| AK Property Management Services Limited | Real estate | 2017 |
| AKA Architects Group Limited | Administrative & support | 2016 |
| AKA Property Ltd | Real estate | 2013 |
| Akanix Ltd | Wholesale & retail | 2025 |
| Akari Hair Ltd | Other services | 2025 |
| AKB Heritage Property Group Ltd | Real estate | 2025 |
| AKB Trading Limited | Wholesale & retail | 2019 |
| Akbar Holdings Limited | Real estate | 2022 |
| Akcs Consulting Limited | Information & communication | 2014 |
| Akenside Development Company Limited | Construction | 1997 |
| Akenside Management Ltd | Real estate | 2014 |
| Akenside Property Management Limited | Real estate | 2000 |
| AKH Labs Limited | Information & communication | 2020 |
| AKJ Limited | Information & communication | 2024 |
| AKK Carwash Ltd | Administrative & support | 2026 |
| AKK Rental Ltd | Administrative & support | 2025 |
| Akmf Properties Ltd | Real estate | 2022 |
| AKN Building Limited | Construction | 2023 |
| AKN Haulage Ltd | Transport & logistics | 2026 |
| Aknonymous Ltd | Information & communication | 2020 |
| AKR Industries Ltd | Other services | 2014 |
| AKR Properties North East Limited | Real estate | 2019 |
| Akr-Pjkts Ltd | Information & communication | 2024 |
| Akrim's Limited | Other services | 2017 |
| AKS Healthcare Limited | Health & social care | 2013 |
| Akshara Retail Limited | Wholesale & retail | 2024 |
| Aktar ALI Ltd | Financial services | 2018 |
| Akuni Limited | Professional & scientific | 2014 |
| AL Amran Catering Ltd | Hospitality | 2019 |
| AL Araby Restaurant Ltd | Hospitality | 2025 |
| AL Bright Dental Ltd | Manufacturing | 2023 |
| AL Fahad Ltd | Hospitality | 2024 |
| AL Hana Limited | Hospitality | 2017 |
| AL Huda Bookstore Ltd | Wholesale & retail | 2025 |
| AL Madayen Express Ltd | Hospitality | 2025 |
| AL Manasik Ltd | Administrative & support | 2023 |
| AL Manzah AL Jameel Trading Co. Ltd | Wholesale & retail | 2025 |
| AL QAF Ltd | Wholesale & retail | 2026 |
| AL Rehman Welfare Project Ltd | Extraterritorial | 2012 |
| AL Saddam Export and Trading Company Ltd | Wholesale & retail | 2025 |
| AL Saso Company Ltd | Wholesale & retail | 2025 |
| AL Seyam Furniture Ltd | Wholesale & retail | 2025 |
| AL Wahaab Holding Ltd | Real estate | 2022 |
| Al's Street Food Ltd | Hospitality | 2022 |
| Al-Ameen Honey Products Limited | Wholesale & retail | 2012 |
| Al-Halal Foodstore Ltd | Wholesale & retail | 2023 |
| Al-Noor Developments (NE) Ltd | Real estate | 2024 |
| Al-Noor Holdings Ltd | Real estate | 2022 |
| Al-Noor Technologies Limited | Construction | 2015 |
| Alaa Solutions Ltd | Information & communication | 2019 |
| Alab Environmental Services Limited | Water & waste | 1992 |
| Alac Limited | Hospitality | 2009 |
| Alachi Indian Cuisine Ltd | Hospitality | 2016 |
| Alahi Ltd | Health & social care | 2022 |
| Alaira Bellissima Ltd | Wholesale & retail | 2026 |
| ALAL1 Limited | Financial services | 2017 |
| Alan & LIN Ltd | Hospitality | 2011 |
| Alan Elrington Associates Limited | Professional & scientific | 1997 |
| Alan Elsdon Ltd | Construction | 2026 |
| Alan Hill (Plumbing & Heating) Limited | Construction | 1996 |
| Alan Howey (M & E Design) Limited | Professional & scientific | 2017 |
| Alan Jackson (Westcotes) Limited | Agriculture & fishing | 1965 |
| Alan R Drylining Ltd | Construction | 2022 |
| Alan Reed Art Limited | Wholesale & retail | 2003 |
| Alan Steel Wealth Management Limited | Extraterritorial | 2014 |
| Alan's Company Newcastle Ltd | Other services | 2020 |
| Alann Richard Clarke Limited | Extraterritorial | 2025 |
| Alar Software Limited | Information & communication | 2021 |
| Alara Talent Ltd | Professional & scientific | 2026 |
| Alaxito Limited | Wholesale & retail | 2024 |
| Alaya Property Management Ltd | Real estate | 2024 |
| ALB Commercial Limited | Wholesale & retail | 2012 |
| Albaik One Gosforth Ltd | Hospitality | 2022 |
| Albany James Ltd | Professional & scientific | 2012 |
| Albion Entertainment Limited | Information & communication | 2021 |
| Albion Global Investments Limited | Real estate | 2021 |
| Alchemy Education Ltd | Education | 2018 |
| Alcyomics Limited | Health & social care | 2007 |
| ALD (NE) Limited | Hospitality | 2026 |
| ALD Investco Limited | Financial services | 2024 |
| Aldarwech Ltd | Real estate | 2023 |
| Alder Cleaning Solutions Ltd | Administrative & support | 2026 |
| Alder Park Residents Management Company Limited | Real estate | 2024 |
| Alderson Bartlett Ltd | Real estate | 2024 |
| Alderwood Law Limited | Professional & scientific | 2023 |
| Alderwood Solutions Limited | Professional & scientific | 2024 |
| Aldmark Electrical Limited | Professional & scientific | 1991 |
| Aldmere Ltd | Wholesale & retail | 2026 |
| Alec Gordon Productions Limited | Arts & recreation | 2018 |
| Alec Hern Pharma Consulting Limited | Professional & scientific | 2016 |
| Alegan Limited | Administrative & support | 2019 |
| Alenjaz MM Ltd | Wholesale & retail | 2024 |
| Alerts Security Installations Limited | Administrative & support | 2001 |
| Aleti Investments Ltd | Real estate | 2022 |
| Aleti Software Systems Ltd | Information & communication | 2021 |
| Alex 57 Ltd | Other services | 2025 |
| Alex Britton Transport Ltd | Transport & logistics | 2021 |
| Alex Courier 365 Ltd | Transport & logistics | 2024 |
| Alex Fairlamb Consultancy Ltd | Education | 2025 |
| Alex James Tiling Specialists Limited | Construction | 2018 |