| Shifting Paradigms Ltd | Professional & scientific | 2010 |
| Shike Prime Ltd | Hospitality | 2025 |
| Shillier Consulting Ltd | Professional & scientific | 2016 |
| Shimie Shine Cleaning Ltd | Administrative & support | 2019 |
| Shine MIDCO1 Limited | Financial services | 2022 |
| Shine on Window Cleaning Limited | Administrative & support | 2008 |
| Shine Topco Limited | Financial services | 2022 |
| Shine Xpress Ltd | Administrative & support | 2024 |
| Shineco Limited | Financial services | 2022 |
| Shinerustle Limited | Real estate | 1972 |
| Shinerwell Sporting Limited | Arts & recreation | 2025 |
| Shipton Investments Limited | Financial services | 2017 |
| Shira Steel Fixer Limited | Construction | 2021 |
| Shire Clocks Limited | Wholesale & retail | 2017 |
| Shirley Car Care Centre Ltd | Wholesale & retail | 2019 |
| Shirley Car Care Ltd. | Wholesale & retail | 2013 |
| Shirley Car Doctor Ltd | Wholesale & retail | 2024 |
| Shirley Fish Bar Ltd | Hospitality | 2026 |
| Shirley Fried Chicken Limited | Hospitality | 2024 |
| Shirley Grill House Limited | Hospitality | 2018 |
| Shirley Kebab House Ltd | Hospitality | 2024 |
| Shirley Nail Bar Ltd | Other services | 2026 |
| Shirley Quality Kabab Limited | Hospitality | 2025 |
| Shirley Road Properties Ltd | Real estate | 2019 |
| Shirley Saver Centre Limited | Wholesale & retail | 2011 |
| Shirley Swimming Pool Ltd | Arts & recreation | 2020 |
| Shirley Tech Ltd | Wholesale & retail | 2023 |
| Shirley Vape Shop Ltd | Wholesale & retail | 2024 |
| Shitha Pharma Limited | Health & social care | 2018 |
| Shiv Baba Limited | Wholesale & retail | 2010 |
| Shiva Tiffin Service Limited | Hospitality | 2026 |
| Shivay-Sub Limited | Hospitality | 2021 |
| Shivsat Enterprise Ltd | Information & communication | 2026 |
| SHJ Management Limited | Real estate | 2017 |
| Shkr Construction Ltd | Construction | 2026 |
| Shocklog Holdings Limited | Financial services | 2013 |
| Shocktube Ltd | Manufacturing | 2009 |
| Shoe Boutique Ltd | Wholesale & retail | 2017 |
| Shoe Religion Limited | Wholesale & retail | 2024 |
| Shoe Vouchers Limited | Administrative & support | 1983 |
| Shoestone Drake Limited | Hospitality | 2020 |
| Sholing FC Limited | Arts & recreation | 2025 |
| Sholing Vape Limited | Wholesale & retail | 2024 |
| Sholing Video Limited | Wholesale & retail | 2015 |
| Shoo 806AA Limited | Other services | 2017 |
| Shoots to Roots Complete Gardening Services Ltd | Administrative & support | 2021 |
| Shop Carbits Limited | Wholesale & retail | 2024 |
| Shop Design and Refit Limited | Construction | 2018 |
| Shop Fitting Solutions Limited | Construction | 2025 |
| Shopfitting Ltd | Manufacturing | 2019 |
| Shopmonkee UK Ltd. | Wholesale & retail | 2016 |
| Shore Cast Solent Limited | Manufacturing | 2006 |
| Shore PMS Limited | Professional & scientific | 2008 |
| Shore Property Holdings Limited | Real estate | 2018 |
| Shore Road (Residents Management) Limited | Households | 1973 |
| Shore Road Management (Warsash) Limited | Professional & scientific | 2002 |
| Shore Thing Marine Ltd | Professional & scientific | 2022 |
| Shorefix (I.O.W.) Ltd | Construction | 2012 |
| Shoreham Health Shop Ltd | Wholesale & retail | 2020 |
| Shoreland Home Improvements Limited | Construction | 2017 |
| Shoreland Plant Limited | Administrative & support | 1994 |
| Shoreland Projects Limited | Construction | 1996 |
| Shoreland Properties Limited | Construction | 2017 |
| Shorelane Consulting Ltd | Professional & scientific | 2022 |
| Shoreline Event Management Ltd | Professional & scientific | 2019 |
| Shoreside Roofing Limited | Construction | 2026 |
| Shorestone Construction Ltd | Construction | 2017 |
| Shoula Limited | Hospitality | 2024 |
| Shout 2020 Ltd | Financial services | 2018 |
| SHR Trading Ltd | Construction | 2025 |
| Shree Raghav Ltd | Wholesale & retail | 2021 |
| Shreeji PVT Ltd | Wholesale & retail | 2014 |
| Shreeji SUB Limited | Hospitality | 2021 |
| Shrk Ltd | Wholesale & retail | 2026 |
| SHS Hants Ltd | Construction | 2013 |
| SHS SEC 12 Services Limited | Health & social care | 2022 |
| Shuen Properties Limited | Construction | 2019 |
| Shumba Transports Limited | Transport & logistics | 2024 |
| Shumi Naan & Kebab Limited | Hospitality | 2024 |
| Shurville Publishing Ltd | Information & communication | 2014 |
| Shutter Force Limited | Construction | 2020 |
| Shuttles Engineering Ltd | Real estate | 2017 |
| Siam Landscapes Ltd | Administrative & support | 2019 |
| Siamocare Ltd | Health & social care | 2022 |
| Sian Campbell Trading AS Baby Classes Romsey Ltd | Other services | 2025 |
| Sian Campbell Trading AS Toddler Classes Romsey Ltd | Other services | 2025 |
| Sian Francis Painting and Decorating Limited | Construction | 2024 |
| Sibanye WE ARE One Community Interest Company | Other services | 2023 |
| Sibley's Yard Ltd | Transport & logistics | 2021 |
| Sibleys Eden Limited | Financial services | 2022 |
| Siby& Jiby Ltd | Administrative & support | 2017 |
| Sicon Farm Contractors Limited | Real estate | 1977 |
| SID Consult Ltd | Professional & scientific | 2025 |
| Sidbury Meadows Management Limited | Households | 2016 |
| Sidhu & Sons Haulage Limited | Transport & logistics | 2021 |
| Sienna Construction Limited | Construction | 2012 |
| Sienna Contractors Limited | Extraterritorial | 2014 |
| Sienna Investments (Hamble) Limited | Professional & scientific | 2025 |
| Sifisailing Ltd. | Arts & recreation | 2016 |
| Sigani Ltd | Wholesale & retail | 2023 |