| Seven Group Property Limited | Real estate | 2010 |
| Seven Life Sciences Limited | Administrative & support | 2017 |
| Seven Limited | Extraterritorial | 1986 |
| Seven Logistics Limited | Transport & logistics | 2004 |
| Seven One (Investments) Limited | Administrative & support | 2016 |
| Seven Project Limited | Construction | 1995 |
| Seven Property Associates Limited | Extraterritorial | 2011 |
| Seven Property Limited | Real estate | 1991 |
| Seven Refrigeration Limited | Extraterritorial | 2009 |
| Seven Resourcing Limited | Administrative & support | 2011 |
| Seven Stars Convenience Store Ltd | Wholesale & retail | 2024 |
| Seven Supercharged Limited | Professional & scientific | 2020 |
| Seven Zero Design Architects Ltd | Professional & scientific | 2011 |
| Seven Zero Design Limited | Construction | 2009 |
| Sevenoak Investigations Limited | Administrative & support | 2014 |
| Seventh Day Edge Ltd | Transport & logistics | 2017 |
| Seventy Nine Training Ltd | Education | 2021 |
| Seventy Seven Media Limited | Arts & recreation | 2025 |
| Severn Road Development Ltd | Construction | 2025 |
| Severn Strategy (Technology) Limited | Information & communication | 2026 |
| SEW Bespoke Limited | Construction | 2009 |
| Sewprocrafts Ltd. | Wholesale & retail | 2017 |
| SF Print Services Limited | Manufacturing | 2019 |
| SFB Consultancy & Auditing Ltd | Transport & logistics | 2024 |
| Sfhs Publications Limited | Wholesale & retail | 2004 |
| SFS DIS Ticaret AS Limited | Wholesale & retail | 2026 |
| SG Engineering Ipswich Ltd | Manufacturing | 2008 |
| SG Property Ventures Ltd | Real estate | 2024 |
| Sgg-Transport Ltd | Transport & logistics | 2018 |
| SGJ Properties Limited | Real estate | 2001 |
| SGR 2016 Limited | Financial services | 2016 |
| SH Hockey Limited | Arts & recreation | 2025 |
| SH Square Consultants Ltd | Administrative & support | 2017 |
| Sh&Cl Limited | Other services | 2017 |
| SHA Convenience Store Ltd | Wholesale & retail | 2024 |
| Shabby Chic Personalised Limited | Administrative & support | 2010 |
| Shabir Consultants Limited | Administrative & support | 2019 |
| Shadi Ipswich Ltd | Health & social care | 2012 |
| Shadow Nova Limited | Information & communication | 2024 |
| Shagan Developments Limited | Real estate | 2021 |
| Shaharukh Ltd | Wholesale & retail | 2025 |
| Shahin Properties Ltd | Real estate | 2021 |
| Shahzaib Traders Limited | Administrative & support | 2023 |
| Shakamobile Ltd | Information & communication | 2021 |
| Shalf Limited | Construction | 2007 |
| Shalom Retail Ltd | Wholesale & retail | 2026 |
| Shambles Ensemble Ltd | Arts & recreation | 2026 |
| Shanice Paris Interiors Limited | Professional & scientific | 2021 |
| Shannia Care Services Ltd | Health & social care | 2014 |
| Shap Professional Cleaners Ltd | Administrative & support | 2025 |
| Shapethread Ltd | Information & communication | 2025 |
| Shapla Suffolk Ltd | Hospitality | 2022 |
| Shared Ambition Consulting Limited | Administrative & support | 2025 |
| Sharman Caravans Limited | Administrative & support | 1982 |
| Sharon Bird Ltd | Other services | 2018 |
| Sharon Louise Beauty and Tanning Ltd | Other services | 2016 |
| Sharp Architects Ltd | Professional & scientific | 2024 |
| Sharp Mountain Ltd | Wholesale & retail | 2025 |
| Sharps Acoustics LLP | | 2008 |
| Shaun Everett Interior Design & Decorating Ltd | Construction | 2024 |
| Shawarma Bistro Ipswich Ltd | Hospitality | 2019 |
| Shawarma City Ipswich Ltd | Hospitality | 2025 |
| Shawcan Ltd | Professional & scientific | 2016 |
| Shayne Abbott Limited | Other services | 2003 |
| SHD Recruitment Limited | Administrative & support | 2023 |
| Sheela Consultancy Services Ltd | Professional & scientific | 2024 |
| Sheela Mackintosh-Stewart Ltd | Professional & scientific | 2024 |
| Sheelauk Ltd | Professional & scientific | 2024 |
| Shehbaz Eagle Limited | Wholesale & retail | 2026 |
| Sheldrake Hills Limited | Information & communication | 2023 |
| Sheldrake Pressure Washing Limited | Construction | 2022 |
| Shelfanger Take Away Ltd | Hospitality | 2019 |
| Shell & MAE Ltd | Administrative & support | 2025 |
| Shelton Projects Ltd | Information & communication | 1996 |
| Shereen Daniels Ltd | Arts & recreation | 2021 |
| Sherene & Co Ltd | Wholesale & retail | 2018 |
| Sheri Private Limited | Hospitality | 2024 |
| Sherlock Consulting Limited | Information & communication | 1997 |
| Sherwana Store Ltd | Wholesale & retail | 2025 |
| Shetland Stays Ltd | Real estate | 2023 |
| Shield Render Systems Limited | Construction | 2017 |
| Shield Shipping Limited | Transport & logistics | 1980 |
| Shiftops Consulting Ltd | Information & communication | 2019 |
| Shika Shack Ltd | Hospitality | 2018 |
| Shillco Advisory Ltd | Professional & scientific | 2025 |
| Shills Creative Media Ltd | Information & communication | 2025 |
| Shine Solutions Limited | Administrative & support | 2024 |
| Shine&Sustain Ltd | Construction | 2026 |
| Shinedale Limited | Wholesale & retail | 1980 |
| Shinepro 360 Limited | Administrative & support | 2025 |
| Shining Diva Cleaning Company Ltd | Administrative & support | 2018 |
| Shining Moon Coaching and Consultancy Ltd | Professional & scientific | 2018 |
| Shinpark Limited | Administrative & support | 1998 |
| Shinpress Limited | Professional & scientific | 1998 |
| Shiny Cleaning FLO Ltd | Administrative & support | 2025 |
| Shipcargo Ltd | Transport & logistics | 2026 |
| Shipp Shape Limited | Manufacturing | 2009 |
| Shipping Container Consultants Ltd | Administrative & support | 2016 |
| Shipyard Supply Co Limited | Wholesale & retail | 2018 |
| Shire Homes (Anglia) Limited | Construction | 1988 |