| Stepping Stones Day Nurseries Limited | Health & social care | 2026 |
| Stepway Developments Limited | Construction | 2014 |
| Sterizen Limited | Wholesale & retail | 2021 |
| Sterling Fine Wines Ltd | Wholesale & retail | 2016 |
| Sterling Plumbing & Heating Limited | Construction | 2019 |
| Sterling's Hospitality Limited | Hospitality | 2025 |
| Sterners Yard Ltd | Wholesale & retail | 2019 |
| Steve & Catherine Properties Limited | Real estate | 2016 |
| Steve Ball Properties Ltd | Real estate | 2017 |
| Steve Collins Construction Management Limited | Construction | 2015 |
| Steve Ellis Kitchens Limited | Construction | 2023 |
| Steve Finance Corp. | Extraterritorial | 2025 |
| Steve Foster Limited | Arts & recreation | 2017 |
| Steve Garten Builders Ltd | Administrative & support | 2010 |
| Steve Horton Limited | Real estate | 2015 |
| Steve Kelly Media Ltd | Other services | 2017 |
| Steve PYE & Co (KL) Limited | Professional & scientific | 2013 |
| Steve Pymm Holdings Limited | Financial services | 2024 |
| Steve Stock Limited | Public administration | 2024 |
| Steve White Home Improvements Ltd | Construction | 2007 |
| Steve WW Limited | Professional & scientific | 2017 |
| Steve's P.A. Hire Ltd | Administrative & support | 2013 |
| Steven Carnaby Associates Limited | Health & social care | 2016 |
| Steven Cutts Production Ltd | Information & communication | 2013 |
| Steven Gigli Tattooist Ltd | Arts & recreation | 2025 |
| Stevenson & Key (Frames) Limited | Manufacturing | 2019 |
| Stevenson Investments Limited | Financial services | 2023 |
| Stevensons of Norwich Limited | Manufacturing | 2004 |
| Stevenswood Trade Counters Limited | Construction | 2024 |
| Stewart's Home and Garden Maintenance Service Ltd | Construction | 2024 |
| Stibbons GAS Limited | Professional & scientific | 2015 |
| Sticky Words Ltd | Administrative & support | 2014 |
| Stickyclicks International Limited | Information & communication | 2019 |
| Still Talking Limited | Arts & recreation | 2025 |
| Stillwaters (Bowthorpe) Management Company Limited | Households | 2004 |
| Stimpson (Heating Engineers) Limited | Construction | 1975 |
| Stirling & Co Design Realisation Limited | Professional & scientific | 2012 |
| Stirling Brown Ltd | Wholesale & retail | 2019 |
| Stirling Holidays Limited | Real estate | 1960 |
| STN Trading Ltd | Hospitality | 2015 |
| Stobart & Hurren Limited | Real estate | 2024 |
| Stock Central Limited | Wholesale & retail | 2025 |
| Stockford Consultancy Services Ltd | Professional & scientific | 2018 |
| Stockmate Limited | Information & communication | 2024 |
| Stockwell Lettings Ltd | Real estate | 2025 |
| Stoke Fish and Chips Ltd | Hospitality | 2024 |
| Stoke Mill Limited | Hospitality | 1969 |
| Stoke Mill Restaurant Ltd | Hospitality | 2013 |
| Stoke Newington Literary Festival C.I.C. | Arts & recreation | 2012 |
| Stoke Restaurants Ltd | Hospitality | 2025 |
| Stolady Medical Services Ltd | Health & social care | 2022 |
| Stonecold Construction Limited | Construction | 2023 |
| Stoneleigh Dental Practice Limited | Health & social care | 2013 |
| Stoneoak Construction (Kent) Limited | Construction | 2017 |
| Stones Media Potters Bar Limited | Manufacturing | 2018 |
| Stopside Limited | Wholesale & retail | 2003 |
| Store Galore (Barn OWL) Ltd | Transport & logistics | 2021 |
| Store Galore (Barnham Broom) Ltd | Transport & logistics | 2020 |
| Store Galore (Catfield) Ltd | Transport & logistics | 2020 |
| Store Galore (Celia) Ltd | Transport & logistics | 2022 |
| Store Galore (Darcey) Ltd | Transport & logistics | 2023 |
| Store Galore (Gresham) Ltd | Transport & logistics | 2021 |
| Store Galore (Paul) Ltd | Transport & logistics | 2023 |
| Store Galore (Romney) Ltd | Transport & logistics | 2023 |
| Store Galore (Rush Green) Ltd | Transport & logistics | 2021 |
| Store Galore (Wymondham) Ltd | Transport & logistics | 2020 |
| Store-Easily 247 Limited | Extraterritorial | 2012 |
| Storey Developments (East Anglia) Ltd | Construction | 2024 |
| Storey Sisters Limited | Professional & scientific | 2025 |
| Storey Storage Limited | Transport & logistics | 2020 |
| Storm Digital Solutions Limited | Professional & scientific | 2023 |
| Storm Lantern Limited | Professional & scientific | 2007 |
| Storm PAY Limited | Information & communication | 2018 |
| Stormfolio Ltd | Information & communication | 2018 |
| Story Machine Ltd | Information & communication | 2024 |
| Stour View (Brantham) Management Company Limited | Households | 2021 |
| Stove Solutions Limited | Administrative & support | 2008 |
| Stow Park Farm Ltd | Agriculture & fishing | 1985 |
| Stowmarket Fuels Limited | Professional & scientific | 2007 |
| STP Properties and Leisure Ltd | Hospitality | 2017 |
| STR Service Centre Ltd | Wholesale & retail | 2011 |
| Stracey Motors Limited | Wholesale & retail | 2024 |
| Stradbroke (ASH Plough) Management Company Limited | Households | 2005 |
| Stradbroke Garage Redefined Ltd | Construction | 2024 |
| Straightforward Consulting Limited | Professional & scientific | 2026 |
| Straightforward Innovative Software Solutions Ltd | Information & communication | 2016 |
| Straightline Express Limited | Transport & logistics | 2009 |
| Strand (Eccles) Management Company Limited | Real estate | 2025 |
| Strand Brickwork Limited | Construction | 2024 |
| Strand Development Limited | Construction | 2017 |
| Strand Group (Norfolk) Limited | Financial services | 2023 |
| Strand Homes (Norfolk) Limited | Construction | 2024 |
| Strand Properties (Eccles) Limited | Construction | 2024 |
| Strand Properties (Ellingham) Limited | Construction | 2023 |
| Strand Properties (Framingham) Limited | Construction | 2024 |
| Strand Properties (GT Bircham) Limited | Construction | 2025 |
| Strand Properties (Kelling) Limited | Construction | 2025 |
| Strand Properties (Norfolk) Limited | Real estate | 2023 |
| Strand Properties (Redgrave) Limited | Construction | 2024 |
| Strand Properties (Weston Hall) Limited | Construction | 2025 |