| RA Duffus Ltd | Financial services | 2025 |
| Racing Snake Ltd | Information & communication | 2025 |
| RAD Buliders Ltd | Construction | 2020 |
| RAD Medical Services Limited | Health & social care | 2024 |
| RAF Solid Renovation Ltd | Manufacturing | 2024 |
| Raff Limited | Real estate | 2006 |
| Ragazzi Limited | Wholesale & retail | 2004 |
| Rakibs Eatery Ltd | Hospitality | 2019 |
| RAM Leisure & Workwear Limited | Manufacturing | 1995 |
| Rambox Ltd | Arts & recreation | 2024 |
| Ramear Superstore Limited | Wholesale & retail | 2023 |
| Ramko Ltd | Health & social care | 2013 |
| Rampant Dragon Limited | Real estate | 2004 |
| Randall Building Services Limited | Construction | 2016 |
| Rang Rasoii Limited | Hospitality | 2025 |
| Range Bay Limited | Manufacturing | 2011 |
| Range Fabrications Limited | Manufacturing | 2014 |
| Range Solutions Limited | Manufacturing | 2010 |
| RAO Asmad Limited | Wholesale & retail | 2026 |
| Rapha Mind Care Ltd | Education | 2025 |
| Rareplants Limited | Extraterritorial | 2000 |
| Rasv Services Ltd | Administrative & support | 2026 |
| Ratedjoiners Ltd | Construction | 2015 |
| Raven Joinery Limited | Construction | 2014 |
| RAW Bite Ltd | Financial services | 2025 |
| RAW Corporation Limited | Wholesale & retail | 2020 |
| RAW Traffic Data Solutions Limited | Professional & scientific | 2019 |
| Rawbella Ltd | Other services | 2025 |
| Rawson Digital Ltd | Wholesale & retail | 2012 |
| Rawson Evpower Limited | Wholesale & retail | 2020 |
| Rawson Property Ltd | Real estate | 2020 |
| RAY M/C Turwiz Ltd | Professional & scientific | 2021 |
| Razor Technologies Limited | Professional & scientific | 2004 |
| Razzamataz Theatre Arts Mena Ltd | Arts & recreation | 2026 |
| Razzamataz Theatre Schools Limited | Arts & recreation | 2002 |
| RCJ Holdings Limited | Professional & scientific | 2008 |
| RCL Catering Ltd | Hospitality | 2020 |
| Rcms Trading Limited | Administrative & support | 2020 |
| RD Products Limited | Wholesale & retail | 2026 |
| RDI (UK) Holdings Limited | Other services | 2012 |
| Re-Heat Solutions Ltd | Construction | 2022 |
| RE: Website Ltd | Information & communication | 2024 |
| Reach Homes Ltd | Real estate | 2025 |
| Reactivate Limited | Arts & recreation | 1996 |
| Read Construction UK Limited | Financial services | 2018 |
| Reads Flooring Ltd | Construction | 2019 |
| Real Law Solicitors Limited | Professional & scientific | 2010 |
| Realm WXM Limited | Construction | 2015 |
| Rebecca Dakin Limited | Administrative & support | 2001 |
| Reclock Limited | Health & social care | 2014 |
| Recycle Investments Limited | Financial services | 2024 |
| Red Beast Limited | Manufacturing | 2021 |
| Red Dragon's Vault Ltd | Wholesale & retail | 2024 |
| Red FOX Field & Bushcraft Ltd | Agriculture & fishing | 2021 |
| Red Giant Computers Ltd | Information & communication | 2018 |
| Redbrook Day Nursery Limited | Health & social care | 2014 |
| Redchilli Services Limited | Hospitality | 2024 |
| Rednal Racing Ltd | Arts & recreation | 2007 |
| Redwither Holdings Limited | Real estate | 2020 |
| Reef Tickets Ltd | Administrative & support | 2021 |
| Reflex Health Care Ltd | Health & social care | 2022 |
| Refocus Therapy Ltd | Health & social care | 2021 |
| Reformation.Is Ltd | Manufacturing | 2012 |
| Regent Pizza Limited | Hospitality | 2023 |
| Regscript Developments Ltd | Information & communication | 2023 |
| Rehabilitation Specialists Ltd | Health & social care | 2016 |
| Reilly's Building Services Limited | Construction | 2017 |
| Relicon Limited | Information & communication | 2010 |
| Remotetco Ltd | Administrative & support | 2025 |
| Rent Ease Property Ltd | Construction | 2024 |
| Rentflow Properties Ltd | Real estate | 2025 |
| Rentify Properties NW Ltd | Real estate | 2026 |
| Reproduction Connect Ltd | Transport & logistics | 2022 |
| Restore Team Ltd | Administrative & support | 2019 |
| Reticent Digital Solutions Ltd | Information & communication | 2019 |
| Reticent Property Company Ltd | Real estate | 2022 |
| Retigo UK Ltd | Manufacturing | 2020 |
| Retro Noodle Limited | Wholesale & retail | 2024 |
| Revelcmoney Limited | Other services | 2022 |
| Reviverejuvenate Ltd | Health & social care | 2026 |
| Revolution Buildings Ltd | Real estate | 2018 |
| Reyton Wire Limited | Wholesale & retail | 2002 |
| RFN Properties Limited | Real estate | 2020 |
| RG Joinery & Plastering Services Ltd | Construction | 2021 |
| RG M&E Management Limited | Professional & scientific | 2011 |
| RH Transport Services Ltd | Transport & logistics | 2021 |
| RHD Holdco Limited | Financial services | 2022 |
| Rheyrap Limited | Health & social care | 2021 |
| Rhian Jennifer Consulting Ltd | Administrative & support | 2024 |
| Rhino Industrial Flooring Ltd | Construction | 2025 |
| Rhkoncepts Ltd | Professional & scientific | 2026 |
| Rhodeworks Ltd | Professional & scientific | 2013 |
| Rhos Ddigre Limited | Agriculture & fishing | 2021 |
| Rhos MOT and Service Centre Ltd | Wholesale & retail | 2017 |
| Rhos Y Coed Farm Ltd | Construction | 2017 |
| Rhosddu Carpets Limited | Extraterritorial | 2020 |
| Rhosddu Properties Limited | Extraterritorial | 2017 |
| Rhostyllen Barbers Clwyd Limited | Other services | 2024 |
| Rhostyllen Football Club Limited | Arts & recreation | 2020 |
| Rhosyn Ddraig Group Limited | Financial services | 2025 |