| Q GAS (UK) Ltd | Professional & scientific | 2019 |
| Qarido Ltd | Wholesale & retail | 2021 |
| QED (Clacton) Holdings Limited | Financial services | 2003 |
| QED (Clacton) Limited | Administrative & support | 2003 |
| QED (Leeds) Holdings Limited | Administrative & support | 2003 |
| QED (Leeds) Limited | Administrative & support | 2003 |
| Quality CC Limited | Construction | 2014 |
| Quality Textures Limited | Construction | 1996 |
| Quill Contractors Limited | Construction | 2026 |
| Qwst Ltd | Professional & scientific | 2021 |
| R and D Elite Ltd | Construction | 2025 |
| R Coleman Construction Limited | Construction | 2023 |
| R Communications Ltd | Construction | 2025 |
| R Data Properties Limited | Real estate | 2022 |
| R Data Systems Ltd | Information & communication | 2017 |
| R J Holland Holdings (UK) Limited | Construction | 2014 |
| R J Holland Limited | Construction | 2003 |
| R J Rainbird Limited | Construction | 2012 |
| R Kemm Limited | Construction | 2006 |
| R V News & Wine Limited | Wholesale & retail | 2020 |
| R&P Short Roofing Limited | Construction | 2006 |
| RA Tiling Ltd | Construction | 2026 |
| RA Whitehead Limited | Hospitality | 2023 |
| Racdv Sales Limited | Wholesale & retail | 2014 |
| RAE Austin Limited | Real estate | 2025 |
| RAF Plumbing Heating and Property Services Limited | Construction | 2025 |
| Raffelecs Ltd | Construction | 2020 |
| Rajasavi Group Ltd | Wholesale & retail | 2022 |
| Ramas & Co Ltd | Construction | 2014 |
| Ramburg Limited | Manufacturing | 2000 |
| Rambus UK Ltd | Information & communication | 2019 |
| Rampion Extension Investco Limited | Financial services | 2020 |
| Rampion Extension Investco Parent Limited | Financial services | 2020 |
| Rampion Holdco Limited | Financial services | 2016 |
| Rampion Investco Limited | Financial services | 2016 |
| Rawlings Consultancy Limited | Construction | 2026 |
| Ray&Guard Limited | Administrative & support | 2022 |
| Rayanls Property Hub Ltd | Real estate | 2025 |
| RC Process Ltd | Professional & scientific | 2016 |
| RDB Capital Limited | Administrative & support | 2024 |
| Rdlc Consultants Ltd | Professional & scientific | 2024 |
| RDP Engage Limited | Construction | 2020 |
| Reachout Brighter Future Project Ltd | Health & social care | 2026 |
| Reality Surveying Limited | Professional & scientific | 2020 |
| Realmix Limited | Professional & scientific | 2007 |
| Recco - the Recruitment Co-Op LLP | | 2021 |
| Red Sea Development Limited | Real estate | 2019 |
| Redkube Limited | Information & communication | 2006 |
| Redmond Solutions Limited | Professional & scientific | 2013 |
| Reeves Additive Manufacturing Designs Ltd | Professional & scientific | 2020 |
| Refine Property Developers Limited | Real estate | 2000 |
| Reflections (Kent) Limited | Professional & scientific | 2015 |
| Regalia Homes Kent Limited | Construction | 2015 |
| Rehal Estates Limited | Real estate | 2018 |
| REI Services Group Ltd | Construction | 2021 |
| Reidemann Roofing Ltd | Construction | 2018 |
| Reliance Cleaning Limited | Administrative & support | 2018 |
| Renarde Consulting Ltd | Professional & scientific | 2023 |
| Repo Team Limited | Construction | 2019 |
| RES (Southern) Limited | Construction | 2013 |
| Resin Direct UK Limited | Construction | 2023 |
| Revamp Consulting Limited | Professional & scientific | 2019 |
| Revolve Global Ltd | Education | 2018 |
| Rfjs Trading Ltd | Wholesale & retail | 2025 |
| Rhalex UK Ltd | Wholesale & retail | 2018 |
| Riddingtons Payroll Ltd | Construction | 2023 |
| Rinstilant Limited | Professional & scientific | 2012 |
| Riplex Electrical Solutions Ltd | Construction | 2020 |
| River Quaggy Investments Limited | Construction | 2014 |
| Riverside Country Lodges Limited | Hospitality | 2024 |
| RK Drylining Team Ltd | Construction | 2016 |
| RK Group Solutions Ltd | Professional & scientific | 2026 |
| RMJ Clinical Solutions Limited | Professional & scientific | 2019 |
| RMJ Solutions Ltd | Construction | 2022 |
| RNH Electrical Limited | Manufacturing | 2018 |
| Roadrunner Holdings Limited | Construction | 2024 |
| Robert Hudson Security Consultancy Ltd | Financial services | 2025 |
| Robert James Jewellers Limited | Wholesale & retail | 2007 |
| Robina Court Residents Association Limited | Other services | 2001 |
| Rocha Print Solutions Limited | Information & communication | 2008 |
| Rodima Ltd | Arts & recreation | 2022 |
| Rogic Publishing Ltd | Information & communication | 2024 |
| Rohan & Mariyam Associates Ltd | Real estate | 2021 |
| Roofline Roof Restoration Limited | Construction | 2014 |
| Rooms to Grow Limited | Construction | 2019 |
| Roots Electrical Ltd | Construction | 2022 |
| Roots Estate Agents Ltd | Real estate | 2024 |
| Rosecroft 275 Ltd | Financial services | 2025 |
| Rosedale Holdings Limited | Real estate | 2021 |
| Rowan Properties (Kent) Limited | Construction | 2016 |
| Rowland Project Managers Limited | Professional & scientific | 2012 |
| Rowley & Associates Limited | Administrative & support | 2016 |
| Roxx Aesthetics Limited | Other services | 2020 |
| RR Lawton Limited | Construction | 2013 |
| RRP UK Consultancy Limited | Construction | 2009 |
| Rslh Trading Ltd | Wholesale & retail | 2026 |
| RT & B Limited | Hospitality | 2021 |
| Rtfc (Properties) Ltd | Real estate | 2017 |
| Rtfc Consulting Limited | Professional & scientific | 2007 |
| Ruan Limited | Construction | 2007 |