| Rmproperties Development Ltd | Real estate | 2022 |
| RMR Property Solutions Ltd | Households | 2025 |
| RMR Psychotherapy Ltd | Health & social care | 2026 |
| RN Academic Ltd | Education | 2026 |
| RN Court Limited | Households | 2018 |
| RNA Building and Maintenance Ltd | Construction | 2022 |
| RNA Building Contractor Limited | Construction | 2016 |
| RNT Such Ltd | Health & social care | 2023 |
| Roadoclocklogistics Ltd | Transport & logistics | 2025 |
| Roadshow Bar Services Ltd | Hospitality | 2014 |
| Roamify Group Ltd | Construction | 2023 |
| ROB Wright Claims Limited | Financial services | 2026 |
| Robbie Grabarz Sports Consultancy Ltd | Arts & recreation | 2012 |
| Robbs Walk Management Company Limited | Households | 1990 |
| Robert Will Consultancy Limited | Administrative & support | 2016 |
| Roberts Catering Limited | Health & social care | 2014 |
| Roberts Court (Management) Limited | Households | 1984 |
| Roberts Court (Penge) Management Company Limited | Households | 1982 |
| Robins Court (Clapham) Limited | Households | 1996 |
| Robo Intelligent Ltd | Wholesale & retail | 2020 |
| Roboium Limited | Information & communication | 2021 |
| ROC Logic IT Solutions Limited | Information & communication | 2021 |
| Roca Court Freehold Limited | Households | 2016 |
| Rock Property Consultancy Limited | Real estate | 2015 |
| Rock Villa Property Limited | Real estate | 2023 |
| Rockbourne Road (Freehold) Ltd | Households | 2013 |
| Rockery Park Management Limited | Households | 2013 |
| Rockets to the Moon Ltd | Information & communication | 2024 |
| Rockett ST George Limited | Wholesale & retail | 2013 |
| Rockforge Properties Group Ltd | Real estate | 2026 |
| Rockforge Properties Investment Ltd | Real estate | 2026 |
| ROCKHILL786 Ltd | Wholesale & retail | 2024 |
| Rockingham Gate Limited | Administrative & support | 2007 |
| Rockingham House Limited | Administrative & support | 2007 |
| Rocks & Pebbles Limited | Health & social care | 2007 |
| Rockwell Green Properties Limited | Financial services | 2019 |
| ROD Music Media Ltd | Professional & scientific | 2019 |
| Rodan Property Maintenance Ltd | Construction | 2023 |
| Rodent & Roach Environmentals Ltd | Agriculture & fishing | 2020 |
| Rodeosburgers&Shakes(Croydon) Ltd | Hospitality | 2025 |
| Rodin Cars (UK) Limited | Manufacturing | 2020 |
| Rodin Driver Training Limited | Education | 2025 |
| Rodin Leasing Limited | Financial services | 2009 |
| Rodin Motorsport GP Limited | Administrative & support | 2010 |
| Rodin Motorsport Holdings Limited | Financial services | 2010 |
| Rodin Motorsport Limited | Professional & scientific | 2009 |
| Rodium Limited | Arts & recreation | 2022 |
| Rodrigues Construction Limited | Construction | 2022 |
| Rodriguez Services Ltd | Administrative & support | 2021 |
| Rodriques Company Ltd | Health & social care | 2021 |
| Rodwell Court Corporation Limited | Households | 1991 |
| Roema Limited | Wholesale & retail | 2025 |
| Roffey Park Management (NO.1) Limited | Households | 1992 |
| Roffey Park Management (NO.2) Limited | Households | 1992 |
| Rofho Ltd | Construction | 2021 |
| Roger and Partner Limited | Extraterritorial | 2022 |
| Rohaan Enterprises Ltd | Transport & logistics | 2021 |
| Rohaan Ltd | Wholesale & retail | 2023 |
| Rohais Management Limited | Households | 2004 |
| ROK Rico & RIO Limited | Health & social care | 2010 |
| Rokalo Ltd | Real estate | 2025 |
| Rokesh Properties Limited | Real estate | 2018 |
| Roksy Holdings Ltd | Other services | 2018 |
| Rokumi Ltd | Real estate | 2022 |
| Role Model Communications Ltd | Extraterritorial | 2011 |
| Roleau Limited | Wholesale & retail | 2010 |
| Roleys Wines Limited | Wholesale & retail | 2014 |
| Rolling Hills Management Limited | Households | 2013 |
| Rolling Retreats Caravans Ltd | Administrative & support | 2025 |
| Romain Designs Ltd | Information & communication | 2018 |
| Roman and LEE Fusion Ltd | Professional & scientific | 2026 |
| Roman and LEE Ltd | Real estate | 2024 |
| Roman Court a B Limited | Real estate | 2025 |
| Roman CT C D Limited | Real estate | 2025 |
| Roman Tiling Services Ltd | Construction | 2020 |
| Romania in the Third Millennium | Other services | 2002 |
| Romania Land Limited | Wholesale & retail | 2015 |
| Romaniello Ltd | Construction | 2020 |
| Romans Green Management Company Limited | Households | 2017 |
| Romart Global Limited | Extraterritorial | 2024 |
| Romey Healthcare Ltd | Health & social care | 2022 |
| Romford & Ilford Family Chiropractic Limited | Health & social care | 2004 |
| Romford Brewery RTM Company Limited | Households | 2009 |
| Romford Road Property Holdings Limited | Health & social care | 2024 |
| Romi's Supply & Logistics Limited | Wholesale & retail | 2025 |
| RON DE Young Associates Limited | Professional & scientific | 1985 |
| RON DE Young Resources Ltd | Professional & scientific | 1998 |
| Ronaldo Massage Hair & Beauty Spa Ltd | Health & social care | 2025 |
| Ronca's B. Limited | Hospitality | 2025 |
| Ronkswood Residents Management Company Limited | Households | 2016 |
| Roofing Repairs Ltd | Construction | 2021 |
| Rooftech Roofing and Guttering Services Ltd | Administrative & support | 2024 |
| Roohin PUB Ltd | Hospitality | 2025 |
| Rookes Court (Stratford Upon Avon) Limited | Households | 2000 |
| Roomywebs Hosting Solutions Limited | Information & communication | 2025 |
| Roost Landscapes Ltd | Administrative & support | 2026 |
| Roosters Spot Limited | Hospitality | 2010 |
| Root & Revive Limited | Construction | 2025 |
| Rooted Consulting Ltd | Administrative & support | 2013 |
| Rootical Dubber Enterprises Limited | Information & communication | 2004 |