| Squareone Oswestry Limited | Hospitality | 2020 |
| Squirrel Technologies Limited | Information & communication | 2002 |
| ST Anne's Wharf (Norwich) Limited | Real estate | 2013 |
| ST Martins Service Station Limited | Manufacturing | 2003 |
| ST Mary's Court (Burryport) Management Company Limited | Administrative & support | 2015 |
| Starfish Labs Holdings Limited | Financial services | 2020 |
| State Wood Limited | Professional & scientific | 2023 |
| Steal This Circus CIC | Arts & recreation | 2023 |
| Steelroll Ltd | Extraterritorial | 2022 |
| Stef's Deli Limited | Wholesale & retail | 2026 |
| Stenwood Limited | Information & communication | 1995 |
| Stephen Morris (Master Chimney Sweep) Limited | Administrative & support | 2010 |
| Steve Michie Electrical Limited | Construction | 2016 |
| Steve Witt Consultancy & Design Ltd | Professional & scientific | 2019 |
| STEWARNER2326 Ltd | Construction | 2015 |
| Steway Services Ltd | Manufacturing | 2019 |
| Stokes of England Limited | Manufacturing | 2005 |
| Stone House Brewery Limited | Manufacturing | 2010 |
| Stone Street Homes Ltd | Construction | 2019 |
| Storevert Limited | Real estate | 2002 |
| Stormline Transport Ltd | Transport & logistics | 2026 |
| Stratos Travel Limited | Professional & scientific | 2001 |
| Stuart Gibson Associates Limited | Administrative & support | 2016 |
| Stuart Owen Plant Repairs Limited | Manufacturing | 2016 |
| Subport (Midlands) Ltd | Construction | 2023 |
| Substation Services Ltd | Energy | 2016 |
| Suckley Farms Ltd | Agriculture & fishing | 2018 |
| Sumons Cuisine Limited | Hospitality | 2024 |
| Suncity (Shoplatch) Limited | Other services | 2009 |
| Sunrock Properties Ltd | Real estate | 1999 |
| Supermash Limited | Information & communication | 2018 |
| Superstar Publishing Limited | Information & communication | 2017 |
| Sweeney Hall Hotel Limited | Extraterritorial | 2009 |
| Sweeney Management Ltd | Households | 2020 |
| Swift Automotive Limited | Wholesale & retail | 2021 |
| Swim With Style (2) Ltd | Arts & recreation | 2016 |
| SWJ Plumbing & Heating Ltd | Construction | 2022 |
| SWS Equipment Sales Limited | Wholesale & retail | 2024 |
| SWS Garage Equipment Limited | Manufacturing | 2009 |
| Sychnant Play Services Limited | Public administration | 2014 |
| T & S Wholesale Meats Limited | Wholesale & retail | 2025 |
| T M Hughes Limited | Wholesale & retail | 2016 |
| T Smith Electrical Limited | Construction | 2024 |
| T W Plant Sales Group Limited | Financial services | 2023 |
| T W Plant Sales Limited | Wholesale & retail | 2002 |
| T&T Beauty Limited | Other services | 2026 |
| T.R.C. Live Ltd | Arts & recreation | 2018 |
| T.R.C. Management Limited | Arts & recreation | 1998 |
| T.Whites Property and Garden Maintenance Ltd | Other services | 2023 |
| Tacer Developments Limited | Construction | 2015 |
| TAI Trawsfynydd Ltd | Wholesale & retail | 2020 |
| Taliesin 2019 Limited | Extraterritorial | 2019 |
| Tanat Consulting Limited | Professional & scientific | 2012 |
| Tanat Supplies Limited | Wholesale & retail | 2007 |
| Tanat Valley Eggs Limited | Agriculture & fishing | 1967 |
| Tanat Valley Light Railway Company Limited | Transport & logistics | 2003 |
| Tankguard Limited | Manufacturing | 2005 |
| Tarn Interim Solutions Limited | Professional & scientific | 2012 |
| Taylor Creatives Limited | Professional & scientific | 2004 |
| TD5 Reborn Ltd | Other services | 2021 |
| Techbox Solutions Ltd | Information & communication | 2008 |
| Techedge Retail Ltd | Wholesale & retail | 2023 |
| Techquine Limited | Information & communication | 2018 |
| Tedsmore Hall Limited | Real estate | 2007 |
| Tedsmore Lakes Limited | Extraterritorial | 2018 |
| Teiars Llangefni Tyres Ltd | Wholesale & retail | 2019 |
| TENNIS2YOU Limited | Arts & recreation | 2018 |
| Tesscott Limited | Agriculture & fishing | 2011 |
| Teya Ivanova Ltd | Transport & logistics | 2020 |
| THE Approved Windows and Door Limited | Construction | 2024 |
| THE Artisan Dried Flower Co Ltd | Wholesale & retail | 2013 |
| THE Botanical Farmer Ltd | Extraterritorial | 2014 |
| THE Bramblewood Group Ltd | Real estate | 2025 |
| THE Bric a Brac Shack Ltd | Wholesale & retail | 2019 |
| THE Bridge Coffee Company Limited | Hospitality | 2004 |
| THE Carriages Property Management Company Ltd | Real estate | 2010 |
| THE Concrete Specialists Limited | Construction | 2017 |
| THE Courtyard Venue Ltd | Real estate | 2024 |
| THE Curry Stall Ready Meals Limited | Manufacturing | 2016 |
| THE Day Centre Club (Oswestry) Limited | Health & social care | 2015 |
| THE Drama Forge CIC | Arts & recreation | 2024 |
| THE Dress - Bridal Boutique Ltd | Wholesale & retail | 2024 |
| THE Ever Tasty Food Ltd | Hospitality | 2025 |
| THE EVO Project Limited | Arts & recreation | 2025 |
| THE Falls at HI Style Salon Limited | Other services | 2023 |
| THE FAT Kind Ltd | Manufacturing | 2025 |
| THE Financial Information Experts LLP | | 2009 |
| THE Flooring Store Limited | Wholesale & retail | 2009 |
| THE Great British LOG Company Limited | Wholesale & retail | 2020 |
| THE Green Skip Company Ltd | Water & waste | 2008 |
| THE Hand Inn Limited | Hospitality | 2011 |
| THE Hollis Office Supply Company Ltd | Wholesale & retail | 1990 |
| THE Hot Cherry Club Ltd | Wholesale & retail | 2024 |
| THE Intrepid Community Group C.I.C. | Education | 2014 |
| THE King’S Head, Meifod Ltd | Hospitality | 2024 |
| THE Little Big Tree Company Limited | Extraterritorial | 2015 |
| THE Little Cleaning Company Ltd | Administrative & support | 2025 |
| THE Little Dairy Ltd | Agriculture & fishing | 2022 |
| THE Little Food Company Limited | Wholesale & retail | 1998 |
| THE LOG People Limited | Wholesale & retail | 2015 |