| Ridgeway Properties (Chatham) Limited | Real estate | 1950 |
| Rikama Investments Limited | Real estate | 2025 |
| Rinnovare 22 Ltd | Other services | 2026 |
| Ripe and Ready Limited | Professional & scientific | 2024 |
| Riverhead HR Consulting Limited | Administrative & support | 2015 |
| RJ & H Clifford Limited | Professional & scientific | 2012 |
| RJB Steel Ltd | Manufacturing | 2011 |
| RKS Kent Ltd | Wholesale & retail | 2025 |
| Roche & Co Ltd | Professional & scientific | 2020 |
| Rockaby Hunter Ltd | Professional & scientific | 2015 |
| Rockits Sensory Limited | Hospitality | 2025 |
| ROHAN01 Ltd | Other services | 2023 |
| Roll Cameras Ltd | Information & communication | 2015 |
| Romyla | Financial services | 2022 |
| Roof FIX Roofing Ltd | Construction | 2026 |
| Rookley Ltd | Administrative & support | 2007 |
| Root CNC Ltd | Professional & scientific | 2022 |
| Rosary Consultancy Ltd | Real estate | 2020 |
| Rosling Asset Management Limited | Real estate | 2005 |
| Ross Project Management and Civil Engineering Services LLP | | 2006 |
| Royal Oak Cottages Management Company Limited | Households | 2002 |
| Rquality Builders Limited | Construction | 2018 |
| RSE Global Ltd | Professional & scientific | 2023 |
| Rtpc Limited | Professional & scientific | 2002 |
| Rubric Creative Communication Limited | Professional & scientific | 2007 |
| Rummery Construction Ltd | Construction | 2013 |
| Russells Yard Management Company Limited | Households | 2019 |
| Rutherford & Partners Limited | Professional & scientific | 2009 |
| Rutherford Construction Company Limited | Real estate | 1946 |
| Rutland Weekend Television (International) Limited | Arts & recreation | 1984 |
| Rutland Weekend Television Limited | Arts & recreation | 1978 |
| RYE School of English UK Limited | Education | 2012 |
| S and a Contracting Ltd | Construction | 2024 |
| S D F M Limited | Information & communication | 2005 |
| S Graham & Associates Limited | Information & communication | 2022 |
| S.B ALL Trades Ltd | Construction | 2025 |
| Sackville Oak Frames Ltd | Manufacturing | 2019 |
| Saintclair Partnership Ltd | Professional & scientific | 2003 |
| Salacia Group Ltd | Wholesale & retail | 2019 |
| Samphire Trust | Administrative & support | 2007 |
| Sandhurst Service Station Ltd | Wholesale & retail | 2010 |
| Sandhurst Smokehouse Ltd | Manufacturing | 2023 |
| Santorini Solutions Limited | Professional & scientific | 2006 |
| Sauvage Homes Ltd | Real estate | 2025 |
| Saxenhurst Luxury Stays LLP | | 2025 |
| Saxon Motor Sport Limited | Manufacturing | 1999 |
| SDS Group Limited | Administrative & support | 1997 |
| SE Car Keys Limited | Wholesale & retail | 2010 |
| Sea Wall Limited | Real estate | 2025 |
| Sean Mcgeachy Limited | Wholesale & retail | 2019 |
| Section Four Company Limited | | 1937 |
| Seventeenfifteen Limited | Professional & scientific | 2022 |
| Sfconsultancies Ltd | Financial services | 2023 |
| Shared Vision Consultancy Ltd | Professional & scientific | 2013 |
| Sharief Ibrahim Consulting Ltd | Professional & scientific | 2025 |
| Shotcrete Services Limited | Construction | 2003 |
| Showrunners Media Ltd | Professional & scientific | 2025 |
| Siasco Limited | Administrative & support | 2014 |
| Siddington Property Limited | Real estate | 2026 |
| Silbury Willow Ltd | Information & communication | 2023 |
| Simpson Property Group Ltd | Transport & logistics | 2024 |
| Sinclair Rental Services Ltd | Real estate | 2025 |
| SIR Walter Scott House Ltd | Real estate | 2004 |
| Sissinghurst Limited | Real estate | 2024 |
| Skep Arts Community Interest Company | Arts & recreation | 2022 |
| Sloan Squared Ltd | Administrative & support | 2017 |
| Smallfield Raceway Ltd | Arts & recreation | 2021 |
| Smart Electrical (Southborough) Limited | Administrative & support | 2014 |
| Smith&Dimet Ltd | Hospitality | 2021 |
| Snell Specialist Services Limited | Professional & scientific | 2022 |
| Socialwize Ltd | Professional & scientific | 2018 |
| Solace Nutrition Ltd | Wholesale & retail | 2019 |
| Sophia Wigram Designs Ltd | Professional & scientific | 2019 |
| SOS Building Services Ltd | Construction | 2022 |
| Soul Sergeants Ltd | Wholesale & retail | 2016 |
| Soulshine Escapes Limited | Professional & scientific | 2025 |
| South Kent Demolition Limited | Construction | 2006 |
| Southeast Retail Ltd | Administrative & support | 2011 |
| Southern Accounting Limited | Professional & scientific | 2018 |
| Southern ELM Developments Limited | Construction | 2010 |
| Southern Farmers Limited | Agriculture & fishing | 2000 |
| Southern Farms & Forestry Ltd | Agriculture & fishing | 2013 |
| Southern Forklift Services Limited | Professional & scientific | 2016 |
| Sovereign Forestry Contractors Limited | Agriculture & fishing | 2013 |
| Sovereign Television Limited | Information & communication | 2008 |
| SP Toiletries 21 Limited | Manufacturing | 2020 |
| Sparkie FIX Ltd | Construction | 2026 |
| Sparkie James Services Ltd | Construction | 2021 |
| Sparkling Spanish Cleaning Supplies Ltd | Wholesale & retail | 2023 |
| Sponjem UK Limited | Professional & scientific | 2010 |
| Spray Concrete Ltd | Financial services | 2009 |
| Spreyer Brothers Leisure Limited | Hospitality | 2004 |
| Spreyer Brothers Limited | Real estate | 1998 |
| Spreyer Brothers Management Limited | Professional & scientific | 2004 |
| Spreyer Destinations Limited | Financial services | 2020 |
| Spreyer Holiday Parks Ltd | Hospitality | 2015 |
| Springbourne Tech Limited | Information & communication | 2013 |
| Spurdown Investments Limited | Real estate | 2005 |
| Spurdown Limited | Real estate | 1963 |
| SRB Contractors Ltd | Construction | 2019 |