| Rebellion Commercial Properties Ltd | Real estate | 2018 |
| Rebellion Consumer Products & Media Holdings Limited | Information & communication | 2021 |
| Rebellion Consumer Products Limited | Administrative & support | 2020 |
| Rebellion Developments Limited | Information & communication | 1992 |
| Rebellion Digital Assets Ltd | Information & communication | 2020 |
| Rebellion Entertainment Holdings Ltd | Professional & scientific | 2018 |
| Rebellion Entertainment IP Ltd | Information & communication | 2018 |
| Rebellion Entertainment Ltd | Information & communication | 2017 |
| Rebellion Factual Ltd | Information & communication | 2017 |
| Rebellion Film Ltd | Information & communication | 2019 |
| Rebellion Film Studios Ltd | Information & communication | 2019 |
| Rebellion Flame Ltd | Administrative & support | 2020 |
| Rebellion Games Holdings Ltd | Professional & scientific | 2018 |
| Rebellion Games IP Ltd | Information & communication | 1992 |
| Rebellion Group Ltd | Professional & scientific | 2018 |
| Rebellion Interactive Games Limited | Information & communication | 2008 |
| Rebellion Interactive Limited | Information & communication | 1992 |
| Rebellion Liverpool Ltd | Information & communication | 2005 |
| Rebellion Music Ltd | Information & communication | 2021 |
| Rebellion North Ltd | Information & communication | 2018 |
| Rebellion Productions Ltd | Information & communication | 2016 |
| Rebellion Properties Ltd | Real estate | 2017 |
| Rebellion Publishing Holdings Ltd | Professional & scientific | 1992 |
| Rebellion Publishing IP Ltd | Information & communication | 2008 |
| Rebellion Publishing Limited | Information & communication | 2009 |
| Rebellion Residential Properties Ltd | Real estate | 2020 |
| Rebellion Services Ltd | Administrative & support | 2018 |
| Rebellion Software Limited | Information & communication | 2003 |
| Rebellion Studio Properties Ltd | Information & communication | 2018 |
| Rebellion TV Ltd | Information & communication | 2019 |
| Rebellion Unplugged Ltd | Wholesale & retail | 2018 |
| Rebellion VFX Ltd | Information & communication | 2019 |
| Rebellion Warwick Ltd | Information & communication | 2011 |
| Recalibrate Health Limited | Health & social care | 2026 |
| Reco 3.26 Limited | Information & communication | 2016 |
| Recreation Jewels Ltd | Wholesale & retail | 2024 |
| Recruitment World Ltd | Administrative & support | 2016 |
| Rectory Farm Management Limited | Extraterritorial | 1982 |
| Recursive Safeguarding Ltd | Professional & scientific | 2025 |
| Recycles Tech Ltd | Information & communication | 2024 |
| Red 7 Holdings Ltd | Financial services | 2024 |
| Red Bench Studio Ltd | Construction | 2024 |
| Red Clay Pictures Ltd | Information & communication | 2021 |
| Red Conker Ltd | Wholesale & retail | 2025 |
| Red E MED Limited | Professional & scientific | 2002 |
| Red Fable Ltd | Construction | 2016 |
| Red Kite Partners Limited | Professional & scientific | 2005 |
| Red Kite Research Limited | Professional & scientific | 2013 |
| Red Knot Communications Ltd | Professional & scientific | 2019 |
| Red Magic Ltd | Hospitality | 2023 |
| Red Securities Limited | Extraterritorial | 2019 |
| Red Sky Ltd | Wholesale & retail | 2025 |
| Red Star Media and Consultancy Limited | Professional & scientific | 2021 |
| Red Step Roasters Limited | Manufacturing | 2025 |
| Red Thread Market Access Ltd | Professional & scientific | 2019 |
| Redbrana Ltd | Hospitality | 2023 |
| Redbrick Housing Limited | Real estate | 2015 |
| Redbridge Consulting Ltd | Administrative & support | 2012 |
| Redeemed Care Limited | Health & social care | 2012 |
| Redirect Community Limited | Information & communication | 2026 |
| Redlime Developments (Littleworth) Limited | Extraterritorial | 2011 |
| Redpony Ltd | Information & communication | 2009 |
| Redslim Limited | Professional & scientific | 2013 |
| Reduce Digital Distraction CIC | Information & communication | 2025 |
| Reducing the Risk of Domestic Abuse | Health & social care | 2007 |
| Redyard Properties Limited | Real estate | 2016 |
| Reebick Property Care Ltd | Other services | 2023 |
| Reefer Group UK Ltd | Financial services | 2025 |
| Reeves Memorial Company Limited | Other services | 1984 |
| Reevite Industrial Mouldings Limited | Manufacturing | 1982 |
| Refeyn Ltd | Professional & scientific | 2018 |
| Reflex Planning Solutions Limited | Information & communication | 2001 |
| Reflexionlondon.Com Ltd | Wholesale & retail | 2020 |
| Refuel Vending Limited | Hospitality | 2025 |
| Refugee Resource | Health & social care | 2002 |
| REG Taylor Cycles Limited | Manufacturing | 2014 |
| Regal Evercrest Holdings Ltd | Real estate | 2025 |
| Regalstay Ltd | Real estate | 2021 |
| Regent & Harbor Press Ltd | Information & communication | 2025 |
| Regent Language Training Limited | Extraterritorial | 1974 |
| Regent's Park College | Education | 2018 |
| Regent's Park College (Oxford) Limited | Hospitality | 1994 |
| Regent's Park College Incorporated Limited | Extraterritorial | 1996 |
| Reginald Henry Limited | Real estate | 2016 |
| Region to Season Ltd | Wholesale & retail | 2021 |
| Regis Maintenance Limited | Other services | 2025 |
| Regnum Books Limited | Wholesale & retail | 1984 |
| Rehman Property Management Limited | Real estate | 2021 |
| Reignwear Limited | Wholesale & retail | 2003 |
| Reimagine Life Limited | Professional & scientific | 2016 |
| Reis Connect Ltd | Wholesale & retail | 2020 |
| Rejoice Logistics Ltd | Transport & logistics | 2026 |
| Relational Intelligence Limited | Information & communication | 2026 |
| Relax Kids Limited | Education | 2004 |
| Relaxa Mobility Ltd | Manufacturing | 2019 |
| Relaxed Snail Ltd. | Education | 2021 |
| Relay Trust | Education | 2024 |
| Relayware Ltd | Information & communication | 1997 |
| Relevant Ltd | Professional & scientific | 2020 |
| Reliability Oxford Limited | Professional & scientific | 2002 |