| REC Match Limited | Administrative & support | 2023 |
| Red 14 (Fourteen) Limited | Administrative & support | 1994 |
| Redjuvenate Medical Ltd | Health & social care | 2020 |
| Redline Invest Ltd | Real estate | 2016 |
| Reed Construction Limited | Construction | 2007 |
| Reedstream Investments Ltd | Extraterritorial | 2016 |
| Reframe Research Limited | Professional & scientific | 2007 |
| Regent Croft Limited | Wholesale & retail | 2005 |
| Reggie Sparks Limited | Construction | 2013 |
| Releasing Houses Ltd | Real estate | 2016 |
| Remarkable Capital UK Ltd | Financial services | 2025 |
| Remarkable Hospitality UK Ltd | Wholesale & retail | 2020 |
| Remarkable Hotels (UK) Limited | Hospitality | 2011 |
| Remarkable Investments UK Ltd | Real estate | 2023 |
| Remy Consultancy Ltd | Professional & scientific | 2019 |
| Retinacare Consultants Limited | Professional & scientific | 2011 |
| REX Electrical Services (Hampton) Limited | Construction | 2011 |
| REX Enterprise Ltd | Information & communication | 2021 |
| Rezaee Birch LLP | | 2024 |
| RGM Recruitment Ltd | Administrative & support | 2023 |
| Riccouk Limited | Hospitality | 2026 |
| Richardson AL Investments Ltd | Extraterritorial | 2019 |
| Richbak Limited | Professional & scientific | 2019 |
| Richmond Citizens Advice Bureaux Service | Health & social care | 2001 |
| Richmond Place Freehold Limited | Households | 1997 |
| Richmond Place Management Company Limited | Households | 1988 |
| Richmond Road Investments Limited | Real estate | 2019 |
| Richmond Soup Kitchen CIC | Hospitality | 2025 |
| Richmond Works Ltd | Professional & scientific | 2020 |
| Right Spot Ltd | Real estate | 2019 |
| Riley Emerson Ltd | Other services | 2017 |
| Riparian Ltd | Real estate | 2018 |
| Rise Corporation Ltd | Extraterritorial | 2019 |
| River Homes RTM Company Limited | Households | 2009 |
| River Street Live Limited | Administrative & support | 2014 |
| Riverdale Gardens Residents Company Limited | Households | 1970 |
| Rivermead (Surbiton) Residents Association Limited | Households | 1976 |
| Riverside House (Estates) Limited | Households | 1995 |
| Riverside House (Management) Limited | Households | 1985 |
| Riyala Ltd | Real estate | 2020 |
| RJ Casa Limited | Real estate | 2022 |
| RKB Building Consultants Ltd | Construction | 2026 |
| Rlcurtis Ltd | Other services | 2020 |
| RM Property Partners Ltd | Hospitality | 2016 |
| RNK Hair & Makeup Limited | Arts & recreation | 2018 |
| Roam Ventures Ltd | Professional & scientific | 2026 |
| Robar Music Records Limited | Arts & recreation | 2014 |
| Robert Honeyball Building and Construction Limited | Construction | 2000 |
| Robert Thornton Dart Promotions Ltd | Arts & recreation | 2009 |
| Robinson Plumbing and Heating Limited | Construction | 2026 |
| Robson Craig Limited | Extraterritorial | 2012 |
| Robsons Butcher and Deli Ltd | Wholesale & retail | 2013 |
| Roca Management Services Limited | Professional & scientific | 1982 |
| Rochester House (Teddington) Residents Association Limited | Households | 1971 |
| Rock Solid International Ltd | Wholesale & retail | 2025 |
| Rodborough Properties Ltd | Real estate | 2016 |
| Rodine Properties Ltd | Real estate | 2020 |
| Roger Wilson Consulting LLP | | 2005 |
| Rolle Realty Ltd | Real estate | 2018 |
| Romeo's Dog Grooming Ltd | Other services | 2026 |
| RON Wilkins Property Investments Ltd | Real estate | 2020 |
| Roofing Specialist & Building Services Limited | Construction | 2018 |
| Roosted Limited | Other services | 2023 |
| Roots & Shoots Wellness Foods Ltd | Manufacturing | 2025 |
| Roper Stammers Limited | Professional & scientific | 1951 |
| ROUTE2 Advisors Ltd | Professional & scientific | 2012 |
| ROUTE2PROPERTY Limited | Real estate | 2016 |
| Rowland Property Group Ltd | Extraterritorial | 2022 |
| Roy&Oly Couriers Limited | Transport & logistics | 2018 |
| Roys Reserve Ltd | Households | 2016 |
| RPD A&L Ltd | Real estate | 2015 |
| RPD J&S Ltd | Real estate | 2014 |
| RR Support Services Ltd | Administrative & support | 2021 |
| Rrds Investments Ltd | Extraterritorial | 2019 |
| RS Lettings Limited | Real estate | 2013 |
| RSE Property Limited | Construction | 2015 |
| RSK Legal Services Limited | Information & communication | 2021 |
| Ruby Bell Consultancy Ltd | Professional & scientific | 2026 |
| Ruma Property Invest Ltd | Real estate | 2017 |
| Ruptured Spark Limited | Real estate | 2006 |
| Rushwood Investment Co.,Limited | Real estate | 1959 |
| Rutherswissdevelopments Ltd | Real estate | 2017 |
| Rutland Angling Supplies Limited | Wholesale & retail | 2007 |
| Ryzen Properties UK Ltd | Extraterritorial | 2019 |
| S & a Properties & Investments Ltd | Extraterritorial | 2015 |
| S a B Scaffolding Ltd | Construction | 2015 |
| S a Rutland Limited | Construction | 2006 |
| S M Gotham Ltd | Professional & scientific | 2011 |
| S Thompson Media Ltd | Professional & scientific | 2019 |
| S5 Alpha Capital Ltd | Real estate | 2017 |
| Sack Holdings Ltd | Real estate | 2020 |
| Safe Cars Sales Ltd | Wholesale & retail | 2026 |
| Safe Drive Systems Ltd | Wholesale & retail | 2011 |
| Sait's Consultants Limited | Professional & scientific | 2011 |
| SAK Towers Ltd | Real estate | 2020 |
| Salesnet Limited | Professional & scientific | 1997 |
| Salthouse Consulting Limited | Professional & scientific | 2013 |
| Samaflow Yoga Ltd | Arts & recreation | 2026 |
| Samantha Sung Limited | Wholesale & retail | 2010 |
| Sampson MAY Design Limited | Administrative & support | 2001 |