| Aever Clinics UK Ltd | London | 2026 |
| AEW Architects Limited | Manchester | 2010 |
| AEW Electrical Ltd | Margate | 2011 |
| AEW Management Limited | Manchester | 2012 |
| AEW Promote LP Limited | London | 2003 |
| AEW UK Reit 2015 Limited | London | 2015 |
| Aeyglom Limited | London | 2022 |
| AF Axhome-Tec SA / Ltd | London | 2014 |
| AF Dundee Limited | Edinburgh | 2017 |
| AF Pearson Consultants Ltd | Wetherby | 2024 |
| AF Services Limited | Tamworth | 2016 |
| AFA Solutions Limited | Chesterfield | 2011 |
| Afar Process Control Ltd | Beckenham | 2017 |
| AFB Projects Limited | Batley | 2022 |
| AFC Accountancy Services Limited | Bristol | 2012 |
| Afds International Limited | Cardiff | 2019 |
| AFE Online Limited | Long Eaton | 1958 |
| Afeni Limited | Corsham | 2025 |
| Affaible Ltd | Swindon | 2024 |
| Affaires Ltd | Manchester | 2025 |
| Affaric Limited | Nottingham | 1990 |
| Affiliate PSG Ltd | London | 2025 |
| Affinia Corporate Finance Limited | London | 2024 |
| Affinity (Overseas) Limited | Beckenham | 2006 |
| Affinity 2000 Limited | New Malden | 1996 |
| Affinity Accountants Limited | Middlesex | 2024 |
| Affinity Asset Management Ltd | Canterbury | 2014 |
| Affinity Befriending Company Ltd | Greenock | 2025 |
| Affinity Care Limited | Poole | 2002 |
| Affinity EV Limited | Poole | 2025 |
| Affinity Financial Group Limited | Westcliff On Sea | 2020 |
| Affinity for YOU Ltd | Londonderry | 2020 |
| Affinity Legacy Planning Holdings Limited | London | 2013 |
| Affinity New Homes Limited | Aylesbury | 2009 |
| Affinity News Limited | Ballymoney | 2012 |
| Affinity Plus Ltd | Walsall | 2023 |
| Affinity Resource Management Ltd | St Ives | 2018 |
| Affinity Solutions Ltd | Cleethorpes | 2017 |
| Affinity Sounds Ltd | Romford | 2024 |
| Affluent Tax & Accounting Services Ltd | Bridge Of Weir | 2005 |
| Affluent Trustees Limited | Bridge Of Weir | 1998 |
| Afford Bond Audit Limited | Nantwich | 2013 |
| Afford Bond Group Limited | Nantwich | 2018 |
| Afford Bond Tax Limited | Nantwich | 2013 |
| Afford Rent a Car Limited | Stoke-On-Trent | 2017 |
| Affordable Choices Limited | Driffield | 2002 |
| Affordable Colour Print Ltd | Leigh-On-Sea | 2015 |
| Affordable Goods Ltd | Bradford | 2025 |
| Affordable Housing Limited | Watford | 2002 |
| Affordable Kitchens & Bathrooms Accessories Limited | Balgownie Road, Bridge Of Don | 2010 |
| Affordable Kitchens Limited | Bromsgrove | 1999 |
| Affordable Mortgages Limited | Chesterfield | 2024 |
| Affordable Mortgages.Co.Uk Limited | Chesterfield | 2023 |
| Affordable Philanthropy Limited | London | 2020 |
| Affordable Tyres 2U Ltd | Bridgend | 2023 |
| AFG Autoparts Industrial Ltd | Beckenham | 2014 |
| AFG Cook Limited | Long Eaton | 1967 |
| AFG Manufacturing Limited | Long Eaton | 1948 |
| AFG Nominees Limited | Long Eaton | 1921 |
| AFG Property Management Limited | Long Eaton | 1965 |
| AFG U.K. Limited | Long Eaton | 1939 |
| Afghanaid | London | 1995 |
| Afgolf Store Limited | Bedford | 2025 |
| AFI Aerial Platforms Limited | Normanton | 2006 |
| AFI Group Limited | Normanton | 1974 |
| Afina Management Solutions Ltd | London | 2014 |
| Afinan UK Limited | Blackpool | 2017 |
| Afinbe Ltd | Darwen | 2023 |
| Afini Ltd | Bristol | 2023 |
| Afishal Productions Limited | Aylesbury | 2021 |
| AFL Technology Co., Limited | Beckenham | 2014 |
| AFL TEX Sourcing Limited | Ilford | 2012 |
| Aflow Valve Co., Ltd | Beckenham | 2014 |
| AFM Group Solutions Limited | Aldershot | 2021 |
| AFM Solutions (2021) Limited | Aldershot | 2021 |
| AFM SPV NO.1 Limited | Aldershot | 2012 |
| Afo-Cast Limited | London | 2017 |
| Afon Electrical & Renewables Ltd | Salisbury | 2024 |
| Afon Llan Limited | Swansea | 2023 |
| AFP Building Solutions Ltd | Liverpool | 2025 |
| AFP Childcare Limited | Beaconsfield | 2015 |
| Afraid of the Dark Ltd | Colchester | 2026 |
| Africa Economic Forum | Cardiff | 2019 |
| Africa Energy and Finance Ltd | London | 2016 |
| Africa Legal Risk Control Ltd | Cardiff | 2015 |
| Africa Rabbit Co., Limited | Cardiff | 2021 |
| Africa Roofing UK Ltd | Leek | 2014 |
| Africagri.Ci Ltd | Croydon | 2010 |
| African Auro-Cupric Holdings Limited | London | 2018 |
| African Battery Metals Limited | London | 2019 |
| African Caribbean Insurance Network Recruit Ltd | London | 2020 |
| African Development Centre Ltd | Northwich | 2013 |
| African Indigo Ltd | Luton | 2020 |
| African Mangrove Foundation | London | 2022 |
| African Mining & Exploration Limited | London | 2013 |
| African Promise | London | 2016 |
| African Soccer Limited | London | 2004 |
| African Supplies Ltd | Hemel Hempstead | 2025 |
| Africanfire Limited | Cambridge | 2007 |
| Africaunlimited Limited | Ruislip, | 2024 |