| Anticus Partners Limited | Barnsley | 2010 |
| Antidote Bidco Limited | Richmond | 2018 |
| Antidote BTC Ltd | London | 2024 |
| Antidote Investor Holdco Limited | Richmond | 2018 |
| Antidote Topco Limited | Richmond | 2018 |
| Antifragile Consulting Ltd | London | 2019 |
| Antigonal Ltd | London | 2025 |
| Antigua Mortgages Holdings Limited | London | 2024 |
| Antigua Mortgages PLC | London | 2024 |
| Antihero Ventures Ltd | Rossendale | 2025 |
| Antikythera Capital | Norwich | 2018 |
| Antilles Sport and Media (UK) Limited | London | 2013 |
| Antilog 2 Ltd | London | 2021 |
| Antimatter AI Labs Ltd | London | 2025 |
| Antimeo Limited | London | 2026 |
| Antin Connect Holdco 1 Limited | London | 2018 |
| Antin Connect Holdco 2 Limited | London | 2018 |
| Antin Infrastructure Partners UK Limited | London | 2013 |
| Antioch Investments Ltd | London | 2024 |
| Antipodes Partners (UK) Limited | London | 2017 |
| Antipodes Partners Management (UK) Limited | London | 2021 |
| Antique Hypermarket Holdings Limited | Birmingham | 2024 |
| Antique Paper Company Holdings Limited | Swanley | 2022 |
| Antler Energy Trading Ltd | London | 2018 |
| Antler First Holdings Limited | Watford | 2021 |
| Antler Limited | London | 2020 |
| Antler Management UK PVT Ltd | London | 2021 |
| Antler Mortgage Funding 1 Holdings Ltd | London | 2024 |
| Antler Mortgage Funding 1 PLC | London | 2024 |
| Antler Project Holdings Limited | Bagshot | 2018 |
| Antler UK Nominees Limited | London | 2021 |
| Antler Ventures UK GP I Ltd | London | 2019 |
| Antler Ventures UK GP II Limited | London | 2024 |
| Antodonis Ltd | London | 2025 |
| Antoinette Collection Ltd | London | 2026 |
| Antoma Holding Ltd | London | 2026 |
| Antoma MPA Ltd | London | 2024 |
| Anton Bridge Holdings Limited | London | 2019 |
| Anton Holding Ltd. | London | 2019 |
| Anton Intelligence Consulting Limited | Fareham | 2026 |
| Anton Investments Limited | London | 1998 |
| Anton Rosenfield Financial Planning Ltd | Poulton-Le-Fylde | 2012 |
| Anton Smith Limited | Nottingham | 2014 |
| Anton Thomas Consultancy Ltd | Ashton-Under-Lyne | 2007 |
| Antonin Ltd | London | 2024 |
| Antonine Group Ltd | Glasgow | 2025 |
| Antonine IM Holdings Ltd | Grangemouth | 2019 |
| Antonio Giovanucci ET CIE Ltd | London | 2016 |
| Antoniou Holdings Ltd | East Grinstead | 2026 |
| Antony & Co Holding Ltd | Sutton Coldfield | 2023 |
| Antony a Residential Limited | London | 2011 |
| Antony Bennett Holdings Limited | Bury | 2012 |
| Antony Dickson Ltd | Brough | 2011 |
| Antony Flynn Limited | Skelmersdale | 2019 |
| Antony Pedalino Maconnerie Couverture Ltd | London | 2023 |
| Antony Ransom Independent Financial Adviser Limited | Ilkley | 2004 |
| Antony Sutton Ltd | Leicester | 2022 |
| Antony Wade Consulting Ltd | London | 2021 |
| Antor Holdings Ltd | Stockport | 2026 |
| Antra Holdings Ltd | Woking | 2022 |
| Antracite Investment Limited | London | 2014 |
| Antrak Limited | Cheltenham | 2010 |
| Antrams Limited | Brighton | 2021 |
| Antrams Wealth Management Ltd | Brighton | 2010 |
| Antrim Energy Group Ltd | Ballymena | 2026 |
| Antrim Energy Ltd | Ballymena | 2026 |
| Antrim Estates (N.I.) Limited | Portrush | 2010 |
| Antur Fawr Holdings Ltd | London | 2018 |
| Antwerp House Group Ltd | Baldock | 2025 |
| ANU Express Ltd | Slough | 2009 |
| Anubis Capital Management Limited | London | 2022 |
| Anubis Wind Company Limited | London | 2022 |
| Anugaman Holding Ltd | Nottingham | 2025 |
| Anuhill Holdings Ltd | Loughborough | 2025 |
| Anujit Solutions Limited | London | 2021 |
| Anuk Trading Services Limited | Ilford | 2025 |
| Anum Cara Holdings Limited | Kilkeel | 2025 |
| Anunnaki Group Limited | London | 2022 |
| Anusabi Holdings Limited | London | 2025 |
| Anuva Brand Ltd | Lincoln | 2025 |
| Anuyam Limited | London | 2021 |
| Anuza Group Ltd | Stockport | 2026 |
| ANV Corporate Name Limited | London | 2008 |
| ANV Global Services Ltd | London | 2011 |
| ANV Group Holdings Ltd. | London | 2025 |
| ANV Group Ltd | Northampton | 2020 |
| Anvee Limited | Birmingham | 2018 |
| Anvenna Group Limited | Bury St. Edmunds | 2025 |
| Anveshan Ventures Limited | Beverley | 2025 |
| Anvil Point Asset Management Ltd | Bournemouth | 2026 |
| Anvil Steels (Sandwell) Holdings Limited | West Bromwich | 2021 |
| Anville Investments Limited | London | 2016 |
| ANW Holdings Ltd | Manchester | 2018 |
| Anwar Brothers Limited | Richmond | 2007 |
| Anwar Group Holdings Ltd | Slough | 2024 |
| Anwar Medical Holdings Ltd | Burnley | 2020 |
| Anwar Security Protection Ltd | London | 2023 |
| Anwar Spine and Investment Limited | Northwood | 2023 |
| Anwen Investments Limited | Darlington | 2024 |
| Anwyl Investments Limited | Shrewsbury | 2025 |