| Southern Despatch Ltd | Transport & logistics | 2023 |
| Southern Property Lettings Ltd | Real estate | 2022 |
| Southern Ventilation Installation Limited | Energy | 2015 |
| Soyturk Ltd | Other services | 2024 |
| Spinach Consultancy Ltd | Administrative & support | 2013 |
| Sprayline Plastering Limited | Construction | 2013 |
| Sprayline Rendering Ltd | Construction | 2023 |
| Square and Compass Holdings Limited | Construction | 2026 |
| ST Philip's Books Ltd | Wholesale & retail | 2009 |
| Stanbridge Motors Holdings Ltd | Financial services | 2024 |
| Starstruc Ltd | Real estate | 2025 |
| Stations Pizza Ltd | Hospitality | 2024 |
| Steve Budd Properties Ltd | Real estate | 2018 |
| Steve Hill Coaching & Consultancy Ltd | Administrative & support | 2024 |
| Stone Broadstone Ltd | Other services | 2015 |
| Stoneygate Holdings Limited | Professional & scientific | 2017 |
| Stour Riverside Industrial Park Limited | Real estate | 2010 |
| Strivegreen Properties Limited | Real estate | 1996 |
| Stuart Hodgson Ltd | Information & communication | 2024 |
| Studybox Limited | Education | 2016 |
| Suitable Consulting Ltd | Professional & scientific | 2020 |
| Suitable Estate Agents Ltd | Real estate | 2016 |
| Suitable Financial Planning Ltd | Financial services | 2017 |
| Suitable Finlife Planning Ltd | Financial services | 2017 |
| Suitable Legacy Planning Ltd | Financial services | 2016 |
| Suitable Life Group Ltd | Professional & scientific | 2024 |
| Suitable Life Planning Ltd | Financial services | 2020 |
| Suitable Money Advice Ltd | Financial services | 2016 |
| Sun Studio (New Milton) Ltd | Administrative & support | 2026 |
| Superhawk Marine Limited | Manufacturing | 2002 |
| Supply Partners Direct Ltd | Wholesale & retail | 2021 |
| Supply Tree Recruitment Ltd | Administrative & support | 2019 |
| Surge Design Ltd | Professional & scientific | 2020 |
| SW Homes (Poole) Ltd | Construction | 2024 |
| Switchedon-Netzero Limited | Energy | 2022 |
| Switchedonsavings Ltd | Energy | 2011 |
| Symes Property Management Ltd | Real estate | 2019 |
| Symes Wealth Management Ltd | Professional & scientific | 2014 |
| Symmetry Architecture Ltd. | Professional & scientific | 2019 |
| T & N Heating & Renewables Ltd | Construction | 2024 |
| Tailored Home Improvements Limited | Construction | 2020 |
| Tait Business Services Ltd | Information & communication | 2026 |
| TAN Envy Broadstone Limited | Other services | 2024 |
| TAS Qureshi LLP | | 2012 |
| Taylor House Projects Ltd | Construction | 2025 |
| TC Chichester Ltd | Other services | 2020 |
| TCG HQ Limited | Administrative & support | 2025 |
| Technical Tubes Ltd | Manufacturing | 2002 |
| Teddy's Pals Ltd | Other services | 2025 |
| Telger Holdings Ltd | Real estate | 2023 |
| Tennyson Interiors Ltd | Construction | 2016 |
| Tested UK Limited | Administrative & support | 2004 |
| Thamesmead Consultancy Services Limited | Financial services | 1997 |
| THE 29029 Ltd | Administrative & support | 2016 |
| THE Broadstone Cobbler Limited | Wholesale & retail | 2002 |
| THE Garden Nail Room Ltd | Other services | 2025 |
| THE Go-Ahead Investment Company Limited | Real estate | 2004 |
| THE Kraken Group Ltd | Construction | 2019 |
| THE Laurels Management Company (Broadstone) Limited | Households | 1998 |
| THE OCN Collective Ltd | Wholesale & retail | 2025 |
| THE Pantry Consultancy Ltd | Professional & scientific | 2017 |
| THE PAR TEE Lounge Ltd | Hospitality | 2024 |
| THE Pentagon (Poole) Ltd. | Construction | 2012 |
| THE Robins (Broadstone) Management Company Limited | Households | 2004 |
| THE Suitable Property Company Ltd | Real estate | 2017 |
| THE Tanning Factory Ltd | Other services | 2024 |
| THE Worm MAN Ltd | Agriculture & fishing | 2022 |
| Thedevrealm Limited | Information & communication | 2024 |
| Tiktrendzstore Limited | Wholesale & retail | 2025 |
| Timeline Arts Management Ltd | Wholesale & retail | 2019 |
| Titheradge Consulting Ltd | Information & communication | 2009 |
| TJH Metal Roofing Ltd | Construction | 2022 |
| TJI Retail Ltd | Wholesale & retail | 2025 |
| Tlcuk Ltd | Wholesale & retail | 2024 |
| TM Whitmore Consulting Ltd | Professional & scientific | 2009 |
| Toe-Tal Health Care Ltd | Health & social care | 2024 |
| TOM Hoops Studios Ltd | Arts & recreation | 2022 |
| Tradewinds Finance & Accounting Ltd | Professional & scientific | 2024 |
| Tradezapp Limited | Information & communication | 2015 |
| Trafalgar House Properties Ltd | Real estate | 2019 |
| Transparent Utilities Limited | Other services | 2025 |
| Trec Systems Limited | Construction | 2022 |
| Treecall Consulting Limited | Administrative & support | 2008 |
| True Balance Health Ltd | Health & social care | 2025 |
| True Mortgages and Protection Ltd | Financial services | 2025 |
| Tuckam Care Ltd | Public administration | 2020 |
| Tufton Property Ltd | Real estate | 2020 |
| Turbary Business Solutions Ltd | Professional & scientific | 2007 |
| Turbary Properties Ltd | Real estate | 2022 |
| TWENTY3 (Poole) Ltd | Real estate | 2023 |
| UK Tiles Direct (Holding) Limited | Financial services | 2026 |
| Unit 10 Financial Management Ltd | Professional & scientific | 2024 |
| Vagabond Pilates Clinical Ltd | Arts & recreation | 2026 |
| Valley of Stones Cheese Company Ltd | Wholesale & retail | 2024 |
| Valueu Limited | Professional & scientific | 2001 |
| Vanbourne Estates Limited | Construction | 2006 |
| Veloffee Lounge Ltd | Wholesale & retail | 2023 |
| Vescova Ltd | Administrative & support | 2017 |
| Vines Close Farm Shop Limited | Wholesale & retail | 2012 |
| Vintage Denim Edit Limited | Wholesale & retail | 2023 |