| ACA Joinery Limited | Construction | 2015 |
| ACA Property MGT Ltd | Real estate | 2019 |
| ACA Spirit Limited | Wholesale & retail | 2018 |
| Acacia Centre Limited | Arts & recreation | 2010 |
| Acacia Hair Salon Limited | Other services | 2014 |
| Acacia Partnership Trust | Other services | 2008 |
| Acacia Tree Homes Ltd | Real estate | 2020 |
| Academe Roofing Services Limited | Construction | 2003 |
| Academic Engineers Ltd | Professional & scientific | 2025 |
| Academic Solutions (DW) Limited | Professional & scientific | 2004 |
| Acahive Ltd | Education | 2026 |
| Acapo Holdings Ltd | Financial services | 2021 |
| ACB Property Holdings Ltd | Real estate | 2025 |
| ACB Property Services Ltd | Real estate | 2022 |
| ACB UK Consulting Ltd | Professional & scientific | 2026 |
| Accalaide Limited | Construction | 2011 |
| Acce Holdings Ltd | Real estate | 2021 |
| Accelerate Agency Ltd | Professional & scientific | 2017 |
| Accelerate Quality Consultants Limited | Professional & scientific | 2022 |
| Accell UK & Ireland Ltd | Wholesale & retail | 1915 |
| Accendo Marketing Ltd | Professional & scientific | 2017 |
| Accent Voice & Data Limited | Information & communication | 2003 |
| Access ALL Productions Ltd | Information & communication | 2023 |
| Access Care Mobility Limited | Other services | 2016 |
| Access Health Care Solution Limited | Administrative & support | 2020 |
| Access Intelligent Services Limited | Information & communication | 2008 |
| Access Service and Repair Limited | Manufacturing | 2008 |
| Access Social Care Ltd | Health & social care | 2020 |
| Access Training (East Midlands) Ltd | Education | 2005 |
| ACCESS24 Care Services Ltd | Health & social care | 2026 |
| ACCESS24 Security Services Ltd | Administrative & support | 2026 |
| Accessibility Matters (Nottingham) CIC | Other services | 2024 |
| Accessibility Matters Ltd | Other services | 2024 |
| Accessible Marketing Collective Ltd | Information & communication | 2024 |
| Accessus Chat Limited | Professional & scientific | 2024 |
| Accessus Connect Limited | Professional & scientific | 2024 |
| Accessus Consult Limited | Professional & scientific | 2024 |
| ACCEXX247 Ltd | Information & communication | 2024 |
| Accident Assist Nottingham Limited | Professional & scientific | 2012 |
| Accident Solutions Nottingham Limited | Financial services | 2012 |
| Accio Finance Ltd | Financial services | 2019 |
| Accio Group (Holdings) Ltd | Financial services | 2025 |
| Accord ASC Limited | Professional & scientific | 2023 |
| Accordeus Group Limited | Professional & scientific | 2016 |
| Accountancy & Finance Personnel Limited | Administrative & support | 2007 |
| Accountancy Outsourcing Services (AOS UK) Limited | Information & communication | 2026 |
| Accountants 4 U (UK) Limited | Professional & scientific | 2013 |
| Accountants Nottingham Ltd | Professional & scientific | 2025 |
| Accounting and Business Management Consultancy Ltd | Professional & scientific | 2013 |
| Accounting Services (DB) Limited | Professional & scientific | 2015 |
| Accounting Solutions (AS) Ltd | Professional & scientific | 2014 |
| Accounting Solutions (GB) Limited | Professional & scientific | 2009 |
| Accounting Solutions and Management Limited | Professional & scientific | 2014 |
| Accounting Synergy Ltd | Professional & scientific | 2016 |
| Accra Makola Market Ltd | Wholesale & retail | 2023 |
| Accredo Financial Services Limited | Financial services | 2014 |
| Accubridge Consulting Group Ltd | Professional & scientific | 2023 |
| Accufine Ltd | Hospitality | 2016 |
| Accuro Affairs Limited | Professional & scientific | 2024 |
| Accuro Consulting Limited | Professional & scientific | 2015 |
| ACD Financial Consulting Limited | Professional & scientific | 2019 |
| ACD Property Services Ltd | Real estate | 2019 |
| Acdc Consulting Ltd | Professional & scientific | 2013 |
| Ace 1-2-1 Ltd | Professional & scientific | 2017 |
| Ace 68 Limited | Real estate | 2025 |
| Ace Care 4 U Limited | Health & social care | 2011 |
| Ace Care Living Ltd | Administrative & support | 2026 |
| Ace Catering Online Ltd | Wholesale & retail | 2018 |
| Ace Clean & Maintenance Limited | Administrative & support | 2021 |
| Ace Drywall (Nottingham) Ltd | Construction | 2022 |
| Ace Electrical (Midlands) Limited | Construction | 2021 |
| Ace Finishes (Nottingham) Ltd | Construction | 2022 |
| Ace Instalations Ltd | Construction | 2025 |
| Ace Installations Ltd | Construction | 2016 |
| Ace IT Limited | Information & communication | 2023 |
| Ace Machines Limited | Manufacturing | 2018 |
| Ace Nottingham Group Limited | Construction | 2019 |
| Ace of Mansfield Limited | Transport & logistics | 1979 |
| Ace of Trades TCG Ltd | Wholesale & retail | 2026 |
| Ace Property Notts Ltd | Real estate | 2023 |
| Ace Shots Ltd | Hospitality | 2026 |
| Ace Solar Ltd | Construction | 2010 |
| Ace Sourcing Limited | Wholesale & retail | 2008 |
| Ace Sports Midlands Ltd | Health & social care | 2022 |
| Ace Tech Foundation CIC | Information & communication | 2024 |
| Ace Tennis Balls Limited | Wholesale & retail | 2016 |
| Ace Tyres Barlane Ltd | Wholesale & retail | 2024 |
| Ace-Abc (Mansfield) Limited | Extraterritorial | 1999 |
| Ace-Ceutics & Services GB Limited | Professional & scientific | 2021 |
| ACE26M Holdings Ltd | Real estate | 2026 |
| Acecareathome Limited | Health & social care | 2026 |
| Acefast Limited | Information & communication | 2003 |
| Acefs Services Limited | Administrative & support | 2023 |
| Aceington Services Limited | Financial services | 2012 |
| Acemarket 07 Ltd | Wholesale & retail | 2020 |
| Acer Electrical Systems Limited | Manufacturing | 2011 |
| Acer House Investments Limited | Financial services | 2019 |
| Acer Property Services Ltd | Administrative & support | 2025 |
| Acer Renovations (Midlands) Limited | Construction | 2021 |
| Acesupport Limited | Health & social care | 2025 |