd | Hospitality | 2025 |
| Rachhann Limited | Wholesale & retail | 2023 |
| Radiagnostix Limited | Health & social care | 2014 |
| Radiant Assets Ltd | Real estate | 2024 |
| Radiant Establishments Ltd | Wholesale & retail | 2020 |
| Radiant Future Limited | Real estate | 2004 |
| Radio Tatras International Ltd | Information & communication | 2005 |
| Radki Floors Ltd | Wholesale & retail | 2026 |
| Radtax Consulting Ltd | Professional & scientific | 2018 |
| Radu Andreea Logistics Limited | Transport & logistics | 2022 |
| Radu Build Tiles Ltd | Construction | 2026 |
| Radu Ruscan Ltd | Construction | 2024 |
| Radu Shuttering Ltd | Construction | 2025 |
| Radzik Trans Limited | Transport & logistics | 2022 |
| Raemon Limited | Administrative & support | 2019 |
| Raes Investments Limited | Real estate | 2022 |
| RAF Assets Ltd | Real estate | 2023 |
| RAF Auto Centre Ltd | Wholesale & retail | 2025 |
| RAF Auto Services Limited | Wholesale & retail | 2018 |
| RAF Auto Skills Ltd | Wholesale & retail | 2023 |
| RAF Outsourcing Ltd | Professional & scientific | 2023 |
| RAF Traders Limited | Wholesale & retail | 2025 |
| Rafa Trans Limited | Transport & logistics | 2019 |
| Rafal B Ltd | Transport & logistics | 2026 |
| RAFAL-K9 Ltd | Administrative & support | 2025 |
| Rafas Logistics Ltd | Transport & logistics | 2017 |
| Rafferty Developments Ltd | Construction | 2015 |
| Rafferty Properties Limited | Real estate | 2016 |
| Rafi Auto Traders Limited | Wholesale & retail | 2025 |
| Rafidkeys Limited | Wholesale & retail | 2025 |
| Rafs Engineering Ltd | Administrative & support | 2022 |
| Rafs Security Ltd | Transport & logistics | 2017 |
| Rag.V Ltd | Hospitality | 2025 |
| Ragoo Ltd | Wholesale & retail | 2026 |
| Raha Industry Ltd | Wholesale & retail | 2023 |
| Raheem Cars Ltd | Transport & logistics | 2018 |
| Rahma Services Limited | Other services | 2015 |