| Rckts TR Ltd | Financial services | 2025 |
| Recruit Health Ltd | Administrative & support | 2025 |
| Red Flag Registrations Ltd | Transport & logistics | 2016 |
| REJUVENA8 Ltd | Professional & scientific | 2009 |
| Renewix Group Holdings Ltd | Financial services | 2025 |
| Renewix Group Ltd | Financial services | 2025 |
| Renewix Ltd | Construction | 2024 |
| Renewix Staffing Limited | Administrative & support | 2026 |
| Revstak Ltd | Professional & scientific | 2026 |
| Ridgeway Exotics Limited | Wholesale & retail | 2015 |
| RLT International Limited | Administrative & support | 2017 |
| RLT IP Limited | Administrative & support | 2017 |
| Room 8 (LEE on Solent) Limited | Other services | 2025 |
| Ross House Solent View Limited | Households | 2005 |
| RRT Aviation Limited | Manufacturing | 2022 |
| S Courtney Contractors Limited | Construction | 2003 |
| S&S Properties Group Limited | Real estate | 2025 |
| S2H Limited | Real estate | 2025 |
| S3 Consultancy Services Ltd | Health & social care | 2024 |
| SAN Diego Limited | Other services | 1999 |
| Sandringham Lodge Management Limited | Households | 2004 |
| Santajaydee Limited | Real estate | 2023 |
| SCM Stubbington Limited | Households | 2005 |
| Sea House Management Limited | Households | 2019 |
| Seafire TAP Room Limited | Hospitality | 2023 |
| Seaview Court Residents Association Limited | Hospitality | 1975 |
| Seaward Point Management Ltd | Households | 2020 |
| SEB Furnishings Limited | Manufacturing | 2009 |
| Serrano Seabass Limited | Agriculture & fishing | 2022 |
| Shreejisubscooperb Limited | Wholesale & retail | 2022 |
| Siaco Limited | Professional & scientific | 2023 |
| Silver Trowel Construction Skills Training Academy Limited | Administrative & support | 2016 |
| Silver Trowel Ltd | Education | 2008 |
| Sinoscan UK Limited | Wholesale & retail | 2004 |
| SJ Software Solutions Ltd | Information & communication | 2019 |
| Skysure Aviation Ltd | Other services | 2023 |
| Smart Home Improvement People Ltd | Information & communication | 2018 |
| Smarter Highway Solutions Limited | Construction | 2021 |
| Smarter Highways Group Limited | Financial services | 2025 |
| Smarter Hire Solutions Limited | Administrative & support | 2025 |
| Solent Aerospace Ltd | Professional & scientific | 2020 |
| Solent Care Solutions Ltd | Health & social care | 2023 |
| Solent Construction Recruitment Limited | Administrative & support | 2022 |
| Solent Electrical and Solar Ltd | Construction | 2023 |
| Solent Fire and Security Ltd | Construction | 2018 |
| Solent Fire Protection Services Limited | Administrative & support | 1996 |
| Solent Heights Management Company Limited | Hospitality | 1978 |
| Solent Orthotic Services Limited | Health & social care | 2011 |
| Solent Property Lawyers Limited | Financial services | 2009 |
| Solent Way Computers Ltd | Information & communication | 2019 |
| Solent-Cabs Ltd | Transport & logistics | 2019 |
| SOS Dental Limited | Health & social care | 2016 |
| Source Media Limited | Wholesale & retail | 2004 |
| South Coast Building Group Ltd | Construction | 2016 |
| Southwater Management Company Limited | Households | 1988 |
| Specialist Finance Academy Ltd | Education | 2024 |
| Spera Digital Health Limited | Health & social care | 2019 |
| Spotcom Ltd | Manufacturing | 2015 |
| Spraybooth Care Limited | Professional & scientific | 2013 |
| Squared Away VA Ltd | Professional & scientific | 2026 |
| SRW Business Consulting Ltd | Professional & scientific | 2022 |
| ST Judes Place Management Company Limited | Households | 2022 |
| Standardlinks Services Limited | Administrative & support | 2014 |
| Starbuck Construction Services Limited | Construction | 1999 |
| Stay Dine Explore Limited | Administrative & support | 2025 |
| Steley Surety Ltd | Professional & scientific | 2024 |
| Stellavine Ltd | Wholesale & retail | 2026 |
| Stop & Shop Gosport Ltd | Wholesale & retail | 2023 |
| Studio Solent Ltd | Arts & recreation | 2026 |
| Stuttgart Commercials Ltd | Wholesale & retail | 2024 |
| Style Studio 22 Ltd | Other services | 2020 |
| Subhom LLP | | 2014 |
| Subshreeji Limited | Real estate | 2025 |
| Succeedin Ltd | Education | 2014 |
| Surfersoft Limited | Information & communication | 2011 |
| Swan SPV Ltd | Real estate | 2026 |
| Swann MAY Ltd | Real estate | 2020 |
| Swish Property Management Limited | Real estate | 2012 |
| Sysnet Global Solutions (UK) Limited | Information & communication | 2010 |
| T P Styling Ltd | Other services | 2025 |
| Tasteful Collectibles Ltd | Wholesale & retail | 2015 |
| Technospirit Limited | Real estate | 2023 |
| Tekrekt Limited | Wholesale & retail | 2019 |
| Telmar Consultancy Ltd | Professional & scientific | 2025 |
| THE Allen Estate (Properties) Limited | Real estate | 2022 |
| THE Association of Fleet Professionals Limited | Other services | 2020 |
| THE Bramptons (Sarisbury Green) Management Company Limited | Households | 2006 |
| THE Cabin ( Solent ) Ltd | Wholesale & retail | 2014 |
| THE Denton Family Property Ltd | Real estate | 2026 |
| THE Freelance FD Limited | Professional & scientific | 2006 |
| THE Good Food Firm Ltd | Hospitality | 2024 |
| THE Greenhouse Florist Ltd | Wholesale & retail | 2021 |
| THE Hire Partner Ltd | Administrative & support | 2024 |
| THE Koozai Group Ltd | Professional & scientific | 2021 |
| THE London Freight Club (1953) Limited | Hospitality | 2023 |
| THE Mixing Glass Limited | Manufacturing | 2026 |
| THE Shores Residents Management Company Limited | Households | 2004 |
| THE Specialist Service Partner Ltd | Administrative & support | 2025 |
| Thermoglow Plumbing & Heating Ltd | Construction | 2016 |
| Those Little Extras Ltd | Wholesale & retail | 2020 |