| Roundtable Investment Ltd | Real estate | 2022 |
| Rowark Investments LLP | | 2012 |
| Rowein Investments Limited | Real estate | 2016 |
| Rowen Properties Investments Limited | Real estate | 2022 |
| Rowlands Close Management Company Limited | Households | 1987 |
| ROX Property Holding Limited | Real estate | 2021 |
| Royale Autos Limited | Wholesale & retail | 2024 |
| Royale CUT (Hairsalon) Ltd | Other services | 2023 |
| Royaume Limited | Real estate | 2025 |
| Rozebud Ltd | Information & communication | 2025 |
| Rozi PAY Limited | Financial services | 2025 |
| RP Maxx Ltd | Hospitality | 2011 |
| RP Property Holdings Limited | Real estate | 2024 |
| RPA Designs Ltd | Professional & scientific | 2014 |
| RPC Property Solutions Limited | Construction | 2017 |
| RPK Solicitors Ltd | Professional & scientific | 2021 |
| RR International Ltd | Real estate | 2025 |
| RR Properties Services Limited | Real estate | 2025 |
| RR22 Ltd | Financial services | 2025 |
| RS Motors Services Ltd | Wholesale & retail | 2024 |
| RS Special Opportunities Ltd | Financial services | 2015 |
| RSANDSB18 Ltd | Real estate | 2022 |
| RSJ Pharma Ltd. | Health & social care | 2017 |
| RSJ Promoting Limited | Wholesale & retail | 2025 |
| RSK Fabrics Limited | Wholesale & retail | 2012 |
| RSM Traders Ltd | Wholesale & retail | 2024 |
| Rsnoori Ltd | Wholesale & retail | 2022 |
| RSR Management Ltd | Professional & scientific | 2020 |
| RST Family Limited | Real estate | 2025 |
| RT Networks Limited | Information & communication | 2022 |
| Rtbc Limited | Education | 2022 |
| Rtype Limited | Construction | 2024 |
| RU Accounting Consultancy Limited | Professional & scientific | 2015 |
| Rudyfix Property Maintenance Ltd | Construction | 2023 |
| Rufel Limited | Administrative & support | 2010 |
| Ruhaura Ltd | Wholesale & retail | 2025 |
| Rujoe Limited | Professional & scientific | 2008 |
| Rukia Limited | Information & communication | 2002 |
| Rumal Limited | Professional & scientific | 2011 |
| Run Build Limited | Construction | 2018 |
| Run Buildups Ltd | Construction | 2022 |
| Runu & Co Accountancy & Taxation Services Limited | Professional & scientific | 2006 |
| Runu & Co Group Limited | Professional & scientific | 2006 |
| Runu & Co Management Consultants Limited | Real estate | 2007 |
| Rupalp Ltd | Professional & scientific | 2024 |
| Rutland Park Limited | Real estate | 2016 |
| RVB Infinity Holding Limited | Administrative & support | 2025 |
| Rwanda Business UK Ltd | Professional & scientific | 2023 |
| RYA Boutique Ltd | Wholesale & retail | 2025 |
| Ryall Close Ltd | Real estate | 2023 |
| Ryan Builders ALB Ltd | Construction | 2018 |
| Ryan R Ltd | Construction | 2023 |
| Ryandis UK Ltd | Information & communication | 2015 |
| Rybm Estates Ltd | Real estate | 2024 |
| Rybrm 1 Ltd | Construction | 2023 |
| Rydian Tech Ltd | Information & communication | 2024 |
| Ryuzeven Ltd | Wholesale & retail | 2024 |
| RZL Services Ltd | Construction | 2022 |
| RZP Enterprise Limited | Hospitality | 2023 |
| S & G Consulting Limited | Professional & scientific | 2005 |
| S & K Investments (London) Limited | Construction | 2022 |
| S & M Salon Limited | Other services | 2019 |
| S & O Care Services Limited | Health & social care | 2023 |
| S & P Properties Limited | Real estate | 2016 |
| S & S in Hair Ltd | Other services | 2023 |
| S and M Ltd | Wholesale & retail | 2024 |
| S Circle Limited | Real estate | 2018 |
| S Franks Services Limited | Health & social care | 2014 |
| S H Mobile Car Services Ltd | Wholesale & retail | 2020 |
| S J K Enterprises Limited | Construction | 2020 |
| S Jones Limited | Administrative & support | 2008 |
| S M Jackman Property Management Ltd | Households | 2016 |
| S M&J Ltd | Construction | 2021 |
| S R Food City Ltd | Wholesale & retail | 2019 |
| S V Rail Limited | Construction | 2016 |
| S&A Aesthetics Ltd | Other services | 2025 |
| S&B Real Estate Group Ltd | Real estate | 2024 |
| S&C Engineering Services Ltd | Professional & scientific | 2022 |
| S&H (Cricklewood) Ltd | Wholesale & retail | 2023 |
| S&Kb Estates Limited | Real estate | 2021 |
| S&M Real Estate Investments Ltd | Real estate | 2022 |
| S&S Edgware Motors Ltd | Wholesale & retail | 2025 |
| S&S Repair Centre Limited | Administrative & support | 2016 |
| S&T Developers Ltd | Real estate | 2014 |
| S-Technology Group Ltd | Financial services | 2025 |
| S-Tib Construction Limited | Construction | 2024 |
| S. & R. Management Limited | Real estate | 1934 |
| S. Scott GAS Team Ltd | Construction | 2021 |
| S.K. Accounting & Tax Services Limited | Professional & scientific | 2019 |
| S.K.A. Property Investment & Management Ltd | Real estate | 2019 |
| S.N.S Studio Ltd | Professional & scientific | 2026 |
| S.T. Building Ltd | Construction | 2009 |
| S2D Ltd | Construction | 2019 |
| S2ONE JIU Jitsu Acamdey Ltd | Education | 2025 |
| S455 Loan Limited | Administrative & support | 2023 |
| S8 Engineering Limited | Professional & scientific | 2021 |
| S86 Ltd | Transport & logistics | 2026 |
| SA Beauty Burnt Oak Ltd | Other services | 2021 |
| SA Beauty Crouch END Ltd | Other services | 2021 |
| SA Beauty Gloucester Ltd | Other services | 2021 |