| Acaca Ltd | Real estate | 2021 |
| Acacia Catering Magagement (UK) Limited | Hospitality | 2024 |
| Acacia Spring Properties Ltd | Energy | 2025 |
| Acadamis Ltd | Information & communication | 2021 |
| Academe IT Limited | Information & communication | 2018 |
| Academia Motors Ltd | Wholesale & retail | 2025 |
| Academic Aces Ltd | Other services | 2022 |
| Academic Enrichment Learning Ltd | Education | 2020 |
| Academic Excellence Consultancy and Tutoring Ltd | Education | 2025 |
| Academic Excellence Ltd | Education | 2012 |
| Academic Learning Academy Ltd | Education | 2024 |
| Academic Quality Management UK Ltd | Education | 2026 |
| Academic Recruitment Ltd | Professional & scientific | 2024 |
| Academic Research Knowledge Exchange Ltd | Education | 2023 |
| Academies (Australia) Ltd | Administrative & support | 2010 |
| Academy (Midlands) Limited | Professional & scientific | 2004 |
| Academy Consultation Ltd | Wholesale & retail | 2021 |
| Academy Investment Group Limited | Financial services | 2024 |
| Academy of Business Finance and Accounting Ltd | Other services | 2026 |
| Academy of Homeopathy & Holistic Therapies-(A.H.H.T). Ltd | Manufacturing | 2025 |
| Academy of Light AOL Ltd | Education | 2021 |
| Academy of Martial Arts Birmingham UK Limited | Arts & recreation | 2018 |
| Academy Signs Holdings Limited | Manufacturing | 1995 |
| Academy Signs Limited | Manufacturing | 1992 |
| Acadicare Ltd | Administrative & support | 2025 |
| Acai Life Limited | Wholesale & retail | 2019 |
| Acai Ventures Ltd | Financial services | 2026 |
| Acasa Solutions Ltd | Wholesale & retail | 2024 |
| ACB Motor Repairs Ltd | Wholesale & retail | 2025 |
| Acc-Q-Mix Limited | Wholesale & retail | 2006 |
| Acc-Unique Solutions Ltd. | Professional & scientific | 2007 |
| Accara Partnerships Ltd | Hospitality | 2025 |
| Accecor Interiors Ltd. | Professional & scientific | 2017 |
| ACCELER8 Driving Academy Limited | Education | 2018 |
| Accelerate Mechanical Services Ltd | Wholesale & retail | 2020 |
| Accelerate Service Group Ltd | Construction | 2019 |
| Accelerate Tuition Ltd | Education | 2023 |
| Accelerated Maintenance Services Limited | Wholesale & retail | 2023 |
| Accelerated Style Limited | Professional & scientific | 2020 |
| Acceleron V Ltd | Financial services | 2020 |
| Accendo Assets Ltd | Real estate | 2018 |
| Accent Personnel Ltd | Construction | 2022 |
| Accentuate Ltd | Professional & scientific | 2020 |
| Accept My Delivery Ltd | Wholesale & retail | 2018 |
| Access Accountants Ltd | Professional & scientific | 2021 |
| Access Anchors Ltd | Construction | 2021 |
| Access and Dock Ltd | Professional & scientific | 2024 |
| Access Commercial Finance Limited | Financial services | 2014 |
| Access Commercial Investors 4 PLC | Financial services | 2017 |
| Access Finance Solutions Ltd | Administrative & support | 2018 |
| Access Further Education Limited | Education | 1992 |
| Access Housing & Support Limited | Hospitality | 2016 |
| Access Integration Limited | Administrative & support | 2024 |
| Access IT Solutions (UK) Limited | Information & communication | 2012 |
| Access Progress Technologies Ltd | Information & communication | 2023 |
| Access Skills Academy Limited | Administrative & support | 2006 |
| Access Skills Ltd | Education | 2008 |
| Access West Midlands CIC | Health & social care | 2021 |
| Accessible Events Show Ltd | Administrative & support | 2026 |
| Accessory Haven Ltd | Wholesale & retail | 2025 |
| Accident & Injury Associates Limited | Financial services | 2011 |
| Accident Assist Yorkshire Ltd | Transport & logistics | 2025 |
| Accident Claims Team Limited | Administrative & support | 2002 |
| Accident Direct Claims Limited | Financial services | 2012 |
| Accident Exchange Limited | Administrative & support | 2001 |
| Acciso Ltd | Health & social care | 2014 |
| Acclaimed Builders & Refurbishments Ltd | Construction | 2011 |
| Acclaimed Content Limited | Information & communication | 2020 |
| Accom Estates Ltd | Real estate | 2020 |
| Accomis Ltd | Real estate | 2023 |
| Accommodate ME Ltd | Real estate | 2019 |
| Accommodation Corner Ltd | Hospitality | 2023 |
| Accommodation to LET Limited | Real estate | 1989 |
| Accomodent Ltd | Real estate | 2024 |
| Accompanied Care Limited | Other services | 2016 |
| Accord Living Limited | Public administration | 2018 |
| Accotax Limited | Professional & scientific | 2024 |
| Account Filer Ltd | Administrative & support | 2016 |
| Accountable Entrepreneur Ltd | Professional & scientific | 2024 |
| Accountancy & Business Consultancy Services Ltd | Information & communication | 2008 |
| Accountancy Partners Ltd | Professional & scientific | 2017 |
| Accountancy Tax and Business Solutions Ltd | Professional & scientific | 2023 |
| Accountancy Works Limited | Professional & scientific | 2004 |
| Accountant Online Limited | Professional & scientific | 2010 |
| Accountants for Professionals & Businesses (Afpb) Ltd | Professional & scientific | 2019 |
| Accountants Tax & VAT Limited | Professional & scientific | 2024 |
| Accountax Professionals Limited | Professional & scientific | 2016 |
| Accountico Limited | Professional & scientific | 2020 |
| Accounting Made Simple Ltd | Professional & scientific | 2019 |
| Accounting Tax & Business Solutions Limited | Professional & scientific | 2024 |
| Accounts Assist Ltd | Professional & scientific | 2009 |
| Accountswise Ltd | Extraterritorial | 2020 |
| Accoyya Limited | Health & social care | 2024 |
| Accpro Consultants & Advisors Ltd | Professional & scientific | 2012 |
| Accquire Limited | Professional & scientific | 2026 |
| Acctv Installations Limited | Administrative & support | 2012 |
| Accu-Rite Business Solutions Ltd | Administrative & support | 2019 |
| Accubits Technologies UK Ltd | Information & communication | 2021 |
| Accucheck Services Ltd | Health & social care | 2019 |
| Acculingua Limited | Professional & scientific | 2014 |