| Rocket Scout Ltd | Administrative & support | 2015 |
| Rootz Football Ltd | Arts & recreation | 2020 |
| Rosam Investments Limited | Administrative & support | 2008 |
| Rosie's Cleaning Co Limited | Other services | 2013 |
| ROUT666 Limited | Other services | 2010 |
| ROUTE2TRAVEL Ltd | Administrative & support | 2020 |
| Rowan 3 Ltd | Hospitality | 2025 |
| ROY Douglas Ltd | Construction | 2019 |
| RPB Plumbing Ltd | Construction | 2015 |
| RSJ Property Holdings Limited | Financial services | 2019 |
| S&K Developers Ltd | Real estate | 2023 |
| S.K. Design Consultants Ltd | Professional & scientific | 2016 |
| S.R.I Gambini Logistic Limited | Transport & logistics | 2019 |
| SA Dogan Properties Limited | Real estate | 2025 |
| Saddle Goose Ltd | Manufacturing | 2018 |
| Sage Global Ltd | Wholesale & retail | 2022 |
| Sageward Limited | Real estate | 2010 |
| SAI Private Ltd | Hospitality | 2024 |
| Salad Boxes Limited | Hospitality | 2019 |
| Salmon Property Investment Ltd | Real estate | 2005 |
| Salon Beauty Clinic Ltd | Other services | 2020 |
| Salty Creative UK Ltd | Wholesale & retail | 2021 |
| Samar Accountants Ltd | Professional & scientific | 2021 |
| Samuelg Ltd | Information & communication | 2014 |
| Sapna RAO Limited | Administrative & support | 2024 |
| Sawbridgeworth Moorings Ltd | Transport & logistics | 2021 |
| SB TIX Ltd | Wholesale & retail | 2023 |
| Scalerivals Ltd | Wholesale & retail | 2024 |
| Scene Copywriting Ltd | Professional & scientific | 2024 |
| Sciance Club Ltd | Education | 2025 |
| Securepath Risk Advisory Ltd | Financial services | 2026 |
| Security Trade Products (Epping) Ltd | Wholesale & retail | 2024 |
| Security Trade Products Limited | Construction | 2016 |
| Seinpleut Limited | Other services | 2015 |
| Self Glow Limited | Other services | 2025 |
| Serenity Business Solutions Ltd | Real estate | 2023 |
| Serenity Legal Services Ltd | Professional & scientific | 2021 |
| Serenity Welfare Ltd | Health & social care | 2016 |
| Service 4 U (MK) Limited | Other services | 2019 |
| Seyran Tosun Therapy Services Ltd | Professional & scientific | 2025 |
| SGS PUB Limited | Hospitality | 2019 |
| Shaltout Properties Limited | Real estate | 2023 |
| Shaun Russell Ltd | Information & communication | 2015 |
| Sherriff Stonemasons Limited | Construction | 2012 |
| Shills Electrical Install Limited | Energy | 2016 |
| Shoebill Media Limited | Professional & scientific | 2019 |
| Silvercore Electrical Limited | Construction | 2006 |
| Sima Mehta Art Ltd | Arts & recreation | 2016 |
| Skylution Consult Limited | Information & communication | 2025 |
| Slade Railway and Construction Services Limited | Construction | 2016 |
| Sloane Academy Ltd | Education | 2026 |
| Smart Electrical & Building Supplies Ltd | Construction | 2026 |
| Smart Sports Investment Ltd | Arts & recreation | 2024 |
| Smith Preston Ltd | Real estate | 2026 |
| SMK Legal Ltd | Professional & scientific | 2025 |
| Smoke Station Ltd | Wholesale & retail | 2025 |
| Smokeshed Ltd | Hospitality | 2018 |
| Snide London Limited | Manufacturing | 2016 |
| Snowcrest Properties Ltd | Real estate | 2026 |
| Social Palette Limited | Information & communication | 2026 |
| Societate Ltd | Hospitality | 2021 |
| Sokele Ltd | Professional & scientific | 2019 |
| Soladex Financial Services Ltd | Financial services | 2006 |
| SOLIN365 Ltd | Hospitality | 2024 |
| Solutions HR Ltd | Administrative & support | 2018 |
| Sophia & Amelia Ltd | Construction | 2021 |
| Sorbus Associates Limited | Other services | 2014 |
| Soundstage Audio Vision Limited | Wholesale & retail | 2010 |
| Sparkle Wellness Ltd | Wholesale & retail | 2024 |
| Sparkles I Limited | Administrative & support | 2020 |
| Sparkss Ltd | Construction | 2021 |
| Spencer Marshall Limited | Administrative & support | 2007 |
| SPG Security Ltd | Professional & scientific | 2024 |
| Spice Marchent Ltd | Hospitality | 2024 |
| Spider Byte Ltd | Information & communication | 2016 |
| Sports and Gaming Consultancy Limited | Professional & scientific | 2017 |
| Square Heating Ltd | Construction | 2025 |
| SR Connect Logistics Ltd | Transport & logistics | 2026 |
| SRB Property Holdings Ltd | Real estate | 2013 |
| SRL Windows & Doors Ltd | Construction | 2018 |
| SRS Commercials Limited | Administrative & support | 2016 |
| Ss&D Ventures Limited | Administrative & support | 2015 |
| ST Cross Chambers Residents Management Company Limited | Households | 2023 |
| ST James Developments - London Property Limited Partnership | | 2011 |
| ST. Catharine's Court (Broxbourne) Limited | Professional & scientific | 2000 |
| ST. Georges Knights Storage and Logistics Limited | Transport & logistics | 2025 |
| Stafford Court Management Limited | Households | 1992 |
| Stanley Motors Limited | Wholesale & retail | 2010 |
| Stef and Sons Limited | Construction | 2019 |
| Stone Rescue Ltd | Construction | 2018 |
| STR Homes Freehold Ltd | Real estate | 2023 |
| STR Homes Ltd | Construction | 2023 |
| STR Solution Partners Ltd | Professional & scientific | 2019 |
| Strangicoff Limited | Information & communication | 2012 |
| Studio Naama Ltd | Professional & scientific | 2012 |
| Studio Verde Ltd | Professional & scientific | 2024 |
| Studio-Thirty Five Ltd | Professional & scientific | 2018 |
| Sublime Electrical & Groundwork Services Ltd | Construction | 2021 |
| Success Routes Ltd | Education | 2025 |
| Sun Property Partners Ltd | Real estate | 2016 |