| Reverie Candles Ltd | Manufacturing | 2023 |
| Revfusion Ltd | Wholesale & retail | 2025 |
| Revhaus Ltd | Wholesale & retail | 2025 |
| Revilo Twist Events Limited | Arts & recreation | 2026 |
| Revitaliseaestheticsacademy Limited | Health & social care | 2024 |
| Revive & Reno Limited | Construction | 2024 |
| Revive and Refresh Detailing Ltd | Professional & scientific | 2023 |
| Revive Dental Care Limited | Health & social care | 2006 |
| Revive Media Limited | Manufacturing | 2017 |
| Revive Residential Ltd | Real estate | 2025 |
| Revive Supported Living Services Ltd | Health & social care | 2019 |
| Revive-Restore Limited | Health & social care | 2026 |
| Revobim Limited | Professional & scientific | 2023 |
| Revolex Ltd | Construction | 2019 |
| Revolution Driver Recruitment Solutions Limited | Administrative & support | 2004 |
| Revolution Racing Ltd | Manufacturing | 2024 |
| Revolution Radio Limited | Information & communication | 2020 |
| Revolution RTI Limited | Professional & scientific | 2022 |
| Revolve London Ltd | Hospitality | 2019 |
| REW Reynolds Limited | Manufacturing | 2015 |
| Reward Energy Ltd | Wholesale & retail | 2015 |
| Reward Network Limited | Administrative & support | 2011 |
| Reward-It Limited | Information & communication | 2012 |
| Rewards and Perks Limited | Professional & scientific | 2022 |
| Rewear Clothing Limited | Wholesale & retail | 2023 |
| Rewind Entertainment Limited | Professional & scientific | 2015 |
| REX J. Woodgate Automotive Consultants Limited | Wholesale & retail | 2003 |
| REY Properties Ltd | Real estate | 2018 |
| Reynco Ltd | Administrative & support | 2025 |
| Reynolds Accountants Limited | Professional & scientific | 2004 |
| RF Management Limited | Construction | 2015 |
| RFI Business Limited | Information & communication | 2025 |
| RFS Delivery Ltd | Transport & logistics | 2023 |
| RG Communications Ltd | Information & communication | 2025 |
| RG Driving Ltd | Transport & logistics | 2015 |
| RG Facilities Services Limited | Administrative & support | 2023 |
| RG Law Ltd | Professional & scientific | 2020 |
| RG Sport Racing Team Ltd | Manufacturing | 2014 |
| Rgaarg Ltd | Real estate | 2025 |
| RGB P & C Limited | Construction | 2000 |
| RGC Trans Ltd | Transport & logistics | 2018 |
| RGS Care Limited | Health & social care | 2025 |
| RGS Technical and Engineering Services Limited | Wholesale & retail | 2013 |
| Rhasul Legal Services Limited | Other services | 2020 |
| Rhasul LS Limited | Other services | 2026 |
| Rhema Derm Ltd | Wholesale & retail | 2026 |
| Rhino Analytics Limited | Information & communication | 2018 |
| Rhino Artificial Grass Ltd | Administrative & support | 2024 |
| Rhino Fabrications (Eastcote) Limited | Manufacturing | 2021 |
| Rhino Fabrications Ltd | Manufacturing | 2015 |
| Rhino Heavy Haulage Ltd | Transport & logistics | 2025 |
| Rhino Landscaping Limited | Construction | 2020 |
| Rhmn Holdings Ltd | Real estate | 2024 |
| Rhoda Thomas Bookkeeping and Legal Cashiering Ltd | Professional & scientific | 2017 |
| Rhodes Roofing & Energy Solutions Limited | Construction | 2023 |
| RHT Cleaning Ltd | Administrative & support | 2021 |
| Rhuksana Properties Ltd | Real estate | 2020 |
| RI (Northampton) Limited | Construction | 2017 |
| RI Management Services Limited | Construction | 2021 |
| RIA Holding Enterprises Ltd | Real estate | 2023 |
| Riaz Brothers and Associates Limited | Real estate | 1999 |
| Riaz Marketplace Limited | Wholesale & retail | 2025 |
| Ribbon Box Gifts Limited | Wholesale & retail | 2023 |
| Ribs & Rump Ltd | Hospitality | 2017 |
| Riccosent Electrical and Building Maintenance Ltd | Other services | 2024 |
| Rich Bay Healthcare Ltd | Health & social care | 2019 |
| Rich Faulkner Electrical Ltd | Construction | 2022 |
| Rich Wilson Ltd | Wholesale & retail | 2022 |
| Richard Berry Designs Limited | Professional & scientific | 2016 |
| Richard Clarke & Co (at Your Service) Ltd | Professional & scientific | 2018 |
| Richard Greener Estate Agents Ltd | Real estate | 2009 |
| Richard Smith Agencies Limited | Professional & scientific | 2021 |
| Richard Wake Holdings Limited | Financial services | 2026 |
| Richardsapex Europe Limited | Wholesale & retail | 1991 |
| Richardson Queens House Limited | Health & social care | 2022 |
| Richden Developments Ltd | Real estate | 2018 |
| Richemele International Consultants Limited | Professional & scientific | 2026 |
| Richer View Media Production Limited | Information & communication | 2007 |
| Richmond & SON Engineering Ltd | Professional & scientific | 2019 |
| Richmond Build Limited | Construction | 2023 |
| Richmond International Holdings Limited | Financial services | 2025 |
| Richmond International Limited | Professional & scientific | 1994 |
| Richmonds Group Limited | Information & communication | 2025 |
| Richter Associates (Bedford) Limited | Professional & scientific | 2020 |
| Richter Associates (London) Limited | Professional & scientific | 2020 |
| Richter Associates (Northern) Limited | Professional & scientific | 2012 |
| Richter Associates (Redhill) Limited | Financial services | 2019 |
| Richter Associates (Warrington) Limited | Professional & scientific | 2020 |
| Richvive Ltd | Hospitality | 2010 |
| Rickard Interiors (Gloucester) Limited | Construction | 2018 |
| Rickeast Ltd | Transport & logistics | 2019 |
| Rickyard Management Services Limited | Professional & scientific | 2013 |
| Rickyard Walk Management Company Limited | Households | 2003 |
| Rico Events Limited | Hospitality | 2024 |
| Ricoh UK Limited | Information & communication | 1976 |
| Ride Drive Store Limited | Wholesale & retail | 2019 |
| Ride Lane House Trading Limited | Wholesale & retail | 2011 |
| Ridel Limited | Wholesale & retail | 2003 |
| Ridge Line Projects Limited | Construction | 2017 |
| Ridge Management and Consultancy Limited | Professional & scientific | 2025 |