| Riverside Capital (Andover) LP | | 2015 |
| Riverside Capital (KL) LP | | 2015 |
| Riverside Capital (Regent Street, Leeds) LP | | 2016 |
| Riverside Capital (Stirling) LP | | 2015 |
| Riverside Capital (Travelodge Portfolio 1) Holdco GP Limited | Real estate | 2015 |
| Riverside Capital (Travelodge Portfolio 1) KL GP Limited | Real estate | 2015 |
| Riverside Capital (Travelodge Portfolio 1) KL GP Nominee Limited | Real estate | 2015 |
| Riverside Capital (Travelodge Portfolio 1) LP | | 2015 |
| Riverside Capital (Travelodge Portfolio 1) Propco GP Limited | Real estate | 2015 |
| Riverside Capital (Travelodge Portfolio 1) Propco GP Nominee Limited | Real estate | 2015 |
| Riverside Capital (Weston-Super-Mare) LP | | 2015 |
| Riverside Capital Carried Interest Limited | Real estate | 2015 |
| Riverside Capital Fund Managers Limited | Financial services | 2015 |
| Riverside Capital Group Limited | Administrative & support | 2010 |
| Riverside Capital Investments Limited | Extraterritorial | 2010 |
| Riverside MK Ltd | Real estate | 2025 |
| Rivia Property Management Ltd | Construction | 2018 |
| RIX Restoration Services Limited | | 1978 |
| RIX Road Limited | Real estate | 2025 |
| Rixon Properties Limited | Real estate | 1998 |
| Rixon Trading Limited | Real estate | 1990 |
| Riz-O Ltd | Information & communication | 2023 |
| Rizzoli International Publications UK Limited | Information & communication | 2017 |
| Rizzy in Vogue Ltd | Wholesale & retail | 2024 |
| RJ & D Ltd | Real estate | 2022 |
| RJ Airsoft Ltd | Wholesale & retail | 2023 |
| RJ Barbers Limited | Other services | 2017 |
| RJ Bates Construction Ltd | Construction | 2022 |
| RJ Francis Ltd | Arts & recreation | 2015 |
| RJ Mechanics Ltd | Wholesale & retail | 2018 |
| RJ Singh Trading Ltd | Hospitality | 2024 |
| RJ Trade UK Ltd | Construction | 2022 |
| RJA Infosec Consultancy Ltd | Administrative & support | 2019 |
| RJC Fleet Servicing Limited | Wholesale & retail | 2025 |
| RJC Health UK Limited | Wholesale & retail | 2022 |
| RJC Holdings Limited | Financial services | 1986 |
| RJC LOW Loaders Limited | Transport & logistics | 2000 |
| RJH Accounting Services Limited | Professional & scientific | 2010 |
| RJS Carpentry. Ltd | Construction | 2024 |
| RJS Land & Properties Ltd | Real estate | 2019 |
| RJY Investments Limited | Real estate | 2017 |
| RJY Limited | Information & communication | 2005 |
| RK Education Services Limited | Education | 2023 |
| RK Homes Investments Limited | Real estate | 2024 |
| RK Tiling Ltd | Construction | 2017 |
| RKB Consulting Ltd | Information & communication | 2026 |
| Rkbrothers Ltd | Wholesale & retail | 2023 |
| RL Fire Safety and Protection Limited | Manufacturing | 2022 |
| RLC Coatings Limited | Construction | 2026 |
| RLD Consult Ltd | Education | 2024 |
| RLF Talent Partners Limited | Professional & scientific | 2022 |
| RLP Traffic Ltd | Construction | 2023 |
| Rlvncy Ltd | Information & communication | 2025 |
| RM Urology Ltd | Health & social care | 2025 |
| RM Valets Ltd | Wholesale & retail | 2026 |
| Rm-Tek Limited | Information & communication | 2019 |
| Rmad Limited | Arts & recreation | 2018 |
| Rmap Technologies Limited | Information & communication | 2018 |
| Rmdz Limited | Professional & scientific | 2015 |
| RMG Haulage Ltd | Transport & logistics | 2018 |
| RMG Homes Ltd | Real estate | 2019 |
| RML Medicolegal Ltd | Professional & scientific | 2025 |
| RMO Land Ltd | Real estate | 2024 |
| RMP Manufacturing Limited | Manufacturing | 2023 |
| Rmrd Ltd | Real estate | 2020 |
| Rmrg Ltd | Wholesale & retail | 2013 |
| RMS Painting and Decorating Ltd | Construction | 2018 |
| RMS Printing Ltd | Manufacturing | 2024 |
| RN People Ltd | Construction | 2021 |
| RN Quality Limited | Professional & scientific | 2010 |
| RNB Nation Limited | Arts & recreation | 2026 |
| RND Property Investments Ltd | Construction | 2021 |
| Rnfh Limited | Real estate | 2019 |
| RNK Engineering Ltd | Administrative & support | 2024 |
| Rnkbars Limited | Hospitality | 2025 |
| RNR Investment Properties Ltd | Real estate | 2024 |
| ROA2009 Ltd | Transport & logistics | 2018 |
| Roads College Limited | Education | 2022 |
| Roadtrans Ltd | Transport & logistics | 2025 |
| Roar Illustration Ltd | Other services | 2017 |
| Roar Talent Creatives Ltd | Other services | 2018 |
| Roarsome Management Limited | Wholesale & retail | 2021 |
| Roasta Coffee Limited | Manufacturing | 2023 |
| ROB Brown Medical Cover Limited | Health & social care | 2021 |
| ROB Cottingham Ltd | Professional & scientific | 2011 |
| ROB Critchley Mortgage Solutions Ltd | Professional & scientific | 2018 |
| ROB Lane Driving School Ltd | Education | 2024 |
| Robcap Ltd | Construction | 2024 |
| Robert Berry Accountants Limited | Professional & scientific | 2002 |
| Robert Berry Taxation Limited | Administrative & support | 2010 |
| Robert Fiehn Limited | Professional & scientific | 2016 |
| Robert Harrison Associates Limited | Professional & scientific | 2005 |
| Robert Kerr Agriculture Limited | Wholesale & retail | 2003 |
| Robert Rooney Limited | Wholesale & retail | 2003 |
| Robert Wiles Residential Ltd | Real estate | 2022 |
| Robin Hood (Luton) Management Company Limited | Professional & scientific | 2015 |
| Robin Mortgage Design Limited | Financial services | 2020 |
| Robin Partnership Limited | Financial services | 2020 |
| Robins FLY Ltd | Information & communication | 2023 |
| Robinson & Bowens Developments Limited | Construction | 2026 |