| AFK Property Group Ltd | Real estate | 2025 |
| Afod Options Ltd | Health & social care | 2023 |
| Afri Freshly Bakes Ltd | Manufacturing | 2026 |
| Africa Community Limited | Professional & scientific | 2020 |
| Africa's Children of Purpose - U.K. | Other services | 2008 |
| African and Caribbean Fusion Ltd | Manufacturing | 2025 |
| African Caribbean Market Ltd | Wholesale & retail | 2025 |
| Afriqana Limited | Hospitality | 2024 |
| Afro Caribbean Mini Market Ltd | Wholesale & retail | 2022 |
| Afro Caribbean Minimarket & Butcher Limited | Wholesale & retail | 2019 |
| Afro City Store Ltd | Wholesale & retail | 2026 |
| Afro Passion 19 Ltd | Wholesale & retail | 2025 |
| Afro Savvy Chic Limited | Manufacturing | 2025 |
| Afro Treasure Ltd | Wholesale & retail | 2024 |
| Afro United Supermarket Limited | Wholesale & retail | 2025 |
| Afrobrit Barbers Limited | Other services | 2026 |
| Afrochoice Grocery Store Ltd | Wholesale & retail | 2026 |
| AFS Health Limited | Health & social care | 2024 |
| AFY Healthcare Limited | Health & social care | 2022 |
| AG & Co Investments Ltd | Real estate | 2020 |
| AG 43 Limited | Real estate | 2025 |
| AG Auto Parts Ltd | Wholesale & retail | 2009 |
| AG Deal Sourcing Ltd | Real estate | 2024 |
| AG Fast Foods Limited | Hospitality | 2024 |
| AG Retrofit Services Limited | Construction | 2025 |
| AG SAI Ltd | Hospitality | 2022 |
| Ag@Go Service Centre Ltd | Wholesale & retail | 2022 |
| AGA Healthcare Ltd | Health & social care | 2024 |
| AGA Rendering&Plastering Ltd | Construction | 2024 |
| AGA Supermarket Ltd | Wholesale & retail | 2025 |
| Agaleao Developments Limited | Real estate | 2021 |
| Agam Aujla Limited | Financial services | 2025 |
| Agates Care Limited | Health & social care | 2016 |
| Agbor Eben & Co Ltd | Wholesale & retail | 2022 |
| AGC Buildpro Solution Ltd | Construction | 2024 |
| Agdg Consulting Services Ltd | Extraterritorial | 2025 |
| AGE Concern Wolverhampton | Information & communication | 1995 |
| Agea Property Ltd | Real estate | 2025 |
| Agelessperfectionaesthetic Ltd | Other services | 2024 |
| Agency Titans Limited | Administrative & support | 2024 |
| Agent Marketer Ltd | Administrative & support | 2022 |
| Agentclip Ltd | Information & communication | 2025 |
| Agifm Ltd | Other services | 2019 |
| Agile Maintenance Solutions Limited | Manufacturing | 2024 |
| AGJ Properties Limited | Construction | 2020 |
| AGM Investments Ltd | Real estate | 2018 |
| Agora Design Build Ltd | Construction | 2024 |
| Agra Group Limited | Financial services | 2025 |
| Agricultural Contracts Limited | Agriculture & fishing | 2014 |
| AGS Complete Homecare Ltd | Construction | 2025 |
| AGS Shopfitters Limited | Wholesale & retail | 2006 |
| Aguila Mclaren Ltd | Construction | 2025 |
| AGX Developments Ltd | Financial services | 2025 |
| AH Ecommerce Ltd | Wholesale & retail | 2026 |
| AH Investments Midlands Limited | Construction | 2024 |
| AHA Logistical Solutions Ltd | Transport & logistics | 2022 |
| Ahad Online Ltd | Wholesale & retail | 2026 |
| Ahad.A Limited | Real estate | 2024 |
| AHH Services Ltd | Education | 2022 |
| Ahhh Limited | Real estate | 2021 |
| AHI Health Care Services Limited | Health & social care | 2026 |
| AHI Locum Services Ltd | Health & social care | 2015 |
| AHM and Sons Limited | Professional & scientific | 2012 |
| Ahmad ALI Mart Ltd | Wholesale & retail | 2026 |
| Ahmad Edge Ltd | Wholesale & retail | 2025 |
| Ahmad Inc Limited | Information & communication | 2023 |
| Ahmad Plastering Services Ltd | Construction | 2023 |
| Ahmed Accountancy Services Ltd | Professional & scientific | 2023 |
| Ahmed Fahim Ltd | Health & social care | 2014 |
| Ahmed Investment and Trading Ltd | Financial services | 2025 |
| Ahmedkana UK Limited | Health & social care | 2014 |
| Ahmerchant Ltd | Wholesale & retail | 2026 |
| Ahouja's Ltd | Wholesale & retail | 2017 |
| Ahouja’S Properties Ltd | Real estate | 2023 |
| Ahuriri Ltd | Administrative & support | 2017 |
| AI Accelerate Growth Limited | Professional & scientific | 2020 |
| AI Acquisition Community Ltd | Information & communication | 2026 |
| AI Agent Unit Ltd | Information & communication | 2025 |
| AI Capital Holdings Limited | Professional & scientific | 2025 |
| AI Investments Limited | Real estate | 2015 |
| AI Materials Limited | Wholesale & retail | 2025 |
| AI Plant Hire Limited | Administrative & support | 2025 |
| AI Safer Drive Ltd | Education | 2025 |
| AI Spotlights Ltd | Information & communication | 2025 |
| AI Sysflow Limited | Information & communication | 2025 |
| AIA IT Solutions Limited | Information & communication | 2007 |
| AIB Foods Limited | Manufacturing | 2009 |
| Aida&Sons Ltd | Wholesale & retail | 2018 |
| Aidcore Technologies Ltd | Information & communication | 2024 |
| Aigmented Limited | Information & communication | 2018 |
| Aijr Limited | Education | 2025 |
| Aim-High Tuition Ltd | Education | 2022 |
| Aim.Aspire.Achieve Ltd | Health & social care | 2019 |
| Aintree Holdings (Dudley) Limited | Financial services | 2025 |
| Aintree House Consulting Limited | Professional & scientific | 2018 |
| Aioc Limited | Transport & logistics | 2023 |
| Air Brake One Ltd | Wholesale & retail | 2026 |
| Air Door Services Limited | Manufacturing | 2004 |
| Air Filters Direct Limited | Wholesale & retail | 2025 |
| Air Methods Limited | Wholesale & retail | 1955 |