| Support in Hand Home Support Services Ltd | Health & social care | 2017 |
| Support ME at Home Limited | Health & social care | 2013 |
| Support ME Legal Limited | Professional & scientific | 2025 |
| Supported Accomodation Providers Consultancy Ltd | Professional & scientific | 2026 |
| Supported Living Connect Ltd | Real estate | 2024 |
| Supportive Management Services Ltd | Education | 2018 |
| Supreme Bathroom & Kitchen Centre Ltd. | Wholesale & retail | 1998 |
| Supreme Developments Limited | Wholesale & retail | 2016 |
| Supreme Technologies Limited | Wholesale & retail | 2019 |
| Supremo Pizza (Willenhall) Limited | Wholesale & retail | 2019 |
| Sure Home Improvements Ltd | Construction | 2019 |
| Sure Roofs Systems Limited | Manufacturing | 1999 |
| Sure Travel (Norwich) Ltd | Transport & logistics | 2016 |
| Sureform Products Ltd | Manufacturing | 2016 |
| Surepass Solutions Limited | Education | 2014 |
| Surface Resin Bound Driveways Limited | Construction | 2017 |
| Surface Wraps Ltd | Administrative & support | 2024 |
| Surge Studios Ltd | Information & communication | 2024 |
| Surgery Solutions Ltd. | Professional & scientific | 2017 |
| Surplush Ltd | Hospitality | 2021 |
| Surrey Cooling Services Ltd | Construction | 2017 |
| Surrey Diagnostics Limited | Professional & scientific | 1999 |
| Surrey Removals Limited | Transport & logistics | 2025 |
| Surrey Sports & Classics Limited | Transport & logistics | 2013 |
| Surrey Street (Norwich) Management Limited | Households | 2004 |
| Surrey Street Property Services Ltd | Households | 2025 |
| Surrey-Uk Utilities Limited | Other services | 2019 |
| Surveil Digital Ltd | Information & communication | 2026 |
| Surveying & Geomatics Limited | Construction | 2006 |
| Surwood Construction Limited | Construction | 1996 |
| Surwood Groundwork Limited | Construction | 2020 |
| Susan CHO Limited | Health & social care | 2014 |
| Susan Walpole Limited | Extraterritorial | 2014 |
| Sushi 54 Limited | Hospitality | 2007 |
| Susl Realisations Limited | Manufacturing | 2009 |
| Sussex and Suffolk Engineering Management Ltd | Professional & scientific | 2018 |
| Sussex Second Nominees Limited | Extraterritorial | 2015 |
| Sussex Street Cohousing CIC | Construction | 2015 |
| Sustainable Food Norwich CIC | Professional & scientific | 2024 |
| Sustainable Living Initiative | Professional & scientific | 2005 |
| Sustainable Packaging News Ltd | Information & communication | 2020 |
| Sustained Innovation Limited | Information & communication | 2024 |
| Sutha & SON Property Ltd | Real estate | 2020 |
| Sutherland Homes Services Ltd | Construction | 2016 |
| Sutton Hall Escapes Ltd | Real estate | 2023 |
| Sutton Hall Retreat Ltd | Real estate | 2023 |
| Sutton Windmill Retreats Ltd | Real estate | 2021 |
| Suttp Productions Limited | Information & communication | 2024 |
| Suzuki Europe Limited | Wholesale & retail | 1987 |
| SV MK - T/A Salon Vibe Ltd | Other services | 2012 |
| SV Painting & Decorating Ltd | Construction | 2024 |
| Svajunas Pangonis Limited | Transport & logistics | 2025 |
| SVB Real Estate Ltd | Financial services | 2024 |
| SVC Financial Services Ltd | Financial services | 2021 |
| Sveinns Hamlet Ltd | Manufacturing | 2025 |
| Sviridov Medical Ltd | Health & social care | 2010 |
| SVK Capital Management Limited | Financial services | 2013 |
| SVP Pharma Ltd | Manufacturing | 2022 |
| Svtx Ltd | Construction | 2026 |
| Svzs Sweet Tooth Limited | Other services | 2018 |
| SW Alloys Ltd | Wholesale & retail | 2018 |
| SW Brundall Ltd | Real estate | 2021 |
| SW Bungay Ltd | Real estate | 2020 |
| SW Capital Holdings Ltd | Financial services | 2022 |
| SW Compliance and Consultancy Ltd | Professional & scientific | 2026 |
| SW Costessey Ltd | Real estate | 2020 |
| SW Diss Ltd | Real estate | 2021 |
| SW Poringland Ltd | Real estate | 2020 |
| SW Reporting Ltd | Other services | 2016 |
| SW Training Consultancy Ltd | Health & social care | 2019 |
| SW Wymondham Ltd | Real estate | 2020 |
| Swade Limited | Construction | 2010 |
| Swaffham Sporle Road Management Company Limited | Households | 2025 |
| Swaffield & LOW Services Limited | Professional & scientific | 2023 |
| Swag and Ballyhoo Limited | Arts & recreation | 2015 |
| Swagger & Jacks Education Ltd | Education | 2019 |
| Swagger & Jacks Gentlemens Grooming Limited | Wholesale & retail | 2013 |
| Swagger & Jacks Limited | Other services | 2013 |
| Swagger & Stitch Ltd | Wholesale & retail | 2010 |
| Swainsthorpe Filling Station Ltd | Wholesale & retail | 2026 |
| Swallow Financial Holdings Limited | Financial services | 2012 |
| Swallow Financial Investment Management Limited | Financial services | 2012 |
| Swallow Financial Planning LLP | | 2003 |
| Swallowdale Spa B & B Ltd | Real estate | 2018 |
| Swallowtail Consulting Ltd | Professional & scientific | 2022 |
| Swallowtail Health Consulting Limited | Professional & scientific | 2024 |
| Swallowtail Print Limited | Manufacturing | 2011 |
| Swallowtail Promotional Limited | Other services | 2017 |
| Swallowtails Ltd | Education | 2025 |
| Swan Engineering Service & Solutions Limited | Manufacturing | 2016 |
| Swan Property Norwich Ltd | Real estate | 2019 |
| Swan Saunders Limited | Professional & scientific | 2022 |
| Swan UK Limited | Real estate | 1994 |
| Swank Interiors Ltd | Professional & scientific | 2009 |
| Swannington Play Area Ltd | Arts & recreation | 2018 |
| Swans Motor Group Ltd | Wholesale & retail | 2012 |
| Swanton Morley Camping Limited | Hospitality | 2023 |
| Swarm and Fuzzy CIC | Education | 2026 |
| Swarm Bluewater Ltd | Professional & scientific | 2023 |
| Swarm Recruitment Ltd | Professional & scientific | 2019 |