| Starbio International Ltd | Professional & scientific | 2021 |
| Starboard Lettings Ltd | Real estate | 2022 |
| Starborn Ltd | Information & communication | 2024 |
| Starfish Shipping Limited | Transport & logistics | 2023 |
| Stark Property Limited | Real estate | 2017 |
| Starlink International Culture and Media Co., Ltd. | Wholesale & retail | 2025 |
| Starone Labs Limited | Information & communication | 2024 |
| Starry Forest Ltd | Wholesale & retail | 2020 |
| Starry International Cultural Media Co., Ltd. | Wholesale & retail | 2025 |
| Starry Sea International Trade Co., Ltd. | Wholesale & retail | 2025 |
| Stars Aloft Co., Ltd | Wholesale & retail | 2025 |
| Stars Management Company Ltd | Real estate | 2015 |
| Stars Origin Co., Limited | Manufacturing | 2023 |
| Starsaip Ltd | Hospitality | 2025 |
| Start Codon (Nominee) Ltd | Financial services | 2019 |
| Start Codon Fund 1 LP | | 2019 |
| Start Codon General Partner Ltd | Financial services | 2019 |
| Start Codon Ltd | Financial services | 2018 |
| Start Home Evolutions Ltd | Hospitality | 2019 |
| Startle Ltd | Information & communication | 2013 |
| Starware Design Limited | Information & communication | 2014 |
| State Global Services Ltd | Manufacturing | 2025 |
| State of Design Limited | Professional & scientific | 1999 |
| Stately Investments Limited | Wholesale & retail | 2019 |
| Static Caravan Sales Ltd | Transport & logistics | 2006 |
| Staticvoid Ltd | Information & communication | 2024 |
| Station Garage Services Limited | Wholesale & retail | 2004 |
| Station Mews Histon Management Company Limited | Households | 2017 |
| Station Road Garage (Histon) Ltd | Wholesale & retail | 2013 |
| Station Road Garage (Impington) Ltd | Wholesale & retail | 2019 |
| Station Road Impington Management Company Limited | Households | 2018 |
| Station Street (Amenity) Limited | Households | 2005 |
| Statsxperts Consulting Limited | Information & communication | 2017 |
| Stavichka Services Ltd | Professional & scientific | 2024 |
| Staylight Ltd | Professional & scientific | 2020 |
| Stayme Ltd | Real estate | 2024 |
| Stazione (UK) Ltd | Hospitality | 2014 |
| Steadfast Living Ltd | Real estate | 2026 |
| Steak & Honour Limited | Hospitality | 2021 |
| Stedix Global Limited | Financial services | 2025 |
| Steed Business Services Limited | Professional & scientific | 2014 |
| Steed Consulting Limited | Professional & scientific | 2007 |
| Steed Investments Limited | Real estate | 2025 |
| Steel Securities Limited | Financial services | 2024 |
| Steele O'Brien Consulting Limited | Information & communication | 2015 |
| Steelink Ltd | Manufacturing | 2025 |
| Steen Holdings UK Limited | Wholesale & retail | 2023 |
| Stefan's Building Ltd | Construction | 2021 |
| Stefania SRL Ltd | Manufacturing | 2025 |
| Stefano Manca Limited | Education | 2017 |
| Stela Express Co., Ltd | Extraterritorial | 2022 |
| Stellar HMO Ltd | Real estate | 2025 |
| Stellar Taxi Ltd | Transport & logistics | 2024 |
| Stellare Trade Ltd | Wholesale & retail | 2025 |
| Stemark Buildings Ltd | Construction | 2022 |
| Stemark Trading Limited | Wholesale & retail | 2024 |
| Stembio Finance Limited | Financial services | 2026 |
| Stembond Technologies Ltd | Professional & scientific | 2021 |
| Stemcell Technologies UK Ltd | Professional & scientific | 2014 |
| Stemma Land & New Homes (Cherry Hinton RD) LLP | | 2026 |
| Stemma Land & New Homes (Milton RD) LLP | | 2023 |
| Stemma Land & New Homes (Woodditton Three) LLP | | 2024 |
| Stemma Land & New Homes (Woodditton Two) LLP | | 2024 |
| Stemnovate Limited | Professional & scientific | 2016 |
| Stephen Clifton Limited | Construction | 2019 |
| Stephen Davies Surveyors Ltd | Professional & scientific | 2013 |
| Stephen Devoy & Associates Ltd | Real estate | 2018 |
| Stephen Drake Valuations Ltd | Professional & scientific | 2023 |
| Stephen George Associates Ltd | Professional & scientific | 2013 |
| Stephen Hawking Limited | Professional & scientific | 2015 |
| Stephen Lunn Associates Ltd | Professional & scientific | 2005 |
| Stephen Roberts Limited | Professional & scientific | 2024 |
| Stephen Unger Consulting Ltd | Professional & scientific | 2018 |
| Steplow Ltd | Extraterritorial | 2022 |
| Stepney Insulation Limited | Construction | 1996 |
| Steppe Cavalry Limited | Wholesale & retail | 2024 |
| Stepson Ltd | Manufacturing | 2025 |
| Sterling Events Hire Ltd | Wholesale & retail | 2020 |
| Sterling Extensive Services Limited | Other services | 2018 |
| Sterling Wise Investment Limited | Real estate | 2019 |
| Steve C O Mayor Limited | Wholesale & retail | 2007 |
| Steve Giles Flooring Ltd | Construction | 2002 |
| Steve Guppy Ltd | Real estate | 2000 |
| Steve Hodgson Building Consulting Ltd | Professional & scientific | 2023 |
| Steve Southern Ltd | Transport & logistics | 2019 |
| Steven Arapi Forex Ltd | Financial services | 2024 |
| Steven Blackford Composites Ltd | Manufacturing | 2021 |
| Steven Laine Engineering and Simulation Ltd | Professional & scientific | 2024 |
| Stevenage Northern Gateway Ltd | Construction | 2020 |
| Stevens Storage Limited | Real estate | 2003 |
| Stevenson's Legacy Company Limited | Real estate | 2014 |
| Stickleman Ltd | Information & communication | 1993 |
| Stickwork Limited | Other services | 2014 |
| Stiff’S Aviation Ltd | Manufacturing | 2025 |
| Still Green C.I.C. | Other services | 2014 |
| Still Water Runs Free Ltd | Professional & scientific | 2025 |
| Stillness Road Limited | Professional & scientific | 2017 |
| Stillvision Photography Ltd. | Arts & recreation | 2009 |
| Stingray BIO Limited | Professional & scientific | 2020 |
| Stirling Rose Limited | Households | 2026 |