| Alexandra Trading and News Ltd | Wholesale & retail | 2024 |
| Alexandrina Limited | Transport & logistics | 2020 |
| Alexandru Coruga Ltd | Wholesale & retail | 2017 |
| Alexandru World Trans Ltd | Transport & logistics | 2025 |
| Alexandrumihaibirsan Ltd | Transport & logistics | 2020 |
| Alfacore Construction Ltd | Construction | 2021 |
| Alfie C Ltd | Information & communication | 2023 |
| Alfresco Landscaping Ltd. | Administrative & support | 2007 |
| Alga Engineering Ltd | Transport & logistics | 2024 |
| Algora Store Ltd | Wholesale & retail | 2025 |
| ALI & Dari Limited | Transport & logistics | 2015 |
| ALI Askher Investments Ltd | Real estate | 2025 |
| ALI Baba Stores Limited | Wholesale & retail | 2024 |
| ALI Chem Limited | Wholesale & retail | 1986 |
| ALI DNZ Group Ltd | Hospitality | 2024 |
| ALI Hajveri Ltd | Wholesale & retail | 2025 |
| ALI Model Store Ltd | Wholesale & retail | 2025 |
| ALI Real Estate Ltd | Real estate | 2017 |
| ALI Vels Ltd | Hospitality | 2019 |
| ALI Vels Takeaway Ltd | Hospitality | 2024 |
| Ali's Car Valeting and Detailing Limited | Wholesale & retail | 2026 |
| Aliaus Transport Ltd | Transport & logistics | 2015 |
| Alice Media Ltd | Wholesale & retail | 2026 |
| Alice Naylor-Leyland Limited | Wholesale & retail | 2020 |
| Alif Jewels Ltd | Wholesale & retail | 2025 |
| Align Property Investments Ltd | Real estate | 2025 |
| Aligned Life Ltd. | Wholesale & retail | 2020 |
| Alimab Ltd | Health & social care | 2014 |
| Alin and Elena Ltd | Transport & logistics | 2024 |
| Alin Arhanghel Hair Studio Ltd | Other services | 2017 |
| Alin Petrica Ltd | Transport & logistics | 2019 |
| Alinas Service Accommodation Ltd | Real estate | 2023 |
| Aliph Accountants Ltd | Professional & scientific | 2023 |
| Alisherbrothers Ltd | Wholesale & retail | 2025 |
| Alisia Banu CRY Ltd | Administrative & support | 2014 |
| Alison Faith Interiors Ltd | Professional & scientific | 2024 |
| Alison Wilson Ltd | Wholesale & retail | 2025 |
| Alistair Properties Ltd | Households | 2019 |
| Alistair Viner Ltd | Wholesale & retail | 2024 |
| Alitransport&Truckdv Limited | Administrative & support | 2025 |
| Alive Connected Limited | Professional & scientific | 2023 |
| Aliza London Ltd | Wholesale & retail | 2021 |
| Alizada Brothers Limited | Wholesale & retail | 2017 |
| Ali’S Coffee Box Limited | Wholesale & retail | 2021 |
| Aljawad Dermatology Ltd | Health & social care | 2026 |
| ALK Interiors Ltd | Construction | 2025 |
| Alkaline Plaice Limited | Hospitality | 2025 |
| Alkat Research and Resourcing Ltd | Real estate | 2022 |
| Alkebulan Eden Gardens Ltd | Wholesale & retail | 2023 |
| Alkhodor Recovery Limited | Transport & logistics | 2026 |
| Alkye Limited | Information & communication | 2024 |
| ALL - IND Limited | Wholesale & retail | 2005 |
| ALL About Your Dog Day Care Ltd | Other services | 2012 |
| ALL Build Plus Homes Ltd | Real estate | 2024 |
| ALL Build Plus Ltd | Construction | 2023 |
| ALL GAS Heating Solutions Limited | Administrative & support | 2011 |
| ALL Legal Solicitors Ltd | Professional & scientific | 2023 |
| ALL Skills Recruitment Limited | Professional & scientific | 2022 |
| ALL Star Country Festival Ltd | Arts & recreation | 2023 |
| ALL Things Caffeine Ltd | Professional & scientific | 2018 |
| All-In Design Limited | Professional & scientific | 2011 |
| All-Tech Electrical&Mechanical Ltd | Manufacturing | 2018 |
| Allaboutbants Ltd | Information & communication | 2020 |
| Allbright Property Maintenance Ltd | Construction | 2014 |
| Allen Living Limited | Real estate | 2023 |
| Allen Warner LLP | | 2021 |
| Allensis Properties Ltd | Real estate | 2025 |
| Allertons AED Ltd | Wholesale & retail | 2016 |
| Alletech Ltd | Wholesale & retail | 2026 |
| Allgood Cambs Holdings Limited | Financial services | 2010 |
| Allgood Services Ltd. | Construction | 2001 |
| Allhandz Limited | Wholesale & retail | 2025 |
| Allied Business Group Ltd | Information & communication | 2018 |
| Allied Cleaning Ltd | Administrative & support | 2024 |
| Allied Decorating Ltd | Construction | 2020 |
| Allied Ecology Ltd | Professional & scientific | 2022 |
| Allied Properties Cambs Limited | Real estate | 2025 |
| Allied Property Maintenance Ltd | Construction | 2023 |
| Allinsons Agricultural Services Ltd | Financial services | 2025 |
| Allison (Longmoor) Development Limited | Construction | 2025 |
| Allison Homes (Pinchbeck) Limited | Extraterritorial | 2015 |
| Allison Homes and HGP Developments Limited | Financial services | 2025 |
| Allison Homes Developments Limited | Construction | 2025 |
| Allison Homes East Midlands Limited | Construction | 2024 |
| Allison Homes Group Limited | Professional & scientific | 2017 |
| Allison Homes Holdings Limited | Financial services | 2025 |
| Allison Homes JV Holdings Limited | Financial services | 2025 |
| Allison Homes Limited | Construction | 2007 |
| Allison Homes Norfolk and Suffolk Limited | Construction | 2015 |
| Allison Homes South West Limited | Construction | 2011 |
| Allison Homes SW Limited | Construction | 2017 |
| Allium Armourer Services Ltd | Other services | 2025 |
| Allm Properties Limited | Real estate | 2019 |
| Allora Group Limited | Manufacturing | 2022 |
| Allreach Group Ltd | Professional & scientific | 2024 |
| Allsopp Estates LLP | | 2024 |
| Allsorts Groundworks Limited | Construction | 2014 |
| Allstars Football Arena Limited | Arts & recreation | 2024 |
| Allthetopbananas.Com Limited | Information & communication | 2006 |
| Alltorq Ltd | Energy | 2009 |