| Rehoboth Group Ltd | Real estate | 2021 |
| Rehoboth Health and Home Care Limited | Health & social care | 2013 |
| Rehoboth Land Properties Limited | Real estate | 2022 |
| Rehoboth Social Care Support Services Ltd | Transport & logistics | 2024 |
| REHOBOTH24 Healthcare Solutions Ltd | Health & social care | 2015 |
| Rehovot Services Ltd | Other services | 2018 |
| Reid and Co Developments Ltd | Construction | 2016 |
| Reidspeed Properties UK Ltd | Households | 2019 |
| Reigate Silver Ltd | Wholesale & retail | 2025 |
| Reign Commercial Limited | Real estate | 2015 |
| Reign Group Holdings Ltd | Professional & scientific | 2016 |
| Reign Real Estate Limited | Real estate | 2011 |
| Reign Supreme Care Services Ltd | Health & social care | 2015 |
| Reignite Marketing Limited | Information & communication | 2019 |
| Reilly’S Site Recruitment Ltd | Administrative & support | 2025 |
| Reimaginaire Limited | Professional & scientific | 2014 |
| Rein Fort Ltd | Wholesale & retail | 2023 |
| Reina Group Limited | Public administration | 2023 |
| Reinholds Bunde Consulting Ltd | Information & communication | 2018 |
| Reisen Mundo Ltd | Administrative & support | 2024 |
| Reiss and Amrina Co Ltd | Health & social care | 2022 |
| REJUVAN8 Film Production Ltd | Information & communication | 2021 |
| Reka Tech Resale Ltd | Wholesale & retail | 2025 |
| Relational Urbanism Limited | Professional & scientific | 2009 |
| Relax & Lounge Ltd | Real estate | 2024 |
| Releasehr Ltd | Administrative & support | 2025 |
| Reliable Industrial Supplies Ltd | Wholesale & retail | 2005 |
| Reliance Business Services Limited | Administrative & support | 2023 |
| Reliance Estates Ltd | Real estate | 2012 |
| Reliance General Trading Ltd | Other services | 2021 |
| Reliance IT Services Ltd | Information & communication | 2019 |
| Reliance Leathers UK Ltd | Wholesale & retail | 2025 |
| Reliance Maintenance Limited | Real estate | 2014 |
| Reliance Properties Limited | Real estate | 2011 |
| Reliance Property Group Ltd | Real estate | 2017 |
| Reliance Staffing Limited | Administrative & support | 2024 |
| Relianceretailuk Ltd | Wholesale & retail | 2024 |
| Reliant Finance Limited | Financial services | 2012 |
| Reload Foods Limited | Hospitality | 2023 |
| Remagate Limited | Information & communication | 1978 |
| REMAINHUMBLE26 Ltd | Wholesale & retail | 2021 |
| Rematerials Ltd | Professional & scientific | 2015 |
| Remedial Health Clinic Ltd | Health & social care | 2025 |
| Remedy One Ltd | Real estate | 2019 |
| Rememdium Limited | Construction | 2009 |
| Remie Margot Ltd | Wholesale & retail | 2019 |
| Remmysumbik Ltd | Construction | 2024 |
| Remoam Ltd | Health & social care | 2024 |
| Remote Patient Services Limited | Health & social care | 2024 |
| Remote Tech Support Ltd | Other services | 2026 |
| Remote Triangle Holdings Limited | Financial services | 2020 |
| Remotefobcentre Limited | Wholesale & retail | 2012 |
| Removals Express Ltd | Transport & logistics | 2008 |
| Rems Transport Services Limited | Transport & logistics | 2022 |
| Remus Logistics Ltd | Transport & logistics | 2026 |
| REMUS96 Limited | Construction | 2026 |
| Remy-D Ltd | Information & communication | 2025 |
| REN Transport Ltd | Transport & logistics | 2023 |
| REN Yoga Ltd | Education | 2020 |
| Renal Concepts Limited | Professional & scientific | 2010 |
| Renal Supplies Limited | Transport & logistics | 2010 |
| Rend&Co Limited | Professional & scientific | 2023 |
| Rendah Films Ltd | Information & communication | 2022 |
| Rendertec Leicester Limited | Construction | 2022 |
| Rendham Elite Ltd | Transport & logistics | 2015 |
| Renergy Solutions Ltd | Construction | 2012 |
| Renew Property Holdings Ltd | Real estate | 2022 |
| Renew Writing Ltd | Professional & scientific | 2025 |
| Renewable Energy International Ltd | Construction | 2017 |
| Renewable Union Ltd | Manufacturing | 2014 |
| Renewabubble Ltd | Construction | 2023 |
| Renewagen Ltd | Construction | 2024 |
| Renewals Direct Limited | Administrative & support | 2019 |
| Renewed Computers Limited | Wholesale & retail | 2020 |
| Renhold Commerce Ltd | Transport & logistics | 2015 |
| Renocon Limited | Construction | 2020 |
| Renova K Limited | Wholesale & retail | 2023 |
| Renovar Solar Ltd | Construction | 2025 |
| Renovation Rewards Ltd | Construction | 2018 |
| Renovo (SE) Ltd | Construction | 2020 |
| Renovo Talent Ltd | Administrative & support | 2025 |
| Renovyt Limited | Other services | 2020 |
| Rent a Property (Leicester) Ltd | Real estate | 2017 |
| Rent-A-Delivery Ltd | Administrative & support | 2024 |
| Rentable Homes Ltd | Real estate | 2020 |
| Rental & Recruiting Ltd | Real estate | 2021 |
| Rental UK Holdings Limited | Construction | 2007 |
| Rentall Plant Services Ltd | Wholesale & retail | 2020 |
| Rentals Leicester Ltd | Hospitality | 2025 |
| Rented Property Limited | Professional & scientific | 2013 |
| Renterior Limited | Construction | 2023 |
| Rentix Limited | Information & communication | 2025 |
| Rentnote Ltd | Information & communication | 2009 |
| René Cosmetic Limited | Wholesale & retail | 2024 |
| REO Motors Limited | Wholesale & retail | 2002 |
| Repair My Console Ltd | Wholesale & retail | 2011 |
| Repair Your Home Limited | Construction | 2026 |
| Repairs and Your Safety Ltd | Manufacturing | 2024 |
| Repark Ltd | Wholesale & retail | 2014 |
| Repeat Management Ltd | Real estate | 2022 |