| Ssjr Co 6 Limited | Construction | 2018 |
| Ssjr Co 8 Limited | Construction | 2019 |
| Ssjr Co 9 Limited | Construction | 2020 |
| Ssjr CO1 Limited | Real estate | 2017 |
| Ssjr CO2 Limited | Construction | 2018 |
| Ssjr Heliting House Limited | Construction | 2018 |
| Ssjr Limited | Professional & scientific | 2016 |
| Ssjr Property Limited | Financial services | 2020 |
| ST Giles Trustees Ltd | | 2023 |
| ST. Catherine's Lodge (Bournemouth) Management Limited | Households | 2003 |
| ST. Valentine Holdings Ltd | Real estate | 2025 |
| Stan Randell and Co. Limited | Construction | 1979 |
| Stanpit Builders Limited | Construction | 2002 |
| Stanpit Carpentry Ltd | Manufacturing | 2022 |
| Stanpit Court Management Limited | Households | 1980 |
| Stanpit Management Company Limited | Real estate | 2011 |
| Star SEL Limited | Information & communication | 2020 |
| Starline Roofing Ltd | Construction | 2025 |
| Statman Dave Limited | Information & communication | 2017 |
| Statman Dave Productions Ltd | Information & communication | 2018 |
| Staysmk Ltd | Real estate | 2025 |
| Steed Education Ltd | Administrative & support | 2020 |
| Steer Digital Ltd | Professional & scientific | 2010 |
| Stelpro Limited | Construction | 2025 |
| Stem Lane Properties Limited | Construction | 1976 |
| Stenport Computers Limited | Professional & scientific | 1995 |
| Step Tuition Ltd | Education | 2024 |
| Sterling Art Consultants Ltd | Professional & scientific | 2010 |
| Steve Ferris Kitchens Ltd | Wholesale & retail | 2017 |
| Steven Morton Felt Roofing Limited | Construction | 2014 |
| Steven Popper Educational Consultancy Services Limited | Education | 2013 |
| Stitch 2 Limited | Wholesale & retail | 2010 |
| Stitch 3 Limited | Wholesale & retail | 2010 |
| Stitch Bidco Limited | Wholesale & retail | 2009 |
| Stone 1 Limited | Construction | 2010 |
| Stonehaven Development & Construction Ltd | Construction | 2026 |
| Stour Chiropractic Clinic Ltd. | Health & social care | 2005 |
| Stour Developments Limited | Construction | 1963 |
| Straightline Cars Limited | Wholesale & retail | 2014 |
| Stratosguard Ltd | Information & communication | 2024 |
| Street Corner Limited | Hospitality | 2023 |
| Street Flavors Ltd | Hospitality | 2025 |
| Streetwise HR Limited | Administrative & support | 2014 |
| Strong Carpentry & Build Limited | Construction | 2011 |
| Structafit Ltd | Health & social care | 2024 |
| Stryder Financial Services Limited | Professional & scientific | 2025 |
| Studio Arkell Limited | Construction | 2020 |
| Studio Trevow Ltd | Professional & scientific | 2024 |
| Sublimation Limited | Administrative & support | 2025 |
| Sublime Developments Limited | Construction | 2006 |
| Sugg & Gutteridge Psychological Services Limited | Health & social care | 2012 |
| Suitable Candidates Ltd | Administrative & support | 2007 |
| Summer Breeze Freehold Management Company Limited | Households | 2016 |
| Summer-Energy Limited | Construction | 2025 |
| Sunshine Minutes Rewards Ltd | Administrative & support | 2015 |
| Super Trouper Ltd | Professional & scientific | 2025 |
| Superpet Limited | Wholesale & retail | 2017 |
| Suprafire Ltd | Health & social care | 2024 |
| Supraice Ltd | Health & social care | 2024 |
| Supregra Ltd | Manufacturing | 2022 |
| Surepro Carpentry & Joinery Ltd | Construction | 2020 |
| Susan Deal Limited | Real estate | 2002 |
| Susu Nails 77A Ltd | Other services | 2026 |
| Susu Nails Ltd | Other services | 2024 |
| Sutton Accountancy Solutions Ltd | Professional & scientific | 2012 |
| SVM Asset Limited | Real estate | 2025 |
| SVM Automotive Ltd | Wholesale & retail | 2023 |
| SVM Group Holdings Limited | Financial services | 2025 |
| SW Coastal Ltd | Real estate | 2026 |
| SW Partners in Property Ltd | Real estate | 2024 |
| Swan Heating Services Ltd | Construction | 2024 |
| Sweete Gifts Ltd | Wholesale & retail | 2023 |
| Swell Vans Limited | Manufacturing | 2009 |
| Swish ES Bournemouth LP | | 2025 |
| Swish New Milton LP | | 2025 |
| Swish Ringwood LP | | 2025 |
| Swish Shows Limited | Arts & recreation | 2013 |
| Swish Southbourne LP | | 2025 |
| Swish Theatre Schools Ltd | Arts & recreation | 2023 |
| Swiss Cladding Company Ltd | Construction | 2025 |
| Swnx Ltd | Wholesale & retail | 2025 |
| Swooper Services Ltd | Information & communication | 2025 |
| Sydant Limited | Wholesale & retail | 2013 |
| Sydnac Ltd | Wholesale & retail | 2019 |
| Sylver Entertainment Limited | Information & communication | 2019 |
| SYN RG Investments Ltd | Real estate | 2021 |
| Synergy Solutions Group Limited | Construction | 2023 |
| Syseng Solutions Ltd | Information & communication | 2018 |
| T & MC Ltd | Wholesale & retail | 2025 |
| T J Liberty Ltd | Construction | 2018 |
| T M B Systems Limited | Information & communication | 1989 |
| T. G. Operations Limited | Professional & scientific | 2011 |
| T.C. Stansmore Limited | Administrative & support | 2024 |
| Tailor Made Estate Agents Limited | Real estate | 2014 |
| Tailor Made Land & New Homes Ltd | Real estate | 2015 |
| Tailormint Ltd | Manufacturing | 2025 |
| TAK Holistic Limited | Health & social care | 2017 |
| TAL Arms Ltd | Arts & recreation | 1996 |
| TAL Scuba Limited | Arts & recreation | 2003 |
| Talent Connect SA Limited | Administrative & support | 2021 |