| RK Audios Ltd | Information & communication | 2006 |
| RLK Plastering Ltd | Construction | 2023 |
| RLM Architects Ltd | Professional & scientific | 2008 |
| RLP Solutions Ltd. | Financial services | 2011 |
| RM Change Consulting Limited | Professional & scientific | 2014 |
| RM Data Limited | Information & communication | 2024 |
| RM Swan Ltd | Professional & scientific | 2018 |
| RMB Ventures Ltd | Administrative & support | 2024 |
| RMI People Limited | Professional & scientific | 2013 |
| RMI Results Coaching Ltd | Professional & scientific | 2019 |
| RMP Consulting Limited | Professional & scientific | 2005 |
| RMS Charente Ltd | Professional & scientific | 2006 |
| RO5 Consulting Limited | Professional & scientific | 2024 |
| ROB Gough Consulting Limited | Information & communication | 2019 |
| Robin Davies Consulting Limited | Professional & scientific | 2023 |
| Robosystems Ltd | Professional & scientific | 2022 |
| Robson Property Development Solutions Limited | Real estate | 2020 |
| Robust Measurable Solutions Ltd | Information & communication | 2022 |
| Robx Technologies Ltd | Information & communication | 2021 |
| Roccaforte Holdings Limited | Construction | 2023 |
| Rochemont Industries Ltd | Information & communication | 2022 |
| Rocinante Consultants Ltd | Professional & scientific | 2024 |
| Rockcliffe Associates Limited | Professional & scientific | 2010 |
| Rockee Limited | Information & communication | 2021 |
| Rocket Vehicle Group Limited | Administrative & support | 2021 |
| Rockhurst Limited | Real estate | 2012 |
| Rockpool Consulting Limited | Information & communication | 2025 |
| Rocksure Construction (South) Ltd. | Construction | 2007 |
| Rodford Engineering Limited | Manufacturing | 1997 |
| Rodford Land Limited | Real estate | 2018 |
| Rodways Property Management Ltd | Hospitality | 2011 |
| ROE and IB Healthcare Consultancy Services Ltd | Health & social care | 2025 |
| Roger Wilkinson LLP | | 2016 |
| Rogers Roofing Ltd | Construction | 2023 |
| Rogue Solutions Ltd | Information & communication | 2017 |
| Rojas Consulting Limited | Information & communication | 2021 |
| Rokajo Limited | Administrative & support | 2010 |
| Rollalong Holdings Limited | Professional & scientific | 1998 |
| Rollalong Limited | Construction | 1998 |
| Rolling Thunder Show Ltd | Arts & recreation | 2022 |
| Romsey Optical Ltd | Health & social care | 2020 |
| Romy Store Ltd | Wholesale & retail | 2021 |
| Ronheights Limited | Households | 1987 |
| Ronin Pro Ltd | Information & communication | 2022 |
| Roobotix Consulting Limited | Information & communication | 2022 |
| Roofclad Developments Ltd | Construction | 2026 |
| Roofsurv Dorset Limited | Construction | 2016 |
| Roofsurv UK Limited | Construction | 2024 |
| ROOMS4ROOST Ltd | Real estate | 2019 |
| Roost Homecare Ltd | Health & social care | 2025 |
| Roots Mental Health Ltd | Health & social care | 2020 |
| Rosanna Wiseman Limited | Professional & scientific | 2019 |
| Rose & Crown (Lytchett Matravers) Limited | Hospitality | 2009 |
| Rose & Lily Florals Ltd | Wholesale & retail | 2023 |
| Rose Barn Ltd | Real estate | 2026 |
| Rose Tinted Limited | Information & communication | 2018 |
| Rosemary RA Ltd | Hospitality | 2025 |
| Rosetech Services Ltd | Administrative & support | 2017 |
| Rosewood Design Studio Limited | Information & communication | 2010 |
| Rosper Property Ltd | Real estate | 2014 |
| Rotation Production and Media Services Ltd. | Information & communication | 2006 |
| Rotation Vinyl Ltd | Wholesale & retail | 2021 |
| Rotawi Ltd | Professional & scientific | 2019 |
| Rotor Adventures Ltd | Arts & recreation | 2018 |
| Roundway Consulting Limited | Information & communication | 2007 |
| Routes Green Ltd | Hospitality | 2020 |
| Rowan Asset Disposal Ltd | Water & waste | 2024 |
| Rowsley Consulting Limited | Professional & scientific | 2018 |
| Roxy Wraps Limited | Wholesale & retail | 2025 |
| Roxy's Cleaning Limited | Administrative & support | 2021 |
| ROY Bolson Limited | Construction | 2011 |
| RP Joyce Forestry & Habitat Management Ltd | Agriculture & fishing | 2018 |
| RPD Associates Ltd | Real estate | 1999 |
| RR Dynamics Limited | Information & communication | 2019 |
| RRR U.K Ltd | Wholesale & retail | 2024 |
| RS Fencing and Agriculture Ltd. | Administrative & support | 2014 |
| RS Retail Ltd | Information & communication | 2018 |
| RSE Construction Ltd | Construction | 2014 |
| Rsjb Consulting Ltd | Information & communication | 2018 |
| RSM Roofing (Dorset) Ltd | Construction | 2017 |
| Rssb Ltd | Information & communication | 2023 |
| RTI Estates Holdings Limited | Financial services | 2025 |
| RTI Estates Ltd | Real estate | 2012 |
| Ruafox Limited | Health & social care | 2012 |
| Ruataniwha Limited | Information & communication | 2025 |
| Rubber Sales Limited | Wholesale & retail | 2017 |
| Rubo Creations Limited | Manufacturing | 2025 |
| Ruchie Hair Boutique Limited | Other services | 2024 |
| Rule on Limited | Arts & recreation | 2013 |
| Rule Plastering Limited | Information & communication | 2016 |
| Rumsey Consulting Services Ltd | Information & communication | 2025 |
| Rune Sports Management Ltd | Professional & scientific | 2024 |
| Rupdam Ltd | Professional & scientific | 2024 |
| Rushmere ERP Consultancy Ltd | Information & communication | 2021 |
| Russell French Limited | Wholesale & retail | 2002 |
| Russian Jewellers Limited | Manufacturing | 2003 |
| RUSSY3 Ltd | Administrative & support | 2023 |
| Ruthenium Management Limited | Professional & scientific | 2022 |
| Rutherford 1 Limited | Financial services | 2024 |
| Rutherford 2 Limited | Construction | 2024 |