| Quorn Lodge Residents Management Company Limited | Households | 2021 |
| Qureshi Market Research Limited | Professional & scientific | 2010 |
| R & C Kitchen Ltd | Hospitality | 2019 |
| R & E Electrical (UK) Limited | Wholesale & retail | 2005 |
| R & G Plumbing and Heating Limited | Construction | 2011 |
| R & N Hardware Limited | Wholesale & retail | 2012 |
| R & R Beauty Studio & Hair Salon Ltd | Other services | 2015 |
| R & T Mechanics Limited | Wholesale & retail | 2019 |
| R & T Tyres Limited | Wholesale & retail | 2017 |
| R . a. C. Interiors Ltd | Construction | 2019 |
| R a Finance Consulting Ltd | Real estate | 2012 |
| R a J S Evans Investment Company Ltd | Real estate | 2023 |
| R and R Retailing Ltd | Wholesale & retail | 2025 |
| R B Consulting (UK) Limited | Administrative & support | 1998 |
| R Chubb & SON Ltd | Wholesale & retail | 2014 |
| R D R Investments Ltd | Real estate | 2024 |
| R G Watts Consulting Limited | Professional & scientific | 2011 |
| R J B Training Consultancy Limited | Administrative & support | 2013 |
| R J Convenience Limited | Wholesale & retail | 2015 |
| R JAY Autos Ltd | Manufacturing | 2019 |
| R K Patel Ltd | Transport & logistics | 2017 |
| R L Gibbs Ltd | Arts & recreation | 2020 |
| R N Convenience Store Limited | Wholesale & retail | 2009 |
| R O Simms Co Ltd | Health & social care | 2026 |
| R P M Services Limited | Construction | 1996 |
| R R Importers Ltd | Wholesale & retail | 1938 |
| R Shivam UK Ltd | Wholesale & retail | 2020 |
| R Sons (Homes) Limited | Health & social care | 1999 |
| R Sons Limited | Wholesale & retail | 1998 |
| R Thompson Contractors Ltd | Construction | 2018 |
| R V K Truck Engineering Limited | Manufacturing | 1992 |
| R&B Investment Properties Ltd | Real estate | 2025 |
| R&B Ventures Limited | Hospitality | 2024 |
| R&Be Homes Ltd | Real estate | 2025 |
| R&C Electrical Contractors Ltd | Manufacturing | 2012 |
| R&D Contracts Ltd | Construction | 2019 |
| R&G Trading Ltd | Wholesale & retail | 2026 |
| R&M and Partners Limited | Professional & scientific | 2025 |
| R&M Choices Ltd | Construction | 2024 |
| R&N Investment Properties Ltd | Real estate | 2018 |
| R&S Innovations Limited | Wholesale & retail | 2025 |
| R. Astoria Ltd | Administrative & support | 2026 |
| R. D. a. C. L. a. Ltd | Wholesale & retail | 2010 |
| R. D. Chilled Foods - Jani Limited | Wholesale & retail | 2012 |
| R. L. Morris Engineering Ltd. | Manufacturing | 2002 |
| R. S. Autos (Welling) Limited | Wholesale & retail | 2019 |
| R. Smith & Sons Building Contractors Ltd | Construction | 2017 |
| R.A.C.E Award UK Ltd | Administrative & support | 2019 |
| R.A.Watts Limited | Other services | 1953 |
| R.Algar Heating Ltd. | Construction | 2018 |
| R.B.J. Solutions Limited | Information & communication | 2008 |
| R.B.S. Electrical Ltd | Energy | 2015 |
| R.G. Properties Development & Management Limited | Real estate | 1984 |
| R.J. Lifts & Escalators Ltd | Manufacturing | 2002 |
| R.J.Dworzak Estates Limited | Real estate | 2019 |
| R.J.Dworzak Limited | Professional & scientific | 2015 |
| R.M.A.J Property Ltd | Real estate | 2019 |
| R.Manuel & Company Ltd | Professional & scientific | 2022 |
| R.O.S Services Limited | Hospitality | 2015 |
| R.P.D. (London) Limited | Hospitality | 2015 |
| R.S Hospitality Limited | Hospitality | 2015 |
| R.S Management and Decorators Ltd | Construction | 2023 |
| R.S.Currie & Company Limited | Real estate | 1946 |
| R.S.J Enterprise( UK) Limited | Real estate | 2013 |
| R.S.T. Property Company Ltd | Real estate | 2018 |
| R.Y.H. Management Company Limited | Households | 1976 |
| R1 Motorcycles Ltd | Wholesale & retail | 2017 |
| R2 Financial Assets Ltd | Administrative & support | 2023 |
| R4S 20 Ltd | Other services | 2025 |
| R5R Tyres and Wheels Limited | Manufacturing | 2018 |
| RA & Brothers Limited | Real estate | 2025 |
| RA Estates Ltd | Real estate | 2018 |
| RA Strategy Consulting Ltd | Professional & scientific | 2023 |
| RA Transfers and Logistics Ltd | Transport & logistics | 2024 |
| RAB One Consulting Limited | Professional & scientific | 2015 |
| Rabblesoft Ltd | Information & communication | 2021 |
| Rabid Films Ltd | Arts & recreation | 2019 |
| Racheal Manpower Solutions Ltd | Administrative & support | 2020 |
| Rachel's Beaut-Ique Ltd | Other services | 2023 |
| Rachella Limited | Health & social care | 2014 |
| Radcliffe Square Residents Association Limited | Households | 1959 |
| Radcom Solutions Limited | Hospitality | 2025 |
| Raddle Wharf Management Company Limited | Households | 1989 |
| Radford George Property Recruitment Ltd | Administrative & support | 2025 |
| Radford House Management Company Limited | Households | 2005 |
| Radha Krishna Healthcare Ltd | Health & social care | 2021 |
| Radha Krishna Investments Limited | Real estate | 2025 |
| Radha Wholesale Limited | Wholesale & retail | 2024 |
| Radiance Property Ltd | Real estate | 2017 |
| Radiantcrown Ltd | Other services | 2019 |
| Radically Reimagined Funding of Social Issues CIC | Administrative & support | 2026 |
| Radley Court (Selhurst) Management Company Limited | Households | 1985 |
| Radox Flat Roofing Ltd | Construction | 2022 |
| Rael Solutions Limited | Professional & scientific | 2008 |
| Raes Sweet-Spot Ltd | Manufacturing | 2022 |
| RAF Limited | Construction | 2007 |
| RAFAEL25 Ltd | Hospitality | 2024 |
| Raffles Aesthetics Ltd | Health & social care | 2025 |
| Rafnel Limited | Health & social care | 2013 |
| Raghav Limited | Wholesale & retail | 2010 |