| ROB Watkins Builders Limited | Construction | 2018 |
| Robert Ryan Real Estate Limited | Real estate | 2017 |
| Robertson & Fryer Limited | Wholesale & retail | 2025 |
| Rocket Internet Limited | Information & communication | 2008 |
| Roger Creamer Limited | Arts & recreation | 2011 |
| Rosary Goats' Cheese Limited | Manufacturing | 2002 |
| Rumble in the Jungle II Limited | Arts & recreation | 2024 |
| Rushlight Films Limited | Information & communication | 2024 |
| Rvive Ltd | Information & communication | 2024 |
| Rvlc Limited | Administrative & support | 2017 |
| S Metal Recycling Ltd | Water & waste | 2012 |
| S.H. Takeaway Limited | Hospitality | 2015 |
| Safety & Assessment Services Limited | Public administration | 1996 |
| Sallco Tools Limited | Other services | 1995 |
| Sammamish Limited | Information & communication | 2018 |
| Sarum Studio Limited | Arts & recreation | 2014 |
| SBM Flatroofing Limited | Construction | 2005 |
| SC Scaffolding Limited | Construction | 2026 |
| Scamp Solutions Limited | Professional & scientific | 2015 |
| Scamp Speakers Limited | Administrative & support | 2019 |
| Scarlet Ridge Limited | Wholesale & retail | 2023 |
| Schepens International Limited | Transport & logistics | 2004 |
| Scorpion Protection Services Limited | Administrative & support | 2015 |
| Seamariner Towage & Ports Services Limited | Transport & logistics | 2025 |
| Seamariner UK Holdings Limited | Administrative & support | 2024 |
| Seemore Media Limited | Administrative & support | 2009 |
| Sergio Management Limited | Real estate | 2014 |
| Sibbons Christie Roofing & Building Limited | Construction | 2025 |
| Silhouette B.G Limited | Construction | 2012 |
| Simon Hutchings Building & Maintenance Ltd | Construction | 2013 |
| Simon Martin Rural Contracting Limited | Administrative & support | 2016 |
| Simple Draw Ltd | Information & communication | 2023 |
| Skaill IT Services Limited | Information & communication | 2021 |
| Smart Consulting Services Ltd | Information & communication | 2003 |
| Smartee Property Limited | Real estate | 2022 |
| Smoke Club Limited | Arts & recreation | 2008 |
| Solent Contract Interiors Ltd | Manufacturing | 2019 |
| Solent Medical Services Limited | Health & social care | 2007 |
| Soles and Toes Limited | Health & social care | 2017 |
| Soup Studios Limited | Administrative & support | 2025 |
| South Winchester Properties Limited | Construction | 1999 |
| Southern Cross Consulting Limited | Information & communication | 2005 |
| SP Vision Wealth Limited | Financial services | 2014 |
| Spkg Properties Limited | Real estate | 2016 |
| Sppseyes Limited | Health & social care | 2016 |
| Spray Solutions Ltd | Manufacturing | 2020 |
| Spring Films Ltd | Information & communication | 2006 |
| Stella Media Limited | Professional & scientific | 2015 |
| Stellar Lettings Limited | Real estate | 2021 |
| Strangely Named Limited | Information & communication | 2011 |
| Strongman Engineering Consultants Ltd | Professional & scientific | 2009 |
| Super Consultants International Education Ltd | Education | 2020 |
| Super Poly Holdings Ltd | Administrative & support | 2022 |
| Super Poly Ltd | Administrative & support | 2011 |
| Super Tutors International Education Ltd | Education | 2018 |
| Sustain Smiles Limited | Health & social care | 2025 |
| SV Clubs Limited | Hospitality | 2022 |
| SV Property Holding Limited | Real estate | 2022 |
| SW Cctv Limited | Real estate | 2022 |
| SW Snacks Limited | Real estate | 2022 |
| SW8 Limited | Real estate | 2007 |
| Systemic Consciousness Limited | Education | 2023 |
| T R Adams Carpentry & Construction Ltd | Construction | 2016 |
| Target Molecules Limited | Manufacturing | 1998 |
| Team Greens South Ltd | Administrative & support | 2021 |
| Tekguys Limited | Information & communication | 2019 |
| Thane Group Limited | Financial services | 2019 |
| THE Back Garden Chiropractic Clinic Ltd | Health & social care | 2019 |
| THE Beauty Room (South) Ltd | Other services | 2018 |
| THE Chandlers Ford Barbershop Ltd | Other services | 2018 |
| THE Contract Management Group Ltd | Other services | 2022 |
| THE Contract Shop Limited | Other services | 2010 |
| THE Craft Beer Bottling Company Limited | Other services | 2013 |
| THE F1 Chefs Ltd | Hospitality | 2007 |
| THE Fireplace Warehouse (Andover) Limited | Wholesale & retail | 2002 |
| THE Personal Archive Company Limited | Professional & scientific | 2006 |
| THE Plastering & Rendering Company Ltd | Construction | 2025 |
| THE Space Between Sports Limited | Administrative & support | 2020 |
| THE Therapy Yard Ltd. | Health & social care | 2021 |
| THM Haulage Ltd | Transport & logistics | 2021 |
| Tina Jerome Garden Design Limited | Administrative & support | 2023 |
| Toca Equity Group Limited | Professional & scientific | 2017 |
| Topbox Carpentry Ltd | Manufacturing | 2020 |
| Totton Glass Limited | Wholesale & retail | 1965 |
| Towu Investments Ltd | Real estate | 2020 |
| Tracelogic Limited | Information & communication | 2015 |
| Trilbys (Solent) Limited | Other services | 2016 |
| Trusty Living Ltd | Households | 2020 |
| TTL Chiltern Property Limited | Administrative & support | 1993 |
| TW Marine Joinery Ltd | Construction | 2019 |
| Umaks Franchise Ltd | Education | 2020 |
| Univision Ltd | Administrative & support | 2017 |
| Univision Property Ltd | Real estate | 2022 |
| Uprated Ltd | Information & communication | 2014 |
| Utilita Field Services Limited | Manufacturing | 2006 |
| Utilita GAS Limited | Extraterritorial | 2003 |
| Utility Services (Southern) Limited | Manufacturing | 2023 |
| Van Heerden & Associates Limited | Professional & scientific | 2012 |
| Vape Venders Limited | Other services | 2023 |
| Vauxvend Ltd | Arts & recreation | 2026 |