| Struckman & Sister Limited | Professional & scientific | 2026 |
| Studio Lunet Ltd | Professional & scientific | 2022 |
| Studiocanoe Ltd | Information & communication | 2017 |
| Stukins OIL Specialists Ltd | Construction | 2025 |
| Substantia Intelligence Group (SIG) Ltd | Professional & scientific | 2025 |
| Subway Nine Ltd | Manufacturing | 2009 |
| Sumfin Ltd | Information & communication | 2023 |
| Summer Lily Ltd | Professional & scientific | 2019 |
| Summerhill Farm Shop Limited | Wholesale & retail | 2007 |
| Sunrise Boarding Kennels Ltd | Other services | 2024 |
| Sunshine Equipment Ltd | Administrative & support | 2018 |
| Suntrap Limited | Information & communication | 2018 |
| Super Satellite MAN Limited | Extraterritorial | 2015 |
| Support Partners (UK) Ltd | Information & communication | 2004 |
| Surfin Cafe Limited | Hospitality | 2013 |
| Survey Hire UK Limited | Construction | 2017 |
| Sutton Farms Bedfordshire LLP | | 2006 |
| Sutton Farms Ltd | Agriculture & fishing | 2007 |
| Sutton Properties Limited | Construction | 1995 |
| Suzanne Chetty Film Ltd | Information & communication | 2023 |
| SVK Enterprise Ltd | Hospitality | 2023 |
| Swallow Site Services Ltd. | Construction | 2001 |
| Swanky Socks Limited | Wholesale & retail | 2023 |
| Sweet Peach Wellbeing Limited | Health & social care | 2022 |
| Swift Workers Ltd | Administrative & support | 2024 |
| Swimsuite Ltd | Information & communication | 2026 |
| Swipe Voyage Ltd | Administrative & support | 2026 |
| Synergia Construction Ltd | Extraterritorial | 2022 |
| Synergia Consulting Ltd | Construction | 2022 |
| Synergia Group Ltd | Construction | 2022 |
| Synergia Projects Ltd | Construction | 2021 |
| Synergy Controls Limited | Construction | 2007 |
| Synergy Propco Limited | Real estate | 2022 |
| Systemic Perspectives Ltd | Education | 2025 |
| T & R Roofing Ltd. | Administrative & support | 2006 |
| T Diep Studio Ltd | Professional & scientific | 2022 |
| T J Electrical (Beds) Ltd | Construction | 2019 |
| T&A Simplicity Limited | Information & communication | 2012 |
| T&L Bespoke Building Ltd | Construction | 2024 |
| T&M Electrical Solutions Ltd | Construction | 2022 |
| T&S Design Solutions Limited | Professional & scientific | 2022 |
| T&T Mobile Shine Ltd | Administrative & support | 2026 |
| T.A.Tunnard Limited | Agriculture & fishing | 1942 |
| Tamity Ltd | Information & communication | 2013 |
| Tammy Nails Ltd | Other services | 2024 |
| Taped Studio Ltd | Information & communication | 2024 |
| Taurus Asset Holdings Ltd | Hospitality | 2025 |
| TAY Associates Limited | Administrative & support | 1998 |
| TB CAD Services Limited | Construction | 2016 |
| Teal-O Limited | Information & communication | 2017 |
| Tealplace Properties Ltd | Real estate | 2025 |
| Team Dickerson Racing Limited | Arts & recreation | 2017 |
| Team Hamster Racing Ltd | Arts & recreation | 2021 |
| Tech Electrical Ltd | Construction | 2023 |
| Techcite Ltd | Other services | 2020 |
| Techlify Limited | Information & communication | 2022 |
| Techsync Ltd | Wholesale & retail | 2020 |
| Telkyn Solutions Limited | Information & communication | 2016 |
| Templar Digital Limited | Information & communication | 2020 |
| Temple Power Services Ltd | Energy | 2022 |
| Templeton Land Ltd | Real estate | 2022 |
| Tenebres Clothing Ltd | Wholesale & retail | 2025 |
| Tensor AI Ltd | Information & communication | 2026 |
| Terrenzo.Aesthetics Ltd | Extraterritorial | 2024 |
| TG Systems (UK) Limited | Manufacturing | 1993 |
| TH Driving Services Ltd | Transport & logistics | 2019 |
| Thai Cuisine BW Ltd | Hospitality | 2026 |
| Thai Rice Biggleswade Limited | Hospitality | 2024 |
| Thai Rice Express Ltd | Hospitality | 2025 |
| Tharwah Ltd | Wholesale & retail | 2022 |
| THE Allium Alliance Limited | Wholesale & retail | 2001 |
| THE Alternative Day Services Limited | Health & social care | 2011 |
| THE Artful Corporation Limited | Arts & recreation | 1996 |
| THE BBQ Centre Ltd | Wholesale & retail | 2003 |
| THE Beauty Clinic Lucy Clark Limited | Other services | 2013 |
| THE Blain LE Sage Bar Ltd | Hospitality | 2021 |
| THE Brow Club Permanent Makeup & Brow Studio Ltd | Other services | 2022 |
| THE Chic House Limited | Real estate | 2026 |
| THE Coaching Platform Limited | Professional & scientific | 2022 |
| THE Courtyard Centre for Health and Wellbeing Ltd | Health & social care | 2012 |
| THE Cowshed Cafe Ltd | Hospitality | 2019 |
| THE Creative Direction Group Limited | Information & communication | 2024 |
| THE DBC Group Ltd | Wholesale & retail | 2013 |
| THE END TV Limited | Information & communication | 2006 |
| THE Finish Line Media Limited | Information & communication | 2014 |
| THE Gardeners Village Limited | Wholesale & retail | 2002 |
| THE Geckos Tail Ltd | Administrative & support | 2011 |
| THE Glow Hub -Tanning Limited | Other services | 2026 |
| THE Granary Fretworks LLP | | 2023 |
| THE Gresley Society Trust | Other services | 1999 |
| THE Hair & Makeup Studio Limited | Other services | 2015 |
| THE Hairdressing Academy Limited | Other services | 2025 |
| THE Harkness Rose Company Limited | Wholesale & retail | 2020 |
| THE Holistic Butterfly Ltd | Health & social care | 2025 |
| THE Jordan Trust | Education | 2008 |
| THE Juice Smith Limited | Hospitality | 2014 |
| THE Kumar Group Holdings Limited | Real estate | 2022 |
| THE Little Diffuser Co. Ltd | Manufacturing | 2021 |
| THE Little Mystical Gift Co Ltd | Wholesale & retail | 2026 |
| THE Lockeys Services Ltd | Transport & logistics | 2021 |