| R1 Electrical Installations Ltd | Construction | 2014 |
| Rabel Properties Limited | Real estate | 2021 |
| Radiator Productions Ltd | Information & communication | 2017 |
| Rainbow Path Publishing Limited | Information & communication | 2005 |
| Rapidsurvey Limited | Households | 1995 |
| Rata Tree Limited | Agriculture & fishing | 2009 |
| RAY Dodd Limited | Education | 2017 |
| RDC Consultancy Associates Limited | Professional & scientific | 2012 |
| RE Love the Preloved Ltd | Wholesale & retail | 2021 |
| Reaction Information Security Ltd | Information & communication | 2009 |
| Red Boots Marketing Limited | Professional & scientific | 2021 |
| Red Construction Services Limited | Professional & scientific | 2016 |
| Red HUT Media Ltd | Information & communication | 2021 |
| Red Lion Hernhill Ltd | Hospitality | 2022 |
| Red Tractor Food Assurance Ltd. | Hospitality | 2000 |
| Redhead Broadcast Limited | Information & communication | 2024 |
| Redline Housing Consultancy Limited | Professional & scientific | 2025 |
| Redsquare Architects Ltd | Professional & scientific | 2012 |
| Redwood Data Ltd | Information & communication | 2022 |
| Rees Mccann Limited | Professional & scientific | 2020 |
| Refill Faversham Ltd | Wholesale & retail | 2022 |
| Reformer at the Barn Cambridge Ltd | Arts & recreation | 2026 |
| Reformer at the Barn Limited | Arts & recreation | 2024 |
| Renosud Limited | Information & communication | 2026 |
| Repurpose My Socials (RMS) Ltd | Information & communication | 2026 |
| Resintranced Ltd | Construction | 2019 |
| Reurban Limited | Real estate | 2025 |
| RG Investments Kent Ltd | Financial services | 2023 |
| RH & RW Clutton Development Limited | Real estate | 2023 |
| RH & RW Clutton Property Limited | Real estate | 2020 |
| Rhino and SAM Holdings Limited | Financial services | 2025 |
| Riddell Films Ltd | Information & communication | 2019 |
| Right Report Inventory Services Limited | Professional & scientific | 2020 |
| Risdon Contract Services Limited | Administrative & support | 2012 |
| Risdon Renovations Limited | Construction | 2021 |
| Riverbourne Developments Ltd | Construction | 2020 |
| Riverdale Interiors Ltd | Administrative & support | 2011 |
| RJP Developments Limited | Extraterritorial | 2011 |
| RJT Services Ltd | Construction | 2024 |
| RMT Catering Limited | Hospitality | 2016 |
| Roadcap UK Ltd | Transport & logistics | 2025 |
| Roan Investments Limited | Hospitality | 2021 |
| ROB Crayford Ltd | Professional & scientific | 2024 |
| Robert Lamb Academy Ltd | Education | 2025 |
| Rocket Hair Professional Ltd | Other services | 2024 |
| Rockley Consultancy Limited | Professional & scientific | 2025 |
| Roebuck Estates Ltd | Real estate | 2008 |
| ROK UK Limited | Real estate | 2001 |
| Roker Regulatory Consulting Ltd | Professional & scientific | 2020 |
| Roof LAB Ltd | Construction | 2025 |
| Rope 2 Rope UK Ltd | Construction | 2014 |
| Rorke Holdings Limited | Financial services | 2003 |
| Rosewood Grove Management Company Limited | Real estate | 2015 |
| Routestock CIC | Education | 2018 |
| Rouy Holdings Limited | Financial services | 2025 |
| Rouy Investments Limited | Real estate | 2025 |
| Rowansbrook Limited | Households | 1993 |
| Royal Mews RDA | Education | 2013 |
| RRB Contracts Limited | Administrative & support | 2009 |
| RRB Window Cleaning (Domestic) Limited | Administrative & support | 2021 |
| RS AI & Data Limited | Professional & scientific | 2024 |
| RTI Industry Limited | Manufacturing | 1999 |
| RTJ and Kert Company Limited | Financial services | 2024 |
| RUF Records Limited | Wholesale & retail | 2012 |
| Rutley RE Ltd | Administrative & support | 2026 |
| Rvkb Consultants Ltd | Professional & scientific | 2025 |
| RWF Contracts Ltd | Real estate | 2024 |
| S & a Steel Services Limited | Construction | 2005 |
| S & J French Construction Ltd | Construction | 2025 |
| S & K Mechanical (UK) Limited | Construction | 2010 |
| S E Property Development Limited | Real estate | 2017 |
| S G Window Cleaning Ltd | Administrative & support | 2016 |
| S&D Darting Dynamics Ltd | Wholesale & retail | 2025 |
| S.C.& J.H.Berry Ltd | Agriculture & fishing | 1948 |
| Saddlesdane Equestrian Supplies Limited | Wholesale & retail | 2024 |
| Safari Retail Logistics Limited | Information & communication | 2015 |
| Safehands Consultants Ltd | Professional & scientific | 2024 |
| Safenest Childcare Limited | Other services | 2025 |
| Safi's 98 Limited | Wholesale & retail | 2024 |
| Saivinayak Trading Limited | Administrative & support | 2010 |
| Salix Business Machines Limited | Information & communication | 2019 |
| Salvadora Property Limited | Real estate | 1999 |
| Samantha Hill Limited | Wholesale & retail | 2017 |
| Sanill Holdings Limited | Construction | 2022 |
| Sarre Properties Limited | Construction | 2006 |
| SAS Works Ltd | Manufacturing | 2023 |
| Saxon Shore Limited | Real estate | 2016 |
| SB Groundwork Ltd | Construction | 2021 |
| SB Social Work Insights Ltd | Health & social care | 2025 |
| Scaleup Studios Ltd | Wholesale & retail | 2024 |
| Scallywag Creative Ltd | Information & communication | 2025 |
| SCL Contract Services Limited | Transport & logistics | 2020 |
| Scott Anderson Ltd | Hospitality | 2007 |
| Scragged Oak Stays Limited | Hospitality | 2023 |
| Scragham Investments Ltd | Financial services | 2023 |
| Scuffaway Ltd | Wholesale & retail | 2020 |
| SDI Belle Ltd | Transport & logistics | 2024 |
| SDS Lining Limited | Construction | 2024 |
| Search Trinity Limited | Professional & scientific | 2025 |
| Second Time Ltd | Hospitality | 2026 |