| Access Direct Legal Ltd | Professional & scientific | 2017 |
| Access Door Systems Limited | Manufacturing | 1989 |
| Access Education Group Limited | Other services | 2005 |
| Access Education Network Ltd | Education | 2025 |
| Access Financial Analytics Ltd | Information & communication | 2017 |
| Access Fit CIC | Arts & recreation | 2025 |
| Access for Wigan (Holdings) Limited | Professional & scientific | 2008 |
| Access for Wigan Limited | Professional & scientific | 2008 |
| Access Group Property Services Limited | Professional & scientific | 2005 |
| Access Hire & Finance Ltd | Transport & logistics | 2004 |
| Access Identified Limited | Information & communication | 2024 |
| Access Learning and Development Ltd | Other services | 2009 |
| Access Litigation Fund LP | | 2011 |
| Access Services North West Limited | Other services | 2015 |
| Access Systems (EBT) Ltd | Information & communication | 2017 |
| Access Systems (UK) Limited | Information & communication | 2012 |
| Access to Compensation Limited | Extraterritorial | 2004 |
| Access Translation and Interpreting Ltd | Administrative & support | 2020 |
| ACCESS2SITE Ltd | Education | 2025 |
| ACCESS4LOFTS Ltd | Administrative & support | 2017 |
| Accessible Fitness Community Interest Company | Arts & recreation | 2025 |
| Accessible Office Ltd | Professional & scientific | 2019 |
| Accessible Passenger Transport Services Limited | Transport & logistics | 2003 |
| Accessible Pixels Ltd | Information & communication | 2025 |
| Accessluxe Ltd | Wholesale & retail | 2026 |
| Accessment Ltd | Education | 2025 |
| Accessories 4 YOU Limited | Wholesale & retail | 2008 |
| Accessorise Group Limited | Wholesale & retail | 2013 |
| Accessory World (GG) Limited | Wholesale & retail | 2014 |
| Accessory World (UK) Ltd | Wholesale & retail | 2014 |
| Accessory World Golders Green Limited | Wholesale & retail | 2012 |
| Accessory World Prestwich Limited | Administrative & support | 2012 |
| Accessoul Limited | Wholesale & retail | 2023 |
| Accessstack Ltd | Information & communication | 2025 |
| Accident & Injury Group (Longsight) Limited | Administrative & support | 2010 |
| Accident Advice Helpline Direct Limited | Administrative & support | 2004 |
| Accident Advice Helpline Limited | Extraterritorial | 2004 |
| Accident Advice Insurance Management Group Limited | Extraterritorial | 2004 |
| Accident Claims Lawyers Limited | Professional & scientific | 2020 |
| Accident Law Limited | Administrative & support | 2000 |
| Accismo Ltd | Professional & scientific | 2014 |
| Acclaimed Wood Ltd | Hospitality | 2024 |
| Accleaning Ltd | Administrative & support | 2025 |
| Acclimatise Group Ltd | Administrative & support | 2004 |
| Accoa International Inc Ltd | Hospitality | 2022 |
| Accommodation 4 U Limited | Real estate | 2017 |
| Accommodation for Students (Holdings) Limited | Information & communication | 2013 |
| Accommodation for Students Ltd | Information & communication | 2000 |
| Accommodation Lettings Ltd | Administrative & support | 2018 |
| Accommodation Technologies Ltd | Information & communication | 2017 |
| Accommodations Limited | Real estate | 1983 |
| ACCOMOD8 Limited | Real estate | 2020 |
| Accordant Healthcare Limited | Health & social care | 2016 |
| Account-I Limited | Professional & scientific | 2022 |
| Accountabili-Team Limited | Manufacturing | 2024 |
| Accountabull Limited | Professional & scientific | 2024 |
| Accountanc Plus Ltd | Professional & scientific | 2021 |
| Accountancy Made Easy ( P/Wich) Ltd | Professional & scientific | 2016 |
| Accountancy Made Easy (R/Dale) Ltd | Professional & scientific | 2015 |
| Accountancy Quote Limited | Other services | 2023 |
| Accountancy Risk Limited | Professional & scientific | 2020 |
| Accountancy Services 4 Business Ltd | Professional & scientific | 2011 |
| Accountancynet Ltd | Professional & scientific | 2022 |
| Accountaneers Ltd | Professional & scientific | 2024 |
| Accountant Switch Ltd | Professional & scientific | 2024 |
| ACCOUNTANT4EVERY1 Ltd | Professional & scientific | 2020 |
| Accountant@Work Ltd | Professional & scientific | 2013 |
| Accountants Manchester Ltd | Professional & scientific | 2025 |
| Accountants Online Limited | Professional & scientific | 2024 |
| Accountinax Services Ltd | Information & communication | 2018 |
| Accounting & Business Services Ltd | Professional & scientific | 2000 |
| Accounting & Tax Solutions MCR Ltd | Professional & scientific | 2020 |
| Accounting Advantage Limited | Professional & scientific | 2011 |
| Accounting Monton Village Ltd | Professional & scientific | 2025 |
| Accounting Solution Management Ltd | Professional & scientific | 2025 |
| Accounting Solution MCR Ltd | Professional & scientific | 2020 |
| Accounting Solutions (MCR) Ltd | Professional & scientific | 2020 |
| Accounting Support Services Limited | Professional & scientific | 2021 |
| Accountingin Ltd | Professional & scientific | 2025 |
| Accountiva Ltd | Real estate | 2024 |
| Accountology Ltd | Professional & scientific | 2021 |
| Accounts & Business Services Limited | Professional & scientific | 2018 |
| Accounts & Tax Advice Limited | Professional & scientific | 2018 |
| Accounts Advantage Ltd | Professional & scientific | 2011 |
| Accounts and Businesses Services Limited | Professional & scientific | 2024 |
| Accounts Direct U.K. Limited | Administrative & support | 2016 |
| Accrington Recycling Ltd | Water & waste | 2017 |
| Accrue Bookkeeping Services Ltd | Professional & scientific | 2011 |
| Acct (Altaie, Consulting, Contracting & Trading) Limited | Professional & scientific | 2010 |
| Accuframe Ltd | Construction | 2011 |
| Accugrowth Ltd | Professional & scientific | 2024 |
| ACCUMIL8 Ltd | Transport & logistics | 2025 |
| Accumulate Consulting Limited | Professional & scientific | 2013 |
| Accupart Ltd | Information & communication | 2009 |
| Accurail Ltd | Information & communication | 2020 |
| Accurate Building & Engineering Ltd | Construction | 2010 |
| Accurate Care Group Limited | Health & social care | 2024 |
| Accurate Colours and Compounds Ltd | Wholesale & retail | 2016 |
| Accurate Services Limited | Professional & scientific | 2016 |
| Accurity Ltd | Financial services | 2021 |