| Rosso Fuoco Estates Limited | Real estate | 2023 |
| Rosso Fuoco Ltd | Hospitality | 2014 |
| Rosta Consulting Ltd | Information & communication | 2025 |
| Roston Court Nominees 2 Ltd | Extraterritorial | 2019 |
| Roston Court Nominees Ltd | Extraterritorial | 2018 |
| Roston Investments Limited | Real estate | 2008 |
| Roston Property Ltd | Real estate | 2016 |
| Rotherham Estates II Ltd | Extraterritorial | 2022 |
| Rotherham Estates Ltd | Extraterritorial | 2020 |
| Rotite Ltd | Professional & scientific | 2012 |
| Round Table Records Ltd | Administrative & support | 2024 |
| Route Delivery Solutions (RDS) Ltd | Transport & logistics | 2021 |
| Routezilla Logistics Ltd | Transport & logistics | 2026 |
| Rovel Limited | Other services | 2018 |
| Rover Brothers Import & Export UK Limited | Wholesale & retail | 2023 |
| Rowan Whitford Ltd | Real estate | 2013 |
| ROX TOM Ltd | Construction | 2020 |
| Roya International Ltd | Real estate | 2022 |
| Royai Agate Pet Nutrition Research Co. Ltd | Manufacturing | 2023 |
| Royale Custom Wigs Limited | Professional & scientific | 2012 |
| Royle Aviation Limited | Extraterritorial | 1978 |
| Royton Electrical Services Limited | Wholesale & retail | 1974 |
| Rozel Bay Properties Ltd | Real estate | 2025 |
| RP Manc Ltd | Administrative & support | 2025 |
| RPA Publishing Limited | Information & communication | 1995 |
| RPJ Limited | Manufacturing | 2025 |
| RQ2 Wirral Waters Ltd | Construction | 2023 |
| Rrfe Limited | Transport & logistics | 2025 |
| RRG (West Yorkshire) Limited | Wholesale & retail | 2003 |
| Rsbm Finance Ltd | Financial services | 2021 |
| Rsbrm Group Ltd | Real estate | 2018 |
| RSK 4 Ltd | Real estate | 2024 |
| RSK 52 Ltd | Real estate | 2024 |
| RSK Auto’S Ltd | Administrative & support | 2025 |
| RSK Connect Limited | Professional & scientific | 2025 |
| RSP & Sons Limited | Real estate | 2022 |
| RSW Industries Ltd | Wholesale & retail | 2020 |
| Ruach Services Limited | Real estate | 2020 |
| Rubix Data Centers Ltd | Information & communication | 2026 |
| Rublis Ltd | Construction | 2019 |
| Ruby's Convenience Store Ltd | Wholesale & retail | 2026 |
| Rudy Trade Ltd | Construction | 2021 |
| Rugby Street Property Ltd | Real estate | 2022 |
| Rugo Estates Ltd | Real estate | 2018 |
| Ruisheng Estates Development Co. Limited | Real estate | 2025 |
| Rukani Enterprises Ltd | Wholesale & retail | 2021 |
| Rukki's Care Ltd | Health & social care | 2024 |
| Rule 5 Communications Limited | Professional & scientific | 2012 |
| Ruma International Limited | Wholesale & retail | 2025 |
| Run by Code Ltd | Information & communication | 2022 |
| Run Wear Limited | Wholesale & retail | 2026 |
| Rupercourt Management Limited | Households | 1976 |
| Rura Limited | Professional & scientific | 2007 |
| Russell Court (Leamington) Limited | Households | 1968 |
| Rusty Brick Ltd | Extraterritorial | 2020 |
| Rusu F Construction Ltd | Construction | 2021 |
| Rutland Marketing Limited | Wholesale & retail | 2011 |
| Rutledge Services Ltd | Wholesale & retail | 2018 |
| Ruvaflorist.Co Ltd | Professional & scientific | 2024 |
| RVJ Visione Limited | Professional & scientific | 2025 |
| RVK Property Limited | Real estate | 2024 |
| RW Design - Painting & Decorating Ltd | Construction | 2025 |
| Ryan Boyd Rail Limited | Professional & scientific | 2016 |
| Ryan Parker Interiors Ltd | Other services | 2025 |
| Rybm Ltd | Real estate | 2022 |
| Rylec Limited | Construction | 2019 |
| Rysb Investers Ltd | Real estate | 2023 |
| Rysnc Limited | Wholesale & retail | 2025 |
| Ryvo Limited | Wholesale & retail | 2026 |
| RZT Pharma Ltd | Health & social care | 2023 |
| S & a Murray Ltd | Real estate | 2025 |
| S & L Howard Homes Ltd | Real estate | 2023 |
| S & S Property Management (MCR) Ltd | Real estate | 2011 |
| S Aelion Ltd | Administrative & support | 2021 |
| S and a Express Limited | Wholesale & retail | 2019 |
| S D a (Magnetics) Limited | Manufacturing | 1996 |
| S D Woolf & Co Limited | Other services | 1998 |
| S E Capital Limited | Real estate | 2016 |
| S Friedman Limited | Arts & recreation | 2020 |
| S G Electrical (Manchester) Ltd | Construction | 2019 |
| S Idrispropertyinvestment Limited | Real estate | 2023 |
| S Patel Traders Limited | Wholesale & retail | 2026 |
| S Rose Cosmetics & Academy Ltd | Other services | 2021 |
| S S Adam Ltd | Wholesale & retail | 2025 |
| S&F Investment Holdings Limited | Financial services | 2025 |
| S&J Building Maintenance Ltd | Construction | 2025 |
| S&L Chill Fashion Ltd | Wholesale & retail | 2025 |
| S&S Block Management Ltd | Real estate | 2011 |
| S&S Internal Ltd | Real estate | 2021 |
| S&S Management Group Ltd | Real estate | 2017 |
| S&S Partnership Ltd | Real estate | 2021 |
| S&S Retailers Ltd | Wholesale & retail | 2025 |
| S&S Sales Ltd | Real estate | 2011 |
| S&V Fire Protection Limited | Construction | 2019 |
| S&W Estates Ltd | Real estate | 2022 |
| S&Z Trading International Limited | Transport & logistics | 2022 |
| S-J Case Management Ltd | Health & social care | 2026 |
| S. & B. Unisex Fashionwear Co. Limited | | 1981 |
| S.Causeme Limited | Wholesale & retail | 2025 |
| S.D.C. Trading Limited | Hospitality | 1997 |