| Raad Consultancy Ltd | Professional & scientific | 2022 |
| Ralfixings Ltd | Wholesale & retail | 2024 |
| RB Utilities Ltd | Construction | 2019 |
| RC Topco Ltd | Financial services | 2026 |
| Real Props Ltd | Information & communication | 2011 |
| Reilly Sets Ltd | Information & communication | 2024 |
| Remi Ajani Ltd | Arts & recreation | 2018 |
| Renfin Afon LAS Hydro Limited | Financial services | 2012 |
| Renfin Corrimony Limited | Energy | 2016 |
| Renfin Hydro Holdco Ltd | Financial services | 2018 |
| Renfin Hydro Ltd | Financial services | 2018 |
| Rengasamy Ltd | Construction | 2021 |
| Revolution Medical Services Ltd | Health & social care | 2024 |
| RG Studio Construction Ltd | Information & communication | 2025 |
| Ricketts Electrics Ltd | Construction | 2023 |
| Ricketts Properties Ltd | Real estate | 2020 |
| Rjpayne Ltd | Construction | 2017 |
| Rob's CUT Limited | Other services | 2003 |
| Robe Carpentry Ltd | Information & communication | 2015 |
| Rockmills Developments Ltd | Information & communication | 2015 |
| Roman Security Group Ltd | Administrative & support | 2020 |
| Rostrevor Court Management Company Limited | Households | 1987 |
| Round 6 Creative Ltd | Administrative & support | 2020 |
| Rowantree Developments Group Limited | Construction | 2026 |
| Ruffsawn Ltd | Information & communication | 2024 |
| RWS Productions Limited | Information & communication | 2020 |
| S a Albreshni Ltd | Health & social care | 2026 |
| S Abraham & Co Ltd | Construction | 2024 |
| S T Production Carpentry Ltd | Information & communication | 2014 |
| S W Mouldings Ltd | Construction | 2011 |
| S&C Capital Ltd | Financial services | 2024 |
| S4 U.K. Limited | Information & communication | 1998 |
| S4I (Seeds for Impact) Ltd | Administrative & support | 2016 |
| Saints Lofts Ltd | Construction | 2025 |
| Samosa Stall Limited | Extraterritorial | 2011 |
| Sapphire Living Solutions Ltd | Financial services | 2025 |
| Sartorial Fit Limited | Manufacturing | 2023 |
| Saturn Property Solutions Ltd | Real estate | 2022 |
| SB Mouldings Ltd | Information & communication | 2024 |
| SBS Technical Limited | Administrative & support | 2009 |
| Scenic Works Ltd | Construction | 2020 |
| SCW Medical Ltd | Health & social care | 2023 |
| Sears Rigging Scaffolding (SRS) Ltd | Information & communication | 2015 |
| SET and Shoot Productions Ltd | Construction | 2022 |
| SET II Stage Limited | Information & communication | 2023 |
| SET Mouldings Ltd | Construction | 2011 |
| SET Tech Ltd | Information & communication | 2011 |
| Set-Est Ltd | Information & communication | 2022 |
| Sets on Legs Ltd | Manufacturing | 2021 |
| Sherbert Solutions Ltd | Administrative & support | 2018 |
| Shorefix Sussex Limited | Construction | 2019 |
| Simao Ltd | Information & communication | 2022 |
| Simha Developments Ltd | Construction | 2026 |
| Simple Locking Solutions Limited | Administrative & support | 2007 |
| Sinclair Property Limited | Real estate | 2002 |
| Sinclair Real Estate Limited | Real estate | 1991 |
| Sixela Business Services Ltd | Administrative & support | 2022 |
| SJB Carp Ltd | Manufacturing | 2022 |
| SJT Plaster Effects Ltd | Construction | 2011 |
| Smart Contents Ltd | Information & communication | 2023 |
| Solinvictus SES Ltd | Construction | 2012 |
| South West Coast Properties Ltd | Real estate | 2022 |
| Southwold Road (Block B) Management Company Limited | Households | 1990 |
| Southwold Road (Block D) Management Company Limited | Households | 1990 |
| Speers Ltd | Information & communication | 2020 |
| SPF Film Services Ltd | Information & communication | 2021 |
| Spinematik Ltd | Manufacturing | 2026 |
| Splendore Properties Ltd | Real estate | 2022 |
| Sport Autonomy Limited | Education | 2024 |
| Springfix (UK) Limited | | 1965 |
| ST Albans Electrical Ltd | Construction | 2011 |
| ST Albans Electricians Limited | Energy | 2021 |
| Stage Make UP Ltd | Information & communication | 2022 |
| Stallion Hounslow Ltd | Real estate | 2025 |
| Staples Services Ltd | Information & communication | 2022 |
| Starrs Alive Ltd | Professional & scientific | 2010 |
| Stop the Card Clash Limited | Professional & scientific | 2014 |
| Stroud House Ltd | Construction | 2025 |
| Studio Brink Ltd | Professional & scientific | 2019 |
| Styling OUT 50 Limited | Wholesale & retail | 2020 |
| Swallowfields Consulting Ltd | Real estate | 2022 |
| Sycamore Court (Fordingbridge) Management Limited | Households | 1999 |
| Sycamore Court Management Co. Limited | Households | 1998 |
| Tabrose Property Solutions Limited | Real estate | 2019 |
| TCM Travel Hub Services Limited | Professional & scientific | 2019 |
| Technique Enterprises Limited | Information & communication | 2009 |
| Tennessvee Limited | Households | 1981 |
| Terux Group Ltd | Financial services | 2025 |
| Terux One Ltd | Construction | 2025 |
| TG Plastering Ltd | Construction | 2022 |
| Thames Short Stays Limited | Real estate | 2023 |
| That's a Wrap Sales Limited | Wholesale & retail | 2003 |
| THE Bath Jeweller Ltd | Wholesale & retail | 2025 |
| THE Brill Property Group Ltd | Real estate | 2024 |
| THE Business Process Guys Ltd | Administrative & support | 2025 |
| THE Drink Consultants Ltd | Wholesale & retail | 2022 |
| THE Gynaecology Partnership Limited | Health & social care | 2011 |
| THE HMO Guru Ltd | Administrative & support | 2025 |
| THE Pilates Workshop Limited | Arts & recreation | 2020 |
| THE Real Smart Home Ltd | Information & communication | 2023 |