| Ray's Body Shop & Garage Ltd | Wholesale & retail | 2019 |
| Ray's Bodyworks Ltd | Wholesale & retail | 2019 |
| Ray's Carpentry Ltd | Construction | 2017 |
| Raya Fast Delivery Ltd | Transport & logistics | 2017 |
| Raza Business Support Services Ltd | Administrative & support | 2026 |
| Raza Khan Brothers UK Limited | Real estate | 2020 |
| Razvan & Nicole Transport Ltd | Administrative & support | 2017 |
| RBC Accountants Ltd | Professional & scientific | 2014 |
| RBC Heating Ltd | Construction | 2014 |
| Rbcox Limited | Other services | 2019 |
| RBF Solutions Ltd Limited | Transport & logistics | 2015 |
| RBT Investments Ltd | Real estate | 2020 |
| RBT Logistics Ltd | Transport & logistics | 2019 |
| RBT Transport Limited | Transport & logistics | 2025 |
| RCL Group 1 Ltd | Construction | 2026 |
| RDC Site Services Ltd | Construction | 2016 |
| RDG UK Group Ltd | Construction | 2025 |
| RDK Electromechanical and HGV Services Limited | Transport & logistics | 2016 |
| Read Veneers Limited | Manufacturing | 2006 |
| Ready SET Mortgage Ltd | Financial services | 2024 |
| Real Estate Access Ltd | Real estate | 2024 |
| Real Life Financial Solutions Limited | Financial services | 1989 |
| Reallinks Properties Limited | Real estate | 2026 |
| Realtime Films Ltd | Real estate | 2010 |
| Rebecca Care Ltd | Health & social care | 2014 |
| Reco Civils Ltd | Administrative & support | 2021 |
| Record Elevators Ltd | Manufacturing | 2021 |
| Recruitelite Ltd | Hospitality | 2025 |
| Recursive Dimensions Ltd | Information & communication | 2025 |
| Recy Tech AI Ltd | Manufacturing | 2026 |
| Red Lion Garage Orsett Limited | Wholesale & retail | 2013 |
| Red Lion Recovery Ltd | Wholesale & retail | 2016 |
| Red Transport Solutions Ltd | Transport & logistics | 2021 |
| Redbridge Schools Support Service Limited | Administrative & support | 2009 |
| Redemption Comprehensive Services Ltd | Health & social care | 2017 |
| Rediplans Ltd | Professional & scientific | 2025 |
| Reditus Capital Limited | Financial services | 2021 |
| Redvers Love Ltd | Construction | 2026 |
| Reeb Enterprises (Trading AS Essex Country Sports) Limited | Wholesale & retail | 2022 |
| Reef Logistics Ltd | Transport & logistics | 2024 |
| Rees Property Management Limited | Real estate | 2017 |
| Reese Moore Contract Services Ltd | Other services | 2016 |
| Reeth Property Services Ltd | Real estate | 2020 |
| Refill Cabin CIC | Hospitality | 2025 |
| Reflective Properties Ltd | Hospitality | 2019 |
| Refurb Essex Bathrooms Limited | Construction | 2024 |
| Regal Sapphire Ltd | Information & communication | 2018 |
| Regen Capital Limited | Professional & scientific | 2021 |
| Regen Coulsdon Limited | Professional & scientific | 2024 |
| Regent Estates Management + Sales Limited | Real estate | 2003 |
| Reggae Hits Bingo Limited | Arts & recreation | 2025 |
| Regional Waste Recycling (Commercial) Limited | Water & waste | 2007 |
| Registry of Master Blind & Curtain Makers Limited | Manufacturing | 1989 |
| Rehoboth Care Support Services Limited | Health & social care | 2022 |
| Rekay Ltd | Real estate | 2026 |
| Relay Logistics Ltd | Transport & logistics | 2021 |
| Reliable Effluent Services Limited | Water & waste | 2018 |
| Reliable Transportation Ltd | Transport & logistics | 2021 |
| Reliance Motors Ltd | Wholesale & retail | 2017 |
| Reliance Transport Services Ltd | Transport & logistics | 2022 |
| Reliance UK Trading Ltd | Financial services | 2020 |
| Reliant Home Group Ltd | Administrative & support | 2025 |
| Reloaded Energy Services Limited | Construction | 2017 |
| Rema Care Ltd | Health & social care | 2019 |
| Remcu Ltd | Construction | 2014 |
| Remi Zack Ltd | Information & communication | 2010 |
| Remiah Limited | Real estate | 2025 |
| Remo Healthcare Group Ltd | Health & social care | 2024 |
| Removals Zone Ltd | Transport & logistics | 2012 |
| Renasco Ltd | Information & communication | 2025 |
| Rendzina Technologies Ltd | Information & communication | 2024 |
| Renewables Services Ltd | Construction | 2022 |
| Renion Ltd | Construction | 2025 |
| Renoir Skin and Beauty Clinic Ltd | Other services | 2022 |
| Renoove London Limited | Construction | 2020 |
| Rental Shield Limited | Real estate | 2026 |
| Rentcare Properties Ltd | Real estate | 2021 |
| Rentigo International Ltd | Real estate | 2023 |
| Rentigo Ltd | Real estate | 2019 |
| Repairable Surfaces Ltd | Other services | 2022 |
| Requinte Brazil Import & Export Limited | Hospitality | 2017 |
| Reshma Manavalan Consultancy Ltd | Information & communication | 2022 |
| Respecttools Ltd | Construction | 2025 |
| Restoration Consulting Limited | Health & social care | 2026 |
| Restoration Enterprises Limited | Professional & scientific | 2026 |
| Results Fitness and Health Limited | Arts & recreation | 2011 |
| Results Wellness Lifestyle Limited | Arts & recreation | 2013 |
| REV ROY Grayson Ltd | Water & waste | 2024 |
| Reverse Vending Maintenance Ltd. | Extraterritorial | 2011 |
| Reverse Vending Systems Limited | Professional & scientific | 2007 |
| Revolvart Productions Ltd | Information & communication | 2025 |
| Reynolds Acquisitions Ltd | Real estate | 2023 |
| RF Capital Solutions Ltd | Information & communication | 2020 |
| Rf&C Ltd | Construction | 2022 |
| RG Bridge Academy Limited | Professional & scientific | 2022 |
| RGR Accounting Services Limited | Professional & scientific | 2016 |
| RGS Holdings Limited | Professional & scientific | 2009 |
| RGS Rail Limited | Professional & scientific | 2015 |
| RH Electrical Services (South East) Ltd | Construction | 2025 |
| Rhemte Ltd | Real estate | 2021 |