| A to Z Health Services Limited | Health & social care | 2020 |
| A to Z Heating & Plumbing Services Ltd | Construction | 2016 |
| A to Z Household Bazaar Limited | Wholesale & retail | 2024 |
| A to Z Immigration Ltd | Other services | 2015 |
| A to Z Interior Design Ltd | Construction | 2023 |
| A to Z Leather Ltd | Wholesale & retail | 2016 |
| A to Z London Construction Ltd | Construction | 2023 |
| A to Z Meat Suppliers Ltd | Wholesale & retail | 2025 |
| A to Z Medical Ltd | Health & social care | 2014 |
| A to Z Metal Roofing and Cladding Limited | Construction | 2023 |
| A to Z Mover & Cleaner Ltd | Transport & logistics | 2025 |
| A to Z Pickup Ltd | Transport & logistics | 2019 |
| A to Z Portfolio Ltd | Real estate | 2025 |
| A to Z Prime Properties Ltd | Real estate | 2025 |
| A to Z Properties Holdings Limited | Financial services | 2019 |
| A to Z Property Group Limited | Real estate | 2018 |
| A to Z Property Managment Ltd | Real estate | 2018 |
| A to Z Property Managment-M&D Ltd | Administrative & support | 2024 |
| A to Z Property Partners Ltd | Real estate | 2024 |
| A to Z Roofing and Building Limited | Construction | 2023 |
| A to Z Seating Ltd | Manufacturing | 2021 |
| A to Z Signs London Ltd | Professional & scientific | 2024 |
| A to Z Stone Repairs Limited | Construction | 2007 |
| A to Z Suppliers Ltd | Wholesale & retail | 2020 |
| A to Z Trading & Services Ltd | Health & social care | 2014 |
| A to Z Trading Ltd | Professional & scientific | 2018 |
| A to Z Transport Solutions Limited | Transport & logistics | 2024 |
| A to Z Warehousing Limited | Administrative & support | 2006 |
| A to Z Wood Flooring Limited | Manufacturing | 2025 |
| A to Z Your Sign & Design Ltd | Construction | 2023 |
| A to Z Zenith Platform Limited | Manufacturing | 2016 |
| A Toast to Toasties Ltd | Wholesale & retail | 2026 |
| A Toca Limited | Hospitality | 2015 |
| A Todd Business Associates Limited | Professional & scientific | 2005 |
| A Topiary Editing Ltd | Information & communication | 2015 |
| A Tori Construction Ltd | Construction | 2021 |
| A Tori Development Ltd | Real estate | 2023 |
| A Tory & Co Ltd | Professional & scientific | 2025 |
| A Total Office Kleaning (London) Limited | Administrative & support | 1998 |
| A Touch of Class Caribbean Kitchen Limited | Hospitality | 2019 |
| A Touch of Class Events (UK) Ltd | Wholesale & retail | 2018 |
| A Touch of Code Limited | Information & communication | 2018 |
| A Touch of Comfort Ltd | Professional & scientific | 2020 |
| A Touch of Tiff’S Ltd | Other services | 2026 |
| A Tout Ltd | Professional & scientific | 2025 |
| A Town Barberz Ltd | Other services | 2022 |
| A Toy a Day Ltd | Wholesale & retail | 2024 |
| A Trade Property Services Ltd | Construction | 2026 |
| A Trail to Remember Ltd | Wholesale & retail | 2025 |
| A Transformative Space Ltd | Health & social care | 2025 |
| A Transiçao Verde Ltd | Agriculture & fishing | 2023 |
| A Transport Consultancy Ltd | Transport & logistics | 2026 |
| A Tree in Bani Limited | Information & communication | 2021 |
| A Tribe Called Progress Ltd | Administrative & support | 2019 |
| A Tribe Called West Ltd | Professional & scientific | 2022 |
| A Tribute to Fashion Ltd | Wholesale & retail | 2022 |
| A Tribute to Life Ltd. | Information & communication | 2025 |
| A Trini Thing Ltd | Hospitality | 2021 |
| A Triple M Cars Limited | Transport & logistics | 2019 |
| A True Move Limited | Manufacturing | 2021 |
| A TUB of Monkeys Ltd | Professional & scientific | 2023 |
| A Tula TM Ltd | Construction | 2019 |
| A Tutors Limited | Education | 2024 |
| A Twist of Date Ltd | Wholesale & retail | 2021 |
| A Tyler Photography Limited | Professional & scientific | 2013 |
| A U Autos Ltd | Wholesale & retail | 2024 |
| A U Prime Ltd | Wholesale & retail | 2025 |
| A UCE Construction Ltd | Construction | 2025 |
| A Unicorn Estates Limited | Real estate | 2015 |
| A V a Accountancy Services Ltd | Professional & scientific | 2016 |
| A V Asset Management Ltd | Real estate | 2023 |
| A V Commercial Finance Ltd | Financial services | 2017 |
| A V Mcdonald Limited | Administrative & support | 2011 |
| A V Moves Services Ltd | Transport & logistics | 2024 |
| A V Property Management Ltd | Real estate | 2013 |
| A V Savla Accountants Ltd | Professional & scientific | 2023 |
| A V Smart Convenience Ltd | Wholesale & retail | 2025 |
| A V V Assets Ltd | Professional & scientific | 2015 |
| A V Wason Properties Ltd | Real estate | 2020 |
| A VE Healthcare Ltd | Health & social care | 2023 |
| A Vehicle Hire Ltd | Administrative & support | 2026 |
| A Venus Kitchenx Limited | Wholesale & retail | 2026 |
| A Very Naughty Christmas UK Ltd | Arts & recreation | 2024 |
| A Vishwakarma Ltd | Wholesale & retail | 2025 |
| A Visual by Benji Ltd | Information & communication | 2022 |
| A W Brooks Haulage Limited | Transport & logistics | 2015 |
| A W Cabs Limited | Transport & logistics | 2010 |
| A W Care Services Ltd | Health & social care | 2023 |
| A W D Consult Ltd | Administrative & support | 2025 |
| A W Decorating Ltd | Construction | 2025 |
| A W Electrical Limited | Construction | 2000 |
| A W Enterprises Ltd | Information & communication | 2022 |
| A W F Property Management Ltd | Real estate | 2016 |
| A W G Building & Construction Co. Ltd | Construction | 2004 |
| A W Holiday Letting Limited | Hospitality | 2016 |
| A W J Construction Ltd | Construction | 2017 |
| A W Partition Ltd | Construction | 2011 |
| A W Property Solutions Ltd | Real estate | 2025 |
| A W Renamed Ltd | Information & communication | 2023 |
| A W Strategic Consulting Ltd | Professional & scientific | 2025 |