| Sports Stallion Direct Ltd | Administrative & support | 2017 |
| Sporty-Connect Limited | Arts & recreation | 2026 |
| Spot Holdings Limited | Other services | 2009 |
| Spotlight Solutions Limited | Information & communication | 2008 |
| Spreaders Limited | Wholesale & retail | 2005 |
| Spresian Healthcare Ltd | Health & social care | 2022 |
| Spring Accounting Ltd | Professional & scientific | 2013 |
| Spring Clean Commercial Ltd | Other services | 2014 |
| Spring Data Limited | Information & communication | 2020 |
| Spring Farm Systems Ltd | Agriculture & fishing | 2014 |
| Spring GRP Ltd | Transport & logistics | 2014 |
| Spring Gymnastics Ltd. | Other services | 2011 |
| Spring Meadow Childrens Home Ltd | Health & social care | 2019 |
| Springbeck Properties Limited | Real estate | 2016 |
| Springer Films Ltd | Information & communication | 2018 |
| Springtime Promotions Ltd | Arts & recreation | 2023 |
| Springwood Properties Holdings Ltd | Real estate | 2025 |
| Sprout Catering Limited | Wholesale & retail | 2025 |
| Sprowston Electrical Services Limited | Manufacturing | 2009 |
| Sprowston Food and Wine Ltd | Wholesale & retail | 2013 |
| Sprowston Hand Car Wash Ltd | Other services | 2022 |
| Sprowston Scaffolding Limited | Construction | 2008 |
| Sprowston Service Centre Limited | Wholesale & retail | 2014 |
| Sprowt Works Ltd | Information & communication | 2026 |
| SPS Global Solutions Limited | Information & communication | 2012 |
| Spurgeon and Sons Family Builders Limited | Construction | 2012 |
| Spydee Sports Ltd | Wholesale & retail | 2024 |
| Spypitch Ltd | Information & communication | 2026 |
| SQ Feet Properties Ltd | Real estate | 2023 |
| SQT Rail Signalling Ltd | Construction | 2019 |
| Squad Assist Limited | Information & communication | 2021 |
| Squad Stars Ltd | Manufacturing | 2025 |
| Square Deal Storage Limited | Administrative & support | 2017 |
| Square Internet Limited | Information & communication | 2017 |
| Square PEG Round Hole Finance Limited | Professional & scientific | 2017 |
| Square PEG Square Hole Recruitment & Training Limited | Administrative & support | 2007 |
| Squarecroft Limited | Real estate | 2019 |
| Squaregrapes Ltd | Wholesale & retail | 2020 |
| Squarehost Ltd | Administrative & support | 2010 |
| Squarepepper Ltd | Real estate | 2021 |
| Squeak-E-Clean Ltd | Professional & scientific | 2023 |
| Squeaky Clean (Norwich) Ltd. | Administrative & support | 2012 |
| Squeaky Clean Property Management Limited | Administrative & support | 2019 |
| Squeaky Cleaning Company Ltd | Extraterritorial | 2022 |
| Squeaky Gate Limited | Information & communication | 2026 |
| Squeeze Your Mind Limited | Information & communication | 2002 |
| Squiish Ltd | Wholesale & retail | 2020 |
| Squire Plant Ltd | Manufacturing | 2024 |
| Squire's Haven Limited | Households | 1988 |
| Squires Building and Refurbishment Ltd | Construction | 2018 |
| Squires Oak Property Services Limited | Real estate | 2011 |
| SR Capture Ltd | Information & communication | 2013 |
| SR Dennis Ltd | Professional & scientific | 2022 |
| SR Industries Limited | Wholesale & retail | 2024 |
| SR81 Ltd | Construction | 2020 |
| Sracs International Limited | Administrative & support | 2022 |
| Sracs Sports Limited | Wholesale & retail | 2025 |
| SRB Logistics Limited | Transport & logistics | 2015 |
| SRC Investments Anglia Limited | Real estate | 2022 |
| Srcj Ltd | Health & social care | 2022 |
| SRD South West Ltd | Construction | 2022 |
| Sreeji Ltd | Health & social care | 2024 |
| Sreemadhava Ltd | Health & social care | 2013 |
| Srfm Dealings Limited | Financial services | 2025 |
| Srh&Sons Ltd | Wholesale & retail | 2025 |
| SRI Ganapathi Lakshmi Balaji Ltd | Manufacturing | 2023 |
| SRI SOL Ltd | Information & communication | 2024 |
| Sriraanya Limited | Health & social care | 2025 |
| SRJ Slickline Services Limited | Other services | 2015 |
| SRK Fuel UK Ltd | Wholesale & retail | 2021 |
| SRK Infra Limited | Real estate | 2022 |
| SRM Home Physiotherapy Limited | Professional & scientific | 2025 |
| SRN Enterprises Limited | Financial services | 2017 |
| SRT Scaffolding Services Ltd | Construction | 2019 |
| SS Cars (East) Ltd | Wholesale & retail | 2023 |
| SS Global Consultant Limited | Administrative & support | 2025 |
| SS Property (East) Ltd | Real estate | 2024 |
| SS Solutions 4 YOU Ltd | Wholesale & retail | 2024 |
| SS Travel Cars Ltd | Transport & logistics | 2026 |
| SS1 Entertainments Limited | Arts & recreation | 2018 |
| Ssas IO Limited | Professional & scientific | 2015 |
| Ssbe Oliver Limited | Administrative & support | 2023 |
| SSC IT Solutions Ltd | Information & communication | 2023 |
| Ssge Home Improvements Limited | Extraterritorial | 1992 |
| Ssib Holding 2 Ltd | Real estate | 2017 |
| SSJ Construction Ltd | Real estate | 2018 |
| Ssjp Limited | Information & communication | 2019 |
| SSK Logistics Ltd | Transport & logistics | 2015 |
| Ssky Limited | Real estate | 2023 |
| Ssse Limited | Construction | 2010 |
| Sstarr Ltd | Health & social care | 2015 |
| SSY Group Limited | Professional & scientific | 2015 |
| ST Andrew's Park (Salhouse Road) Resident Management Company Limited | Households | 2022 |
| ST Andrews Court (7-15) Tenants Association Limited | Households | 2018 |
| ST Andrews Court Tenants Association Limited | Households | 2002 |
| ST Andrews Lettings & Management Ltd | Real estate | 2026 |
| ST Andrews Park Management Company Limited | Real estate | 1993 |
| ST Andrews Services Company Limited | Households | 1999 |
| ST Benedicts Limited | Financial services | 1994 |
| ST Claire Media Ltd | Information & communication | 2013 |