| RO Horizons Limited | Education | 2025 |
| ROB Nagda-Swainson Ltd | Professional & scientific | 2020 |
| Rocdol Ltd | Administrative & support | 2020 |
| Rocket Books Limited | Extraterritorial | 2021 |
| Rockets Academy 2 Ltd | Education | 2025 |
| Roma Interiors Limited | Wholesale & retail | 2005 |
| Ronicole Private Limited | Health & social care | 2014 |
| Rooted Living Ltd | Real estate | 2022 |
| Roseacre Cottage Dental Practice Limited | Health & social care | 2012 |
| RPE M&E Ltd | Construction | 2025 |
| RRW Investments Ltd | Real estate | 2015 |
| Rsqs Limited | Professional & scientific | 2012 |
| Russell Trading and Training Group Limited | Other services | 2013 |
| Russell Trading Investments Limited | Other services | 2013 |
| RVF Holding Limited | Financial services | 2022 |
| RVS Developments Limited | Construction | 2008 |
| RW Building Services Ltd | Real estate | 2015 |
| Ryan Allen Property Ltd | Real estate | 2016 |
| Rzysko Ltd | Professional & scientific | 2021 |
| S D Decorators Ltd | Construction | 2014 |
| S Ripley Investments Limited | Professional & scientific | 2025 |
| S&P Window Tint Ltd | Wholesale & retail | 2025 |
| SAD OWL Studios Limited | Information & communication | 2021 |
| Sadie's Coaching Ltd | Health & social care | 2025 |
| Safe Ukation Ltd | Other services | 2022 |
| Safer to BE Seen Ltd | Manufacturing | 2012 |
| Saferack Limited | Wholesale & retail | 2011 |
| Sagitta Woodbridge LLP | | 2021 |
| SAJ & Yash Transport Ltd | Transport & logistics | 2026 |
| Salluz Developments Limited | Construction | 2018 |
| Salluz Ltd | Professional & scientific | 2016 |
| Saltway Court (Whitstable) Management Company Limited | Households | 2002 |
| Samuel Court Margate Freehold Limited | Households | 2024 |
| Samuel Marketing Limited | Information & communication | 2020 |
| Sandco 31 Limited | Construction | 2000 |
| Sandford-Hodges Ltd | Professional & scientific | 2017 |
| Sandpiper Court (Margate) Limited | Households | 2011 |
| Sandy Coffee Ltd | Hospitality | 2025 |
| Sanu Retail Ltd | Wholesale & retail | 2019 |
| Sarah Zetler - Consulting Psychology Practice Ltd | Health & social care | 2025 |
| Sardinia Restaurant Ltd | Hospitality | 2019 |
| Sargeant Heating & GAS Ltd | Construction | 2019 |
| Savoir Circle Limited | Real estate | 2016 |
| SBS Refrigeration & Electrical Services Ltd | Administrative & support | 2016 |
| SC & B Services Limited | Administrative & support | 2021 |
| Scancon Architects Limited | Professional & scientific | 2005 |
| Scarlett Store Ltd | Wholesale & retail | 2020 |
| Scholarpath Ltd | Education | 2024 |
| Schooner Walk Investments Limited | Extraterritorial | 2019 |
| SCJ Creative Artworker Ltd | Real estate | 2025 |
| Scootaheadz Ltd | Wholesale & retail | 2012 |
| Scorcha Skate School Ltd | Arts & recreation | 2022 |
| Scott J Roberts Limited | Real estate | 2009 |
| Scrivener Financial Ltd | Financial services | 2015 |
| Seamless Aluminium Ltd | Construction | 2024 |
| Sean Hibbert Associates Limited | Professional & scientific | 2025 |
| Seasider Pubs Ltd. | Hospitality | 2014 |
| Second Body Ltd | Extraterritorial | 2015 |
| Secret Caravans Ltd | Wholesale & retail | 2024 |
| Sector 7 Limited | Information & communication | 2022 |
| Security Care When Your NOT There Limited | Financial services | 2019 |
| Seeds Care Ltd | Administrative & support | 2017 |
| SEI Identification Solutions Ltd | Manufacturing | 1946 |
| Sellie Ltd | Other services | 2019 |
| Semper Health Ltd | Financial services | 2026 |
| Serene Hair Ltd | Other services | 2013 |
| Serenity Broadstairs Ltd | Other services | 2022 |
| Serenity Cubs Limited | Construction | 2015 |
| Sericol INK Limited | Manufacturing | 2002 |
| Sericol Limited | Manufacturing | 1965 |
| Sermax Group UK Ltd | Wholesale & retail | 2025 |
| Service Sound Limited | Information & communication | 2006 |
| Sesmath Limited | Education | 2021 |
| SFP Estates Limited | Real estate | 2021 |
| SG Install Ltd | Other services | 2015 |
| SG Ports and Logistics Consultants Limited | Professional & scientific | 2023 |
| Shades Outdoor Solutions Ltd | Manufacturing | 2024 |
| Shake Bristol Ltd | Wholesale & retail | 2006 |
| Sharks Swim Backwards Limited | Information & communication | 2025 |
| Sheppey Road Enterprises Limited | Extraterritorial | 2018 |
| Sherimedia Ltd | Professional & scientific | 2018 |
| Shift AI Events Ltd | Administrative & support | 2026 |
| Shillito Consulting Limited | Wholesale & retail | 2001 |
| Shirtforce CIC | Wholesale & retail | 2025 |
| Shoot Simple Ltd | Administrative & support | 2016 |
| Shore Excursions and Transfers Ltd | Administrative & support | 2019 |
| Shoreline Consultants Ltd | Professional & scientific | 2022 |
| Shutter Events Limited | Administrative & support | 2022 |
| Sicur Developments Ltd | Real estate | 2016 |
| Sigmae Limited | Professional & scientific | 2019 |
| Sigtrap Ltd | Information & communication | 2014 |
| Silent Gliss Global Limited | Manufacturing | 2012 |
| Silent Gliss Limited | Manufacturing | 1954 |
| Silent Thunder Ventures Limited | Other services | 2026 |
| Silpro Extrusions Ltd | Manufacturing | 2007 |
| Silver Bear Marketing Limited | Manufacturing | 1987 |
| Silver Script Games Ltd | Information & communication | 2022 |
| Silvercrest Construction Limited | Construction | 2000 |
| Silvercrest Education Ltd | Education | 2025 |
| Silvercrest Property LLP | | 2009 |