| Acaj Ltd | Milton Keynes | 2008 |
| Acall Holdings | Edinburgh | 2022 |
| Acanthus Interior Design Limited | Brentwood | 2008 |
| Acanthus Limited | Basingstoke | 2018 |
| Acantus Property Limited | London | 2012 |
| Acara Limited | Chichester | 2023 |
| Acaster Malbis Community Events Ltd | Wakefield | 2020 |
| Acatcalledfrank Ltd | Leeds | 2014 |
| Acatch Environmental & Property Services Ltd | Ayr | 2017 |
| ACB Cosmetics Ltd | Ripley | 2019 |
| ACB Coaching Limited | Tring | 2014 |
| ACB Software Ltd | Blackpool | 2012 |
| ACB Stunts Limited | Bedford | 2020 |
| Acbbas Limited | Bournemouth | 2019 |
| Acbeautyxo Ltd | London | 2026 |
| Acbs Care Limited | Havant | 2009 |
| ACC Aviation Group Limited | Weybridge | 2014 |
| ACC Hair & Beauty Limited | Eastleigh | 2018 |
| ACC Hair Ltd | Derby | 2019 |
| Acca FG Limited | Hitchin | 2025 |
| Acca Global Limited | London | 2018 |
| Acca House Limited | Hitchin | 2024 |
| Accedor Limited | London | 2017 |
| Accelerate Fitness Limited | London | 2023 |
| Accelerate Graphics (UK) Limited | Maldon | 2000 |
| Acceleratech Ltd | London | 2025 |
| Accelerated Media UK Limited | Seaham | 2023 |
| Accelerated Payments UK Limited | Milton Keynes | 2019 |
| Accelerateher Limited | Edinburgh | 2012 |
| Acceleration Driver Development Ltd | Cirencester | 2010 |
| Accelerator Marine Ltd | Bromley | 2023 |
| Accelerator Solutions Limited | Bristol | 2000 |
| Accendo Supplies Ltd | London | 2020 |
| Accent Group Pension Trustees Limited | Bradford | 1992 |
| Accent Holdings Limited | Steventon | 2016 |
| Accent Relocation Limited | Basingstoke | 2012 |
| Accentis Ltd. | London | 2002 |
| Accentuate Hair & Beauty Group Ltd | Hemel Hempstead | 2025 |
| Accentuate North East Ltd | Newcastle Upon Tyne | 2006 |
| Access (Steeplejacks) Limited | Batley | 2009 |
| Access Advisory Solutions Ltd | Aberdeen | 2025 |
| Access Arboriculture Limited | Norwich | 2014 |
| Access Broadcasting Limited | London | 2019 |
| Access Care Mobility Limited | Nottingham | 2016 |
| Access Christian Mediation Ltd | Taunton | 2021 |
| Access Community Trust | Norwich | 2010 |
| Access Control Automation Limited | West Sussex | 1999 |
| Access Control Services Limited | Kent | 1993 |
| Access Denied Auto Locksmith Ltd | Halifax | 2024 |
| Access Dorset Ltd | Bournemouth | 2010 |
| Access Education Group Limited | Manchester | 2005 |
| Access Everywhere Limited | London | 2017 |
| Access Fintech (UK) Ltd | London | 2018 |
| Access Flooring Association Limited | Hull | 1987 |
| Access Fulfilment Ltd | Ashford | 2014 |
| Access Horizons Ltd | Sheffield | 2018 |
| Access Image Security Limited | Solihull | 2018 |
| Access Immigration Ltd | London | 2019 |
| Access in Mind Limited | Windsor | 2025 |
| Access Industry Forum Limited | London | 2005 |
| Access Learning and Development Ltd | Manchester | 2009 |
| Access Lofts Group Limited | Stockton-On-Tees | 2014 |
| Access Logistics (UK) Limited | London | 2001 |
| Access Media Adventure Ltd | Newry | 2023 |
| Access Mentors Ltd | Cardiff | 2020 |
| Access My Beauty Ltd | London | 2020 |
| Access Personal Checking Services Ltd | Wirral | 2010 |
| Access Repairs Ltd | Walsall | 2006 |
| Access Scaffold Ltd | Bridgend | 2016 |
| Access Services Ltd | Liverpool | 2015 |
| Access Services North West Limited | Manchester | 2015 |
| Access Services Pro Ltd | London | 2025 |
| Access Speech and Language Therapy Ltd | Sawbridgeworth | 2017 |
| Access the Music Limited | Leeds | 2021 |
| Access to Work Wellbeing Ltd | Kingswinford | 2024 |
| Access Training Group Ltd | Fareham | 2024 |
| Access UK Group Ltd | Stockton-On-Tees | 2025 |
| Access UK Tickets Limited | London | 2025 |
| Access Ventures Ltd | London | 2026 |
| Access Worldwide Solutions Ltd | London | 2010 |
| Access Your Life Ltd | Aylesford | 2018 |
| Accessibility Matters (Nottingham) CIC | Nottingham | 2024 |
| Accessibility Matters Ltd | Nottingham | 2024 |
| Accessible Chair Yoga CIC | St Albans | 2017 |
| Accessible Retail Limited | Berkshire | 2002 |
| Accessible Waterways Association CIC | Berkhamsted | 2023 |
| Accession Network Ltd | Chester | 2024 |
| Accessipool Basingstoke Ltd | Basingstoke | 2026 |
| Accessories 2 YOU Limited | Glasgow | 2001 |
| Accesssure Ltd | Heathfield | 2025 |
| Accessure Limited | Leeds | 2025 |
| Acchatwin Engineering Ltd | Westhill | 2022 |
| Accia Limited | Stevenage | 2024 |
| Accident ALL Ltd | Blackpool | 2016 |
| Accident Claims Centre (HW) Ltd | High Wycombe | 2018 |
| Accident Claims Specialists Ltd | Hastings | 2014 |
| Accident First Choice Management NI Ltd | Dungannon | 2019 |
| Accident Injury Advisory Ltd | Leeds | 2008 |
| Accident MAN Limited | Palmers Green | 2011 |
| Accident Management Direct Line Limited | Luton | 2006 |