| Riverdale House Management Company Ltd | Households | 2021 |
| Riverflat Limited | Real estate | 2004 |
| Riverlobster Limited | Construction | 2017 |
| Riverlution by RSC CIC | Education | 2022 |
| Rivermap AI Solutions Ltd | Information & communication | 2025 |
| Riverside Automation Group Limited | Professional & scientific | 2013 |
| Riverside Chippy Limited | Hospitality | 2026 |
| Riverside Court Apartments (Yorkshire) Limited | Real estate | 2014 |
| Riverside Fayre Ltd | Hospitality | 2021 |
| Riverside Mobility Bathrooms Ltd | Construction | 2024 |
| Riverside Solicitors Ltd | Professional & scientific | 2026 |
| Riverside Spice (S60) Ltd | Hospitality | 2019 |
| Riverside Storage Limited | Administrative & support | 2009 |
| Riviera Apartments Limited | Real estate | 2006 |
| Riwco Limited | Professional & scientific | 2012 |
| Rix-Tools UK Limited | Wholesale & retail | 1994 |
| Rixify Ltd | Wholesale & retail | 2024 |
| Rixil Holdings Limited | Other services | 2025 |
| Rixil Services Limited | Professional & scientific | 2008 |
| Riya SRI Ltd | Wholesale & retail | 2016 |
| Rize Blue Ltd | Construction | 2024 |
| Rize Construction Ltd | Construction | 2015 |
| Rize Holdings Ltd | Construction | 2017 |
| Rizmart Ltd | Wholesale & retail | 2023 |
| Rizvi & Son’S Ltd | Hospitality | 2026 |
| Rizzin Ltd | Wholesale & retail | 2015 |
| Rizzoli Limited | Hospitality | 2012 |
| Rizzy Holdings Limited | Wholesale & retail | 2024 |
| RJ Physical Care UK Ltd | Hospitality | 2013 |
| RJ Therapies Ltd | Health & social care | 2025 |
| RJA Learning Ltd | Information & communication | 2012 |
| RJB Capital Ltd | Other services | 2021 |
| RJB Sport, Leisure and Tourism Consulting Ltd | Professional & scientific | 2018 |
| Rjbell Properties Ltd | Administrative & support | 2020 |
| RJC Autos Ltd | Wholesale & retail | 2023 |
| RJD Development Services Ltd | Administrative & support | 2022 |
| Rjed Trading Ltd | Wholesale & retail | 2017 |
| Rjhahs Trading Limited | Wholesale & retail | 2025 |
| RJJ Tattoo Limited | Other services | 2022 |
| RJL Catering Consultancy Ltd | Hospitality | 2018 |
| RJM Carpentry and Building Ltd | Manufacturing | 2022 |
| RJM Commercial Properties Ltd | Real estate | 2022 |
| RJM Engineering Ltd | Professional & scientific | 2020 |
| RJM Heat Services Limited | Wholesale & retail | 2006 |
| RJM Properties (South Yorkshire) Ltd | Real estate | 2025 |
| Rjms Business Services Ltd. | Professional & scientific | 2003 |
| Rjms Enterprises Ltd | Administrative & support | 2024 |
| Rjms Professionals Ltd | Extraterritorial | 2010 |
| RJN Financial Planning Ltd | Professional & scientific | 2024 |
| RJS Fisheries Ltd | Hospitality | 2026 |
| RJS Joinery & Building Services Limited | Construction | 2011 |
| RJT Lettings Ltd | Real estate | 2023 |
| RJT Locums Ltd | Health & social care | 2014 |
| RJW Business Solutions Ltd | Other services | 2012 |
| RK Premium Property Ltd | Real estate | 2024 |
| RK876 Ltd | Hospitality | 2022 |
| Rkay Powersports Ltd | Wholesale & retail | 2023 |
| RKB Crop Consultancy Limited | Agriculture & fishing | 2019 |
| RKC Building Ltd | Construction | 2026 |
| Rkfpubs Limited | Hospitality | 2025 |
| RKM Grab Hire and Haulage Ltd | Transport & logistics | 2021 |
| RKN Property Ltd | Administrative & support | 2025 |
| RKS Recycling Ltd | Water & waste | 2026 |
| Rktekt Consulting Limited | Professional & scientific | 2023 |
| RKW Property Developments Ltd | Real estate | 2023 |
| RKY Foods Ltd | Wholesale & retail | 2019 |
| RL Aesthetics Limited | Other services | 2025 |
| RL Boxing Management & Promotions Ltd | Arts & recreation | 2025 |
| RL PUB Management Ltd | Hospitality | 2024 |
| RLA Dance Company Limited | Education | 2015 |
| RLA Site Services Ltd | Construction | 2022 |
| RLM Contracting Limited | Other services | 2015 |
| RLM Management Limited | Real estate | 2018 |
| RLM Plumbing and Heating Limited | Construction | 2025 |
| RLN Music Limited | Arts & recreation | 2016 |
| Rlnyh Limited | Education | 2005 |
| RLP Ltd | Real estate | 2021 |
| RLX Construction Limited | Construction | 2020 |
| RLX Developments Limited | Real estate | 2022 |
| RLX Sofa Ltd | Other services | 2025 |
| RM City Construction Limited | Construction | 2014 |
| RM Property (Yorkshire) Ltd | Real estate | 2017 |
| RM Property Solutions Limited | Real estate | 2018 |
| Rm.Resourcesolutions Ltd | Public administration | 2025 |
| Rmamc Ltd | Real estate | 2023 |
| RMB Dental Ltd | Health & social care | 2024 |
| RMB Tooling Systems Limited | Professional & scientific | 2025 |
| Rmb&A Consultancy Ltd | Professional & scientific | 2023 |
| RMC Academy Limited | Arts & recreation | 2023 |
| RMC Media Ltd | Information & communication | 1991 |
| RMC Property Services Ltd | Administrative & support | 2021 |
| RMD Floors Ltd | Construction | 2026 |
| RMF Engineering Limited | Manufacturing | 1997 |
| RMH Operational Consultants Limited | Professional & scientific | 2024 |
| RMK Bespoke Consultancy Ltd | Financial services | 2015 |
| RMK Cooling Systems Limited | Construction | 2026 |
| RMK PVT Ltd | Wholesale & retail | 2023 |
| Rml/Lb Property Limited | Real estate | 2023 |
| Rmmd Holdings Limited | Financial services | 2023 |
| RMS Guides & Mill Spares (UK) Ltd | Manufacturing | 2024 |