| Quikstock Ltd | Information & communication | 2025 |
| Quittenton and Salter Ltd | Administrative & support | 2022 |
| Quora (Codnor) Limited | Construction | 2016 |
| Quora (Didcot) Limited | Construction | 2021 |
| Quora (JV) Limited | Construction | 2020 |
| Quora (Telford) Limited | Construction | 2021 |
| Quora (WB) Limited | Construction | 2012 |
| Quora Limited | Construction | 2009 |
| Qvanthum-Cx Limited | Information & communication | 2020 |
| R & E a Developments (2023) Ltd | Other services | 2023 |
| R & E a Developments 23 Unlimited | Professional & scientific | 2023 |
| R & E a Dorco Unlimited | Extraterritorial | 2024 |
| R & E Construction (Lincoln) Limited | Construction | 2019 |
| R & J Property Rentals Ltd | Real estate | 2022 |
| R & J'S Bodyshop Ltd | Wholesale & retail | 2022 |
| R & M Roofing Ltd | Construction | 2019 |
| R a Joinery & Construction Ltd | Construction | 2014 |
| R C Todd Ltd | Other services | 2013 |
| R Champion Ltd | Construction | 2017 |
| R D B Engineering Limited | Construction | 2001 |
| R D Ellis Ltd | Health & social care | 2017 |
| R Derbicz Holdings Ltd | Financial services | 2020 |
| R F Walshaw & Company Limited | Agriculture & fishing | 1953 |
| R G Booth Ltd | Construction | 2026 |
| R G Transporting Limited | Transport & logistics | 2018 |
| R G Wright Builder Ltd | Construction | 2012 |
| R H Displays & Exhibitions Ltd | Administrative & support | 2012 |
| R H Milner Ltd | Health & social care | 2010 |
| R Haresign Services Ltd | Wholesale & retail | 2025 |
| R Hegab Trading & Investment Ltd | Wholesale & retail | 2024 |
| R Hinman Property Limited | Administrative & support | 2018 |
| R Iley Driving Services Ltd | Transport & logistics | 2013 |
| R J Chambers Limited | Construction | 2006 |
| R J Hartley Driving Ltd | | 2013 |
| R J Krysztopik Ltd | Health & social care | 2018 |
| R J Laskey Joinery Limited | Construction | 2007 |
| R K Civils Limited | Construction | 2020 |
| R M Bradford Ltd | Information & communication | 2016 |
| R M Grocott-Mason Ltd | Health & social care | 2010 |
| R M O Ltd | Extraterritorial | 2000 |
| R M Overton Ltd | Extraterritorial | 2000 |
| R M Pollard Ltd | Professional & scientific | 2020 |
| R Mason Construction Ltd | Construction | 2019 |
| R N Catering (Lincoln) Limited | Hospitality | 2018 |
| R P Property Works Ltd | Real estate | 2025 |
| R Ragoowansi Medico-Legal Ltd | Professional & scientific | 2022 |
| R S Air Ltd | Manufacturing | 2020 |
| R S Orthopaedics Limited | Health & social care | 2019 |
| R S Planer Hire Limited | Administrative & support | 2018 |
| R Smith Decorating Limited | Construction | 2019 |
| R Thorne Logistics Limited | Transport & logistics | 2024 |
| R Toyne Haulage Ltd | Transport & logistics | 2011 |
| R W Pinkett Building Contractors Limited | Administrative & support | 2018 |
| R Wakefield Building Limited | Construction | 2022 |
| R&D Tiling Limited | Construction | 2023 |
| R&E Rental Properties Ltd | Real estate | 2025 |
| R&G Logistics Limited | Transport & logistics | 2025 |
| R&M Lincs Ltd | Hospitality | 2025 |
| R-Line Interiors Ltd | Construction | 2026 |
| R-Tec Joinery Ltd | Manufacturing | 2019 |
| R. Griffiths Properties Ltd | Real estate | 2024 |
| R. Wray & Sons Limited | Agriculture & fishing | 2014 |
| R.A. Johnson & SON Ltd | Construction | 2003 |
| R.B.B.Properties(Slough)Limited | Administrative & support | 1961 |
| R.F. Lincs Limited | Information & communication | 1995 |
| R.G.Hairsine Limited | Agriculture & fishing | 1962 |
| R.H. Ward (Welton) Limited | Agriculture & fishing | 1959 |
| R.Parsons Limited | Agriculture & fishing | 1958 |
| R.S. Fowkes Limited | Agriculture & fishing | 1956 |
| R.W.Stokes & Sons,Limited | Manufacturing | 1937 |
| R2 Property Company Limited | Real estate | 1970 |
| R20 Services Ltd | Construction | 2022 |
| R2D2 Property Limited | Real estate | 2024 |
| R5 Air Displays Limited | Arts & recreation | 2017 |
| RA 2047 Investments Limited | Hospitality | 2023 |
| RA Fawcett Engineering Services Ltd | Professional & scientific | 2024 |
| Rabeto Holdings Limited | Financial services | 2024 |
| Rabeto Homes Limited | Construction | 2025 |
| Rabeto Limited | Professional & scientific | 2024 |
| Race Performance Limited | Wholesale & retail | 2019 |
| Race Tech Engineering Ltd | Wholesale & retail | 2025 |
| Rachel FOX Forensic Psychotherapy Services Ltd | Health & social care | 2024 |
| Rachel Green Coach & Consult Ltd | Professional & scientific | 2020 |
| Rachel London Photography Ltd | Professional & scientific | 2018 |
| Rack and Arrow Youth Academy C.I.C. | Education | 2026 |
| Radial Automotive UK Buyer Ltd | Financial services | 2024 |
| Radial Automotive UK Holding Company Ltd | Financial services | 2024 |
| Radial Automotive UK Intermediate Ltd | Financial services | 2024 |
| Radial Joinery Manufacturing Ltd | Manufacturing | 2020 |
| Radicle Ltd | Wholesale & retail | 2017 |
| Radley Footwear Limited | Wholesale & retail | 1982 |
| Radtab Limited | Construction | 1989 |
| Ragazzi Clothing Ltd | Wholesale & retail | 2024 |
| Rags Lincoln Ltd | Wholesale & retail | 2013 |
| Railtimes (Holdings) Limited | Arts & recreation | 1995 |
| Railtimes Limited | Extraterritorial | 1978 |
| Rain & Root Landscaping & Construction Ltd | Administrative & support | 2026 |
| Rain Dance Investments Limited | Professional & scientific | 2009 |
| Rainfall Games Limited | Information & communication | 2020 |
| Raisin OM Ltd | Construction | 2020 |