| A.N.G Medics Limited | Health & social care | 2015 |
| A.N.M Property Ltd | Real estate | 2019 |
| A.O. Locum Services Limited | Health & social care | 2003 |
| A.P Clinicare Ltd | Health & social care | 2014 |
| A.P.D.A. London Limited | Professional & scientific | 2007 |
| A.R.K Catering Ltd | Hospitality | 2023 |
| A.R.M Asset Management Limited | Real estate | 2014 |
| A.S. Therapy Space Ltd | Public administration | 2023 |
| A.S.E.R Limited | Real estate | 2024 |
| A.S.J London Ltd | Real estate | 2025 |
| A.T. Accountants & Co Limited | Professional & scientific | 2009 |
| A.U Traders International Ltd | Wholesale & retail | 2017 |
| A.W. Advertising & Recruitment Ltd | Other services | 2016 |
| A1 Avon Properties Limited | Construction | 2023 |
| A1 Bagel & Deli Ltd | Hospitality | 2019 |
| A1 Building & Maintenance Services Ltd | Construction | 2016 |
| A1 Building Merchant Essex Ltd | Construction | 2020 |
| A1 Caters Ltd | Hospitality | 2026 |
| A1 Choice Catering Ltd | Hospitality | 2016 |
| A1 Cleaning Limited | Administrative & support | 2019 |
| A1 Disposables Ltd | Wholesale & retail | 2019 |
| A1 Euro Lanka Decorators Limited | Other services | 2011 |
| A1 Express Tyres Ltd | Wholesale & retail | 2024 |
| A1 Fashions Ltd | Wholesale & retail | 2021 |
| A1 Finance Solutions Ltd | Financial services | 2025 |
| A1 GAS and Electric Ltd | Construction | 2023 |
| A1 Judo Club Limited | Arts & recreation | 2025 |
| A1 Property Ilford Ltd | Households | 2022 |
| A1 Secure Caring Ltd | Health & social care | 2026 |
| A1 Sheikh Investments Ltd | Real estate | 2024 |
| A1 Surgical Ltd | Health & social care | 2023 |
| A1 TAJ Ltd | Wholesale & retail | 2022 |
| A1 Tax & Account Solutions Ltd | Professional & scientific | 2018 |
| A1 Taxi Services Ltd | Transport & logistics | 2023 |
| A1 Test Dates Ltd | Education | 2025 |
| A1 Wholesale Ltd | Wholesale & retail | 2025 |
| A12 Automotive Car Sales Ltd | Wholesale & retail | 2026 |
| A12 Automotive Ltd | Wholesale & retail | 2024 |
| A1CLICKSHOP Ltd | Wholesale & retail | 2025 |
| A2 Mototech Ltd | Wholesale & retail | 2025 |
| A2 Realty Limited | Financial services | 2019 |
| A2 Solutions Hub Ltd | Information & communication | 2025 |
| A2A Investments Ltd | Real estate | 2022 |
| A2D Investment Limited | Other services | 2024 |
| A2J Services Ltd | Real estate | 2025 |
| A2P Group Limited | Wholesale & retail | 2026 |
| A2TE UK Ltd | Professional & scientific | 2021 |
| A2V Properties Limited | Real estate | 2020 |
| A2Z Care Matters Ltd | Health & social care | 2020 |
| A2Z Cleaning Services Ltd | Administrative & support | 2024 |
| A2Z Consulting Service Limited | Other services | 2019 |
| A2Z Grocer Ltd | Wholesale & retail | 2024 |
| A2Z Logistic Services Ltd | Administrative & support | 2019 |
| A2Z OOH Limited | Construction | 2025 |
| A2Z Resource Group Limited | Administrative & support | 2020 |
| A2Z Security Solutions Ltd | Administrative & support | 2025 |
| A2Z Solutions Ltd | Wholesale & retail | 2025 |
| A2Z Staffing Solutions Limited | Information & communication | 2017 |
| A2Z Tech Ltd | Information & communication | 2016 |
| A2Z Transfers Ltd | Transport & logistics | 2025 |
| A2Z Wearhouse Limited | Wholesale & retail | 2025 |
| A2ZMOBILESUK Ltd | Wholesale & retail | 2019 |
| A3 Brothers Ltd | Wholesale & retail | 2020 |
| A3 Joint Venture Ltd | Real estate | 2020 |
| A3D Limited | Professional & scientific | 2011 |
| A3NTRADING Ltd | Wholesale & retail | 2025 |
| A3SH Ltd | Wholesale & retail | 2023 |
| A4 Security Services Ltd | Administrative & support | 2020 |
| A4R0.COM Ltd | Real estate | 2020 |
| A5K Limited | Administrative & support | 2005 |
| A5X Security Services Limited | Administrative & support | 2025 |
| A69 Limited | Health & social care | 2023 |
| A7 Consultants Ltd | Other services | 2024 |
| A9 Ltd | Wholesale & retail | 2020 |
| AA & AM Properties Ltd | Real estate | 2025 |
| AA Accounting Solutions Ltd | Professional & scientific | 2009 |
| AA Adas Limited | Health & social care | 2014 |
| AA Addison Limited | Other services | 2016 |
| AA Advisors Limited | Professional & scientific | 2025 |
| AA Alpha Limited | Wholesale & retail | 2024 |
| AA and Ishaa Limited | Health & social care | 2021 |
| AA and Ishaa Properties Ltd | Real estate | 2025 |
| AA Asset Holdings Ltd | Real estate | 2025 |
| AA Associates Management Limited | Professional & scientific | 2024 |
| AA Associates Umbrella Limited | Professional & scientific | 2020 |
| AA Bargains Ltd | Wholesale & retail | 2022 |
| AA Cabbing Limited | Transport & logistics | 2026 |
| AA Capital Ventures Ltd | Wholesale & retail | 2025 |
| AA Carpet and Flooring Limited | Wholesale & retail | 2025 |
| AA Coaches Ltd | Transport & logistics | 2024 |
| AA Connect Ltd | Hospitality | 2022 |
| AA Const Ltd | Construction | 2025 |
| AA Dent Ltd | Health & social care | 2023 |
| AA Design House Ltd | Construction | 2018 |
| AA Digging Ltd | Construction | 2023 |
| AA Discounts Ltd | Wholesale & retail | 2025 |
| AA Distributions Ltd | Wholesale & retail | 2018 |
| AA Dream Factory Ltd | Hospitality | 2015 |
| AA Estate Management Ltd | Real estate | 2022 |
| AA Fixing Ltd | Construction | 2015 |