| Quick Enterprise Ltd | Wholesale & retail | 2026 |
| Quickgoods LLP | | 2025 |
| Quince Contracting Services Ltd | Administrative & support | 2021 |
| Quince Property and Holdings Ltd | Construction | 2025 |
| Quirky Boutique Ltd | Wholesale & retail | 2022 |
| R & a Trans Ltd | Transport & logistics | 2016 |
| R & J Trans (Glos) Limited | Transport & logistics | 2019 |
| R & L Roofing (East) Ltd | Construction | 2025 |
| R & S Barleytwist Ltd | Construction | 2017 |
| R & W Plant Sales Limited | Wholesale & retail | 2018 |
| R and M Holbeach Ltd | Real estate | 2024 |
| R B Wood & Weld Limited | Manufacturing | 2022 |
| R C Tinsley Worth's Ltd | Agriculture & fishing | 2021 |
| R Fire Protection Ltd | Other services | 2017 |
| R G Roofing South Ltd | Construction | 2026 |
| R H Developments (Boston) Limited | Construction | 2009 |
| R Hare Ltd | Construction | 2019 |
| R Hart Services Ltd | Administrative & support | 2018 |
| R J P Electrical Limited | Construction | 2005 |
| R J Wright (2006) Limited | Agriculture & fishing | 2006 |
| R K Wilson Builders (GR) Limited | Construction | 2024 |
| R K Wilson Builders (MSE) Limited | Construction | 2024 |
| R K Wilson Builders Limited | Construction | 2003 |
| R N Public House Limited | Hospitality | 2023 |
| R P Tinsley Farms Ltd | Agriculture & fishing | 2021 |
| R S D Commercial Limited | Financial services | 2007 |
| R Taylor Trees and Landscaping Ltd | Other services | 2011 |
| R V Electrical Services Limited | Professional & scientific | 2002 |
| R V Moat House Limited | Administrative & support | 2007 |
| R&L Roofing Ltd | Construction | 2025 |
| R&L Sports Turf Irrigation Ltd | Other services | 2022 |
| R&N Ltd | Administrative & support | 2024 |
| R&R Recycling Ltd | Water & waste | 2023 |
| R. C. Tinsley Limited | Agriculture & fishing | 1955 |
| R. J. Wright Limited | Agriculture & fishing | 2004 |
| R. S. Haulage (Lincs) Ltd | Transport & logistics | 2013 |
| R.A Hair Limited | Other services | 2025 |
| R.F. & P.M. Taylor Limited | Construction | 2003 |
| R.F. Welding Limited | Manufacturing | 2003 |
| R.G. Trans Ltd | Transport & logistics | 2024 |
| R.G.Barwell & Sons Limited | Agriculture & fishing | 1952 |
| R.I.M.A (Birmingham) Ltd | Transport & logistics | 2018 |
| R.J.Croot Carpentry & Joinery Limited | Manufacturing | 2023 |
| R.P.Worth & Son,Limited | Agriculture & fishing | 1952 |
| R.Spenceley Limited | Real estate | 1949 |
| R.T.G.M. Ltd | Manufacturing | 1997 |
| Rachvon Medicare Limited | Health & social care | 2026 |
| Radcor Ltd | Health & social care | 2021 |
| Radiomark Communications Limited | Administrative & support | 2015 |
| Radlis Ltd | Transport & logistics | 2018 |
| Radu Trans Ltd | Transport & logistics | 2014 |
| RAF Forest Ltd | Transport & logistics | 2026 |
| Rafa&Co Limited | Transport & logistics | 2011 |
| RAG Property Investments Limited | Real estate | 2024 |
| Rahand Barbers Ltd | Other services | 2026 |
| Rail Infrastructure Installation & Access Consultancy Ltd | Construction | 2023 |
| Railway (Boston) Limited | Hospitality | 2012 |
| Rainbow Cafe Limited | Arts & recreation | 1990 |
| Rajshakha Investments Ltd | Real estate | 2024 |
| Ralu Store Ltd | Wholesale & retail | 2024 |
| RAM Turkish Charcoal Grill Ltd | Hospitality | 2026 |
| Ramba Logistics Ltd | Transport & logistics | 2018 |
| Ranby's Corner Limited | Construction | 2024 |
| Rannoch Food Group Limited | Administrative & support | 2002 |
| Rannoch Food Holdings Limited | Professional & scientific | 2007 |
| Rannoch Top H Limited | Extraterritorial | 2020 |
| Rant & Ramble Ltd | Other services | 2026 |
| Rant Media (Spalding) Limited | Professional & scientific | 2014 |
| Rapid Giulesti Ltd | Administrative & support | 2016 |
| Rapid Roofing Services Ltd | Construction | 2025 |
| Rapidload Ltd | Manufacturing | 2021 |
| Raptors Dog Sports Ltd | Arts & recreation | 2023 |
| Rar-Recruitment Ltd | Transport & logistics | 2026 |
| Rares Gabriel Ltd | Transport & logistics | 2016 |
| Rares-Trans (Transport) Ltd | Transport & logistics | 2018 |
| Ratchet Engineering Ltd | Manufacturing | 2019 |
| Rawr! Creative Limited | Arts & recreation | 2016 |
| RAY Turner Energy Limited | Energy | 2014 |
| Rayane-Med Ltd | Professional & scientific | 2015 |
| Rayden TKR Ltd | Hospitality | 2023 |
| Raylee Group Ltd | Construction | 2022 |
| Rayman Barbers 2 Ltd | Other services | 2024 |
| Rayman Barbers Ltd | Other services | 2021 |
| Raymond Lydiard Food Services Limited | Manufacturing | 2003 |
| Raza MAR Ltd | Transport & logistics | 2025 |
| Razflo Ltd | Transport & logistics | 2024 |
| Razvan Trans Ltd | Transport & logistics | 2015 |
| Razvy Ltd | Transport & logistics | 2014 |
| Rbcd Ltd | Education | 2017 |
| RBM Agricultural Limited | Real estate | 1995 |
| RCC Educational Limited | Education | 2011 |
| RCF Contracting Ltd | Manufacturing | 2014 |
| RCJ Living Solutions Limited | Real estate | 2024 |
| RCJ Luxe Ltd | Other services | 2026 |
| RCK Event Management and Consultancy Ltd | Professional & scientific | 2024 |
| Rcrm Consulting Limited | Professional & scientific | 2012 |
| RDF T & R Ltd | Construction | 2019 |
| RDR Catering Service Ltd | Hospitality | 2025 |
| RDU Trans Limited | Transport & logistics | 2017 |
| RDX Driver Training Ltd | Education | 2024 |