| R & B Fitted Furniture Limited | Manufacturing | 2015 |
| R & I Marine Services Limited | Transport & logistics | 2017 |
| R & M Construction (Lincs) Ltd | Construction | 2019 |
| R & N Services Limited | Manufacturing | 1997 |
| R & R Seafoods Ltd | Wholesale & retail | 2013 |
| R & R Smokehouse Limited | Wholesale & retail | 2023 |
| R & S Spice Limited | Hospitality | 2019 |
| R a Snook Limited | Construction | 2016 |
| R and J Seafoods Ltd. | Manufacturing | 1999 |
| R Blyth Engineering Limited | Professional & scientific | 2026 |
| R C Lincolnshire Ltd | Administrative & support | 2011 |
| R Carey & Sons Limited | Real estate | 2024 |
| R D a L Holdings Ltd | Financial services | 2018 |
| R D H Engineering Limited | Construction | 2002 |
| R D S Kevin Ltd. | Transport & logistics | 2013 |
| R Family School of Arts & Culture Ltd | Manufacturing | 2026 |
| R G Motor Services Ltd | Wholesale & retail | 2009 |
| R H Consultancy (GY) Limited | Professional & scientific | 2024 |
| R J Stanley Consulting Limited | Administrative & support | 2013 |
| R Jagadish Limited | Health & social care | 2007 |
| R M Building Services East Anglian Ltd | Construction | 2013 |
| R Matthews Carpentry Limited | Manufacturing | 2017 |
| R Millar Ltd | Professional & scientific | 2026 |
| R R Engineering Support and Car Sales Ltd | Construction | 2026 |
| R S Baxter & Associates Limited | Construction | 2016 |
| R S Pubco Ltd | Hospitality | 2025 |
| R S Walker Road Haulage Limited | Transport & logistics | 2007 |
| R S Wall and Floor Tiling Ltd | Construction | 2023 |
| R Thornton & Associate Trust Limited | Financial services | 2024 |
| R Vauvert Property Services Limited | Construction | 2014 |
| R W G B Associates Limited | Health & social care | 2018 |
| R&D Mechanical Consultants Limited | Professional & scientific | 2024 |
| R&D Trans 2024 Ltd | Transport & logistics | 2024 |
| R&M Collective Ltd | Manufacturing | 2025 |
| R&M Property Services Limited | Construction | 2025 |
| R-Lec Electrical Services Ltd | Construction | 2024 |
| R. D. L. Engineering Limited | Professional & scientific | 1997 |
| R. Dixon Plumbing & Heating Limited | Construction | 2025 |
| R. J. Wall Plumbing & Heating Limited | Construction | 2006 |
| R. J. Walsh Roofing Ltd | Construction | 2015 |
| R. K. Upvc Window Repairs Limited | Construction | 2015 |
| R. MAY Residential Holdings Ltd | Real estate | 2025 |
| R. S. Walker Limited | Wholesale & retail | 2003 |
| R. Ward Construction Ltd | Construction | 2017 |
| R.A.C. Enterprises Ltd | Information & communication | 2012 |
| R.Caudwell(Produce)Limited | Agriculture & fishing | 1964 |
| R.I.C. Healthcare Ltd | Health & social care | 2017 |
| R.O.H Electrical Services Ltd | Construction | 2024 |
| R.P. Business Forms Limited | Manufacturing | 1973 |
| R2O Cars Derbyshire Ltd | Wholesale & retail | 2024 |
| RA Design Consultancy Limited | Professional & scientific | 2020 |
| RA Thompson Limited | Construction | 2022 |
| RAA Pred Ltd | Transport & logistics | 2023 |
| Racecraft Motorsport Promotion Ltd | Arts & recreation | 2019 |
| Rachel Davidson Mortgages Ltd | Financial services | 2022 |
| Radbourne Construction Ltd | Construction | 2014 |
| Radu Ionut Transport Ltd | Transport & logistics | 2025 |
| Ragged Edge Consulting Limited | Professional & scientific | 2000 |
| Ragged Edge Recruitment Limited | Administrative & support | 2019 |
| Rainbow Corner Day Nursery Limited | Other services | 2004 |
| Rainbow Wizard Productions Ltd | Extraterritorial | 2014 |
| Rainier Resources Ltd | Financial services | 2025 |
| RAMALHO28 Ltd | Transport & logistics | 2025 |
| Ramask Investments Ltd | Other services | 2019 |
| Rameco Ltd | Construction | 2017 |
| Ramekitchen Ltd | Hospitality | 2025 |
| Ramsden Business Services Holding Company Limited | Financial services | 2012 |
| Ramsden's Business Services Limited | Professional & scientific | 1984 |
| Ramus (Grimsby) Ltd | Manufacturing | 2024 |
| Ramus (Trading) Ltd | Hospitality | 2024 |
| Ramyar UK Barber Ltd | Other services | 2025 |
| Ranya Star Ltd | Information & communication | 2025 |
| Rapdarn Holdings Ltd | Real estate | 2019 |
| Rapid Collections Limited | Other services | 2018 |
| Rapid Group Services Limited | Manufacturing | 2020 |
| Rapid Hire Limited | Administrative & support | 2020 |
| Rapid Office Equipment (Grimsby) Limited | Wholesale & retail | 2008 |
| Rapid Travel Holdings Limited | Administrative & support | 2024 |
| Rapide F S Limited | Construction | 2017 |
| RAS Energy Ltd | Construction | 2025 |
| RAS Mechanical and Electrical Ltd | Construction | 2019 |
| Rase Outdoor Living Ltd | Construction | 2018 |
| Rasp Limited | Wholesale & retail | 2006 |
| Rate Sync Ltd | Information & communication | 2024 |
| Raven Roofing & Repairs Ltd | Construction | 2012 |
| RAW Vanilla Books Limited | Arts & recreation | 2018 |
| Raw's Best Limited | Wholesale & retail | 2014 |
| Rawcliffe Solutions Ltd | Professional & scientific | 2025 |
| Rawson Haulage Limited | Transport & logistics | 2013 |
| RAY Rountree (Waltham) Limited | Extraterritorial | 2012 |
| Ray's Auto Services Ltd | Wholesale & retail | 2013 |
| Raylec Controls Ltd | Construction | 2024 |
| Raymond Barker (New Waltham) Limited | Financial services | 1970 |
| Rayning Data Limited | Information & communication | 2011 |
| Rayprime Limited | Information & communication | 2000 |
| RB Current Ltd | Energy | 2026 |
| RB Food Integrity Ltd | Professional & scientific | 2018 |
| RBB Construction Solutions Limited | Construction | 2025 |
| RBP Holdings Limited | Professional & scientific | 2008 |
| RC Stratford Debt LLP | | 2017 |