| RT Tsco Ltd | Public administration | 2024 |
| RTA Reports Limited | Professional & scientific | 2019 |
| RTB Lettings and Property Management Ltd | Real estate | 2018 |
| RTH Courier Services Ltd | Transport & logistics | 2015 |
| RTH Motors Ltd | Wholesale & retail | 2023 |
| Rtjb Ltd | Transport & logistics | 2026 |
| RTL Holdings Limited | Financial services | 2018 |
| RTM Edlington Social Ltd | Hospitality | 2023 |
| RTM Social Club Limited | Hospitality | 2023 |
| RTO Consultancy Services Ltd | Information & communication | 2015 |
| RTR Group Holdings Limited | Financial services | 2022 |
| Rubber Side Down Ltd | Education | 2024 |
| Rubeco Trading Limited | Wholesale & retail | 2005 |
| Rubenpatrikexpress Ltd | Transport & logistics | 2020 |
| Rubizy Limited | Wholesale & retail | 2025 |
| Ruby Hearts Limited | Hospitality | 2023 |
| Ruby Nail Armthorpe Ltd | Other services | 2026 |
| Ruby Security Services (UK) Limited | Administrative & support | 2024 |
| Rubyfield Estates Limited | Real estate | 2001 |
| Rubyport Limited | Wholesale & retail | 1993 |
| Ruchi Takeaway Doncaster Ltd | Hospitality | 2025 |
| Rueben’S Rail Services Limited | Transport & logistics | 2018 |
| Rufford Properties Limited | Other services | 1984 |
| Rufimo Holding Limited | Financial services | 2024 |
| Ruhi's Stores Ltd | Wholesale & retail | 2023 |
| Rula Developments (Europa) Limited | Construction | 2024 |
| Rula Developments (Paradise) Limited | Construction | 2024 |
| Rula Developments (Tankersley) Limited | Construction | 2019 |
| Rula Developments Limited | Construction | 2016 |
| Rula Homes Ltd | Construction | 2020 |
| Rumba (Barnsley) Ltd | Hospitality | 2025 |
| Runic Transport Ltd | Transport & logistics | 2022 |
| Runmax Holdings Ltd | Construction | 2023 |
| Runner Domain Hosting Ltd | Other services | 2009 |
| Running MAN Enterprises Ltd | Real estate | 2023 |
| Rupert's Candy Ltd | Wholesale & retail | 2023 |
| Ruro Investments Limited | Real estate | 2022 |
| Rusandre Ltd | Transport & logistics | 2018 |
| Rushmore Property Services Ltd | Real estate | 2026 |
| Rushton Video Rail Limited | Information & communication | 2005 |
| Rusling Consultancy Ltd | Professional & scientific | 2026 |
| Rustanyoni Limited | Health & social care | 2012 |
| Rustic Root Furniture Ltd | Wholesale & retail | 2010 |
| Ruvira Ltd | Education | 2026 |
| Ruzay Limited | Wholesale & retail | 2018 |
| RV2 Civils Ltd. | Extraterritorial | 2022 |
| RV2 Group Ltd. | Extraterritorial | 2022 |
| RV2 Renewables Ltd. | Extraterritorial | 2022 |
| RVA Estates Ltd | Real estate | 2026 |
| RWF Holdings Limited | Professional & scientific | 2011 |
| RX Motors Ltd | Wholesale & retail | 2017 |
| RX Precifix Limited | Manufacturing | 2009 |
| RXW Ltd | Wholesale & retail | 2023 |
| Ryan Atkinson Property Limited | Real estate | 2026 |
| Ryan Civil & Haulage Ltd | Extraterritorial | 2017 |
| Ryan Davies Limited | Information & communication | 2013 |
| Ryan Innovation Ltd | Manufacturing | 2018 |
| Ryan Lysons INS Services Ltd | Financial services | 2016 |
| Ryan Millns Electrical Services Ltd | Construction | 2017 |
| Ryan Walker Limited | Construction | 2010 |
| Ryan Walker Properties Ltd | Real estate | 2021 |
| Ryans and FOY Funeral Directors Featherstone Limited | Other services | 2018 |
| Ryans and FOY Funeral Directors Limited | Other services | 2015 |
| Ryantrans Ltd | Transport & logistics | 2022 |
| Rychcik Transport Ltd | Transport & logistics | 2019 |
| Rycy & Rycy Ltd | Transport & logistics | 2025 |
| Rydale Consultants Limited | Professional & scientific | 2021 |
| Ryder & Ridley Engineering Ltd | Professional & scientific | 2021 |
| Ryder Electrical Services Limited | Construction | 2008 |
| Ryderromeo Electrical Ltd | Manufacturing | 2024 |
| RYK Tranzit World Ltd | Transport & logistics | 2020 |
| Rynat Limited | Professional & scientific | 2004 |
| Ryott Passive Fire Protection Ltd | Other services | 2026 |
| RYS Asset Management Limited | Financial services | 2025 |
| RYS Developments Limited | Construction | 2015 |
| RZ Transport Ltd | Transport & logistics | 2015 |
| RZM Holdings Limited | Financial services | 2023 |
| S & a Bars Ltd | Hospitality | 2025 |
| S & a Fewster Commercials Ltd | Wholesale & retail | 2024 |
| S & a Johnson (Property) Ltd | Real estate | 2026 |
| S & C Transport Limited | Transport & logistics | 2003 |
| S & D Garden Building Limited | Manufacturing | 2025 |
| S & D Garritt Limited | Professional & scientific | 2003 |
| S & D Outdoor Living Limited | Manufacturing | 2021 |
| S & EMM Ltd | Wholesale & retail | 2012 |
| S & J Building & Auto Services Ltd | Construction | 2025 |
| S & J Chorlton Freight Ltd | Administrative & support | 2016 |
| S & J Maintenance Limited | Administrative & support | 2008 |
| S & K Barbers Limited | Other services | 2025 |
| S & K Clarke Ltd | Extraterritorial | 2019 |
| S & M Mortgage and Investments Limited | Financial services | 2001 |
| S & P Leisure Limited | Administrative & support | 1998 |
| S & P Medical Management Ltd | Health & social care | 2010 |
| S & S 149 Properties Limited | Real estate | 2025 |
| S & S Edlington Limited | Information & communication | 2022 |
| S & S Electrical (Yorkshire) Ltd | Construction | 2016 |
| S & W Developments Limited | Construction | 2001 |
| S a Auto Solutions Ltd | Transport & logistics | 2018 |
| S a Hornsby Ltd | Transport & logistics | 2023 |
| S a Isik Limited | Hospitality | 2026 |