| Red 8 Investments UK Limited | Real estate | 2022 |
| Red 8 Properties Limited | Real estate | 2020 |
| Red Sea Stone Group Ltd | Construction | 2019 |
| Red Sea Stone Ltd | Construction | 2017 |
| Redbush Property Rentals Ltd | Real estate | 2021 |
| Redleaf Global Limited | Wholesale & retail | 2025 |
| Redsmoke Limited | Information & communication | 1999 |
| Redwood Properties Listings Ltd | Real estate | 2023 |
| Redwood Tree Ltd | Construction | 2018 |
| Reedesigned Limited | Wholesale & retail | 2025 |
| Refah Management Ltd | Real estate | 2023 |
| Regal Property Management Group Ltd | Real estate | 2026 |
| Regalarmoury Ltd | Wholesale & retail | 2025 |
| Regenpro Ltd | Wholesale & retail | 2021 |
| Regina Creations Ltd | Hospitality | 2025 |
| Rehab ME Ltd | Health & social care | 2019 |
| Rehman Property Limited | Real estate | 2023 |
| Reiter Engineering Limited | Wholesale & retail | 2023 |
| Rekan Wholesale Limited | Wholesale & retail | 2026 |
| Relevancepoint Limited | Professional & scientific | 2009 |
| Reliable Accounting Service Limited | Professional & scientific | 2022 |
| Reliance Contractors (UK) Limited | Construction | 2012 |
| Reliance Education Services Limited | Administrative & support | 2009 |
| Remi Construction Ltd | Construction | 2021 |
| Remote AVE Limited | Information & communication | 2025 |
| Removalex Limited | Transport & logistics | 2018 |
| Removals Expert Ashford Ltd | Transport & logistics | 2018 |
| Renewed Housing Ltd | Real estate | 2024 |
| Renlon Limited | Construction | 1976 |
| Renova Technologies Limited | Information & communication | 2024 |
| Renovate & LET Ltd | Real estate | 2021 |
| Renovations Plus Ltd | Construction | 2020 |
| Repair&Polishing Limited | Other services | 2022 |
| Repton Properties LLP | | 2023 |
| RES Spark Electrical Ltd | Construction | 2026 |
| Resa Enterprise Ltd | Hospitality | 2025 |
| Reset Forward CIC | Professional & scientific | 2026 |
| Reshard Services Ltd | Professional & scientific | 2025 |
| Resilience Car Care Limited | Wholesale & retail | 2026 |
| Rest Assured Rents Ltd. | Real estate | 2023 |
| Rest Harrow Limited | Professional & scientific | 2017 |
| Restassure Support Services Ltd | Health & social care | 2019 |
| Restaurant ''Deja VU'' Ltd | Hospitality | 2019 |
| Restore Supported Living Limited | Health & social care | 2026 |
| Restyle & Development Ltd | Construction | 2014 |
| Restyle Innovation Holdings Ltd | Construction | 2024 |
| Restyle Investments Ltd | Wholesale & retail | 2020 |
| REV UP Cloud Ltd | Information & communication | 2025 |
| Revenue Engine Labs Ltd | Professional & scientific | 2026 |
| REVISE2 Ltd | Education | 2026 |
| Revive Wandle Roots CIC | Agriculture & fishing | 2024 |
| Rey's Kitchen Ltd | Hospitality | 2025 |
| RG Group Industries Ltd | Professional & scientific | 2026 |
| RGA Skyline Developments Ltd | Real estate | 2014 |
| RGM Construction (UK) Ltd | Construction | 2010 |
| RGS IT Solutions Ltd | Information & communication | 2019 |
| Rhar Ltd | Hospitality | 2026 |
| RHE London Ltd | Other services | 2022 |
| RI Investments Ltd | Real estate | 2018 |
| Rich Homes Improvement Ltd. | Construction | 2025 |
| Richards Enterprise Limited | Wholesale & retail | 2022 |
| Richards Property Development Ltd | Manufacturing | 2025 |
| Richsprings Group Ltd | Real estate | 2025 |
| Ride Marfo and Iama Ltd | Construction | 2014 |
| Ridgeline Limited | Arts & recreation | 2015 |
| Ridgestar Holdings Limited | Real estate | 2025 |
| Ridgestar Management Limited | Construction | 2025 |
| Right Click Forensic Ltd | Information & communication | 2011 |
| Right Time Consultants Ltd | Wholesale & retail | 2018 |
| Rijo Concierge Ltd | Transport & logistics | 2026 |
| Rinwa Enterprise Ltd | Administrative & support | 2024 |
| Rise Education School Ltd | Education | 2013 |
| Rise Synergy Ltd | Real estate | 2022 |
| Riseztate Ltd | Real estate | 2026 |
| Riva Cafe Ltd | Hospitality | 2014 |
| Riva Lane Trading Ltd | Wholesale & retail | 2026 |
| Riverdale Meridian Limited | Real estate | 2025 |
| Riverside AD Limited | Energy | 2013 |
| Riverside BIO Limited | Hospitality | 2012 |
| Riverside Media Group Ltd | Information & communication | 2018 |
| Riverside Payroll & Finance Consultancy Ltd | Professional & scientific | 2022 |
| Rivertree Property Ltd | Real estate | 2019 |
| RJ Property London Ltd | Real estate | 2024 |
| Rj's Drylining Ltd | Construction | 2026 |
| RJF Function Rooms Ltd | Hospitality | 2017 |
| RJM Tech Ltd | Information & communication | 2022 |
| RJS Utilities Limited | Construction | 2017 |
| RK Construction 1 Ltd | Construction | 2020 |
| RK Motors MOT Centre Ltd | Wholesale & retail | 2015 |
| RK Retail Limited | Wholesale & retail | 2022 |
| RLN Construction Solutions Ltd | Construction | 2026 |
| RM Pestokill Limited | Other services | 2018 |
| RMK Link Ltd | Construction | 2016 |
| RML Mots Ltd | Professional & scientific | 2025 |
| RMP Plumbing and Pipework Ltd | Construction | 2019 |
| RNZ Car Rental Limited | Administrative & support | 2016 |
| Roaddux Limited | Information & communication | 2025 |
| Robboles Logistics Ltd | Administrative & support | 2024 |
| Robbyson Ltd | Wholesale & retail | 2024 |
| Robert J. Cook Limited | Financial services | 2002 |