| Roshka R&I Ltd | Real estate | 2026 |
| Roshni Savjani Ltd | Professional & scientific | 2023 |
| Rosie Living Limited | Administrative & support | 2021 |
| Ross Busby Limited | Information & communication | 2016 |
| Rossco Carpentry & Kitchens Ltd | Manufacturing | 2025 |
| Rostar Trans Ltd | Transport & logistics | 2017 |
| Rostephi Limited | Real estate | 1995 |
| Rothbadi Holdings Limited | Households | 2019 |
| Rotherham Surfacing Limited | Construction | 1998 |
| Rothersthorpe Ltd | Professional & scientific | 2026 |
| Rothwell Land Limited | Construction | 2006 |
| Rothwell UK Limited | Wholesale & retail | 2008 |
| Rothwell Valeting Centre Limited | Other services | 2017 |
| Rotomotive Ltd | Professional & scientific | 2006 |
| Round Properties Limited | Real estate | 2011 |
| Round Spinney Mot’S Ltd | Wholesale & retail | 2026 |
| Rounds Cars Limited | Transport & logistics | 2021 |
| Roundstone Builders Limited | | 1990 |
| Route 1 Express Couriers Limited | Transport & logistics | 2012 |
| Route 1 Fulfilment Limited | Other services | 2013 |
| Route 1 Group Holdings Limited | Financial services | 2015 |
| Route 1 Recruitment Northampton Limited | Transport & logistics | 2016 |
| Route 44 Logistics Ltd | Transport & logistics | 2018 |
| Routeridge Ltd | Transport & logistics | 2025 |
| Routex Shipping Ltd | Transport & logistics | 2026 |
| Rovell Electrical Ltd | Construction | 2018 |
| Rover P5 Club | Other services | 2004 |
| Rovique Limited | Wholesale & retail | 2026 |
| Rowan Co Investments Ltd | Real estate | 2025 |
| Rowland Spray Team Limited | Construction | 2021 |
| Rowlands Hatch Ltd | Real estate | 2015 |
| Rowlands Paving Ltd | Construction | 2016 |
| Rowles Property Ltd | Real estate | 2024 |
| Roxanne’S Hair Boutique Ltd | Other services | 2020 |
| Roxburgh Construction Limited | Administrative & support | 2007 |
| Roxessential Ltd | Other services | 2025 |
| Roxton Residents Management Company Limited | Real estate | 2023 |
| ROY Brothers Properties Limited | Real estate | 2002 |
| ROY Leeding Developments Limited | Construction | 1988 |
| Royal Terrace Management Company Limited | Households | 2006 |
| Royale Care Services Limited | Health & social care | 2017 |
| Royel Logistics Ltd | Transport & logistics | 2024 |
| Royessa Foods Limited | Hospitality | 2025 |
| Royton Limited | Health & social care | 2015 |
| Rozzy's Nail & Beauty Studio Limited | Other services | 2023 |
| RP & Co Services Limited | Health & social care | 2014 |
| RP Maan Limited | Wholesale & retail | 2018 |
| RP1 Build Ltd | Construction | 2018 |
| RPB (Northampton) Limited | Construction | 2006 |
| RPC Haulage Limited | Administrative & support | 2014 |
| RPG Strategy Partners Ltd | Professional & scientific | 2023 |
| RPH Project Solutions Ltd | Professional & scientific | 2012 |
| RPL (1983) Limited | Manufacturing | 1983 |
| RPM Bikes Ltd | Wholesale & retail | 2017 |
| RPM Garages Limited | Wholesale & retail | 2012 |
| RPM Properties Ltd | Real estate | 2024 |
| Rpva Ltd | Administrative & support | 2024 |
| RR Captial Ltd | Financial services | 2025 |
| RR COV Limited | Hospitality | 2019 |
| RR Data Ltd | Construction | 2019 |
| Rray Ventures Ltd | Other services | 2018 |
| RRR Creators Limited | Hospitality | 2024 |
| RRS Asset Management Ltd | Professional & scientific | 2024 |
| Rrushi Limited | Manufacturing | 2024 |
| RS Aspire Properties Ltd | Real estate | 2023 |
| RS Circular Ltd | Construction | 2020 |
| RS Construct Ltd | Construction | 2021 |
| RS Construction and Build Ltd | Construction | 2025 |
| RS Elite Consulting Limited | Professional & scientific | 2023 |
| RS Fresh Food Ltd | Hospitality | 2025 |
| RS Innovators Ltd | Information & communication | 2025 |
| RS Metrology Ltd | Professional & scientific | 2017 |
| RS Project Controls Ltd | Construction | 2026 |
| RS Property (Northants) Limited | Real estate | 2016 |
| RS Property Associates Limited | Real estate | 2024 |
| RS Sales Agency Limited | | 2005 |
| RSB Ceilings Limited | Construction | 2023 |
| RSB Fire Protection Ltd | Construction | 2009 |
| RSB UK Consulting Ltd | Financial services | 2016 |
| RSC Body Shop Ltd | Wholesale & retail | 2020 |
| RSC Trader Ltd | Wholesale & retail | 2019 |
| RSJ Property Developments Ltd | Construction | 2025 |
| RSP Global Limited | Professional & scientific | 2021 |
| RSR Historic Engineering Ltd | Professional & scientific | 2015 |
| RSS Transport Ltd | Transport & logistics | 2022 |
| RST Consultancy and Management Services Limited | Professional & scientific | 2021 |
| RT Brand Communications Limited | Professional & scientific | 2003 |
| RT46 Customs Limited | Extraterritorial | 2025 |
| RT46 Limited | Extraterritorial | 2025 |
| RTA Property Ltd | Real estate | 2022 |
| Rtan Wholesale Limited | Wholesale & retail | 2011 |
| Rtge Services Limited | Administrative & support | 2021 |
| Rtht Construction Ltd | Construction | 2022 |
| RTN2 App Ltd | Information & communication | 2020 |
| RTP Groundworks Limited | Construction | 2017 |
| RTR Homes Ltd | Real estate | 2025 |
| RTS EOT Ltd | Professional & scientific | 2024 |
| RTW Mineral Water Limited | Manufacturing | 2023 |
| RTW Printers Ltd | Manufacturing | 2019 |
| RU Foods Ltd | Hospitality | 2023 |