| RAV. Locpharm Limited | Other services | 2000 |
| Raxsan Limited | Professional & scientific | 2007 |
| RAY Knight Casting Limited | Information & communication | 1990 |
| RAY Lowe Limited | Professional & scientific | 2001 |
| Raynton Properties Limited | Households | 1995 |
| Rayon Realty Limited | Real estate | 2017 |
| RAZ O Niaz Limited | Real estate | 2020 |
| Raziel Consulting Limited | Information & communication | 2015 |
| Razunf Ltd | Wholesale & retail | 2020 |
| RB & M Associates Limited | Financial services | 1971 |
| Rbpm Ltd | Wholesale & retail | 2012 |
| Rccg Kingdom Life Chapel Property Limited | Real estate | 2019 |
| Rcfm Limited | Professional & scientific | 1999 |
| Re-Smile Limited | Health & social care | 2003 |
| Reach Active Limited | Construction | 2003 |
| Reactive Estates Limited | Real estate | 2001 |
| Real Estate Acquisitions Limited | Real estate | 2007 |
| Realfix Footprint CIC | Professional & scientific | 2023 |
| Realhr Consulting Ltd | Professional & scientific | 2003 |
| Realtek Sales Ltd | Other services | 2021 |
| Reasons 2B Cheerful Limited | Extraterritorial | 2003 |
| Rebel Data Limited | Information & communication | 2007 |
| Recruitment Partners Limited | Administrative & support | 2000 |
| Rectory Grove Limited | Households | 1996 |
| Red and Red Ltd | Professional & scientific | 2009 |
| Red Rhino Cars Ltd | Wholesale & retail | 2018 |
| Red Software Solutions Limited | Information & communication | 2006 |
| Red-Ochre Productions Limited | Information & communication | 2002 |
| Redator Limited | Manufacturing | 2006 |
| Redchurch Street Properties Limited | Real estate | 1964 |
| Reddiford School Trustee | Education | 1995 |
| Redeye Petroleum Retailers Limited | Transport & logistics | 1998 |
| Redfern & Partners Limited | | 1963 |
| Redvers Properties Limited | Real estate | 2007 |
| Redwood Infotech Limited | Information & communication | 2005 |
| Regal Asset Managers Limited | Real estate | 1997 |
| Regal International College Ltd | Education | 2000 |
| Regal Management Limited | Professional & scientific | 2002 |
| Regency Court Freehold Limited | Households | 1997 |
| Regency Investments Limited | Health & social care | 1988 |
| Regulator-E Associates Limited | Administrative & support | 2001 |
| Reid Business Machines Limited | Wholesale & retail | 2003 |
| Reignscare Ltd | Health & social care | 2022 |
| Relaxfare Limited | Professional & scientific | 1988 |
| Reliable Accountants Limited | Professional & scientific | 1997 |
| Reliance Finance and Property Co. Ltd | Real estate | 2017 |
| Reliance Property Consultants Limited | Other services | 2006 |
| Reliance Worldwide Corporation (UK) Limited | Manufacturing | 1979 |
| Remedium Property Management Ltd | Households | 2023 |
| Rena's Bakery Ltd | Hospitality | 2013 |
| Replastered Ltd | Construction | 2020 |
| Residential Properties Funds Limited | Real estate | 2004 |
| Resphealth Ltd | Health & social care | 2023 |
| Respro-M Limited | Wholesale & retail | 1999 |
| Restaurant Development Consultancy Limited | Professional & scientific | 2011 |
| Retail Local Ltd | Real estate | 2024 |
| Retailpharma Online Limited | Wholesale & retail | 2019 |
| Rethinking Recycling Limited | Other services | 1993 |
| Revitalising Water UK Ltd | Hospitality | 2020 |
| Rexmanor Limited | Professional & scientific | 2004 |
| RFN Capital Limited | Financial services | 2001 |
| RGS London Ltd | Wholesale & retail | 2025 |
| RHC Associates Ltd | Professional & scientific | 2012 |
| Rhian Howell Ltd | Information & communication | 2001 |
| Richard B Paterson Limited | Professional & scientific | 2006 |
| Richard Barman Limited | Construction | 2004 |
| Richard Coveney Draughting Services Limited | Education | 2005 |
| Richard Hansen Limited | Arts & recreation | 2008 |
| Richard Lumb Consulting Limited | Public administration | 2001 |
| Richard. Keating | | 1998 |
| Richards Building Services Limited | Construction | 2003 |
| Richman Accountancy & Payroll Services Ltd | Professional & scientific | 2001 |
| Richmond Advice and Information on Disability (Raid) | Information & communication | 1998 |
| Richmond Carers Centre | Health & social care | 2002 |
| Richmond in House Consulting Limited | Professional & scientific | 2004 |
| Richomed Ltd | Real estate | 2025 |
| Rigault Property Company Limited | Other services | 2007 |
| Right Accountancy & Secretarial Solutions Limited | Professional & scientific | 2003 |
| Right Angle Publishing Limited | Arts & recreation | 1998 |
| Rinse IT OUT Limited | Information & communication | 1996 |
| Rising Bloom Limited | Wholesale & retail | 2021 |
| Ritzy Music Ltd | Other services | 2006 |
| Rivals Digital Media Limited | Wholesale & retail | 2001 |
| River Court (EEL PIE) Limited | Hospitality | 2007 |
| Riverside Arts Centre(The) | Arts & recreation | 1977 |
| Riverside Hi-Fi Limited | Wholesale & retail | 1990 |
| Rivervale Consultants Limited | Professional & scientific | 1997 |
| Rivinia Ltd. | Hospitality | 1996 |
| Rixel Limited | Professional & scientific | 2007 |
| RJ Nash Limited | Construction | 2002 |
| RJ Welding Ltd | Construction | 1998 |
| RJO Consulting Services Limited | Information & communication | 2003 |
| RJS Limited | Wholesale & retail | 2006 |
| RK Developments (UK) Limited | Professional & scientific | 2007 |
| RK Gadgets Ltd | Wholesale & retail | 2019 |
| RKB & SON Building Services Ltd | Construction | 2005 |
| RKS Electronics Limited | Wholesale & retail | 2007 |
| RLR UK Limited | Information & communication | 1998 |
| RMF (UK) Limited | Professional & scientific | 2007 |
| RMU Services Ltd | Information & communication | 2019 |