| Tekcor Unlimited | Financial services | 2020 |
| TH Touring Limited | Arts & recreation | 2023 |
| Thbf Music Ltd | Arts & recreation | 2014 |
| THE Copland Butterfly Ltd | Arts & recreation | 2021 |
| THE Eagles Apparel Ltd | Wholesale & retail | 2020 |
| THE Family (Music) 2021 Limited | Administrative & support | 2021 |
| THE Hives Touring LLP | | 2022 |
| THE Igcc Limited | Arts & recreation | 2013 |
| THE Imaging Cloud Limited | Information & communication | 2011 |
| THE Japanese House Touring Limited | Arts & recreation | 2017 |
| THE Music Infrastructure Company Ltd | Information & communication | 2022 |
| THE Unlikely Dads Club Limited | Arts & recreation | 2021 |
| Theelevatingher Ltd | Other services | 2025 |
| THEN3XTUP Ltd | Manufacturing | 2021 |
| They Call ME Locksmith Ltd | Wholesale & retail | 2019 |
| Thomas Bingham Chambers Limited | Professional & scientific | 2013 |
| Thomorrow Limited | Information & communication | 2023 |
| TOM Cooper Limited | Information & communication | 2025 |
| Tonal Union Records Limited | Information & communication | 2020 |
| Touchwood Touring LLP | | 2023 |
| Tourean Live Limited | Arts & recreation | 2012 |
| TT Products Online Ltd | Wholesale & retail | 2018 |
| Tussahs Limited | Wholesale & retail | 2020 |
| TW Prod (2024) Ltd | Arts & recreation | 2023 |
| Twin Galaxies LLP | | 2018 |
| Twin Soul Ltd | Arts & recreation | 2019 |
| Twin Thrones LLP | | 2026 |
| Unruly E-Liquid Ltd | Wholesale & retail | 2018 |
| Uspf Ltd. | Financial services | 2023 |
| Vegarooo Ltd | Wholesale & retail | 2020 |
| Veleory Ltd | Wholesale & retail | 2025 |
| Vertex Music Ltd | Arts & recreation | 2020 |
| Violincore Touring LLP | | 2025 |
| Vivaro Ltd | Wholesale & retail | 2025 |
| VN Mart Limited | Wholesale & retail | 2025 |
| Voodoo Smoke Online Ltd | Hospitality | 2025 |
| W Coleman & Co Limited | Professional & scientific | 2000 |
| W&W Music Publishing Ltd | Arts & recreation | 2025 |
| W&W Productions Limited | Arts & recreation | 2020 |
| WAB Blythe Limited | Real estate | 2008 |
| WAB Exhibitions LLP | | 2017 |
| WAB Sovereign Limited | Real estate | 2008 |
| WAB Topco Limited | Arts & recreation | 2008 |
| Walden Independent Ltd | Information & communication | 2023 |
| Warradale Financial Consultants Limited | Professional & scientific | 2005 |
| Wembley Park Residents’ Management Company Limited | Households | 2023 |
| Western Streetwear Ltd | Wholesale & retail | 2026 |
| Wetherlam Investco LLP | | 2021 |
| White Morrison LLP | | 2020 |
| William a Bong Limited | Information & communication | 1970 |
| William Ace Ltd | Arts & recreation | 2020 |
| Williams Godrich Ltd | Arts & recreation | 2022 |
| Willjcook Limited | Other services | 2013 |
| Wolf Alice Touring LLP | | 2015 |
| Wombats Touring (UK) LLP | | 2013 |
| Wondermake Ltd | Information & communication | 2023 |
| Woof Music Limited | Other services | 2013 |
| Wtrd Ltd | Professional & scientific | 2025 |
| Xela Management Ltd | Information & communication | 2024 |
| Y Royalties Limited | Professional & scientific | 2021 |
| Yakam Merchantile Ltd | Wholesale & retail | 2024 |
| Yasin Global Trading Company Ltd | Wholesale & retail | 2025 |
| Yesir Production Ltd | Arts & recreation | 2025 |
| Yetunde Inherited Limited | Wholesale & retail | 2024 |
| You'Re NOT Famous LLP | | 2009 |
| Your Tunes Limited | Information & communication | 2016 |
| Yuck Limited | Professional & scientific | 2018 |
| Zoot Management LLP | | 2022 |
| Zoot Music Publishing Ltd | Information & communication | 2016 |