| Reuzeit Ltd | Wholesale & retail | 2020 |
| Revelation Audio UK Ltd | Manufacturing | 2017 |
| Reverb Foundry Ltd | Administrative & support | 2017 |
| Revival Festivals Limited | Arts & recreation | 2025 |
| Revive Specialised Cleaning Ltd | Administrative & support | 2012 |
| REVORA400 Ltd | Financial services | 2014 |
| Rewild Health Ltd | Education | 2020 |
| REX Builders Ltd | Construction | 2024 |
| REX Media Group Limited | Professional & scientific | 2019 |
| Rexco Ltd | Construction | 2024 |
| Reynolds Bespoke Carpentry Ltd | Real estate | 2018 |
| Reynolds Property Lettings Limited | Real estate | 2018 |
| Rflf Holdings Limited | Financial services | 2025 |
| Rggt Management Limited | Administrative & support | 2015 |
| RGM Solutions Limited | Administrative & support | 2025 |
| Rhiden Ltd | Other services | 2019 |
| Rhino's Plant Hire Limited | Administrative & support | 2005 |
| Ribera Sapphire Ltd | Administrative & support | 2015 |
| Rich Ryan Studio Limited | Professional & scientific | 2020 |
| Richard Arthur Limited | Health & social care | 2003 |
| Richard Attfield Bespoke Upholstery Ltd | Other services | 2022 |
| Richard Attfield Limited | Other services | 2010 |
| Richard Bevin Business Account Ltd | Real estate | 2022 |
| Richard Cowne Limited | Professional & scientific | 1972 |
| Richard Partridge Ltd | Administrative & support | 2024 |
| Richards the Lionheart Ltd | Financial services | 2022 |
| Richmond House (Southend) Limited | Real estate | 2003 |
| Richmond Paraplanning Ltd | Administrative & support | 2025 |
| Ricos Scaffolding Limited | Construction | 2025 |
| Ride OR DIE Limited | Information & communication | 2026 |
| Ridgley Property Management Limited | Construction | 2018 |
| Right & Left Creative Limited | Information & communication | 2022 |
| Right Direction Vintage Ltd | Wholesale & retail | 2025 |
| Righttech Consulting Ltd | Information & communication | 2015 |
| Riley Property Management Ltd | Real estate | 2022 |
| Riskinsight Consulting Limited | Professional & scientific | 2018 |
| Ritchie and Associates Ltd | Professional & scientific | 2024 |
| Rivenge Limited | Professional & scientific | 2020 |
| Rivenhall Construction Limited | Construction | 2024 |
| Rivenhall Property Investment Limited | Real estate | 2021 |
| River Rain Thai Spa Ltd | Other services | 2024 |
| Riverside Hockley Properties Limited | Real estate | 2016 |
| RJ Contracting Services Ltd | Construction | 2022 |
| RJ VU Ltd | Education | 2012 |
| RJA Tools Ltd | Wholesale & retail | 2011 |
| RJD Advisory Limited | Professional & scientific | 2025 |
| RJH & Sons Building & Landscaping Limited | Construction | 2024 |
| RJH Roofing & Building Ltd | Construction | 2025 |
| RJI Group Limited | Construction | 2013 |
| RJM Technology Ltd | Information & communication | 2019 |
| RJT Building Services Limited | Construction | 2026 |
| RJT Property Holdings Limited | Real estate | 2024 |
| RK Corporate Ltd | Other services | 2024 |
| RLS Consulting Limited | Professional & scientific | 2020 |
| RM Construction & Developments Ltd | Construction | 2007 |
| RM GAS Installations Limited | Health & social care | 2012 |
| RM GAS Installs LLP | | 2025 |
| RM Golf Limited | Arts & recreation | 2018 |
| RMB Property Services Essex Ltd | Construction | 2026 |
| RMC Electrical Services Ltd | Construction | 2014 |
| RMR Brands Ltd | Professional & scientific | 2015 |
| RMR Homes Limited | Construction | 2011 |
| RNR Sprinklers Limited | Public administration | 2023 |
| Roach Properties Ltd | Real estate | 2019 |
| Road Safety Support Limited | Administrative & support | 2007 |
| Roadmap Recruitment Ltd | Administrative & support | 2017 |
| Roadway Transport Ltd | Transport & logistics | 2013 |
| Roaring Success Ltd | Professional & scientific | 2018 |
| ROB MAD Films Ltd | Administrative & support | 2016 |
| Robbie Robinson Ltd | Construction | 2024 |
| Robert James Products Ltd | Wholesale & retail | 2023 |
| Robert Jane Surveying Services Limited | Professional & scientific | 2008 |
| Robert Kent Design Limited | Professional & scientific | 2016 |
| Robert Rose Properties Ltd | Construction | 2026 |
| Robert Stevens & Sons Fabrication Limited | Manufacturing | 2012 |
| Robert Stevens & Sons Limited | Manufacturing | 1957 |
| Robert Wood Media Ltd | Professional & scientific | 2020 |
| Roberts Commercial Cleaning Ltd | Administrative & support | 2023 |
| Roberts Garment Care Limited | Other services | 2025 |
| Robot Repairs Limited | Manufacturing | 2017 |
| Robyn's Place Limited | Hospitality | 2023 |
| ROC Professional Services Ltd | Professional & scientific | 2025 |
| Rochford Property Development Ltd | Administrative & support | 2016 |
| Rock Axis Limited | Information & communication | 2026 |
| Rock for Heroes Ltd | Arts & recreation | 2025 |
| Rock, Paper, Sales Limited | Professional & scientific | 2023 |
| Rocklite Ltd | Wholesale & retail | 2014 |
| Rockwells SWS Limited | Construction | 2018 |
| Rocoma Investments Ltd | Real estate | 2016 |
| Rofe Medical Limited | Health & social care | 2024 |
| Roger King Limited | Information & communication | 2018 |
| Rogers Properties Ltd | Real estate | 2016 |
| ROK Electrical Limited | Construction | 2017 |
| ROK Invest Limited | Real estate | 2020 |
| Roll Boys Ltd | Hospitality | 2024 |
| Rollin' ADS Limited | Professional & scientific | 2014 |
| Rolling Door Concepts Limited | Construction | 2017 |
| Romford Juniors IHC Limited | Arts & recreation | 2024 |
| Romi Bowen Coaching Ltd | Professional & scientific | 2021 |
| Ronalda Properties Limited | Real estate | 2023 |