| R&J Sims Services Ltd | Other services | 2025 |
| R&M Coachworks Ltd | Wholesale & retail | 2026 |
| R&P Gurung Ltd | Real estate | 2026 |
| R&R Electrical London Ltd | Construction | 2010 |
| R&S Furniture Designers Ltd | Wholesale & retail | 2018 |
| R&S Investment Properties Ltd | Real estate | 2024 |
| R&S Property Ventures Ltd | Real estate | 2026 |
| R&S Residence Ltd | Real estate | 2026 |
| R. Kunner Ltd | Hospitality | 2024 |
| R. Alves Consultancy Ltd | Information & communication | 2013 |
| R. Kearney Plumbing and Heating Ltd. | Construction | 2015 |
| R.A.S. Installations Limited | Construction | 2001 |
| R.Birch Consultants Limited | Construction | 2021 |
| R22 Haulage Ltd | Transport & logistics | 2025 |
| R22 Holdings Ltd | Financial services | 2026 |
| R2K Consulting London Ltd | Professional & scientific | 2022 |
| R2S Construction Ltd | Construction | 2021 |
| R3 Production Services Limited | Construction | 2023 |
| RA Car Group Ltd | Wholesale & retail | 2025 |
| RA Shop Fitters Ltd | Wholesale & retail | 2025 |
| RA4FAM Ltd | Real estate | 2025 |
| Raaha Limited | Professional & scientific | 2015 |
| Raanan Berlad Limited | Professional & scientific | 2011 |
| Raavi Spice Ltd | Hospitality | 2023 |
| Raaz Constructions Limited | Construction | 2013 |
| Raaz Properties Limited | Real estate | 2024 |
| Rack Them UP Logistics Limited | Wholesale & retail | 2024 |
| RAD Ronin Ltd | Professional & scientific | 2024 |
| Rad&Razor Ltd | Other services | 2026 |
| Radar UK Properties Limited | Households | 2023 |
| Radbuilt Ltd | Real estate | 2022 |
| Radharani Group Limited | Hospitality | 2026 |
| Radharani Limited | Hospitality | 2024 |
| Radical Logistics Ltd | Transport & logistics | 2022 |
| Radiect Ltd | Administrative & support | 2022 |
| Rado Driving Ltd | Transport & logistics | 2016 |
| RAE Management 2 Ltd | Households | 2019 |
| Rael-Brook Limited | Extraterritorial | 1900 |
| RAF UK Properties Ltd | Real estate | 2021 |
| Raftek Ltd | Professional & scientific | 2020 |
| RAG Coffee Limited | Hospitality | 2019 |
| RAG Holdings Limited | Real estate | 2017 |
| RAG Pack Limited | Arts & recreation | 2002 |
| Ragan Ltd | Construction | 2019 |
| Rahber Enterprise Limited | Information & communication | 2015 |
| Rahel's Afro Euro Hair Studio Limited | Other services | 2025 |
| Rahigold Investment Ltd | Real estate | 2019 |
| Rahigold Limited | Hospitality | 1994 |
| RAI Industries Ltd | Households | 2024 |
| RAI SK Limited | Wholesale & retail | 2025 |
| RAI Technical Services Ltd | Professional & scientific | 2020 |
| Raining Rainbows PVT Ltd | Information & communication | 2020 |
| Rajdeep SINGH2 Ltd | Construction | 2025 |
| Rajgara Consultancy Services Limited | Information & communication | 2014 |
| RAK Group Ltd | Financial services | 2024 |
| RAK Technology Solutions Ltd | Information & communication | 2016 |
| RAM Consultancy Services Ltd | Information & communication | 2022 |
| RAM Security Ltd | Administrative & support | 2026 |
| Ramb Investments Ltd | Real estate | 2024 |
| Ramerel&Co Ltd | Construction | 2025 |
| Ramjes Limited | Health & social care | 2023 |
| Raml's Auto Solutions Limited | Wholesale & retail | 2021 |
| Rammaza Trading Ltd | Wholesale & retail | 2022 |
| Ramollah Promotions Ltd | Information & communication | 2025 |
| Ramrock Property Investments Ltd | Real estate | 2025 |
| Ramzy Heritage Ltd | Real estate | 2025 |
| Ranadesign&Build Ltd | Construction | 2023 |
| Randell Ventures Ltd | Professional & scientific | 2025 |
| Randhawa Investments Limited | Real estate | 2017 |
| Ranees Store Ltd | Wholesale & retail | 2018 |
| Rang Mahal Enterprise Ltd | Wholesale & retail | 2025 |
| Rangepay Limited | Hospitality | 1980 |
| Rangiebury Recruitment Limited | Administrative & support | 2024 |
| Ranjan Ltd | Wholesale & retail | 2011 |
| Ranky Ltd | Information & communication | 2016 |
| Ranna Limited | Hospitality | 2019 |
| Ranola Properties Limited | Real estate | 2011 |
| Ransals Limited | Education | 2008 |
| Ransomes Dock Management Company Limited | Households | 2026 |
| Ranu Properties Ltd | Real estate | 2019 |
| RAO H&I Limited | Other services | 2025 |
| Rapid Trans-Lift Ltd | Transport & logistics | 2024 |
| Rapidsource (Holdings) Limited | Financial services | 2018 |
| Rare Books Ltd | Wholesale & retail | 2017 |
| Rasa Associates Limited | Professional & scientific | 2010 |
| Rasavi Investments Limited | Real estate | 2012 |
| Rasavi Limited | Health & social care | 1991 |
| Rasavi Properties Limited | Real estate | 2018 |
| Rashid ALI Investments Ltd | Real estate | 2022 |
| Rasu Lake Ltd | Real estate | 2016 |
| Raunak Club Ltd | Arts & recreation | 2025 |
| Ravencliff Ltd | Wholesale & retail | 2026 |
| Raviro Consult Limited | Professional & scientific | 2023 |
| Raxmi Ltd | Real estate | 2018 |
| RAY House (Ickenham) Management Company Limited | Households | 1989 |
| RAY Telecoms Ltd | Professional & scientific | 2010 |
| Raylands Mead Management Limited | Households | 1985 |
| Raylen Management Company Limited | Real estate | 1986 |
| Rays Enterprises Limited | Health & social care | 2014 |
| Razzy Property Ltd | Real estate | 2012 |