| Rafflegate Limited | Real estate | 1986 |
| Rafpio Ltd | Extraterritorial | 2018 |
| Rainbow 2 Ltd | Administrative & support | 2007 |
| Rainbow Crowe Limited | Manufacturing | 2020 |
| Rainbow Fields (Waddicar) Management Company Limited | Real estate | 2019 |
| Raison Consultants Limited | Administrative & support | 2025 |
| Ralconsulting Limited | Professional & scientific | 2022 |
| Raleigh Property Transformations Limited | Construction | 2012 |
| Ralp Campbell Ltd | Health & social care | 2019 |
| RAM Advisory Group Ltd | Professional & scientific | 2026 |
| Ramleaze Drive (Salisbury) Management Company Limited | Households | 1990 |
| Ramparts Salisbury Limited | Construction | 2019 |
| Ramridge Park Drive Limited | Real estate | 1996 |
| Ramridge Park Sewerage Association Limited | Water & waste | 2016 |
| Ramtrans Ltd | Transport & logistics | 2019 |
| Rangers (Durrington) Limited | Manufacturing | 2015 |
| Rare Electrical Limited | Construction | 2023 |
| Rare Spark Limited | Professional & scientific | 2025 |
| Rare Tone Records Limited | Information & communication | 2014 |
| Rascals Close Management Limited | Households | 2013 |
| Rasch Trustees Limited | Professional & scientific | 2019 |
| Raspberry Property Limited | Professional & scientific | 2005 |
| RAU Transport Ltd | Transport & logistics | 2017 |
| RAW Asset Holdings Ltd | Real estate | 2026 |
| RAW Motorsport Limited | Wholesale & retail | 2009 |
| RAW Publicity Limited | Professional & scientific | 2015 |
| Rawlence & Browne Ltd | Professional & scientific | 1996 |
| Rawlence & Browne UDY Limited | Professional & scientific | 2018 |
| Rawsafe Ltd. | Administrative & support | 2020 |
| RAY Bartlett & Numeric Associates Limited | Professional & scientific | 2024 |
| RAY Bartlett (South West) Limited | Professional & scientific | 2001 |
| Razor Barber 1 Ltd | Other services | 2019 |
| Rcbitz Limited | Wholesale & retail | 2012 |
| RCG Group Ltd | Wholesale & retail | 2011 |
| RCR Vehicle Services Ltd | Wholesale & retail | 2017 |
| RCW Drylining Ltd | Construction | 2024 |
| RD Offices Number 4 Limited | Real estate | 2023 |
| RD Offices Number 6 Limited | Real estate | 2023 |
| RD Offices Number 8 Limited | Real estate | 2023 |
| RD Offices Number 9 Limited | Real estate | 2023 |
| RD VA Ltd | Administrative & support | 2025 |
| RDB Carpentry Ltd | Manufacturing | 2025 |
| Re-Palm Health Ltd | Health & social care | 2024 |
| REA Lane (Hempsted) Management Company Limited | Households | 2021 |
| Readers Retreat (Hay-On-Wye) Residents Management Company Limited | Households | 2017 |
| Reading Fairy Global Limited | Education | 2016 |
| Readyadvance Property Management Limited | Households | 1993 |
| Really Commercial Limited | Financial services | 2007 |
| Really Great Gardens Limited | Administrative & support | 2012 |
| Rebecca Ford Eyes Limited | Health & social care | 2024 |
| Rebecca Hilliard & Co Ltd | Administrative & support | 2022 |
| Rebort Engineering Limited | Professional & scientific | 2022 |
| REC Project Management Limited | Construction | 2015 |
| Reck Estates Limited | Real estate | 2021 |
| Rectory Gardens (Balcombe) Management Company Limited | Households | 2025 |
| Rectory Road (Rochford) Residents Association Limited | Households | 2012 |
| Recycling Blondie Ltd | Arts & recreation | 2024 |
| Red Berry Holdings Ltd | Real estate | 2026 |
| Red Hamper Ltd | Wholesale & retail | 2018 |
| Red Heating Ltd | Construction | 2024 |
| Red Herring Corporate Catering Limited | Hospitality | 2004 |
| Red House Residents Association Limited(The) | Real estate | 1981 |
| Red Kite Cyber Security Limited | Information & communication | 2022 |
| Red Lake Property Ltd | Real estate | 2020 |
| Red Lion Investments Limited | Financial services | 2000 |
| Red Noise Limited | Wholesale & retail | 2001 |
| Red Rust Music Ltd | Information & communication | 2015 |
| Red Shoot LLP | | 2021 |
| Red Viking Rail Limited | Professional & scientific | 2011 |
| RED2VIOLET Limited | Professional & scientific | 2014 |
| RED5 Artist Management Limited | Professional & scientific | 2015 |
| Redhall Gardens Residents Management Company Limited | Households | 2015 |
| Redjacket Specialist Care Ltd | Health & social care | 2016 |
| Redkar Limited | Information & communication | 2020 |
| Redlynch Ltd | Professional & scientific | 2014 |
| Redrame Recruitment Limited | Administrative & support | 2016 |
| Redstone Lettings Limited | Wholesale & retail | 2001 |
| Reeve the Baker Limited | Manufacturing | 1987 |
| Reflect Road Safety Consultancy Limited | Other services | 2009 |
| Reflections Print Finishers Limited | Manufacturing | 2011 |
| Refurbishedlaptops Ltd | Information & communication | 2019 |
| Regency Recruitment Ltd | Administrative & support | 2020 |
| Regency Village (Wantage) Management Company Limited | Households | 2014 |
| Regent Tailoring Ltd | Wholesale & retail | 2006 |
| Regent's Park Cardiovascular Solutions Ltd | Administrative & support | 2002 |
| Regent's Park Healthcare Limited | Health & social care | 2014 |
| Regent's Park Heart Clinics Ltd | Health & social care | 2009 |
| Regent's Park Staffing Limited | Health & social care | 2015 |
| Regional Environmental Services Limited | Other services | 2004 |
| Regis Park (Sefter Road) Management Company Limited | Households | 2022 |
| Rehayes Ltd | Administrative & support | 2023 |
| Rehoboth Properties Management Ltd | Real estate | 2024 |
| Reids Tackle Limited | Wholesale & retail | 2004 |
| Relentless HQ Boxing & Fitness Ltd | Arts & recreation | 2023 |
| Remarkable Drinks Limited | Manufacturing | 2022 |
| Remembird Limited | Other services | 2025 |
| Remote FD Ltd | Professional & scientific | 2020 |
| Remotely Piloted Aircraft Ltd | Professional & scientific | 2011 |
| Remtech (Computer Security) Limited | Manufacturing | 1991 |
| Remus Zamfir Ltd | Administrative & support | 2025 |