| Roundtree Forestry Ltd | Agriculture & fishing | 2026 |
| Roundtripper Ltd | Information & communication | 2019 |
| Route to Your Soul Ltd | Administrative & support | 2025 |
| Routh Enterprise Limited | Information & communication | 2021 |
| Rovan AKO Ltd | Wholesale & retail | 2024 |
| Rovocta Ltd | Information & communication | 2020 |
| Rowan House Estates Ltd | Real estate | 2016 |
| Rowan House Holdings Ltd | Real estate | 2016 |
| Rowan Park Management Company Limited | Households | 2022 |
| Rowden House School Limited | Education | 1985 |
| Rowditch Furnishers Limited | Wholesale & retail | 1973 |
| Rower Dyne Freehold Ltd | Households | 2025 |
| Rowett Investments Limited | Real estate | 2022 |
| Rowney Construction Limited | Construction | 2022 |
| Roxbi Capital Finco Limited | Financial services | 2025 |
| Roxbi Capital Holdco Limited | Financial services | 2025 |
| Roxbi Capital Limited | Professional & scientific | 2022 |
| ROXLHV1FOURC Limited | Real estate | 2024 |
| ROY Power Limited | Hospitality | 2015 |
| Royaal Halal Meat Ltd | Wholesale & retail | 2023 |
| Royal School for the Deaf Derby | Education | 1997 |
| Royal Scot Carpet & Flooring Ltd | Construction | 2013 |
| Royston Crow YFL Limited | Arts & recreation | 2026 |
| RP Properties Derby Ltd | Real estate | 2026 |
| RPD Decorators Derby Ltd | Construction | 2023 |
| RPH GAS Limited | Construction | 2016 |
| RPI Holdings Ltd | Real estate | 2020 |
| RPJ Contracting Ltd | Professional & scientific | 2026 |
| RPN Echo Ltd | Health & social care | 2022 |
| RQ Engineering Services Ltd | Professional & scientific | 2019 |
| RR Access Ltd | Construction | 2021 |
| RR Bidco Limited | Administrative & support | 2025 |
| RR Capital Properties Ltd | Real estate | 2025 |
| RR Cloud Technologies Ltd | Information & communication | 2018 |
| RR Khadka Holdings Ltd | Financial services | 2025 |
| RR Khadka Limited | Real estate | 2025 |
| RR Khadka Properties Ltd | Real estate | 2025 |
| RR Lettings Limited | Real estate | 2016 |
| RR Midco Limited | Administrative & support | 2025 |
| RR Topco Limited | Administrative & support | 2025 |
| RRR Antony Ltd | Hospitality | 2025 |
| RRS Construction Ltd | Construction | 2022 |
| RS Automotive Consulting Ltd | Wholesale & retail | 2025 |
| RS Coaching Limited | Arts & recreation | 2018 |
| RS Construction Derby Ltd | Construction | 2026 |
| RS Hvac Ltd | Construction | 2026 |
| RS7 Ltd | Financial services | 2018 |
| RSB Holdings Ltd | Real estate | 2019 |
| RSB Residential Limited | Real estate | 2020 |
| RSB UK Transport Ltd | Transport & logistics | 2016 |
| Rsdg Solutions Ltd | Administrative & support | 2023 |
| RSF Property Investments Ltd | Construction | 2022 |
| RSH IT Services Ltd | Information & communication | 2015 |
| RSI Motor Specialists Ltd | Wholesale & retail | 2021 |
| Rsjm Investments Ltd | Real estate | 1999 |
| RSL Equine Limited | Professional & scientific | 2015 |
| RSM Performance Ltd | Wholesale & retail | 2020 |
| RSN Derby Ltd | Transport & logistics | 2024 |
| RSP Contractors (Derby) Limited | Manufacturing | 2017 |
| RSP Property Holdings Ltd | Real estate | 2020 |
| Rspqc Properties Limited | Real estate | 2025 |
| RSR Consultancy Services Limited | Professional & scientific | 2022 |
| RSR Consultants Limited | Professional & scientific | 2001 |
| RSS Building Ltd | Construction | 2025 |
| RSS Civils & Groundworks Ltd | Construction | 2020 |
| RSS Landscaping Ltd | Administrative & support | 2022 |
| RST Electrical Installations Ltd | Construction | 2020 |
| RST Solutions Ltd | Construction | 2024 |
| Rstar Services Ltd | Transport & logistics | 2024 |
| Rsvpo Limited | Financial services | 2024 |
| RT & AM Sread Ltd | Real estate | 2024 |
| RT Mycock & Sons Limited | Professional & scientific | 2006 |
| RTC Group PLC | Professional & scientific | 1990 |
| RTS (Midlands) Holdings Limited | Professional & scientific | 2014 |
| Rubab Kids Wear Limited | Wholesale & retail | 2025 |
| Ruben Singh Transport Limited | Transport & logistics | 2025 |
| Rubicon Search Ltd | Administrative & support | 2021 |
| Rubis Care Ltd | Health & social care | 2020 |
| Ruby (Eco) Ltd | Agriculture & fishing | 2026 |
| Ruby Bars Limited | Hospitality | 2024 |
| Ruby Bricks Limited | Real estate | 2022 |
| Ruby Property Investments Ltd | Real estate | 2023 |
| Rubylink Management Limited | Real estate | 2002 |
| Rubymae Hair & Beauty Ltd | Other services | 2026 |
| Rubys Healthcare Services Ltd | Health & social care | 2025 |
| Rubyx Properties Ltd | Real estate | 2024 |
| RUD Limited | Transport & logistics | 2023 |
| Ruddington (Holdings) Limited | Professional & scientific | 2019 |
| Ruddington Apartments Ltd | Health & social care | 2020 |
| Ruddington Build Co. Limited | Real estate | 2000 |
| Ruddington Homes Limited | Health & social care | 1985 |
| Rudyard Inclusive Paddle Sports CIC | Arts & recreation | 2025 |
| Rudzinski Ltd | Transport & logistics | 2016 |
| Rudzki and Jones Ltd | Professional & scientific | 2020 |
| RUE Amusement Lighting Limited | Wholesale & retail | 2016 |
| RUEDA21 Ltd | Real estate | 2021 |
| Rufaroservices Ltd | Health & social care | 2022 |
| Rufus Wren Ltd | Professional & scientific | 2024 |
| Rukh London Ltd | Professional & scientific | 2025 |
| Rumaan Zayyan Limited | Hospitality | 2018 |