| Refinery Works LLP | | 2020 |
| Reformfit Ltd | Other services | 2022 |
| Refuel Service Department Limited | Health & social care | 2025 |
| Refurb & Development Ltd | Construction | 2006 |
| Regal Sterling Blinds Ltd | Wholesale & retail | 2022 |
| Regionwood Ltd | Construction | 2018 |
| Reid Carpentry and Construction Limited | Construction | 2013 |
| Reitel Enterprises Ltd | Administrative & support | 2015 |
| Reliablit Limited | Information & communication | 2024 |
| Remashan Limited | Financial services | 2017 |
| Renovo Capital Limited | Construction | 2023 |
| Renownedrecruiters Ltd | Information & communication | 2026 |
| Researchable Ltd | Professional & scientific | 2016 |
| Reservoir Cats Limited | Professional & scientific | 2015 |
| Resource Furniture Services Limited | Administrative & support | 2002 |
| Rethink Partners Ltd | Professional & scientific | 2018 |
| Revel Experiences Limited | Hospitality | 2025 |
| Revolve English and Maths Limited | Education | 2015 |
| RFS Sustain Ltd | Administrative & support | 2025 |
| RFS Workspace (North) Ltd | Administrative & support | 2025 |
| RFS Workspace Holdings Ltd | Administrative & support | 2025 |
| RFS Workspace Ltd | Extraterritorial | 2004 |
| RG Ltd | Extraterritorial | 2009 |
| RGL Capital LLP | | 2009 |
| RGL Corporate Partner Ltd | Administrative & support | 2015 |
| Rgsd Consulting Limited | Information & communication | 2017 |
| RH Europa Ltd | Administrative & support | 2019 |
| RH PMC Ltd | Extraterritorial | 2012 |
| Rhrf Ltd | Professional & scientific | 2017 |
| Riad Property Holdings Limited | Real estate | 2026 |
| Ribogenyx Ltd | Professional & scientific | 2025 |
| Richards Industries Ltd | Arts & recreation | 2016 |
| Richter-Friis Ltd | Professional & scientific | 2015 |
| Rickling Candle Company Ltd | Wholesale & retail | 2021 |
| Rifle Design & Communications Ltd | Professional & scientific | 2012 |
| Rikshaus Limited | Wholesale & retail | 2025 |
| Riley's of Saffron Walden Limited | Wholesale & retail | 1993 |
| Ring O Bells PV Ltd | Energy | 2014 |
| Risk IT Advisory Limited | Information & communication | 2025 |
| Riverside Residential Property Limited | Real estate | 2020 |
| RJC Dining and Events Ltd | Hospitality | 2024 |
| RJM & Co Investments | Financial services | 2020 |
| RJW IT Consulting Limited | Information & communication | 2009 |
| RK Residential Lettings Ltd | Real estate | 2024 |
| RLM VET Limited | Financial services | 2022 |
| RM Hatfield Limited | Construction | 2024 |
| RM-99 Investments Ltd | Financial services | 2022 |
| RM7 Solutions Limited | Construction | 2016 |
| RMB Learning Limited | Professional & scientific | 2007 |
| Rndo Ltd | Professional & scientific | 2019 |
| ROB Grant Building Consultancy Ltd | Professional & scientific | 2014 |
| Robin Grayson Limited | Construction | 2020 |
| Robin GUY Investments Ltd | Real estate | 2021 |
| Robin Kermode Limited | Arts & recreation | 2013 |
| Robin Stevens Consulting Ltd | Professional & scientific | 2012 |
| Robyn Hood Intelligence & Security Consulting Ltd | Administrative & support | 2020 |
| Rochester Court (Flat Management) Limited | Households | 1987 |
| Rock and Roll Baby Limited | Health & social care | 2022 |
| Rockmount Construction Ltd | Construction | 2024 |
| Rockmount Group Holdings Limited | Financial services | 2026 |
| Rockmount Group Limited | Construction | 2024 |
| Rockmount Structures Limited | Manufacturing | 2024 |
| Rodney J Rigby Limited | Manufacturing | 2003 |
| Roko Noko Limited | Real estate | 2022 |
| Rolling Dogs Events Limited | Hospitality | 2014 |
| Roman Cruz Properties Ltd | Real estate | 2023 |
| Ronell Place Management Company Limited | Extraterritorial | 2006 |
| Roof Design Services Ltd | Construction | 2021 |
| Rope Access 24 Seven Ltd | Extraterritorial | 2023 |
| Rope Creative Limited | Professional & scientific | 2021 |
| Rosa Harradine Limited | Wholesale & retail | 2025 |
| Roseview Consultancy Ltd | Professional & scientific | 2024 |
| Rosida Holdings Ltd | Financial services | 2025 |
| Roskev Property Ltd | Real estate | 2019 |
| Ross Murphy Limited | Construction | 2016 |
| Rossbridge Limited | Information & communication | 2025 |
| Rossetto Solutions Ltd | Wholesale & retail | 2019 |
| Rotherfield Consultants Ltd | Professional & scientific | 2024 |
| Rotherfield Developments Limited | Construction | 2024 |
| Rotweiss Ltd | Wholesale & retail | 2019 |
| Round Brick Ltd | Construction | 2011 |
| Rowley Hill Farm Limited | Real estate | 2024 |
| Rowley Hill Investments Limited | Real estate | 1987 |
| RT & CG Limited | Real estate | 2011 |
| RT Ltd | Extraterritorial | 2009 |
| RTR Contractors Ltd | Other services | 2025 |
| Rugman Productions Limited | Arts & recreation | 2019 |
| RUI & Saadia Ltd | Wholesale & retail | 2025 |
| Running Digital Ltd | Information & communication | 2025 |
| Rural Professionals Limited | Professional & scientific | 2020 |
| Rusack Search & Selection Limited | Administrative & support | 2000 |
| Rushton Communications Consulting Ltd | Information & communication | 2017 |
| Russell Culpan Ltd | Financial services | 2020 |
| Rustic Holdings Limited | Real estate | 2026 |
| Rustic Sorcery Limited | Financial services | 2023 |
| Rutterdesign Ltd | Professional & scientific | 2020 |
| Ryker Limited | Manufacturing | 2019 |
| Ryptex Limited | Information & communication | 2021 |
| Ryskk Ltd | Professional & scientific | 2019 |
| RZB Ltd | Professional & scientific | 2024 |