| Quiet Canvas Media Limited | Wholesale & retail | 2026 |
| Quietly Grow Ltd | Professional & scientific | 2026 |
| Quill and Vellum Ltd | Information & communication | 2025 |
| Quilva Ltd | Information & communication | 2026 |
| Quoin Environmental Developments Limited | Construction | 2001 |
| QURESHFARM2020 Ltd | Health & social care | 2020 |
| Quvase Limited | Wholesale & retail | 2002 |
| QW Properties Limited | Construction | 2019 |
| R & D Designing Ltd | Professional & scientific | 2024 |
| R & H Architecture Limited | Professional & scientific | 2011 |
| R & N Roofing Limited | Construction | 2023 |
| R & R Threading and Beauty Ltd | Other services | 2026 |
| R & S Repairs and Maintenance Ltd | Manufacturing | 2018 |
| R & T Apparell Limited | Wholesale & retail | 2011 |
| R & V Property Holdings Limited | Financial services | 2023 |
| R & W Accountants Ltd | Professional & scientific | 2012 |
| R B Electrical (London) Limited | Construction | 2025 |
| R B Electrical (Peterborough) Limited | Construction | 2010 |
| R G Lickerish Limited | Administrative & support | 2010 |
| R G Psychology Ltd | Education | 2023 |
| R Groves Transport Services Limited | Transport & logistics | 2015 |
| R H Motors Specialist Ltd | Wholesale & retail | 2025 |
| R HUQ & Co Limited | Real estate | 2012 |
| R Kular Private Limited | Health & social care | 2025 |
| R Lala Construction Ltd | Construction | 2025 |
| R M Clutch and Gearbox Limited | Wholesale & retail | 2013 |
| R Mitchell Courier Ltd | Transport & logistics | 2018 |
| R Mutimer Haulage Ltd | Transport & logistics | 2015 |
| R N Motors Ltd. | Wholesale & retail | 1994 |
| R P C M Limited | Administrative & support | 2007 |
| R P Logistics Limited | Transport & logistics | 2013 |
| R Samuel& Co Ltd | Professional & scientific | 2020 |
| R Shar Limited | Health & social care | 2008 |
| R Socius LLP | | 2024 |
| R T Anton Ltd | Construction | 2003 |
| R&E Accommodation Ltd | Real estate | 2023 |
| R&E Logistics Ltd | Transport & logistics | 2025 |
| R&G Trans Services Ltd | Transport & logistics | 2023 |
| R&Jtrafford Consulting Ltd | Manufacturing | 2018 |
| R&L Best Foods Ltd | Hospitality | 2024 |
| R&L Ventures Limited | Wholesale & retail | 2023 |
| R&M Haulage Ltd | Transport & logistics | 2019 |
| R&M Housing Solutions Limited | Real estate | 2025 |
| R&R Equity Limited | Real estate | 2025 |
| R&R Windows Supply Ltd | Wholesale & retail | 2025 |
| R&S Trans Services Ltd | Transport & logistics | 2025 |
| R&S Village Stores Limited | Wholesale & retail | 2018 |
| R-Tral Ltd | Transport & logistics | 2026 |
| R. a. Wood Plumbing and Heating Ltd | Construction | 2023 |
| R. Howard Limited | Manufacturing | 2002 |
| R. J. Berry (Thorney) Limited | Agriculture & fishing | 1944 |
| R. Mehmi Construction & Services Ltd | Construction | 2022 |
| R. Perkins and Sons Limited | Professional & scientific | 1945 |
| R. Stahl Limited | Manufacturing | 1972 |
| R.A. Baker Glaziers and Merchants Limited | Manufacturing | 2002 |
| R.A.M.S. Transport Ltd | Wholesale & retail | 2015 |
| R.B.Lamar Trans&Road Courier Ltd | Transport & logistics | 2025 |
| R.C.Eayrs Limited | Agriculture & fishing | 1952 |
| R.G. Jarrett Limited | Wholesale & retail | 1985 |
| R.H.Waterworth Limited | Agriculture & fishing | 1960 |
| R.J. Sutton Engineering Limited | Manufacturing | 2004 |
| R.J.Everett Limited | Manufacturing | 2019 |
| R.M. Sheehan Plumbing & Heating Ltd | Construction | 2013 |
| R.M.C (Peterborough) Ltd | Construction | 2012 |
| R.N. Hartzenberg Limited | Health & social care | 2009 |
| R.N.I.D. Activities Limited | Administrative & support | 1967 |
| R.T.M Roofing Specialist Ltd | Construction | 2014 |
| R.W Concrete Pumping Ltd | Construction | 2021 |
| R.Westcott Limited | Health & social care | 2018 |
| R2 Catering Ltd | Hospitality | 2018 |
| R2S (U.K) Limited | Wholesale & retail | 2017 |
| RA & K Ltd | Transport & logistics | 2026 |
| RA Housing Ltd | Real estate | 2023 |
| Ra&K Haulage Ltd | Transport & logistics | 2019 |
| Raaa Cars Limited | Wholesale & retail | 2025 |
| Raaams Consult Ltd | Professional & scientific | 2022 |
| Raadl Group Ltd | Manufacturing | 2021 |
| Rabh Holdings Limited | Professional & scientific | 2019 |
| Racetorx Limited | Manufacturing | 2016 |
| Racing Aspirations Limited | Professional & scientific | 2014 |
| Rack N Rail Ltd | Manufacturing | 2024 |
| Racos Transport Ltd | Transport & logistics | 2022 |
| Radema Ltd | Transport & logistics | 2022 |
| Radha Krishna & Family (Hampton) Ltd | Real estate | 2024 |
| Radha Krishna & Family (Peterborough) Ltd | Hospitality | 2024 |
| Radha Krishna & Family Ltd | Professional & scientific | 2023 |
| Radiant Cleaning Team Ltd | Administrative & support | 2025 |
| Radiant Heating Solutions Limited | Construction | 2001 |
| Radiant Skin Clinic Limited | Other services | 2023 |
| Radical Health Care Services Ltd | Health & social care | 2018 |
| Radical Motorsport Limited | Manufacturing | 1997 |
| Radical Performance Engines Limited | Wholesale & retail | 2004 |
| Radical Precision Engineering Limited | Manufacturing | 2001 |
| Radical Products Limited | Extraterritorial | 2014 |
| Radical Products UK Limited | Extraterritorial | 1996 |
| Radical Sportscars Limited | Financial services | 2011 |
| Radmac Vinyl Film Wrapping Ltd | Wholesale & retail | 2021 |
| Radu SF Ltd | Transport & logistics | 2025 |
| Radu Transport Services Ltd | Transport & logistics | 2025 |
| Radun Ltd | Construction | 2020 |