| Ack.Autoservice Limited | Wholesale & retail | 2017 |
| ACL (Manchester) Ltd | Hospitality | 2012 |
| ACS Web Development Ltd | Information & communication | 2013 |
| Activate Solutions Ltd | Wholesale & retail | 2025 |
| Active Glaze Ltd | Construction | 2022 |
| Active Lifestyle Solutions Ltd | Health & social care | 2024 |
| Active Watch Security Solution Ltd | Administrative & support | 2018 |
| ACTIVE8SECURITY Ltd | Construction | 2026 |
| Adam Car Hire Ltd | Transport & logistics | 2018 |
| Adam Hunt Contracting Limited | Administrative & support | 2022 |
| Adam's Barber (Ashton) Limited | Other services | 2024 |
| Adams of Woodley Limited | Wholesale & retail | 2014 |
| Adams Pet Supplies Ltd | Wholesale & retail | 2022 |
| Adamstwo Ltd | Wholesale & retail | 2024 |
| Adaptive Finance Ltd | Financial services | 2013 |
| Adaptive Money Limited | Financial services | 2015 |
| ADC Vehicle Services Ltd | Wholesale & retail | 2018 |
| Addcoffee Ltd | Wholesale & retail | 2010 |
| Adhesives Consultancy Services Ltd | Professional & scientific | 2023 |
| ADM Roofing Services Ltd | Construction | 2022 |
| ADM Services NW Ltd | Construction | 2022 |
| Adrian&Dinca Limited | Transport & logistics | 2022 |
| ADS Airconditioning Ltd | Energy | 2024 |
| Adultsworld Limited | Extraterritorial | 2012 |
| Advance Workshops Limited | Real estate | 1972 |
| Advanced Access Solutions GB Ltd | Construction | 2016 |
| Advanced Dishwasher Repairs Ltd | Manufacturing | 2017 |
| Advanced Security Systems UK Ltd. | Administrative & support | 1998 |
| Advancement Design Limited | Professional & scientific | 2019 |
| Aedropshippes Limited | Wholesale & retail | 2024 |
| AF Tradings Ashton Ltd | Real estate | 2025 |
| Afford a KAR Rentals Limited | Administrative & support | 2024 |
| Afforda Mart Ltd | Wholesale & retail | 2025 |
| Afghan Kebab House Ltd | Hospitality | 2024 |
| Afiabella Ltd | Wholesale & retail | 2026 |
| Aflomax Property Limited | Real estate | 2025 |
| African Wholesomu Foods Limited | Hospitality | 2023 |
| AG Socials Limited | Wholesale & retail | 2026 |
| Agatha Healthcare Services Ltd | Health & social care | 2017 |
| AGE UK Tameside | Health & social care | 2011 |
| Agent 365 Ltd | Administrative & support | 2012 |
| AHA Trading Ltd | Wholesale & retail | 2026 |
| Ahmed Fish N Chips Ltd | Hospitality | 2023 |
| AHR Fashion Style Ltd | Wholesale & retail | 2024 |
| AHR Wholesale Ltd | Wholesale & retail | 2025 |
| Ahsisa Distribution Ltd | Wholesale & retail | 2023 |
| AHU Traders UK Ltd | Wholesale & retail | 2024 |
| Ahztraders Ltd | Wholesale & retail | 2025 |
| AI DEV Solutions Ltd | Information & communication | 2024 |
| Aidan Walsh Limited | Professional & scientific | 1998 |
| Aidh Trading Ltd | Wholesale & retail | 2024 |
| AIF Wholesalers Ltd | Wholesale & retail | 2023 |
| AIK Solutions Ltd | Households | 2025 |
| Aimtracer Ltd | Professional & scientific | 2005 |
| Ainopa Limited | Extraterritorial | 2013 |
| Airtec Air Systems Limited | Wholesale & retail | 2001 |
| Aishahcreates Limited | Professional & scientific | 2025 |
| Ajcg Services Limited | Administrative & support | 2018 |
| Ajco Ltd | Wholesale & retail | 2026 |
| Ajet Vending Ltd | Wholesale & retail | 2025 |
| AJK Holdings Group Limited | Financial services | 2023 |
| AJK Motor Sales Limited | Wholesale & retail | 2023 |
| AJK Property Ventures Limited | Real estate | 2023 |
| Ajnp Softwares Ltd | Information & communication | 2024 |
| AJP Professional Engineering Limited | Professional & scientific | 2017 |
| AJR Building Consultancy Ltd | Construction | 2024 |
| AJR Property Holdings Ltd | Real estate | 2026 |
| AK Holdings MCR Limited | Financial services | 2026 |
| AK96 Online Ltd | Wholesale & retail | 2021 |
| Akash's Financial Services Limited | Financial services | 2016 |
| Akera Consulting Ltd | Information & communication | 2026 |
| Akhtar Complex Ltd | Real estate | 2023 |
| AKO Executive Accounting Services Ltd | Professional & scientific | 2020 |
| Akshar 93 Ltd | Wholesale & retail | 2022 |
| Aksina Trade Ltd | Wholesale & retail | 2026 |
| AL & GT Properties Limited | Real estate | 2010 |
| AL Burraq Ventures Ltd | Wholesale & retail | 2026 |
| AL Khair Capital UK Ltd | Real estate | 2022 |
| AL Usman IT Services Ltd | Information & communication | 2024 |
| Aladin Motor Services Ltd | Wholesale & retail | 2019 |
| Alban Court Apartment Management Company Limited | Real estate | 2007 |
| Albans Barber Ltd | Other services | 2021 |
| Alce Paradise Limited | Real estate | 2024 |
| Aldow Enterprise Park Management Company Limited | Construction | 1995 |
| Alec Brennand Limited | Extraterritorial | 2009 |
| Aleksiev and Sons Intertrans Ltd | Transport & logistics | 2026 |
| Alerry Limited | Real estate | 2021 |
| Alex Jones Estate Agents Ltd | Real estate | 2021 |
| Alex Jones Sales and Lettings Ltd | Real estate | 2015 |
| Alexander Lettings Ltd | Other services | 2014 |
| Alfa Solution Ltd | Construction | 2011 |
| ALI & Bloom Ltd | Wholesale & retail | 2025 |
| Aline.Care Ltd | Public administration | 2022 |
| ALL Property Services (NW) Limited | Construction | 2022 |
| All-In-One Goods Store Ltd | Wholesale & retail | 2025 |
| Alliance & Cooper Legal Ltd | Professional & scientific | 2024 |
| Alliance Facility Management Ltd | Administrative & support | 2019 |
| Allii Ltd | Information & communication | 2025 |
| Almari INT Ltd | Wholesale & retail | 2024 |
| Almeertrends Ltd | Wholesale & retail | 2025 |