| Stephen Sports Limited | Wholesale & retail | 2026 |
| Sterling Accounting Limited | Professional & scientific | 2021 |
| Stnly Coaching Ltd | Other services | 2026 |
| Stnly Ltd | Financial services | 2026 |
| Stock Fulfilment Ltd | Wholesale & retail | 2020 |
| Stones and Spells Limited | Wholesale & retail | 2024 |
| Stoney Brook Commercial Limited | Real estate | 2025 |
| Stoney Brook Farm Limited | Financial services | 2018 |
| Stoney Brook Weddings Ltd | Arts & recreation | 2023 |
| Stoppoint Limited | Transport & logistics | 2020 |
| Strand (Ryde) Management Company Limited | Households | 2022 |
| Strategic Clarity Limited | Professional & scientific | 2024 |
| Street Souvlaki Ltd | Wholesale & retail | 2023 |
| Sumika Polymer Compounds (Europe) Ltd | Professional & scientific | 1991 |
| Sumika Polymer Compounds (UK) Ltd | Manufacturing | 1991 |
| Sumo Acquisitions Limited | Construction | 2017 |
| Sumo Geophysics Limited | Administrative & support | 1986 |
| Sumo Holdings Limited | Professional & scientific | 2008 |
| Sumo Services Limited | Construction | 2001 |
| Sun of a Beach (Purbrook) Limited | Other services | 2019 |
| Sunrise and Beauty Ltd | Other services | 2021 |
| Super Games World Limited | Wholesale & retail | 2022 |
| Superyacht Doc's Limited | Other services | 2001 |
| Sussex and Hampshire Weddings Ltd | Hospitality | 2023 |
| Sutton Primary Care Networks Sutton Training Hub C.I.C. | Health & social care | 2024 |
| SVG88 Limited | Transport & logistics | 2012 |
| Sweet Waffles Ltd | Hospitality | 2025 |
| Switch International Limited | Wholesale & retail | 1996 |
| Sync OR Swim Events LLP | | 2024 |
| Synergy Global Ltd | Wholesale & retail | 2017 |
| T & H Contract Services Limited | Administrative & support | 1998 |
| T & M Landscapes & Construction Limited | Administrative & support | 2025 |
| T D and S (Hampshire) Ltd | Construction | 2015 |
| T&L Industrial Roofing Ltd | Construction | 2026 |
| T&T Landscape Ltd | Administrative & support | 2023 |
| T.H.F. Decorators Limited | Construction | 2008 |
| T1 Lettings Limited | Real estate | 2009 |
| Talbro Services Limited | Construction | 2010 |
| Tax Advisors Espresso Ltd | Professional & scientific | 2025 |
| TC Composites Ltd | Manufacturing | 2021 |
| Tc-Connect Ltd | Transport & logistics | 2024 |
| Teleplan UK Limited | Other services | 1998 |
| TEN4SECURITY Ltd | Administrative & support | 2018 |
| Terasa Ltd | Manufacturing | 2017 |
| Terratrek Campers Ltd | Manufacturing | 2025 |
| Tertulia Language Ltd | Education | 2014 |
| Test and Measure Limited | Information & communication | 2014 |
| Testarama Limited | Information & communication | 2016 |
| TGS Entertainment Limited | Information & communication | 2021 |
| TGS Stores Limited | Wholesale & retail | 2025 |
| TH Groundworks and Civils Ltd | Construction | 2024 |
| TH Performance Ltd | Wholesale & retail | 2020 |
| THE Abseilers Limited | Construction | 2017 |
| THE Afrocentric Beauty Alchemist Ltd | Manufacturing | 2024 |
| THE Aldersgate and Moorgate Talks Trust | Other services | 2014 |
| THE Alternative Dramatic Arts Academy (Tadaa) Ltd. | Arts & recreation | 2008 |
| THE Art of Barbers Limited | Other services | 2020 |
| THE Barber & the Stylist Ltd | Other services | 2026 |
| THE Barber Shop at NO 4 Ltd | Other services | 2018 |
| THE Beauty Studio & Pro Products Ltd | Wholesale & retail | 2023 |
| THE Business Hub Group Ltd | Professional & scientific | 2026 |
| THE BW Sound Ltd | Information & communication | 2012 |
| THE Canvassing Team Ltd | Other services | 2024 |
| THE Causeway (Petersfield) Management Company Limited | Households | 2007 |
| THE Family Solutions Practice Limited | Professional & scientific | 2011 |
| THE Fensome Group Ltd | Wholesale & retail | 2022 |
| THE Free Palleteers Ltd | Wholesale & retail | 2023 |
| THE Freire Estate Ltd | Real estate | 2022 |
| THE Garage Havant Ltd | Wholesale & retail | 2026 |
| THE Graphics Line Limited | Information & communication | 2003 |
| THE Homechord Collective CIC | Education | 2026 |
| THE Little Dreamers Project Ltd | Wholesale & retail | 2025 |
| THE Manor Court Residents Association (Havant) Limited | Households | 1989 |
| THE Manor Trust Bedhampton | Hospitality | 2005 |
| THE Mila Group Ltd | Real estate | 2022 |
| THE Natural Denture Clinic Limited | Manufacturing | 2010 |
| THE Newport (I.W.) & District Rifle Club Limited | Arts & recreation | 2024 |
| THE Oven Chap Ltd | Administrative & support | 2026 |
| THE PIT Gym Ltd | Arts & recreation | 2026 |
| THE Portsmouth Arts Centre Company Limited | Real estate | 2009 |
| THE Prosecco Palette Limited | Hospitality | 2025 |
| THE Radiance Skin Lounge Ltd | Other services | 2026 |
| THE Redeemed Christian Church of GOD Agape Centre Havant | Other services | 2025 |
| THE Reversed Shakespeare Company Ltd | Arts & recreation | 2021 |
| THE Roffee Coffee Co. Ltd | Wholesale & retail | 2025 |
| THE Roofing Specialists Ltd | Construction | 2022 |
| THE Rusty PUB Company Ltd | Hospitality | 2016 |
| THE Spring Arts & Heritage Centre Co | Arts & recreation | 1987 |
| THE Studio: Havant Community Interest Company | Arts & recreation | 2026 |
| THE Training Huts Limited | Administrative & support | 2007 |
| Thebluechair Ltd | Professional & scientific | 2016 |
| Theta Systems Ltd | Professional & scientific | 2018 |
| Theva Ventures Ltd | Hospitality | 2021 |
| Thistle BEE Ltd | Arts & recreation | 2016 |
| Thomas Paine Caterers Limited | | 1973 |
| Thornbrook Developments Limited | Wholesale & retail | 1974 |
| Thread & Thicket Ltd | Wholesale & retail | 2025 |
| Thrive Financial Services Limited | Professional & scientific | 2023 |
| Tiffany's Hair and Beauty Limited | Other services | 2012 |
| Timberedge Joinery Ltd | Manufacturing | 2025 |