| Ricalg Ltd | Households | 2024 |
| Rich KID Ltd | Wholesale & retail | 2025 |
| Rich Moore Engineering Ltd | Professional & scientific | 2024 |
| Rich Tea Media Limited | Professional & scientific | 2020 |
| Rich-Transport Limited | Transport & logistics | 2025 |
| Richard S Sharman Ltd | Real estate | 2016 |
| Richedo International Limited | Professional & scientific | 2015 |
| Richer Solutions Limited | Professional & scientific | 2020 |
| Ricky JNR Limited | Health & social care | 2022 |
| Ridding Close Corby Ltd | Real estate | 2023 |
| Ridgetec Ltd | Construction | 2020 |
| Ridlington Barns Ltd | Construction | 2020 |
| Right Track Engineering Ltd | Professional & scientific | 2025 |
| Rightable Limited | Information & communication | 1988 |
| Rika Elite Ltd | Wholesale & retail | 2024 |
| Rishy Limited | Wholesale & retail | 2015 |
| Rising Star Studios Limited | Arts & recreation | 2014 |
| Rita Refurb Ltd | Manufacturing | 2024 |
| Rita Stupele Ltd | Extraterritorial | 2023 |
| River General Consultancy Services Ltd | Administrative & support | 2018 |
| Rivers Care Ltd | Health & social care | 2015 |
| Riverside Promotional Ltd | Information & communication | 2022 |
| Rivertove Limited | Construction | 2007 |
| RJ Waters Services Ltd | Transport & logistics | 2025 |
| RJB Heating & Plumbing Limited | Construction | 2024 |
| Rjhanys Ltd | Transport & logistics | 2024 |
| RKI Ventures Limited | Hospitality | 2025 |
| RL Events Management Limited | Hospitality | 2019 |
| RM Design Construct Ltd | Construction | 2021 |
| RM Snagging Ltd | Wholesale & retail | 2024 |
| RMA Mechanics Ltd | Manufacturing | 2021 |
| RMD Property Management 2014 Limited | Hospitality | 2015 |
| RMD Trading Limited | Wholesale & retail | 2018 |
| RMS Health Ltd | Health & social care | 2025 |
| RNS Transport Ltd | Transport & logistics | 2018 |
| RO Garage Limited | Wholesale & retail | 2026 |
| Roache Group Ltd | Financial services | 2019 |
| Roamlite Ltd | Wholesale & retail | 2011 |
| ROB Barber Ltd | Other services | 2024 |
| Robert Bieniasz Ltd | Other services | 2015 |
| Roberto Transport Limited | Transport & logistics | 2017 |
| Robinsons Autologistics Limited | Transport & logistics | 2009 |
| Robinsons Driven Logistics Limited | Transport & logistics | 2017 |
| Robinsons Fleet Solutions Limited | Transport & logistics | 2013 |
| Robinsons Logistics Group Limited | Transport & logistics | 2012 |
| Robinsons Warehouse & Distribution Services Limited | Transport & logistics | 2015 |
| Rockcat Limited | Hospitality | 2026 |
| Rocket Fibre (E1) Ltd | Information & communication | 2023 |
| Rocket Fibre Civils Ltd | Construction | 2023 |
| Rocket Fibre Ltd | Information & communication | 2020 |
| Rockingham Cars Limited | Wholesale & retail | 1978 |
| Rockingham Developments Limited | Construction | 2004 |
| Rockingham Forest Osteopaths Limited | Other services | 2015 |
| Rockingham Forest Wellbeing Limited | Other services | 2021 |
| Rockingham Joinery Limited | Manufacturing | 2005 |
| Rockingham Performance Limited | Wholesale & retail | 2015 |
| Rocky Express Ltd | Wholesale & retail | 2013 |
| Rocky's Express (Studfall Avenue) Ltd | Wholesale & retail | 2021 |
| Rodis GV Ltd | Transport & logistics | 2026 |
| Rohoboth Enterprise Limited | Health & social care | 2018 |
| Roland Sava Ltd | Transport & logistics | 2016 |
| Rolip Ltd | Construction | 2025 |
| Rolling Heads Limited | Information & communication | 2021 |
| Roman Kempny Driving Services Limited | Transport & logistics | 2007 |
| Roman Wite Limited | Financial services | 2020 |
| Romanian Barbeque Lenuta&Gabriel Ltd | Hospitality | 2022 |
| Romfilms Limited | Extraterritorial | 1999 |
| Romlogistic Ltd | Transport & logistics | 2024 |
| Ronaldo Transport Ltd | Transport & logistics | 2021 |
| Rosecut Limited | Professional & scientific | 1977 |
| Rosie Media Limited | Professional & scientific | 2026 |
| Rosiva Ltd | Health & social care | 2021 |
| Ross Group Holdings Ltd | Financial services | 2019 |
| Ross Wallace Landscapes Limited | Professional & scientific | 2013 |
| Rosser Limited | Professional & scientific | 2011 |
| Rosses Point Labelling Limited | Manufacturing | 2010 |
| Rotary Property Solutions Limited | Real estate | 2025 |
| Rotherby Manor Management Company Limited | Households | 2021 |
| Routewave Ltd | Transport & logistics | 2026 |
| Rowland Care PHD Limited | Health & social care | 2021 |
| Rowstargate Ltd | Transport & logistics | 2017 |
| Roykay Ltd | Health & social care | 2013 |
| RPC Asia Pacific Holdings Limited | Financial services | 2014 |
| RPC Containers Limited | Manufacturing | 1993 |
| RPC Group Limited | Professional & scientific | 1991 |
| RPC Packaging Holdings Limited | Financial services | 1996 |
| RPC Pisces Holdings Limited | Professional & scientific | 2014 |
| RPD Estates Limited | Real estate | 2020 |
| RS Cars Mobile Mechanic Limited | Manufacturing | 2023 |
| RS Components Limited | Wholesale & retail | 1971 |
| RS Snela Ltd | Wholesale & retail | 2023 |
| Rsjh Property Limited | Real estate | 2021 |
| RSM (IT) Limited | Information & communication | 2015 |
| RTK Precision Ltd | Agriculture & fishing | 2024 |
| Ruby Mear Photographic Limited | Other services | 1997 |
| Ruby Mear Promotions Limited | Other services | 1985 |
| Rubydew Limited | Wholesale & retail | 2019 |
| Ruchcare Ltd | Health & social care | 2020 |
| Rulmeca UK Limited | Manufacturing | 1986 |
| Rumbidzai Ratidzo Ltd | Health & social care | 2014 |