| Rainmaker Location Management Ltd | Administrative & support | 2010 |
| Rainsford Road (Chelmsford) Management Limited | Households | 1999 |
| Rainy Gorilla Developments Ltd | Other services | 2021 |
| Raize Ltd | Information & communication | 2026 |
| RAJ Jana Construction Ltd | Professional & scientific | 2021 |
| Rajiv & Nandhini Ltd | Real estate | 2024 |
| RAK Data Systems Ltd | Information & communication | 2024 |
| Rally Care Limited | Health & social care | 2009 |
| RAM Cognitive Services Limited | Information & communication | 2024 |
| RAM KK Ltd | Information & communication | 2017 |
| Ramachandran & Co Ltd | Hospitality | 2024 |
| Ramh Holdings Limited | Professional & scientific | 2018 |
| Ramsay HIP Knee Ltd | Real estate | 2021 |
| Ramsden Pipework Services Limited | Construction | 2004 |
| Ramtech Consultancy Ltd | Information & communication | 2025 |
| Rana Property UK Limited | Real estate | 2018 |
| Ranch Management Limited | Professional & scientific | 2021 |
| Random Group Limited | Wholesale & retail | 1984 |
| Rang Spice Ltd | Hospitality | 2018 |
| Rangineni Group Ltd | Real estate | 2025 |
| Rapid Adhd Ltd | Health & social care | 2026 |
| Rapid Business Services Limited | Professional & scientific | 1986 |
| Rapid Refreshments Ltd | Wholesale & retail | 2026 |
| Rapidz Ltd | Wholesale & retail | 2023 |
| Raptohna Ltd | Professional & scientific | 2019 |
| Raptor Property Investments Ltd | Real estate | 2020 |
| Rarecolt Ltd | Extraterritorial | 2024 |
| RAS Car Traders Limited | Wholesale & retail | 2018 |
| RAS Drive Limited | Transport & logistics | 2015 |
| RAS Infotech Ltd | Information & communication | 2023 |
| Rasapunitham Ltd | Wholesale & retail | 2026 |
| Rasar Estates Ltd | Real estate | 2025 |
| Rascasse Engineering Limited | Professional & scientific | 2025 |
| Rashta Limited | Information & communication | 2019 |
| Rasm Weddings Ltd | Other services | 2025 |
| Rate 1 Aero Limited | Administrative & support | 2017 |
| Rate My LOO Ltd | Information & communication | 2024 |
| Rathembo Limited | Health & social care | 2025 |
| Ratherfine Ltd | Manufacturing | 2022 |
| Rathore Consulting Limited | Wholesale & retail | 2014 |
| Raul Trans Ltd | Transport & logistics | 2025 |
| Raven Build Limited | Real estate | 2021 |
| Raven's Nest Café Ltd | Hospitality | 2024 |
| Raven's Nest Chelmsford Ltd | Wholesale & retail | 2022 |
| Ravijesh Limited | Real estate | 2019 |
| Ravish Nails Ltd | Other services | 2023 |
| Ravtech Limited | Real estate | 2009 |
| Rawley Developments Limited | Real estate | 2025 |
| Raygav Limited | Administrative & support | 2005 |
| Raylands House Ltd | Wholesale & retail | 2023 |
| Rayleigh Containers Limited | Administrative & support | 2021 |
| Rayleigh Trade Centre Limited | Wholesale & retail | 2021 |
| Rayment Recruitment Limited | Administrative & support | 1994 |
| Rayner Holdings Ltd | Professional & scientific | 2009 |
| Raynor Foods Limited | Manufacturing | 1999 |
| Raynor Foods Trustee Limited | Financial services | 2023 |
| Raynor Logistics Limited | Extraterritorial | 2020 |
| Rays Therapy Limited | Other services | 2019 |
| Raysoft Consulting Services Ltd. | Information & communication | 2006 |
| Razielaben Ltd | Health & social care | 2022 |
| Raziya Property Developers UK Ltd | Real estate | 2022 |
| Razvanmar Ltd | Health & social care | 2020 |
| RB Advisors Limited | Financial services | 2018 |
| RB Grain Limited | Wholesale & retail | 2024 |
| RB Social Management Limited | Information & communication | 2025 |
| RBA Training Limited | Professional & scientific | 2010 |
| RBM Mechanical Ltd | Construction | 2018 |
| RC AI Ltd | Professional & scientific | 2019 |
| RC Quantity Surveying Limited | Professional & scientific | 2024 |
| RC Technologies Ltd | Information & communication | 2018 |
| RCM Care Ltd. | Health & social care | 2015 |
| Rcube Technologies Limited | Information & communication | 2015 |
| RDA Develop Together Limited | Information & communication | 2019 |
| RDA U.K. Limited | Professional & scientific | 2019 |
| RDB Business Support Ltd | Professional & scientific | 2018 |
| Rdgb Limited | Public administration | 2022 |
| RDJ Consultants Ltd | Other services | 2012 |
| RDW Contracts Limited | Construction | 2006 |
| Reach Every Generation Homes Ltd | Real estate | 2025 |
| Reach Every Generation Ltd | Other services | 2016 |
| Reach Marketing Limited | Information & communication | 2018 |
| REACH247 Digital Ltd | Public administration | 2024 |
| React Plant Commercial Limited | Manufacturing | 2023 |
| React Theatre Co Ltd | Arts & recreation | 2026 |
| Readiness Collective Limited | Arts & recreation | 2025 |
| Ready Computing Limited | Professional & scientific | 2017 |
| Real Estate Finance Partners Limited | Professional & scientific | 2008 |
| Real Humankind Ltd. | Information & communication | 2023 |
| Real Mecoy Ltd | Wholesale & retail | 2020 |
| Real MEN Rosary Limited | Education | 2024 |
| Real Spirit Limited | Information & communication | 2005 |
| Real World Catering Limited | Hospitality | 2020 |
| Real-Leadership Limited | Administrative & support | 2020 |
| Realdata International Limited | Information & communication | 2020 |
| Reality 3D Ltd | Wholesale & retail | 2020 |
| Really Really Good Ltd | Professional & scientific | 2025 |
| Realm Construction & Development Limited | Construction | 2015 |
| Realm Holdings Limited | Financial services | 2025 |
| Realm Investment Properties Limited | Real estate | 2021 |
| Reawaken Limited | Manufacturing | 2014 |