| Sw&P Ltd | Professional & scientific | 2015 |
| Sw&P Support Services LLP | | 2017 |
| SW2 Asset Management Limited | Financial services | 2011 |
| SWA Global Consultants Ltd | Professional & scientific | 2014 |
| Swaad Sadan Limited | Hospitality | 2025 |
| Swadeshi Limited | Wholesale & retail | 2024 |
| Swain Royd Investments Limited | Financial services | 2012 |
| Swale Educational Psychology Ltd | Education | 2025 |
| Swale Property Limited | Construction | 2022 |
| Swalk LLP | | 2011 |
| Swallow Force Ltd | Other services | 2017 |
| Swallow Hill Works RTM Company Limited | Households | 2023 |
| Swamal Limited | Information & communication | 2015 |
| Swan Group Holdings Limited | Financial services | 2025 |
| Swan Leigh Cosmetics Ltd | Wholesale & retail | 2018 |
| Swan Properties SPV Ltd | Real estate | 2026 |
| Swanky Pants (UK) Ltd | Wholesale & retail | 2013 |
| Swann Projects Ltd | Construction | 2025 |
| Swann Services (Legal) Limited | Professional & scientific | 2016 |
| Swann Services (Shore) Limited | Administrative & support | 2022 |
| Swansproperty Ltd | Households | 2025 |
| Swany Co Ltd | Wholesale & retail | 2019 |
| Swapchain Labs Ltd | Information & communication | 2024 |
| Swapnapoorti Technologies Ltd | Information & communication | 2010 |
| Swapsies Online Marketplace Ltd | Wholesale & retail | 2025 |
| Swara Music School Limited | Education | 2023 |
| Swarthwaite Limited | Health & social care | 2017 |
| Swat Properties Ltd | Real estate | 2021 |
| SWB Communal Areas Management Ltd | Households | 2022 |
| SWE Building Service Ltd | Construction | 2024 |
| Sweco Building Control Limited | Professional & scientific | 1994 |
| Sweco Consulting Engineers Limited | Other services | 1995 |
| Sweco Consulting Limited | Other services | 1997 |
| Sweco Services UK Limited | Professional & scientific | 1992 |
| Sweco UK Holding Limited | Construction | 1988 |
| Sweco UK Limited | Professional & scientific | 1994 |
| Sweden Property Invest Ltd | Real estate | 2018 |
| Swedex (UK) Limited | Manufacturing | 2003 |
| Sweet & Savoury Kitchen Ltd | Hospitality | 2025 |
| Sweet Brothers Events Limited | Arts & recreation | 2018 |
| Sweet Centre the Express Limited | Hospitality | 2019 |
| Sweet Hartt Ltd | Manufacturing | 2023 |
| Sweet Obsession Gelato Leeds Limited | Hospitality | 2021 |
| Sweet PEA & Willow London Limited | Wholesale & retail | 2006 |
| Sweet Peas at Rothwell Ltd | Education | 2025 |
| Sweet Peas Day Care & Teaching Nurseries Limited | Education | 2008 |
| Sweet Peas Holdings Limited | Financial services | 2004 |
| Sweet Quid Ltd | Transport & logistics | 2025 |
| Sweet Rolls Ltd | Wholesale & retail | 2025 |
| Sweet Saeeda Ltd. | Hospitality | 2015 |
| Sweet Shop Media Limited | Professional & scientific | 2016 |
| Sweet Sing Sing Wholesale Bakery Ltd | Hospitality | 2025 |
| Sweet SIP House Ltd | Hospitality | 2025 |
| Sweet Squared Limited | Wholesale & retail | 2006 |
| Sweet Street Leeds Ltd | Hospitality | 2025 |
| Sweet Tooth 1 Ltd | Health & social care | 2024 |
| Sweet Tooth Bakery Ltd | Hospitality | 2020 |
| Sweet Treats LS10 Ltd | Hospitality | 2026 |
| Sweetapollo Ltd | Professional & scientific | 2024 |
| Sweetheart Hosiery Limited | Wholesale & retail | 1991 |
| Sweetings Properties and Renovations Ltd | Real estate | 2021 |
| Sweetlife Leeds Ltd | Hospitality | 2021 |
| Sweetpea's Space Limited | Administrative & support | 2025 |
| Sweets Heaven Ltd | Wholesale & retail | 2025 |
| Sweetshackcandy Ltd | Wholesale & retail | 2024 |
| Sweetss Ltd | Hospitality | 2021 |
| Sweetvend Limited | Wholesale & retail | 2025 |
| Swegway-Pro Ltd | Wholesale & retail | 2017 |
| Swellendam Ltd | Information & communication | 2024 |
| Swerve Seats Limited | Manufacturing | 2021 |
| Swift (Heel & Key Bars) Limited | Other services | 1979 |
| Swift Adhesive Solutions Limited | Manufacturing | 2023 |
| Swift and Swift Limited | Administrative & support | 2021 |
| Swift Britng Solutions Ltd | Wholesale & retail | 2024 |
| Swift Brothers Leeds Ltd | Wholesale & retail | 2025 |
| Swift Building Supplies Ltd | Wholesale & retail | 2024 |
| Swift Dispatch Ltd | Transport & logistics | 2019 |
| Swift Gadget Limited | Wholesale & retail | 2015 |
| Swift Joinery Limited | Construction | 2004 |
| Swift LET Limited | Real estate | 2016 |
| Swift MRP Limited | Professional & scientific | 2019 |
| Swift Pixel Ltd | Professional & scientific | 2020 |
| Swift Ship Couriers UK Ltd | Transport & logistics | 2025 |
| Swift Support Services Ltd | Administrative & support | 2020 |
| Swiftacle UK Limited | Administrative & support | 2025 |
| Swiftbeach Ltd. | Administrative & support | 2015 |
| Swiftcartbuy Ltd | Wholesale & retail | 2026 |
| Swiftco Group Limited | Construction | 2021 |
| Swiftfactory Ltd | Information & communication | 2018 |
| Swiftfreelance Limited | Professional & scientific | 2024 |
| Swifthire Network Ltd | Administrative & support | 2026 |
| Swiftwhip Ltd | Wholesale & retail | 2022 |
| Swillington Autocare Limited | Wholesale & retail | 2007 |
| Swillington Hotel Ltd | Real estate | 2013 |
| Swillington Organic Farm Limited | Agriculture & fishing | 2001 |
| Swillington Park Trading Limited | Wholesale & retail | 2017 |
| Swillington Shooting Supplies Limited | Wholesale & retail | 2013 |
| Swillington Sports and Social Club Limited | Arts & recreation | 2011 |
| Swillington Trailer Centre Limited | Wholesale & retail | 2006 |
| Swillington Wild Swimming Ltd | Arts & recreation | 2026 |