| RPR Property Solutions Ltd | Real estate | 2019 |
| RQT Property Investments Limited | Real estate | 2016 |
| RR Management Services Limited | Administrative & support | 2005 |
| RR Masih Investments Limited | Real estate | 2023 |
| RRI Chauffeuring Ltd | Administrative & support | 2025 |
| RS Construction Bedford Limited | Construction | 2022 |
| RS Investments and Developments Limited | Real estate | 2015 |
| RS Property Maintenance Cornwall Ltd | Construction | 2023 |
| RS9 Consulting Limited | Extraterritorial | 2019 |
| RSA Capital Limited | Real estate | 2022 |
| RSB Construction Management Limited | Professional & scientific | 2022 |
| RSD IT Solutions Ltd | Professional & scientific | 2023 |
| RSJ Consultants Limited | Professional & scientific | 2003 |
| RSP Lettings Limited | Real estate | 2023 |
| RSP UK Properties Limited | Real estate | 2021 |
| RSP UK Suction Excavators Ltd | Manufacturing | 2016 |
| RSR Enterprises Ltd | Administrative & support | 2020 |
| RSS Solutions Limited | Financial services | 2009 |
| Rssb Southall Limited | Construction | 1998 |
| Rstar Logistics Ltd | Transport & logistics | 2018 |
| Rsug Cleaning Limited | Construction | 2022 |
| RT Service 1 UK Ltd | Transport & logistics | 2022 |
| RTB Consulting Limited | Professional & scientific | 2007 |
| RTD Engineering Limited | Professional & scientific | 2012 |
| RTG Commercial Services Ltd | Professional & scientific | 2017 |
| RTR Trading Ltd | Manufacturing | 2025 |
| Rubato Consultancy Limited | Health & social care | 2016 |
| Rubens Holdings Limited | Financial services | 2019 |
| Rubens Management Ltd | Professional & scientific | 2019 |
| Ruby & Lily Properties Ltd | Real estate | 2022 |
| Ruby Lazuli Ltd | Manufacturing | 2023 |
| Rubys Bar and Restaurant Ltd | Hospitality | 2026 |
| Rugby Renegade Ltd | Wholesale & retail | 2014 |
| Rumara Fashions UK Ltd | Manufacturing | 2024 |
| Rumble Consulting Limited | Information & communication | 2020 |
| Rundrill Solutions Limited | Professional & scientific | 2018 |
| Runsel Media, Limited Partnership | | 2017 |
| Runspot Limited | Households | 1987 |
| Rupal Group Ltd | Financial services | 2025 |
| Rupert and Green Limited | Wholesale & retail | 2024 |
| Rupra Estate Management Limited | Administrative & support | 2015 |
| Rural Ibiza Ltd | Administrative & support | 2023 |
| Rural Roofing Restoration Ltd | Construction | 2023 |
| Rushton Electrical Ltd | Construction | 2021 |
| Rushton Plumbing & Heating Ltd | Construction | 2025 |
| Russell Academy Ltd | Education | 2015 |
| Russell Autocentre Ltd | Wholesale & retail | 2018 |
| Russells (Accountants) Limited | Professional & scientific | 2002 |
| Russo Hairdressing Limited | Other services | 2010 |
| Rustic Flow Ltd | Wholesale & retail | 2021 |
| Rusty Drums Ltd | Wholesale & retail | 2012 |
| RUU Trading Limited | Hospitality | 2014 |
| Ruzam Ltd | Real estate | 2025 |
| RVR Best Choice Limited | Real estate | 2018 |
| Rvsd London Ltd | Arts & recreation | 2021 |
| RWA Child Protection Limited | Financial services | 2021 |
| RWB Bespoke Builders Ltd. | Construction | 2014 |
| RWD Property Solutions Ltd | Real estate | 2023 |
| RWJ Property Ltd | Real estate | 2023 |
| RWJ Resources Ltd | Manufacturing | 2019 |
| Rwqa Ltd | Professional & scientific | 2015 |
| RXN Properties Ltd | Real estate | 2025 |
| Ryans Plumbing and Heating Ltd | Construction | 2020 |
| Ryevale Limited | Construction | 1998 |
| Rynes Properties Ltd | Real estate | 2024 |
| Ryviera Limited | Wholesale & retail | 2025 |
| Rzintrade Ltd | Wholesale & retail | 2020 |
| S & L COX Limited | Health & social care | 2009 |
| S & W Barber's Ltd | Other services | 2025 |
| S a J Properties UK Ltd | Real estate | 2015 |
| S and S Guri Building Ltd | Construction | 2022 |
| S D C (Holdings) Limited | Financial services | 1983 |
| S Emery Ventilation Limited | Other services | 2015 |
| S Emms Ltd | Wholesale & retail | 2019 |
| S F T Amusements Ltd | Arts & recreation | 2017 |
| S Hussain Cars Ltd | Wholesale & retail | 2020 |
| S Hussain Property Holdings Limited | Real estate | 2025 |
| S I Motoring Ltd | Wholesale & retail | 2026 |
| S I R Whitbread Group Ltd | Wholesale & retail | 2024 |
| S J Dimmock Engineering Limited | Manufacturing | 2008 |
| S J Tax Limited | Professional & scientific | 2007 |
| S L G Printers Limited | Professional & scientific | 2011 |
| S Lydon Plant Hire Limited | Construction | 2017 |
| S M Asset Holdings Ltd | Real estate | 2019 |
| S M Brickwork Ltd | Construction | 2015 |
| S M Cappo Bar Ltd | Hospitality | 2026 |
| S M Specialist Cars Ltd | Wholesale & retail | 2011 |
| S N G Chinese Trading Limited | Hospitality | 2021 |
| S P Associates (International) Limited | Administrative & support | 2005 |
| S P L Fire and Security Limited | Construction | 2015 |
| S R Dunster Ltd. | Construction | 2011 |
| S R New Aircraft Maintenance Ltd | Manufacturing | 2024 |
| S Raza Medics Ltd | Health & social care | 2012 |
| S S Afghan Bazar Ltd | Wholesale & retail | 2019 |
| S V Golf Ltd | Education | 2011 |
| S W Home Limited | Financial services | 2007 |
| S W Smith Group Ltd | Wholesale & retail | 2019 |
| S&A Painting and Decorating Ltd | Construction | 2018 |
| S&E Landscaping Limited | Construction | 2012 |
| S&H Design Management Services Limited | Professional & scientific | 2021 |