| Redmart Limited | Hospitality | 2018 |
| Redmoco Ltd | Professional & scientific | 2009 |
| Rednav Services Ltd | Construction | 2014 |
| Rednum Ltd | Administrative & support | 2011 |
| Redrisu Ltd | Wholesale & retail | 2025 |
| Redrock Investment Group Ltd | Real estate | 2020 |
| Reds Builders Limited | Construction | 2002 |
| Redtech Solutions Limited | Information & communication | 2009 |
| Redvark Publishing Limited | Information & communication | 2021 |
| Reece Blake Marsh Solutions Ltd | Financial services | 2018 |
| Reeds News Limited | Wholesale & retail | 2015 |
| Reef-Geeks Ltd | Agriculture & fishing | 2016 |
| Reeling Systems Holdings Limited | Financial services | 2020 |
| Reeling Systems Limited | Manufacturing | 1990 |
| Reemax Ltd | Health & social care | 2018 |
| Reeva Locksmiths and Maintenance Limited | Construction | 2021 |
| Reeves Logistics Limited | Transport & logistics | 2013 |
| Reezee Collection Ltd | Wholesale & retail | 2025 |
| Reflection Services Limited | Administrative & support | 2018 |
| Reframe to Sustain Limited | Other services | 2024 |
| Refstech Ltd | Wholesale & retail | 2022 |
| Refurbferg Home Improvements Ltd | Construction | 2026 |
| Refurbferg Property Ltd | Construction | 2026 |
| Reg's Rubbish LLP | | 2002 |
| Regal Construction Group South Limited | Financial services | 2025 |
| Regal Construction South Limited | Construction | 2025 |
| Regal Glass and Glazing Limited | Construction | 2024 |
| Regal Refurbishment Ltd | Construction | 2026 |
| Regency Court "Old Portsmouth" Ltd | Hospitality | 1998 |
| Regency Enterprises Ltd | Real estate | 2021 |
| Regents Gate (Northampton) Management Company Limited | Extraterritorial | 2003 |
| Rego Limited | Health & social care | 2020 |
| Rehabilitate Your Fitness Limited | Arts & recreation | 2015 |
| Rehan Ahmed Properties Limited | Extraterritorial | 2024 |
| Rehan Khan Ltd | Administrative & support | 2024 |
| Rehan Properties (Southern) Limited | Extraterritorial | 2024 |
| Rehman&Raza Limited | Manufacturing | 2024 |
| Reign Industrial Ltd | Administrative & support | 2021 |
| Reign Southern Ltd | Administrative & support | 2026 |
| Reign Windows Ltd | Administrative & support | 2022 |
| Rekab (Sussex) Ltd | Real estate | 2020 |
| Reklaw Surfacing Ltd | Construction | 2019 |
| Reliable Care Agency Limited | Health & social care | 2023 |
| Relm Landscapes Limited | Administrative & support | 2021 |
| Relm Property Solutions Limited | Real estate | 2024 |
| Relsah Productions Limited | Information & communication | 2017 |
| REM DRY Lining Ltd | Construction | 2021 |
| Rem's Leisure Ltd | Hospitality | 2025 |
| Remarkable Decorating Limited | Construction | 2017 |
| Remas HDG Ltd | Manufacturing | 2011 |
| Remens Vogue Ltd | Wholesale & retail | 2025 |
| Remote Court Users Limited | Professional & scientific | 2021 |
| Remote Court Users Worldwide Limited | Professional & scientific | 2020 |
| Renew Serv UK Ltd | Administrative & support | 2026 |
| Renew YOU (IOW) Limited | Other services | 2024 |
| Renewable Energy Savings Ltd | Professional & scientific | 2011 |
| Renewable Roofing Ltd | Construction | 2024 |
| Rent a Roost Limited | Real estate | 2023 |
| Renta Blox Limited | Administrative & support | 2012 |
| Rentarc Limited | Administrative & support | 2010 |
| Rentech Limited | Wholesale & retail | 2005 |
| Rented Rooms Limited | Real estate | 2014 |
| REP Social Ltd | Health & social care | 2026 |
| Repanos Properties Limited | Real estate | 2018 |
| Republish Ltd | Information & communication | 2023 |
| RER Rail Ltd | Professional & scientific | 2016 |
| Reshwill Consultancy Ltd | Administrative & support | 2014 |
| Resolved Solutions Ltd | Other services | 2024 |
| Resolvio Ltd | Wholesale & retail | 2023 |
| Respiaction CIC | Education | 2018 |
| Respondal Limited | Information & communication | 2025 |
| Restaurant Slemany Ltd | Hospitality | 2024 |
| Restore and Flow Wellness Ltd | Other services | 2026 |
| Retail Advance Solutions Ltd | Wholesale & retail | 2018 |
| Retail Comm Solutions Ltd | Construction | 2012 |
| Retail Efficiency Limited | Professional & scientific | 1963 |
| Rethink Property Management Ltd | Real estate | 2015 |
| Reumax Ltd | Real estate | 2020 |
| Reva Well Ltd | Health & social care | 2026 |
| Review BOD Ltd | Information & communication | 2025 |
| Review Your Policies Ltd | Financial services | 2017 |
| Revis & Co Accountancy Services Limited | Professional & scientific | 2003 |
| Revive Auto Innovations (Portsmouth) Limited | Wholesale & retail | 2004 |
| Revive Property Solutions Ltd | Administrative & support | 2018 |
| REW Auto Services Limited | Wholesale & retail | 2005 |
| Rewardgrade Limited | Real estate | 1991 |
| REX Logistics Ltd | Transport & logistics | 2025 |
| Reynold's Interior Solutions Limited | Construction | 2022 |
| Reynolds Kiosk Ltd | Manufacturing | 2026 |
| Reynolds Living Limited | Real estate | 2020 |
| Reynolds Real Estate Ltd | Real estate | 2022 |
| RFK Investments Limited | Financial services | 2021 |
| RFP Holdings Limited | Real estate | 2016 |
| RGR and Webb Rendering and Plastering Ltd | Construction | 2023 |
| RGS Events Limited | Administrative & support | 2010 |
| RGS Recruitment Ltd | Administrative & support | 2019 |
| RGW Will & Estate Planning Limited | Administrative & support | 2007 |
| RH Marine Group Limited | Financial services | 2019 |
| RH22 Consulting Limited | Professional & scientific | 2024 |
| Rhadegund Limited | Professional & scientific | 2021 |