| Roxy Hair Extensions U.K Limited | Other services | 2025 |
| Roxy Movies Bishop’S Stortford Limited | Information & communication | 2024 |
| Roxy Movies(The Oxford Cinema) Limited | Information & communication | 2025 |
| Roxy Properties Limited | Other services | 2020 |
| ROY Cairney Carpentry & Maintenance Ltd | Construction | 2015 |
| Royal Docks Electrical Ltd | Construction | 2007 |
| Royal Flush Cleaning Solutions Ltd | Administrative & support | 2025 |
| Roybot Limited | Information & communication | 2024 |
| Rp&O Ltd | Construction | 2010 |
| RPC Essex Limited | Professional & scientific | 2026 |
| RPC Estates Limited | Real estate | 2015 |
| RPC T/A Mintoo Ltd | Hospitality | 2022 |
| RPD Inspire Limited | Professional & scientific | 2012 |
| RPD Plastering Limited | Construction | 2017 |
| RPJ Compliance Ltd | Professional & scientific | 2026 |
| RPK Print Services Europe Limited | Manufacturing | 2008 |
| RPL Ontrack Solutions Ltd | Construction | 2018 |
| RR United Services Ltd | Construction | 2014 |
| RRL & S Limited | Other services | 2014 |
| RS Insulations Limited | Construction | 2019 |
| RS Luxury Rental UK Ltd | Administrative & support | 2025 |
| RS MOT & Service Limited | Wholesale & retail | 2019 |
| RS Pilates Limited | Arts & recreation | 2025 |
| RS Plumbing & Heating Services (UK) Limited | Construction | 2019 |
| RS Property Investments & Management Ltd | Real estate | 2020 |
| RSB Engineering Limited | Manufacturing | 2025 |
| RSB Essex Ltd | Professional & scientific | 2020 |
| RSC Modular Systems Ltd | Construction | 2021 |
| Rsde Property Ltd | Real estate | 2021 |
| Rsde Services Limited | Wholesale & retail | 2010 |
| Rsk-Health-Inc Limited | Health & social care | 2021 |
| Rskr Ltd | Real estate | 2024 |
| RSM Trans Ltd | Transport & logistics | 2024 |
| RSP A1 Construction Limited | Construction | 2017 |
| Rspf Ltd | Wholesale & retail | 2022 |
| RSS Group Consulting Ltd | Other services | 2023 |
| RSS Group Holdings Limited | Financial services | 2020 |
| RT Transport Ltd | Transport & logistics | 2026 |
| RTG Group (UK) Limited | Administrative & support | 2014 |
| RTS Ventilation Specialists Limited | Construction | 2025 |
| Ruach Health Limited | Administrative & support | 2016 |
| Ruby Transport Ltd | Transport & logistics | 2026 |
| Rudra Exim Ltd | Wholesale & retail | 2016 |
| Rudsservices Limited | Other services | 2026 |
| Rufsod Ltd | Transport & logistics | 2024 |
| Ruga HGV Limited | Transport & logistics | 2013 |
| Ruisu Holdings Ltd | Wholesale & retail | 2024 |
| Rumax Limited | Health & social care | 2010 |
| Rumbaclat Limited | Wholesale & retail | 2024 |
| Run Free Limited | Construction | 2005 |
| RUS Consultancy Limited | Information & communication | 2013 |
| RUS Property Services Ltd | Administrative & support | 2017 |
| Russ Cook Consultancy Ltd | Construction | 2015 |
| Russo Insurance Brokers Ltd | Financial services | 2016 |
| Rustiko Limited | Construction | 2024 |
| Rutherford Investment Properties Ltd | Real estate | 2023 |
| Rutherford Property Limited | Real estate | 2015 |
| RVC Transport Ltd | Transport & logistics | 2025 |
| RVI Utility Ltd | Construction | 2021 |
| RW Transport Consultant Services Limited | Professional & scientific | 2015 |
| Rwdp Limited | Real estate | 2026 |
| RWM Profiles Ltd | Construction | 2025 |
| RWR Environmental Ltd | Water & waste | 2026 |
| RY Rail Services Ltd | Professional & scientific | 2009 |
| Ryan & Noah Ltd | Construction | 2020 |
| Ryan Worthington Health and Well-Being Limited | Other services | 2024 |
| Ryan Worthington PT Health & Well-Being Limited | Other services | 2020 |
| Rylau Building Services Limited | Construction | 2011 |
| Rysy Transport Limited | Transport & logistics | 2023 |
| RYT Plumbing Limited | Construction | 2015 |
| RZ Moments Ltd | Professional & scientific | 2026 |
| S & D Partners Ltd | Professional & scientific | 2011 |
| S & K Environmental Solutions Limited | Water & waste | 2013 |
| S & R Collectables Limited | Other services | 2025 |
| S Brown Construction (Essex) Limited | Construction | 2019 |
| S Brown Construction UK Services Limited | Construction | 2026 |
| S Clearance and Removals Limited | Transport & logistics | 2025 |
| S G Restorations Limited | Construction | 2018 |
| S J R Interiors Ltd | Construction | 2003 |
| S J Read Electrical Limited | Construction | 2022 |
| S J Sanders Facilities Limited | Administrative & support | 2016 |
| S J Woodhouse Properties Ltd | Real estate | 2017 |
| S L B Contracts Limited | Administrative & support | 2007 |
| S Lewin & SON Ltd | Construction | 2020 |
| S Morcom Recruitment Ltd | Administrative & support | 2024 |
| S N Digital Ltd | Professional & scientific | 2019 |
| S Turner Roofing & Cladding Limited | Construction | 2015 |
| S Vidgeon Drylining Ltd | Construction | 2026 |
| S&A Services (U.K) Limited | Administrative & support | 2022 |
| S&C Construction Services Limited | Professional & scientific | 2019 |
| S&C Joinery Limited | Construction | 2023 |
| S&J Foods Ltd | Manufacturing | 2019 |
| S&J Self Drive Hire Limited | Administrative & support | 2024 |
| S&M Interiors Limited | Construction | 2017 |
| S&S Pilates Studio Ltd | Arts & recreation | 2026 |
| S. Hayter Limited | Health & social care | 2025 |
| S. Levitt Properties Limited | Real estate | 1962 |
| S. Townley Flooring Limited | Other services | 1998 |
| S.A. Admin Limited | Construction | 2025 |
| S.A. Robertson Limited | Construction | 2004 |