| Advance Synergy Group Limited | Wholesale & retail | 2020 |
| Advance Technical Solutions Ltd | Construction | 2026 |
| Advanced Practitioners Limited | Health & social care | 2024 |
| Advanced Windscreens Blackburn Limited | Wholesale & retail | 2016 |
| ADVANCED3DPS. Ltd | Manufacturing | 2024 |
| Advania Global Ltd | Manufacturing | 2020 |
| Advantage Intelligence Limited | Information & communication | 2026 |
| Adventure North West Ltd | Real estate | 2014 |
| Adventures in Freelance Limited | Information & communication | 2023 |
| Advert Clock Ltd | Information & communication | 2025 |
| Advocap Services Ltd | Administrative & support | 2025 |
| Advocap UK Ltd | Professional & scientific | 2025 |
| ADZ Consultancy Limited | Professional & scientific | 2025 |
| AE Retail Ltd | Wholesale & retail | 2026 |
| AEG Pack Ltd | Administrative & support | 2021 |
| Aeolus Aspetic Limited | Wholesale & retail | 2025 |
| AER Accountants Limited | Professional & scientific | 2018 |
| Aero Wings Ltd | Hospitality | 2026 |
| Aesthetics by KH Ltd | Wholesale & retail | 2023 |
| AEW Freehold Ltd | Real estate | 2018 |
| AF Health Ltd | Health & social care | 2017 |
| AFA Civil Limited | Construction | 2025 |
| AFA Telecoms Limited | Construction | 2025 |
| Affan Foods UK Ltd | Wholesale & retail | 2023 |
| Affinity HR Limited | Administrative & support | 2023 |
| Affinity Medical Services Ltd | Health & social care | 2011 |
| Affordable Bar & Catering Equipment Direct Ltd | Wholesale & retail | 2003 |
| Affordable Spares Ltd | Wholesale & retail | 2023 |
| Affy's Great Harwood Ltd | Hospitality | 2024 |
| Afloatbyak Ltd | Wholesale & retail | 2025 |
| AFR Holdings Limited | Professional & scientific | 2015 |
| AFR Recruitment and Resourcing Limited | Administrative & support | 2013 |
| AFR Transactional Recruitment Limited | Administrative & support | 2013 |
| Afrou Limited | Manufacturing | 2023 |
| Afrozapharm Ltd | Health & social care | 2022 |
| AFS 1 Ltd | Real estate | 2022 |
| AFS Compliance Ltd | Administrative & support | 2005 |
| AFS Consultants Limited | Professional & scientific | 2011 |
| AFS Finance Ltd | Extraterritorial | 2015 |
| AFS Financial Services Group Ltd | Other services | 2023 |
| AFS Group Holdings Ltd | Financial services | 2015 |
| AFS Lease (UK) Ltd | Extraterritorial | 2008 |
| AFS Vehicle Leasing Limited | Administrative & support | 2017 |
| Afshin Electrics Ltd | Hospitality | 2019 |
| Aftab Asghar Ltd | Transport & logistics | 2025 |
| Aftab Projects Limited | Manufacturing | 2004 |
| After Pierce Labs Ltd | Wholesale & retail | 2021 |
| After Strand Limited | Wholesale & retail | 2012 |
| Afterglow Sun Therapy Ltd | Other services | 2022 |
| Afzaal a Ltd | Education | 2022 |
| Afzal Commercials Limited | Real estate | 2018 |
| AG Campus Living NUM (1) Ltd | Hospitality | 2026 |
| AG Construction (NW) Limited | Construction | 2022 |
| AG Construction (NW1) Ltd | Construction | 2022 |
| AG Development NUM (1) Ltd | Real estate | 2022 |
| AG Retail NUM (1) Ltd | Real estate | 2020 |
| AG Retail NUM (10) Ltd | Construction | 2024 |
| AG Retail NUM (11) Ltd | Construction | 2024 |
| AG Retail NUM (12) Ltd | Construction | 2024 |
| AG Retail NUM (13) Ltd | Construction | 2024 |
| AG Retail NUM (14) Ltd | Construction | 2024 |
| AG Retail NUM (15) Ltd | Construction | 2024 |
| AG Retail NUM (2) Ltd | Real estate | 2020 |
| AG Retail NUM (3) Ltd | Real estate | 2020 |
| AG Retail NUM (4) Ltd | Construction | 2020 |
| AG Retail NUM (5) Ltd | Real estate | 2021 |
| AG Retail NUM (6) Ltd | Real estate | 2021 |
| AG Retail NUM (7) Ltd | Real estate | 2021 |
| AG Retail NUM (8) Ltd | Real estate | 2021 |
| AG Retail NUM (9) Ltd | Real estate | 2021 |
| AG Roofing Limited | Construction | 2019 |
| AG Transport NW Ltd | Transport & logistics | 2022 |
| AG Wholesales Limited | Wholesale & retail | 2022 |
| Agate Autos Ltd | Wholesale & retail | 2019 |
| AGE UK Blackburn With Darwen | Health & social care | 2011 |
| Agile Management LLP | | 2013 |
| AGJ Logistics Limited | Transport & logistics | 2010 |
| AGL Rapid Cctv Solutions Ltd | Administrative & support | 2022 |
| AGL Sheetmetal Limited | Manufacturing | 2026 |
| Agma Properties Ltd | Real estate | 2023 |
| Agnar Group Ltd | Administrative & support | 2024 |
| Agnes & James Developments Group Limited | Real estate | 2026 |
| Agonaba Company Limited | Wholesale & retail | 2024 |
| Agriquip Engineering Limited | Manufacturing | 2011 |
| AGS Mechanics Ltd | Wholesale & retail | 2022 |
| AGS Plumbing and Heating Ltd | Construction | 2026 |
| AH Consultancy Services Limited | Information & communication | 2005 |
| AH Holdings (London) Ltd | Financial services | 2023 |
| AH Ibuilds Ltd | Real estate | 2024 |
| AH Icare Limited | Health & social care | 2016 |
| AH Premium UK Ltd | Wholesale & retail | 2023 |
| AHC Services Ltd | Other services | 2024 |
| AHD Investments (NW) Ltd | Real estate | 2026 |
| AHD Pharma Ltd | Health & social care | 2025 |
| Ahdss Ltd | Wholesale & retail | 2024 |
| AHF HW CIC | Health & social care | 2018 |
| Ahhh Trading Ltd Limited | Manufacturing | 2022 |
| AHK Plastics & Hardware Ltd | Construction | 2024 |
| AHK Windows & Doors Ltd | Construction | 2020 |
| Ahma Fashion Ltd | Wholesale & retail | 2024 |