| Robin Brand Consultants Limited | Professional & scientific | 2015 |
| Robins Close Management Company Limited | Households | 1966 |
| Robinson & Morgan Ltd | Real estate | 2022 |
| Robinsons Property Limited | Real estate | 2018 |
| Robyn - Professional Beauty Ltd | Other services | 2003 |
| Rochtem Ltd | Health & social care | 2010 |
| Rock Hill Props Ltd | Administrative & support | 2021 |
| Rock Salt Prints Ltd | Administrative & support | 2017 |
| Rockandrew Limited | Information & communication | 2016 |
| Rocket Science Creative Services Limited | Professional & scientific | 2002 |
| Rockforce Limited | Construction | 2015 |
| Rockpool Cottage 5 Limited | Real estate | 2024 |
| Rockside Housing Limited | Real estate | 2025 |
| Rocksteady Care Ltd | Health & social care | 2020 |
| Rodjem Limited | Construction | 2025 |
| Rodopi Ltd | Hospitality | 2024 |
| Roff Media Limited | Manufacturing | 2003 |
| Rogans Estate Agents Limited | Real estate | 2024 |
| Roger a Hughes Ltd | Professional & scientific | 2002 |
| Roger Berry Audio Ltd | Professional & scientific | 2004 |
| Roger Howes Limited | Other services | 2026 |
| Roger Lake Ltd | Other services | 2019 |
| Rogers Landscapes Design and Consultancy Limited | Administrative & support | 2018 |
| Roguish Films Ltd | Information & communication | 2025 |
| Roho Agave Ltd | Wholesale & retail | 2023 |
| ROI E-Solutions Ltd | Information & communication | 2017 |
| ROK Consulting Services Limited | Professional & scientific | 2026 |
| Rok-On Express Limited | Administrative & support | 2009 |
| Roka Healthcare Ltd | Wholesale & retail | 2022 |
| Roland Barton Transport Limited | Manufacturing | 2019 |
| Roland Cargo Ltd | Transport & logistics | 2020 |
| Rolaxit Innovation Ltd | Information & communication | 2022 |
| Roldot International Limited | Construction | 2008 |
| Rolling Stock Specialist Consultancy Ltd | Professional & scientific | 2023 |
| Roma Construction Ltd | Construction | 2011 |
| Romack Construction Ltd | Construction | 1995 |
| Romafolli Limited | Other services | 2022 |
| Roman Balustrades Ltd | Construction | 2019 |
| Roman Leaver Properties Ltd | Real estate | 2026 |
| Romden Farm Ltd | Other services | 2020 |
| Romney Marsh Wools Limited | Wholesale & retail | 2015 |
| Roni Cafe EN Ltd | Hospitality | 2024 |
| Roniks Dental Limited | Health & social care | 2026 |
| Roniks Limited | Real estate | 2010 |
| Ronke Olaibi Ltd | Other services | 2023 |
| Ronnoconpropertymanagement Limited | Households | 2024 |
| Roofing GB (Kent) Limited | Construction | 2019 |
| Rooms Central Limited | Real estate | 2013 |
| Rooney Property Group Limited | Real estate | 2022 |
| Root Mylk Ltd | Manufacturing | 2023 |
| Root Remedies Limited | Manufacturing | 2024 |
| Rosan Global Consulting Ltd | Professional & scientific | 2022 |
| Rose Asset Solutions Ltd | Construction | 2022 |
| Rose MOT Centre Limited | Wholesale & retail | 2013 |
| Roseadil Ltd | Wholesale & retail | 2023 |
| Rosemary & Thyme Limited | Manufacturing | 1996 |
| Rosemere Care Home Ltd | Health & social care | 2002 |
| Rosewell's Tattoo Studio Ltd | Other services | 2021 |
| Rosewood Construction Kent Limited | Construction | 2018 |
| Rosh Homes Ltd | Real estate | 2025 |
| Rotac Ltd | Manufacturing | 2014 |
| Rotaia Media Limited | Administrative & support | 2017 |
| Rotaia Properties Limited | Real estate | 2021 |
| Rouse Formwork Ltd | Construction | 2020 |
| Rowanashford Management Limited | Professional & scientific | 2006 |
| Rowans KS Limited | Professional & scientific | 2014 |
| Rowlands Pine Limited | Wholesale & retail | 2008 |
| Roxwell Surveys Limited | Professional & scientific | 2016 |
| ROY Kitchen Bedroom Ltd | Construction | 2025 |
| Royal Court RTM Company Ltd | Households | 2025 |
| Royalblue Cuisine Ltd | Professional & scientific | 2012 |
| Royalblue Executive Services Ltd | Hospitality | 2004 |
| Royalblue Inflight Catering Ltd | Hospitality | 2019 |
| Royalblue Inflight Services Ltd | Hospitality | 2015 |
| Royallty Chauffeurs Limited | Transport & logistics | 2023 |
| RP Thomas Ltd | Real estate | 2010 |
| Rpbconsult Limited | Information & communication | 2019 |
| RPC Suppliers Ltd | Wholesale & retail | 2004 |
| RPE International Limited | Real estate | 2010 |
| RPH Enterprise Limited | Real estate | 2012 |
| RPK Consulting Limited | Administrative & support | 2008 |
| RR Group Logistics Ltd | Transport & logistics | 2020 |
| RR Warpaint Ltd | Wholesale & retail | 2022 |
| Rret Ltd | Real estate | 2025 |
| RRH Equine Ltd | Agriculture & fishing | 2025 |
| RRN Properties Ltd | Real estate | 2021 |
| RS Customs Consultancy Ltd | Professional & scientific | 2015 |
| RSB Suddards Ltd | Health & social care | 2025 |
| Rsjkl PLC | Professional & scientific | 1987 |
| RSR Drains Ltd | Water & waste | 2023 |
| RSW Consortium Ltd | Administrative & support | 2023 |
| RSX IT Solutions Ltd | Information & communication | 2023 |
| RT Marine Ltd. | Extraterritorial | 2012 |
| RT Solutions Analysis Ltd | Administrative & support | 2025 |
| RTL Real Estate Limited | Construction | 2024 |
| RTM Group Holdings Limited | Financial services | 2025 |
| RTM Maintenance & Cleaning Services Ltd | Administrative & support | 2023 |
| RTM Scaffolding Limited | Construction | 2025 |
| RU Cooling Services Ltd | Construction | 2019 |
| Rubab Couture Ltd | Wholesale & retail | 2024 |