| 01071506 Limited | Wholesale & retail | 1972 |
| 1 Click Blinds Ltd | Wholesale & retail | 2021 |
| 121 Transport Ltd | Transport & logistics | 2025 |
| 18WS Ltd | Real estate | 2020 |
| 1BITEFASTFOOD Ltd | Hospitality | 2025 |
| 1ST United Care Ltd | Administrative & support | 2026 |
| 1UP Consulting Ltd | Information & communication | 2013 |
| 2CC Enterprises Ltd | Real estate | 2024 |
| 2GZ Trading Ltd | Wholesale & retail | 2019 |
| 2J PUB Group Ltd | Hospitality | 2025 |
| 2MN Ltd | Health & social care | 2026 |
| 3 U Projects Ltd | Construction | 2022 |
| 3IB Property Solutions Ltd | Real estate | 2026 |
| 3RD Generation Tattoos Limited | Administrative & support | 2010 |
| 3THINK Ltd | Manufacturing | 2004 |
| 4 Corners Packing Services Limited | Transport & logistics | 2022 |
| 4K Deals Ltd | Wholesale & retail | 2020 |
| 4U Homes Ltd | Real estate | 2025 |
| 75 Group Ltd | Wholesale & retail | 2021 |
| 77M Ltd | Wholesale & retail | 2025 |
| 7A Dudley AVENUE1968 Limited | Extraterritorial | 2014 |
| 804 Beds Ltd | Manufacturing | 2025 |
| A & a Electrical & Plumbing Limited | Wholesale & retail | 2016 |
| A & B Consultants Limited | Professional & scientific | 2015 |
| A & E Body Clinic Limited | Wholesale & retail | 2016 |
| A & RS T/A Route 1. Limited | Administrative & support | 2022 |
| A & Z Limited | Professional & scientific | 2011 |
| A D Hoyle GAS Services Ltd | Construction | 2023 |
| A F Patel Ltd | Hospitality | 2024 |
| A JAN Enterprise Limited | Wholesale & retail | 2024 |
| A L Electrical Contractors Limited | Construction | 2013 |
| A M Bargain Ltd | Wholesale & retail | 2022 |
| A One Transport (Leeds) Limited | Information & communication | 2001 |
| A R Rajah Ltd | Real estate | 2025 |
| A R Turbo Engineering Limited | Manufacturing | 1998 |
| A Rehman Haulage Ltd | Transport & logistics | 2025 |
| A S T Logistics Limited | Manufacturing | 2018 |
| A to Z Medical Instruments Limited | Wholesale & retail | 2009 |
| A to Z Sales Ltd | Wholesale & retail | 2015 |
| A Zafar Limited | Administrative & support | 2016 |
| A&L Hafidh Limited | Administrative & support | 2020 |
| A&N Batley Properties Ltd | Households | 2025 |
| A&Q UK Fones Ltd | Wholesale & retail | 2023 |
| A&T Solutions Ltd | Wholesale & retail | 2024 |
| A-Z Dadipatel Limited | Wholesale & retail | 2023 |
| A.M.Visuals Ltd | Information & communication | 2025 |
| A.N.A Pharma Ltd | Wholesale & retail | 2017 |
| A.S.G. Fabrications (Holdings) Limited | Financial services | 2023 |
| A.S.G. Fabrications Limited | Manufacturing | 2002 |
| A.Walker Building Services Limited | Construction | 2022 |
| A1 Foam Flex Ltd | Manufacturing | 2020 |
| A1 Food Products Ltd | Manufacturing | 2016 |
| A2Z Beds Limited | Manufacturing | 2022 |
| AA Leeds Properties Ltd | Real estate | 2025 |
| AA Mobile Mechanic Ltd | Wholesale & retail | 2022 |
| AA Paving Ltd | Construction | 2025 |
| AAK Motors Limited | Wholesale & retail | 2023 |
| AAM Traders Ltd | Wholesale & retail | 2026 |
| Aaripharma Limited | Health & social care | 2023 |
| Aasim M Consultants Ltd | Administrative & support | 2026 |
| AB GAS Solutions Ltd | Construction | 2023 |
| AB Print (Holdings) Limited | Financial services | 2020 |
| Abbas Trade Ltd | Wholesale & retail | 2025 |
| Abbasia Enterprises Ltd | Wholesale & retail | 2024 |
| ABD Ltd | Wholesale & retail | 2023 |
| Abdul Travels Ltd | Transport & logistics | 2026 |
| Abhl Holdco Limited | Financial services | 2025 |
| Abraham & Sons Ltd | Transport & logistics | 2014 |
| ABS Optics Limited | Professional & scientific | 2023 |
| Absolute MGT Ltd | Wholesale & retail | 2021 |
| Absolute Product Solutions Limited | Administrative & support | 2012 |
| AC GAS Services Ltd | Real estate | 2018 |
| Acacallis Limited | Professional & scientific | 2012 |
| Acas Electrical (Online) Ltd | Wholesale & retail | 2023 |
| Acas Electrical (Wholesale) Ltd | Wholesale & retail | 2023 |
| Acas Electrical Limited | Wholesale & retail | 2014 |
| Acas Group Holdings Ltd | Financial services | 2022 |
| Access (Steeplejacks) Limited | Other services | 2009 |
| Access Maintenance Solutions Limited | Construction | 1974 |
| Accident Hire Claims Ltd | Administrative & support | 2019 |
| Accord Flooring Limited | Construction | 2002 |
| Accountsense Services Limited | Professional & scientific | 2016 |
| Accuratax Accountancy Services Ltd | Professional & scientific | 2023 |
| Ace Distribution Ltd | Transport & logistics | 2024 |
| Ace Dream Beds Ltd | Manufacturing | 2026 |
| Acme Couriers Ltd | Transport & logistics | 2013 |
| Acorn Tree Properties Limited | Real estate | 2025 |
| Acpl London Ltd | Manufacturing | 2019 |
| ACT NOW Training Limited | Education | 2002 |
| Active Archaeology Limited Liability Partnership | | 2003 |
| Active Surveillance Ltd | Administrative & support | 2022 |
| ACV Holdings Limited | Financial services | 2023 |
| AD Horizon Holdings Ltd | Financial services | 2025 |
| AD53LZS Limited | Real estate | 2025 |
| Adam Brands Ltd | Real estate | 2021 |
| Adam CEX Ltd | Wholesale & retail | 2012 |
| Adams Care SL Ltd | Public administration | 2020 |
| Adamsons Van Parts Ltd | Wholesale & retail | 2022 |
| Adept Site Management Ltd | Extraterritorial | 2022 |
| Adhkar Ltd | Wholesale & retail | 2026 |