| Shoots Training Limited | Education | 2003 |
| Shore Aesthetics Ltd | Health & social care | 2024 |
| Shore Catering Ltd | Hospitality | 2025 |
| Shore Connections Ltd | Manufacturing | 2023 |
| Shore Construction Limited | Extraterritorial | 2015 |
| Shore Electrical Contractors Limited | Construction | 2008 |
| Shore Electrical Limited | Construction | 2011 |
| Shore Fabrications Ltd | Manufacturing | 2026 |
| Shore Footings Ltd | Real estate | 2021 |
| Shore Holdings Limited | Real estate | 2019 |
| Shore Lettings Limited | Real estate | 2014 |
| Shore Medicines Limited | Health & social care | 2022 |
| Shore Pilates Studios Ltd | Arts & recreation | 2023 |
| Shore Point Brownsea Ltd | Households | 2009 |
| Shore Renewables Limited | Construction | 2011 |
| Shore Services Limited | Construction | 2026 |
| Shore Solar Limited | Construction | 2011 |
| Shore Thing Ltd | Other services | 1998 |
| Shorecrest Management Limited | Households | 2020 |
| Shoreline Properties Limited | Real estate | 2001 |
| Shoresports Limited | Administrative & support | 2019 |
| Short Stay Lets Ltd | Hospitality | 2015 |
| SHR Management Ltd | Construction | 2015 |
| Shrekfeet Limited | Households | 2018 |
| Shri Aalam Limited | Wholesale & retail | 2025 |
| Shrimpton & Associates Limited | Professional & scientific | 2006 |
| Shrinkwrap Machinery Co.Limited | Manufacturing | 1967 |
| Shukla Estates Limited | Construction | 2018 |
| Shultz Company Ltd | Wholesale & retail | 2022 |
| Shut IT Down Ltd | Education | 2025 |
| Shutters of Distinction Limited | Construction | 2011 |
| SI Test Limited | Professional & scientific | 1986 |
| SI Test Systems Ltd | Professional & scientific | 2006 |
| Siam Spice Limited | Hospitality | 2025 |
| Sibley-Ware Property Limited | Real estate | 2025 |
| Sibo Jingsil Real Estate Ltd | Real estate | 2024 |
| Sidehurst Limited | Professional & scientific | 1983 |
| Sidsulmem Property Limited | Real estate | 2026 |
| Siennarlo Ltd | Real estate | 2025 |
| Sigil Vault Limited | Information & communication | 2025 |
| Sign Envy Limited | Other services | 2019 |
| Signex UK Limited | Manufacturing | 2003 |
| Signitek Ltd | Wholesale & retail | 2023 |
| Sigra Projects Limited | Construction | 2022 |
| Sikhra Holdings Limited | Real estate | 2024 |
| Silent Earth Limited | Professional & scientific | 2014 |
| Silent Vision Solutions Ltd | Professional & scientific | 2008 |
| Silesianna Diagnostics Ltd | Health & social care | 2025 |
| Silicon South Dorset | Administrative & support | 2013 |
| Silkline Ltd | Wholesale & retail | 2019 |
| Sill Holdings Ltd | Financial services | 2026 |
| Sill Trading Ltd | Professional & scientific | 2026 |
| Sillette Sonic Limited | Wholesale & retail | 2016 |
| Silm Coaching Psychology Ltd | Extraterritorial | 2021 |
| Silm Limited | Real estate | 1988 |
| Silva Rent Solutions Ltd | Real estate | 2026 |
| Silver Birch Curtains Limited | Manufacturing | 2021 |
| Silver C Limited | Real estate | 2015 |
| Silver Car Sales Limited | Wholesale & retail | 2003 |
| Silver Lady Services Limited | Wholesale & retail | 1994 |
| Silver Lining Consulting Limited | Extraterritorial | 2012 |
| Silver Lining Ventures Limited | Administrative & support | 2018 |
| Silver Oak Accounting Limited | Professional & scientific | 2018 |
| Silver Ornate Limited | Wholesale & retail | 2025 |
| Silver Sand Glazing Ltd | Construction | 2018 |
| Silver Sword Investments Ltd | Financial services | 2015 |
| Silver Trees Flat Management Company Limited | Administrative & support | 2003 |
| Silverback Alehouse Ltd | Hospitality | 2022 |
| Silverblue Ltd | Professional & scientific | 2017 |
| Silverstead Homecare Ltd | Administrative & support | 2025 |
| Silverstrand RTM Limited | Households | 2007 |
| Silverwood Opportunities Ltd | Agriculture & fishing | 2023 |
| Sim-Uk Ltd | Professional & scientific | 2026 |
| Sima Property Management Ltd | Real estate | 2025 |
| Sima Retailing Ltd | Wholesale & retail | 2019 |
| Simani Ltd | Health & social care | 2019 |
| Simo Services Limited | Transport & logistics | 2020 |
| Simon Davies Sound Limited | Information & communication | 2012 |
| Simon Lockyer Limited | Information & communication | 2002 |
| Simon Peckham Technical Services Ltd | Professional & scientific | 2016 |
| Simon Scarborough Associates Limited | Administrative & support | 2013 |
| Simpaly Ltd | Professional & scientific | 2025 |
| Simpancorp Ltd | Information & communication | 2018 |
| Simple Bytes Limited | Professional & scientific | 2024 |
| Simple Life Security Ltd | Financial services | 2021 |
| Simple Marketing Agency Limited | Professional & scientific | 2024 |
| Simple Probate Limited | Professional & scientific | 2018 |
| Simple Property Management Solutions Ltd | Households | 2020 |
| Simplepieces Group Ltd | Information & communication | 2022 |
| Simplifyed Ltd | Real estate | 2026 |
| Simply Amazing Group Ltd | Financial services | 2022 |
| Simply Amazing Training Limited | Professional & scientific | 2007 |
| Simply Cleaned (290) Ltd | Other services | 2025 |
| Simply Cleaned (43) Ltd | Extraterritorial | 2024 |
| Simply Cleaned Group Ltd | Financial services | 2025 |
| Simply Cleaned Ltd | Administrative & support | 2023 |
| Simply Crypto Hub Ltd | Information & communication | 1996 |
| Simply Flower Ltd | Arts & recreation | 2008 |
| Simply Unique Limited | Wholesale & retail | 2017 |
| Simplydoorsuk Ltd | Construction | 2025 |