| Accountants Bolton Ltd | Bolton | 2018 |
| Accounting & Tax Planning UK Limited | London | 2015 |
| Accounting Automated Ltd | Glasgow | 2023 |
| Accounting Consultancy Services Ltd | Wolverhampton | 2017 |
| Accounting Holding Ltd | Milton Keynes | 2024 |
| Accountingaid Limited | Uxbridge | 2025 |
| Accounts and Bookkeeping Ltd | Kington | 2007 |
| Accounts Center Limited | Essex | 2001 |
| Accounts Tax and VAT Limited | Borehamwood | 2006 |
| Accountscom Limited | Redditch | 2014 |
| Accouter Holdings Limited | Canterbury | 2024 |
| Accp (London) Limited | Harrow Weald, | 2013 |
| Accredited Insurance (UK) Limited | London | 2023 |
| Accredo Financial Services Limited | Nottingham | 2014 |
| Accredo Group Limited | Haywards Heath | 2020 |
| Accredo Secured Business Finance Limited | Haywards Heath | 2014 |
| Accretio Partners Limited | London | 2023 |
| Accretion Holdings Ltd | London | 2025 |
| Accretus Limited | London | 2025 |
| Accrofab Holdings Limited | Derby | 2023 |
| Accrofab Investments Limited | Derby | 2023 |
| Accru Partners UK Ltd | Bristol | 2024 |
| Accrue Investment Management Limited | Bath | 2001 |
| Accrue Limited | Bath | 2001 |
| Accrue Nominees (Exempt) Limited | Bath | 2000 |
| Accrue Nominees Limited | Bath | 2000 |
| Accrued Group Limited | Burnley | 2021 |
| Accruent UK Holdings Limited | London | 2017 |
| Accsis Limited | Chelmsford | 2025 |
| Accter Limited | Cheam | 2018 |
| Acctive Systems Holdings Limited | Edenbridge | 2023 |
| Acctp Brum Holdco Ltd | London | 2024 |
| Acctp Brum Propco Ltd | London | 2024 |
| Accu Group Limited | Huddersfield | 2024 |
| Accudo Investments Limited | Southsea | 2005 |
| Accugas Holdings UK PLC | London | 2019 |
| Accugas UK Limited | London | 2019 |
| Accuma Financial Planning Limited | Northampton | 2016 |
| Accumulate Wealth Management (Kent) Ltd | Barnet | 2013 |
| Accumulate Wealth Management Group Limited | Cambridge | 2015 |
| Accumulation Ltd | London | 2023 |
| Accumulative Limited | Wilmslow | 2017 |
| Accumulus Consulting Limited | Weybridge | 2001 |
| Accumulus Wealth Management Limited | Weybridge | 2016 |
| Accur Capital Ltd | Mildenhall | 2022 |
| Accura Capital Ltd | Birmingham | 2016 |
| Accuracy Consultancy Limited | London | 2026 |
| Accuracy Holdings Ltd | London | 2026 |
| Accuratax Ltd | London | 2024 |
| Accurate Advisors Limited | London | 2017 |
| Accurate Section Benders Holdings Limited | Kingswinford | 2025 |
| Accurate Survey’S Limited | Bournemouth | 2022 |
| Accurate TOO Invest Ltd | Pencoed, Bridgend | 2009 |
| Accuratio Holdings Limited | Chorley | 2024 |
| Accuratus Group Ltd | Kingsley | 2026 |
| Accuris Global Limited | Milton Keynes | 2023 |
| Accurity Ltd | Manchester | 2021 |
| Accuro Fiduciary Limited | London | 2015 |
| Accuro Fiduciary Services Limited | London | 2013 |
| Accuro Risk Management Limited | London | 2016 |
| Accuro Underwriting Ltd | Neston | 2000 |
| Accurocare (Management) Limited | Aylesbury | 2023 |
| Accurocare Holdings Limited | Haddenham | 2019 |
| Accuweb Holding Ltd | Brighton | 2021 |
| Accx Capital Markets Limited | London | 2022 |
| ACD Group Limited | Aldridge | 2022 |
| Acdc Pharma Ltd | Belfast | 2024 |
| Acdc S&L Holdings Ltd | Birmingham | 2025 |
| Acdps Holdings Limited | Wolverhampton | 2018 |
| Ace & Sons Limited | Leicester | 2021 |
| Ace & Spin Investment Limited | Luton | 2026 |
| Ace 1J Ltd | Mitcham | 2023 |
| Ace 2024 Ltd | Sheffield | 2024 |
| Ace 21 Holdings Ltd | Newbury | 2018 |
| Ace 3 Holdings Limited | Holt | 2019 |
| Ace 4 Holdings Limited | Wokingham | 2022 |
| Ace 8 Ltd | Mitcham | 2025 |
| Ace Adaptations Ltd | Skelmersdale | 2023 |
| Ace Arborist Ltd | London | 2025 |
| Ace ARC Holdings Limited | Leicester | 1986 |
| Ace Associates Group Entity (Ace AGE) Limited | London | 2023 |
| Ace Bidco Limited | West Kirby | 2018 |
| Ace Brokers Ltd | Pinner | 2012 |
| Ace Business Finance Limited | Milton Keynes | 2021 |
| Ace Buyout IV CLA Nominees Limited | St Albans | 2022 |
| Ace Capital Group Ltd | London | 2018 |
| Ace Capital Holdings Ltd | London | 2026 |
| Ace Coffee and Bagel Limited | Peterborough | 2018 |
| Ace Connections (East) Holdings Ltd | Ely | 2025 |
| Ace Corp Holdings Ltd | Pontypool | 2022 |
| Ace Credit Exchange Limited | London | 2015 |
| Ace Elements UK Ltd | Chippenham | 2025 |
| Ace Essential Supplies Holdings Limited | Cardiff | 2022 |
| Ace Estimating Limited | Upminster | 2013 |
| Ace Finance and Developments Ltd | Stanmore | 2018 |
| Ace Finance Ltd | London | 2025 |
| Ace Financial Advisers Limited | Lincolnshire | 2006 |
| Ace Financial Planning Limited | Bushey | 2004 |
| Ace Financial Solutions Limited | London | 2010 |
| Ace Financials Ltd | Feltham | 2025 |