| Roman Express 2 Ltd | Wholesale & retail | 2024 |
| Roman Express Store Limited | Wholesale & retail | 2025 |
| Romeza Limited | Real estate | 2023 |
| Rootsshoots Creative CIC | Professional & scientific | 2026 |
| Ross Baines Art Limited | Arts & recreation | 2018 |
| Rouse & Southwell Electrical Ltd | Construction | 2022 |
| RPO Services Ltd | Construction | 2024 |
| RR Takeaways Ltd | Hospitality | 2025 |
| Rrlv Ltd | Wholesale & retail | 2026 |
| RS Emporium Ltd | Wholesale & retail | 2025 |
| RST Property Management Ltd | Real estate | 2020 |
| Runnacles Close Management Company Limited | Households | 2018 |
| RV INT Ltd | Wholesale & retail | 2023 |
| RVP Essex Ltd | Construction | 2024 |
| Rwsco Ltd | Real estate | 2019 |
| Ryno Security Systems Limited | Construction | 2015 |
| S B Developments (UK) Limited | Construction | 2002 |
| S E Climate Solutions Ltd | Energy | 2020 |
| S Friel Engineering Ltd | Manufacturing | 2025 |
| S G Roofing Contractors Limited | Construction | 2025 |
| S Sumner Property Ltd | Real estate | 2017 |
| S Tulip Carpentry Ltd | Construction | 2023 |
| S Yeldham Ltd | Hospitality | 2023 |
| S&J Voids Limited | Construction | 2025 |
| S. Harrison & SON Limited | Real estate | 1981 |
| S. Louise Robinson Limited | Professional & scientific | 2023 |
| S.S.C. Property Services Limited | Construction | 2002 |
| S6 Cleaning Ltd | Administrative & support | 2020 |
| S6 Security Limited | Other services | 2025 |
| SA Imports Limited | Wholesale & retail | 2023 |
| Safetymen Ltd | Education | 2008 |
| Saffari Property Holdings Ltd | Real estate | 2026 |
| Sainica Solution Ltd | Administrative & support | 2025 |
| Sainica’S Solution Ltd | Administrative & support | 2025 |
| Saint Business Development Limited | Administrative & support | 2021 |
| Saint Financial Group Limited | Professional & scientific | 2019 |
| Saint Global Limited | Professional & scientific | 2021 |
| Sales Remedy Limited | Professional & scientific | 2014 |
| Samson Property Services Ltd | Construction | 2025 |
| Samsons Electrical Services Ltd | Construction | 2022 |
| SAN Express Ltd | Wholesale & retail | 2021 |
| Sandpaper Events Limited | Arts & recreation | 2016 |
| Sandra I Ltd | Real estate | 2022 |
| Sandunya Business Finance Limited | Administrative & support | 2014 |
| Sandy Crowe Limited | Education | 2005 |
| Sarah ANN Dobbs Ltd | Extraterritorial | 2025 |
| Sari Kirmizi Limited | Hospitality | 2023 |
| Sava Marketing Limited | Professional & scientific | 2019 |
| Save a Live Ditch the Knife Limited | Education | 2022 |
| Savio Investment Limited | Construction | 2013 |
| SBG Homes Limited | Real estate | 2024 |
| SC Plumbing and Heating Services Ltd | Construction | 2024 |
| Scandia Refrigeration Limited | Manufacturing | 1997 |
| SCB on Site Management Soultions Ltd | Construction | 2019 |
| Scotts Construction Services Ltd | Construction | 2022 |
| Scrap Direct Ltd | Water & waste | 2013 |
| Scratch Free Ltd | Extraterritorial | 2018 |
| Screw YOU Ltd | Construction | 2026 |
| SDL Paintworks Ltd | Wholesale & retail | 2022 |
| SDM Partnership Ltd | Professional & scientific | 2011 |
| Sea Social Limited | Professional & scientific | 2023 |
| Sea Witch Crafts Ltd | Manufacturing | 2025 |
| Seabed Power Ltd | Administrative & support | 2021 |
| Secam Security Systems Ltd | Administrative & support | 2014 |
| Seconds OUT Academy of Youth C.I.C. | Education | 2023 |
| Seconds OUT Ltd | Arts & recreation | 2019 |
| Seconds OUT Sandwich Bar Ltd | Hospitality | 2022 |
| Seekerbase Limited | Information & communication | 2025 |
| Seerees Ltd | Health & social care | 2016 |
| Select Auto Centre Limited | Wholesale & retail | 2002 |
| Select Consult Ltd | Professional & scientific | 2018 |
| Self Storage Brantham Ltd | Administrative & support | 2026 |
| Selwyn DIP Limited | Professional & scientific | 2017 |
| Send Sensation CIC | Other services | 2023 |
| Serenity Consultancy Limited | Health & social care | 2012 |
| Sevenfold Distribution Limited | Wholesale & retail | 2026 |
| SFH Services Ltd | Transport & logistics | 2018 |
| SH Harding Ltd | Financial services | 2025 |
| Shammades Healthcare Service Ltd | Public administration | 2022 |
| Sharona Ltd | Real estate | 2018 |
| Shaula Solutions Ltd | Information & communication | 2011 |
| Sherwin Business Systems Limited | Information & communication | 2004 |
| Shiners Cleaning Services Ltd | Administrative & support | 2012 |
| Shirley Mspl Ltd | Construction | 2021 |
| Shivai Luxe Ltd | Wholesale & retail | 2025 |
| SHO on Point Limited | Wholesale & retail | 2025 |
| Showing UP Ltd | Professional & scientific | 2018 |
| SHP Maintenance Ltd | Administrative & support | 2024 |
| Shree Krishna Deli Ltd | Hospitality | 2024 |
| Shuborna Limited | Households | 2025 |
| Sigma Compliance Solutions Ltd | Professional & scientific | 2025 |
| Signs Made Easy Limited | Manufacturing | 2008 |
| Silver Linings Group Ltd | Professional & scientific | 2022 |
| Silver Shutter Photography Ltd | Professional & scientific | 2012 |
| Silverline Care Solutions Limited | Health & social care | 2025 |
| Silvexo Limited | Administrative & support | 2026 |
| Simmonds Properties Ltd | Real estate | 2026 |
| Simply Thoughtful Gifts Ltd | Wholesale & retail | 2024 |
| SIN Santa Ltd | Hospitality | 2025 |
| Sipsters Group Holdings Ltd | Wholesale & retail | 2026 |