| Rewards Direct Ltd | Wholesale & retail | 2022 |
| Rewild Bake Limited | Manufacturing | 2015 |
| Rewilding Solutions Ltd | Water & waste | 2019 |
| Rewire to Revive Ltd | Other services | 2023 |
| Rexluxa UK Ltd | Wholesale & retail | 2017 |
| Rexpire Co Limited | Professional & scientific | 2025 |
| Rexus Studios Ltd | Wholesale & retail | 2026 |
| REY DEL Cerdo Ltd | Hospitality | 2019 |
| REY Salon Ltd | Other services | 2024 |
| Reyal Limited | Health & social care | 2019 |
| Reydon Blackmore Limited | Construction | 2013 |
| Reynard Consulting Ltd | Construction | 2010 |
| Reynolds Confidential Limited | Administrative & support | 2008 |
| Reynolds Electrical Solutions Ltd | Construction | 2025 |
| Reynolds Management Limited | Professional & scientific | 2020 |
| Reynolds ST Development Ltd | Real estate | 2019 |
| REZ Solutions Group Ltd | Administrative & support | 2025 |
| Reza Auto Ltd | Administrative & support | 2015 |
| Rezell Ltd | Wholesale & retail | 2015 |
| Rezixe Ltd | Wholesale & retail | 2025 |
| Rezzolute Ltd | Professional & scientific | 2018 |
| RF Business Solutions Ltd | Professional & scientific | 2014 |
| RF Hire Ltd | Construction | 2021 |
| RF Movements Ltd | Transport & logistics | 2020 |
| RF1 Property Limited | Real estate | 2017 |
| RF2 Properties Limited | Households | 2018 |
| RF2MICROWAVE Solutions Ltd | Information & communication | 2014 |
| RFA (Penistone) Limited | Professional & scientific | 1984 |
| RFA - Tech Ltd | Manufacturing | 1977 |
| RFA Inspections Ltd | Public administration | 2016 |
| RFA Systems Limited | Manufacturing | 1978 |
| RFB Specialist Contractors Limited | Construction | 2018 |
| Rfbu (Holdings) Limited | Financial services | 2023 |
| Rfid Consortium Ltd | Professional & scientific | 2017 |
| RFP Architects Ltd | Construction | 2018 |
| RFP Developments Ltd | Financial services | 2022 |
| RFP Group Ltd | Financial services | 2022 |
| RFP Investments Ltd | Construction | 2019 |
| RFR DB Ltd | Construction | 2024 |
| RG Bartlett Construction Limited | Construction | 2020 |
| RG Bartlett Holdings Limited | Financial services | 2022 |
| RG Bartlett Properties Limited | Real estate | 2022 |
| RG Design and Developments Ltd | Other services | 2025 |
| RG Motor Sales Limited | Extraterritorial | 2017 |
| RG Plastering & Building Limited | Construction | 2023 |
| RG QS Services Limited | Professional & scientific | 2018 |
| RG Security Services Ltd | Administrative & support | 2025 |
| RG Technologies Ltd | Transport & logistics | 2023 |
| RG8 Limited | Professional & scientific | 2017 |
| RGA Drylining Ltd | Construction | 2018 |
| Rgbarg Ltd | Construction | 2021 |
| Rggilbert Ltd | Information & communication | 2020 |
| Rghf Properties Limited | Real estate | 2021 |
| Rgifts Limited | Wholesale & retail | 2014 |
| RGJ Rail Ltd | Construction | 2019 |
| RGK Developments Ltd | Construction | 2019 |
| RGL Inc Ltd | Other services | 2016 |
| RGM Pearly White Ltd | Health & social care | 2024 |
| RGO AM Ltd | Wholesale & retail | 2025 |
| RGR Property Developments Limited | Real estate | 2024 |
| RGR Signs Limited | Wholesale & retail | 2026 |
| Rgth Property Limited | Real estate | 2026 |
| Rgwyn Ltd | Health & social care | 2022 |
| Rgzg Ltd | Arts & recreation | 2019 |
| RH Consultancy Services Limited | Professional & scientific | 2023 |
| RH Fire & Security Solutions Ltd | Construction | 2020 |
| RH Nextlevel Ltd | Information & communication | 2025 |
| RH Seel & Co Limited | Real estate | 2012 |
| RH SH Group Ltd | Hospitality | 2025 |
| RH Smith Associates Ltd | Professional & scientific | 2025 |
| RH2 2018 CYF | Hospitality | 2018 |
| Rhagori Ltd | Education | 2019 |
| RHD QA Limited | Financial services | 2013 |
| RHD QCA Limited | Financial services | 2022 |
| Rhedyn Consulting Limited | Administrative & support | 2021 |
| Rheh Holdings Limited | Financial services | 2024 |
| Rhema Church CIC | Education | 2024 |
| Rheml CYF | Arts & recreation | 2023 |
| Rhetorik Clothing Ltd | Wholesale & retail | 2018 |
| RHG Catering Limited | Hospitality | 2016 |
| Rhi's Aesthetics Ltd | Other services | 2024 |
| Rhiannon J Limited | Manufacturing | 2008 |
| Rhian’S Childminding Ltd | Health & social care | 2023 |
| Rhicol Limited | Administrative & support | 2012 |
| Rhigos Bess Limited | Energy | 2023 |
| Rhijo Limited | Construction | 2013 |
| Rhimic Limited | Information & communication | 2024 |
| Rhinas Brickwork Ltd | Construction | 2019 |
| Rhino Car Sales Ltd | Wholesale & retail | 2025 |
| Rhino Fire and Security Systems Ltd | Administrative & support | 2018 |
| Rhino Global Limited | Wholesale & retail | 2010 |
| Rhino Hydraulic Services Limited | Wholesale & retail | 2023 |
| Rhinoceros Group Ltd | Transport & logistics | 2019 |
| Rhippin-Ddu Limited | Agriculture & fishing | 2007 |
| Rhiwbina Dental Surgery Limited | Health & social care | 2009 |
| Rhiwbina GAS Service Limited | Construction | 2026 |
| Rhiwbina Heating & Plumbing Limited | Construction | 2005 |
| Rhiwbina Refill Ltd | Wholesale & retail | 2026 |
| Rhiwbina Rugby Football Club Ltd | Arts & recreation | 2023 |
| Rhiwbina Service Centre Limited | Wholesale & retail | 2025 |