| RJ Sandhu Estate Limited | Real estate | 2025 |
| RJ UK Courier Ltd | Transport & logistics | 2025 |
| RJB City Properties Limited | Construction | 2018 |
| RJJ Passions Ltd | Construction | 2026 |
| RJP Rental Property Limited | Real estate | 2018 |
| RJS (UK) Ltd | Transport & logistics | 2010 |
| RK Beauty and Aesthetics Clinic Limited | Other services | 2016 |
| RK Construction & Windows Ltd | Construction | 2018 |
| RK Prime Motors Ltd | Wholesale & retail | 2026 |
| RK Saithi Holding Limited | Real estate | 2023 |
| RK Sanawa Limited | Construction | 2025 |
| Rkajpk Limited | Real estate | 2025 |
| RKB Fruit & VEG Ltd | Wholesale & retail | 2020 |
| RKD Services Limited | Wholesale & retail | 2026 |
| Rkelsey Realty Ltd | Real estate | 2026 |
| RKJ Singh (Holdings) Ltd | Financial services | 2025 |
| RKK Enterprise Limited | Wholesale & retail | 2009 |
| RKN Properties Ltd | Real estate | 2023 |
| RKS Ventures Limited | Real estate | 2020 |
| RKV Berkshire Homes Ltd | Real estate | 2022 |
| RKV Homes Limited | Real estate | 2021 |
| RKV Investments Ltd | Households | 2017 |
| RKV Land and Investment Limited | Real estate | 2021 |
| RKV Residential Ltd | Real estate | 2020 |
| RLG Group Limited | Construction | 2021 |
| RM Global Investments Ltd | Financial services | 2009 |
| RM Social Infrastructure Opportunities 1 Limited | Real estate | 2020 |
| RM2 Trader Ltd | Public administration | 2026 |
| RMD Care Services Limited | Health & social care | 2005 |
| RMM Housing Investments Ltd | Real estate | 2024 |
| RMM Housing Ltd | Real estate | 2026 |
| RMP Chawla Properties Ltd | Real estate | 2024 |
| RMR1 Limited | Construction | 2025 |
| Rmtl Limited | Construction | 2026 |
| RNN Driving & Delivery Services Limited | Transport & logistics | 2016 |
| Roadsafe Haulage Ltd | Education | 2023 |
| Rock Cherry Limited | Information & communication | 2012 |
| Rockaway Apparel Ltd | Wholesale & retail | 2025 |
| Rocket Indexer Ltd | Wholesale & retail | 2026 |
| Rocket Restaurants Limited | Hospitality | 2014 |
| Rocksburg Limited | Professional & scientific | 2022 |
| Roglainteriors Limited | Construction | 2025 |
| Rohan Enterprise Ltd | Wholesale & retail | 2016 |
| Rohit Kumar Sankhla Ltd | Construction | 2024 |
| Rolling Craft Co. Ltd | Information & communication | 2026 |
| Roman (Delicatessen Merchants) Limited | Wholesale & retail | 1969 |
| Roman DIT Limited | Professional & scientific | 2019 |
| Romanempire Group Limited | Extraterritorial | 2025 |
| Romeo Studio Barbershop Ltd | Other services | 2024 |
| Romeys Restaurant Limited | Hospitality | 2026 |
| Rommel JAN Gestoso Ltd | Manufacturing | 2025 |
| ROO Repute Ltd | Information & communication | 2023 |
| Roofing & Cladding Solutions Ltd | Construction | 2025 |
| Roofing Excellence & Building Services Ltd | Wholesale & retail | 2017 |
| Rooku Ltd | Construction | 2025 |
| Root 7 Produce Limited | Wholesale & retail | 2016 |
| Rope and Rainbow Events Limited | Arts & recreation | 2021 |
| Rosa Consultancy Ltd | Health & social care | 2023 |
| Rose Gold Property Holdings Ltd | Wholesale & retail | 2025 |
| Roselea Care Homes Limited | Health & social care | 2000 |
| Roshni Jewellers Limited | Manufacturing | 2021 |
| Rossico Ltd | Transport & logistics | 2015 |
| Roti Shack CPU Ltd | Hospitality | 2024 |
| Roti Wala Limited | Other services | 2010 |
| Rotiexpress Ltd | Hospitality | 2023 |
| Routeforge Limited | Transport & logistics | 2024 |
| Roxy Clean Linen Services Ltd | Other services | 2021 |
| Royale Mortgages Ltd | Financial services | 2025 |
| Royel Imports Ltd | Wholesale & retail | 2020 |
| Rpabbis Ltd | Hospitality | 2011 |
| RPM Trading Ltd | Wholesale & retail | 2022 |
| RPN Overseas Ltd | Other services | 2018 |
| RPS Gold Ltd | Wholesale & retail | 2014 |
| RPS Logistics Ltd | Transport & logistics | 2023 |
| RPS Property Holding Limited | Real estate | 2021 |
| RPS Property LV Ltd | Real estate | 2025 |
| Rpsinvest Limited | Real estate | 2021 |
| RR Decor & Solutions Ltd | Construction | 2024 |
| RR Express & Movers Limited | Transport & logistics | 2025 |
| RR G & L Ltd | Administrative & support | 2025 |
| RR Investments (London) Ltd | Real estate | 2021 |
| RR Phantom Cars Limited | Administrative & support | 2012 |
| Rran Ltd | Households | 2024 |
| Rrkv Prop Co Ltd | Real estate | 2023 |
| RRN Retail UK Limited | Wholesale & retail | 2026 |
| RS & Co Estates Ltd | Real estate | 2020 |
| RS Cars Sales Ltd | Wholesale & retail | 2022 |
| RS Engineering Consultancy Limited | Professional & scientific | 2021 |
| RS Geneva Constructions Ltd | Construction | 2016 |
| RS Legacy Estates Ltd | Real estate | 2025 |
| RS Motors and Electrics Ltd. | Construction | 2014 |
| RS Properties Hayes Ltd | Real estate | 2022 |
| RS Scaffolding Supplies Ltd | Wholesale & retail | 2025 |
| RSD Studio Ltd. | Other services | 2015 |
| Rsjb Quality Care Homes Limited | Health & social care | 2021 |
| RSK Goods Ltd | Wholesale & retail | 2024 |
| RSL Paper (UK) Limited | Wholesale & retail | 2007 |
| RSM Tech Solutions Limited | Information & communication | 2023 |
| RST Beverages Limited | Wholesale & retail | 2020 |
| RST Southall Ltd | Wholesale & retail | 2022 |