| Acastus Limited | Henley-On-Thames | 2024 |
| Acat Group Ltd | Edgware | 2021 |
| ACB QA Ltd | Cardiff | 2025 |
| Acba Ltd | St Austell | 2010 |
| ACC Associates Limited | Calne | 2006 |
| ACC Commercial Limited | Congleton | 2025 |
| ACC Equity Ltd | Solihull | 2025 |
| ACC Holdings Limited | London | 2017 |
| ACC Mortgages Limited | Congleton | 2017 |
| ACC Training Solutions Ltd | Mildenhall | 2015 |
| ACC UK Insurance Services Limited | Ashford | 2005 |
| Acca Group Limited | Hitchin | 2020 |
| Accalon Associates Limited | Hockliffe | 2002 |
| Accarry Limited | London | 2024 |
| Accaya Holdings Limited | London | 2023 |
| Accel Holdings Ltd | London | 2020 |
| Accel Partners Limited | London | 2000 |
| Acceladus Holdings Ltd | Dundee | 2025 |
| Accelebate Ltd | London | 2020 |
| Accelerant Agency (UK) Limited | London | 2018 |
| Accelerant Holdings UK Ltd. | London | 2019 |
| Accelerant Insurance UK Limited | London | 1997 |
| Accelerant Services UK Limited | London | 2018 |
| Accelerant Underwriting Holdings UK Limited | Glasgow | 2006 |
| Accelerate (*a & BC) Limited | Braintree | 2020 |
| Accelerate 42 Ltd | Eastleigh | 2026 |
| Accelerate Financial Services Ltd. | Uxbridge | 2023 |
| Accelerate Financial Solutions Ltd | Uttoxeter | 2024 |
| Accelerate Iberia Esports Holdings Ltd | Guildford | 2026 |
| Accelerate Property Feeder Ltd | London | 2015 |
| Accelerate Team Ltd | Oakham | 2022 |
| Accelerate Underwriting Limited | London | 2015 |
| Accelerate Ventures Limited | London | 2007 |
| Accelerated Bridging Finance Limited | Bolton | 2006 |
| Accelerated Finance Ltd. | Edgware | 2018 |
| Accelerated Ownership Ltd | London | 2019 |
| Acceleration Properties Limited | Portadown | 2001 |
| Accelerator Advisory Limited | Cambridge | 2019 |
| Acceleris Limited | Greater Manchester | 2000 |
| Acceleron V Ltd | Birmingham | 2020 |
| Accelya Global Limited | London | 2014 |
| Accendo Holdings Ltd | Barnet | 2015 |
| Accendo Markets Limited | Barnet | 2007 |
| Accent Capital Management Limited | London | 2021 |
| Accent Capital PLC | Bradford | 2019 |
| Accent Financial Planning Limited | Bristol | 2023 |
| Accent Group Holdings Limited | Gerrards Cross | 2026 |
| Accent Partners Limited | Southfleet | 2021 |
| Accentua Group Limited | Swindon | 2021 |
| Accentuate Group Ltd | Norwich | 2019 |
| Accentuate Holdings Limited | Wimborne | 2015 |
| Accept Car Credit Limited | Elland | 2004 |
| Accept Cards Limited | Elland | 2017 |
| Acceptacard Limited | Northampton | 2009 |
| Accepted INS Ltd | Polegate | 2022 |
| Accepted Money Ltd | Doncaster | 2019 |
| Accepted Property Group Ltd | Morley, Leeds | 2024 |
| Access - the Foundation for Social Investment | London | 2014 |
| Access 14 Limited | Leeds | 2018 |
| Access 2 Funding Limited | Erdington | 2013 |
| Access 4 Finance Limited | Rotherham | 2010 |
| Access AUD Ltd | Loughborough | 2021 |
| Access Bridging Finance Limited | Barnet | 2006 |
| Access Bureau Limited | Westerham | 2012 |
| Access Business Capital UK Ltd | Bournemouth | 2017 |
| Access Business Credit Limited | London | 2024 |
| Access Business Finance and Consultancy Ltd | Barry | 2014 |
| Access Business Finance Ltd | Bedford | 2021 |
| Access Capital Partners (UK) Limited | London | 2012 |
| Access Capital Partners Advisor UK Limited | Manchester | 2005 |
| Access Commercial Finance Limited | Birmingham | 2014 |
| Access Commercial Investors 1 Limited | Sheffield | 2015 |
| Access Commercial Investors 3 Limited | Leeds | 2016 |
| Access Commercial Investors 4 PLC | Birmingham | 2017 |
| Access Commercial Investors 5 Limited | Leeds | 2018 |
| Access Commercial Lending Limited | Sheffield | 2016 |
| Access Commercial Ltd | Wimborne | 2013 |
| Access Commodity Management Limited | London | 2012 |
| Access Corporate Finance Partners Limited | London | 2016 |
| Access Credit Control Ltd | Sheffield | 2011 |
| Access Credit Limited | London | 2024 |
| Access Direct (IFA) Ltd | London | 2004 |
| Access Direct Financial Services Ltd | Bushey | 1999 |
| Access Equity Management Limited | London | 2000 |
| Access Fertility Bidco Limited | Rushden | 2019 |
| Access Fertility Topco Limited | Rushden | 2019 |
| Access Finance Limited | Aldermaston | 2017 |
| Access Financial Consultancy Limited | Withernsea | 2018 |
| Access Financial Services Limited | Milton Keynes | 2002 |
| Access First LEI Limited | Altrincham | 2012 |
| Access Floors (Holdings) Limited | Hereford | 2014 |
| Access Franchise Management Limited | Swindon | 1957 |
| Access Green Limited | Billericay | 2015 |
| Access Group London Ltd | Harrow | 2023 |
| Access Holdings (South West) Ltd | St. Austell | 2025 |
| Access Infrastructure Group Ltd | Fareham | 2024 |
| Access Media Advisory Limited | Rochester | 2003 |
| Access Money (Group) Limited | Rotherham | 2020 |
| Access Mortgages (Scotland) Limited | Glasgow | 2002 |
| Access NRI Consultancy PVT. Limited | Bristol | 2021 |