| RGU Logistics Limited | Transport & logistics | 2022 |
| Rgwl Business Development Ltd | Transport & logistics | 2011 |
| Rgxtra Solutions Limited | Financial services | 2025 |
| RH Davey Hire Services Limited | Administrative & support | 2014 |
| RH Davey Holdings Limited | Financial services | 2014 |
| RH Davey Welding Supplies Limited | Wholesale & retail | 2014 |
| RH Painting & Decorating Ltd | Construction | 2019 |
| Rhain's Diner Ltd | Hospitality | 2023 |
| RHB Southampton Ltd | Real estate | 2024 |
| Rhendra Mechanical Services Ltd | Construction | 2025 |
| RHH Coaching Ltd | Professional & scientific | 2025 |
| RHL Carpentry & Landscaping Ltd | Construction | 2024 |
| RHM Capital Limited | Financial services | 2018 |
| Rhoad & Sons MOT & Services Limited | Wholesale & retail | 2020 |
| Rhodes Skincare Limited | Wholesale & retail | 2004 |
| Rhodfa'R EOS (Swansea) Management Company Limited | Households | 1984 |
| Rhombus Bespoke Solutions Limited | Information & communication | 2021 |
| RI Boat Care Ltd | Administrative & support | 2022 |
| RI Fabrication Ltd | Professional & scientific | 2022 |
| RIA Mini Mart Ltd | Wholesale & retail | 2016 |
| Riaa General Trading Limited | Wholesale & retail | 2020 |
| Riann Care Ltd | Health & social care | 2012 |
| RIB Consultants Limited | Manufacturing | 2016 |
| RIB Draughting Limited | Professional & scientific | 2004 |
| RIB Investments Limited | Professional & scientific | 2011 |
| RIB Shop Ltd | Manufacturing | 2004 |
| Rib-X International Ltd | Transport & logistics | 2016 |
| Ribbonfish Limited | Information & communication | 2007 |
| Ricardo Ukcars Ltd | Wholesale & retail | 2025 |
| Ricaud Property Limited | Real estate | 2017 |
| Ricchetto Law Ltd | Professional & scientific | 2021 |
| Rich-Ish Ltd | Wholesale & retail | 2025 |
| RICH1 Ltd | Real estate | 2022 |
| Richard Courtney Limited | Wholesale & retail | 1966 |
| Richard Cozens Landscaping Limited | Administrative & support | 2011 |
| Richard Crane Associates Limited | Professional & scientific | 1998 |
| Richard Floyd Crane Lifting Services Ltd | Construction | 2014 |
| Richard Foster Carpentry Limited | Construction | 2001 |
| Richard Fowler Property LLP | | 2018 |
| Richard Grove Tipper Hire Limited | Transport & logistics | 2003 |
| Richard Lewis Communications Limited | Education | 1989 |
| Richard Mills Commercial Vehicle Services Ltd | Wholesale & retail | 2025 |
| Richard Willats Ltd | Information & communication | 2025 |
| Richard Woods Composite Management Limited | Manufacturing | 2017 |
| Richards Urban Design Ltd | Professional & scientific | 2011 |
| Richardson Brick Solutions Ltd | Wholesale & retail | 2024 |
| Richardson Originals Ltd | Manufacturing | 2019 |
| Richardson Painting Contractors Ltd | Construction | 2013 |
| Richardson Psychological Consultation Limited | Health & social care | 2017 |
| Richardson Recruit Ltd | Administrative & support | 2025 |
| Richglo Consultants Limited | Other services | 2017 |
| Richi Express Ltd | Transport & logistics | 2017 |
| Richmo Limited | Other services | 1994 |
| Richmond Canine Hydrotherapy Centre Ltd | Professional & scientific | 2014 |
| Richmond Cars (Astolat) Limited | Wholesale & retail | 2019 |
| Richmond Cars (Bognor Regis) Limited | Professional & scientific | 2000 |
| Richmond Cars (Botley) Ltd | Wholesale & retail | 1997 |
| Richmond Cars (Fareham) Ltd | Wholesale & retail | 2002 |
| Richmond Cars (Guildford) Limited | Wholesale & retail | 2013 |
| Richmond Cars (Southampton) Limited | Wholesale & retail | 1999 |
| Richmond Cars Limited | Wholesale & retail | 1994 |
| Richmond Court (Southampton) Management Limited | Households | 1999 |
| Richmond Property Developments (Portsmouth) Limited | Construction | 2015 |
| Richmond Property Holdings (Portsmouth) Limited | Real estate | 2016 |
| Richmond QA Consultancy Limited | Professional & scientific | 2020 |
| Richsam Ltd | Health & social care | 2021 |
| Rick Motorcycles Ltd | Wholesale & retail | 2024 |
| Rick Tomlinson Photography Ltd | Professional & scientific | 2009 |
| Ricky Martin Electrical Limited | Wholesale & retail | 2000 |
| Riddett & Co Ltd | Health & social care | 2016 |
| Ride Airport Cars Limited | Transport & logistics | 2026 |
| Ridenow Limited | Transport & logistics | 2024 |
| Rider Court Management Company Limited | Administrative & support | 1983 |
| Ridereport Insights Limited | Wholesale & retail | 2025 |
| Rideride Cycle Workshop Ltd | Manufacturing | 2024 |
| Ridewell Limited | Professional & scientific | 2017 |
| Ridgeway Property (Portchester) Limited | Real estate | 2023 |
| Ridgway Car Sales Limited | Wholesale & retail | 2017 |
| Ridgy Didge Ltd | Professional & scientific | 2015 |
| Ridon Holding Co Limited | Professional & scientific | 2007 |
| Ridon Joinery Limited | Construction | 1977 |
| Ridon Specialist Finishing Limited | Professional & scientific | 2011 |
| Riemarda Dogs Limited | Agriculture & fishing | 2025 |
| RIG Lite Design Ltd | Professional & scientific | 2022 |
| RIG1GROUP Ltd | Professional & scientific | 2025 |
| Rigby Smith Property Ltd | Real estate | 2024 |
| Rigging Projects Holdings Limited | Professional & scientific | 2021 |
| Rigging Projects Ltd | Manufacturing | 2014 |
| Rigging Projects Machining Limited | Extraterritorial | 2011 |
| Right Autos Limited | Wholesale & retail | 2020 |
| Right Plan Financial Services Limited | Financial services | 2013 |
| Right Property Holdings Limited | Households | 2023 |
| Right Response Limited | Information & communication | 1996 |
| Right to BE Safe Ltd | Professional & scientific | 2024 |
| Rightboat Ltd | Administrative & support | 2006 |
| Rightstaff UK Agency Ltd | Administrative & support | 2018 |
| Rightszone Limited | Information & communication | 2017 |
| Rightview Home Renovations Ltd | Construction | 2025 |
| Rightview Windows & Conservatories LLP | | 2017 |
| Rigid Security Limited | Administrative & support | 2022 |