| Acute Gardening Services Limited | Crawley | 2003 |
| Acute Management Services Limited | Wimbledon | 2011 |
| Acute Need Care and Support Limited | Warrington | 2012 |
| Acute Property Investments Ltd | London | 2022 |
| Acute Scaffold Design Ltd | Bristol | 2024 |
| Acute Surveying Ltd | London | 2025 |
| Acute Trustees Limited | Barnet | 2004 |
| Acutebookkeeping Ltd | Nottingham | 2025 |
| Acutec International Limited | Birmingham | 2009 |
| Acutech Ltd | Leamington Spa | 2024 |
| Acutely Aware Ltd | Ware | 2024 |
| Acutis Advisory Ltd | London | 2025 |
| Acuto Ltd | Bradford-On-Avon | 2024 |
| Acuturn Limited | Walsall | 2002 |
| Acutus Financial Solutions Ltd | Carnforth | 2018 |
| Acutus Laboratories Ltd | Dundonald | 2017 |
| Acutus Programme Management Limited | Hamilton | 2005 |
| Acuveritas Accountancy Ltd | Bradford | 2024 |
| Acuvia Lifesciences Ltd | London | 2019 |
| Acuwomen Limited | Tamworth | 2004 |
| ACV Accountancy Services Limited | London | 2006 |
| ACV Group Ltd | London | 2019 |
| Acvita Limited | Oxted | 2009 |
| Acvitannia Limited | London | 2003 |
| Acvlt Limited | Wimborne | 2024 |
| ACW Accountancy Ltd | Bicester | 2019 |
| ACW Accounts Limited | Folkestone | 2009 |
| ACW Advisory Ltd | Oldham | 2016 |
| ACW Analytical Ltd | Lydney | 2019 |
| ACW Associates Limited | Cambridge | 2018 |
| ACW Finance Ltd | Eastbourne | 2025 |
| ACW Garden Service (Holdings) Limited | Bingley | 2009 |
| ACW Insight Ltd | Fareham | 2024 |
| ACW Lifting Limited | Castleford | 2019 |
| ACW Medical Writing Ltd | Petersfield | 2025 |
| ACW People & Talent Consulting Limited | Ledbury | 2025 |
| ACW Product and Test Services Ltd | Dundee | 2021 |
| ACW Tullylish Ltd | Banbridge | 2025 |
| Acwa Ltd | Marlow | 2023 |
| Acwa Management Solutions Ltd | Telford | 2021 |
| Acwaterra Ltd. | Caernarfon | 2022 |
| Acwfel Limited | Leigh-On-Sea | 2012 |
| Acwire Limited | Preston | 2014 |
| Acworth & Jarvis Ltd | Bournemouth | 2005 |
| Acwts Ltd | Worksop | 2026 |
| Acww Ltd | Goole | 2025 |
| ACX Engineering Consulting Ltd | Harpenden | 2021 |
| ACX Instruments Ltd | Cambridge | 2022 |
| ACX UK Ltd | London | 2021 |
| Acxena Ltd | London | 2025 |
| Acxiom European Holdings Limited | London | 2003 |
| Acxis Limited | Romford | 2012 |
| Acxit Consultancy Limited | London | 2017 |
| Acycle Ltd | London | 2024 |
| Acyuta Ltd | Chesham | 2018 |
| ACZ Associates Limited | Chorley | 2018 |
| Aczel Partners Ltd | Burnley | 2017 |
| Aczone Consultants Ltd | Croydon | 2021 |
| AD & Co. Holdings Ltd | London | 2021 |
| AD a Tint Ltd | Ballyclare | 2025 |
| AD Accountants Ltd | Whaplode St. Catherines | 2020 |
| AD Accounting and Business Solutions Limited | Kington | 2024 |
| AD Accounting Services Ltd | London | 2020 |
| AD Active Ltd | Basildon | 2025 |
| AD Advice Ltd | Glasgow | 2026 |
| AD Advisory Ltd | York | 2017 |
| AD Advisory Services Limited | Cheadle | 2019 |
| AD Agency Directory Limited | Wembley | 2024 |
| AD Alta Advisory Limited | Watford | 2016 |
| AD Alta Learning Limited | Hailsham | 2007 |
| AD and Ascent Limited | London | 2017 |
| AD Architects Limited | | 2002 |
| AD Architecture & Visualisation Ltd | London | 2017 |
| AD Astra Accounting Limited | Harrogate | 2025 |
| AD Astra Advertising Ltd | Manchester | 2023 |
| AD Astra Advisory Ltd | London | 2026 |
| AD Astra Aero Consulting Limited | Worcester | 2018 |
| AD Astra Aviation Limited | Bristol | 2025 |
| AD Astra Cloud Services Limited | Chichester | 2024 |
| AD Astra Consultants Limited | Okehampton | 2008 |
| AD Astra Digital Limited | Harrow | 2017 |
| AD Astra Legal Limited | Carnbroe | 2018 |
| AD Astra Network Ltd | London | 2025 |
| AD Astra Z Ltd | Slough | 2021 |
| AD Atelier Group Ltd | Rochester | 2026 |
| AD Atomica Limited | London | 2025 |
| AD Aviation Service Limited | Norwich | 2018 |
| AD BAE Ltd | Twickenham | 2025 |
| AD Balance Solutions Limited | Cardiff | 2025 |
| AD Blitz Core Limited | Cardiff | 2025 |
| AD BLY Groundworks & Civil Engineering Limited | Old Knebworth | 1992 |
| AD Bookkeeping Services Limited | Bristol | 2013 |
| AD Broker Ltd | London | 2020 |
| AD Brown Medchem Consulting Limited | Deal | 2016 |
| AD Business Solutionz Limited | Bradford | 2014 |
| AD Capital Consultant Ltd | Luton | 2024 |
| AD Casa London Ltd | London | 2025 |
| AD Center Media Limited | Salford | 2024 |
| AD Chef Ltd | Potters Bar | 2024 |
| AD Circuit Ltd | London | 2026 |