| Aashh Properties Ltd | Real estate | 2025 |
| Aaspire Records Limited | Information & communication | 2022 |
| Aayat Consulting Ltd | Wholesale & retail | 2026 |
| AAZ Supplies Ltd | Wholesale & retail | 2024 |
| Aaztex Ltd | Manufacturing | 2024 |
| Aazua Ltd | Hospitality | 2025 |
| AB & SA Ltd | Hospitality | 2025 |
| AB Medical 24/7 Limited | Health & social care | 2023 |
| Abas Estates Limited | Real estate | 2010 |
| Abas Online Limited | Wholesale & retail | 2020 |
| Abasn Limited | Wholesale & retail | 2024 |
| Abbey Healthcare Solutions Ltd | Health & social care | 2023 |
| Abbey James Limited | Construction | 2022 |
| Abbeythorn Estates Ltd | Real estate | 2014 |
| Abdalla Investments Limited | Real estate | 2025 |
| Abec Properties Limited | Construction | 2002 |
| Abella Group LLP | | 2021 |
| Abella Holdings Ltd | Financial services | 2017 |
| Abella Management Services UK Limited | Real estate | 2018 |
| Abexsun Limited | Information & communication | 2012 |
| Abexsun Properties Limited | Real estate | 2026 |
| Abidur Limited | Real estate | 2025 |
| Abilas IT Ltd | Information & communication | 2014 |
| ABK Films Ltd | Manufacturing | 2025 |
| Able Plastering Ltd | Construction | 2022 |
| ABM (Lancashire) Holdings Limited | Construction | 2007 |
| ABM (Lancashire) Limited | Construction | 2004 |
| Abode Nationwide Properties Limited | Households | 2016 |
| Abraham Traders Limited | Wholesale & retail | 2024 |
| Absolute Developments (NW) Ltd | Administrative & support | 2016 |
| Absolute Flooring Ltd | Construction | 2019 |
| Abundant Enterprises Ltd | Administrative & support | 2019 |
| Abwec Ltd | Health & social care | 2020 |
| ABX Investing Ltd | Financial services | 2025 |
| ABX Medical Ltd | Health & social care | 2015 |
| ABY Associates Ltd | Administrative & support | 2015 |
| AC Concrete Pumping Ltd | Administrative & support | 2014 |
| AC Electrical (Rochdale) Limited | Construction | 2005 |
| AC Electrical Holdings Limited | Financial services | 2025 |
| ACA Aggregates Ltd | Wholesale & retail | 2025 |
| Academic Gateway Ltd | Education | 2025 |
| Academy Divers Limited | Education | 2009 |
| ACB Property & Rentals Limited | Real estate | 2024 |
| Accessory Line UK Ltd | Administrative & support | 2014 |
| Accident Claims Management Limited | Administrative & support | 2005 |
| Accomodateu Limited | Health & social care | 2024 |
| Accountancy and Business Support (UK) Ltd | Professional & scientific | 2002 |
| Accountancy Simplified Limited | Professional & scientific | 2011 |
| Accumac Limited | Wholesale & retail | 2011 |
| Ace Cutz & Hair Style Ltd | Wholesale & retail | 2024 |
| Ace Direct Ltd | Manufacturing | 2012 |
| Ace Perfumes Ltd | Wholesale & retail | 2026 |
| Ace Polishing Services Limited | Manufacturing | 2007 |
| Ace Property Services Ltd | Real estate | 2026 |
| Acegate (Manufacturing) Ltd | Manufacturing | 1996 |
| Achari Restaurant Limited | Hospitality | 2018 |
| Achievers Global Ltd | Wholesale & retail | 2025 |
| ACN Property Management Ltd | Real estate | 2023 |
| Acorn Building Services Ltd | Construction | 2007 |
| Acorn Global Limited | Wholesale & retail | 2017 |
| Acoustify Ltd | Health & social care | 2022 |
| Acrali Home Ltd | Wholesale & retail | 2013 |
| Acre Homecare Ltd | Health & social care | 2022 |
| Acryate Research and Development Limited | Professional & scientific | 2004 |
| ACS Detailing Ltd | Professional & scientific | 2023 |
| Actfast Drain Services Ltd | Administrative & support | 2008 |
| Action Force Ltd | Wholesale & retail | 2012 |
| Action Rochdale Ltd | Arts & recreation | 2013 |
| Activate the City Ltd | Professional & scientific | 2019 |
| Active 'N' Learn Ltd | Health & social care | 2025 |
| Active RK Ltd | Transport & logistics | 2017 |
| Active Roofing Ltd | Construction | 2022 |
| Activebookings.Com Ltd | Other services | 2025 |
| Acton & Acton Limited | Manufacturing | 1985 |
| Acton UK Management Ltd | Administrative & support | 2011 |
| AD Laser Cutting Ltd | Manufacturing | 2023 |
| AD Van Advertising Ltd | Information & communication | 2024 |
| Adalogo Ltd | Manufacturing | 2025 |
| Adam and Scott Ltd | Wholesale & retail | 2020 |
| Adam Brothers Property Limited | Households | 2025 |
| Adam Home Global Ltd | Manufacturing | 2024 |
| Adam Ledger Property Lawyers Limited | Professional & scientific | 2018 |
| Adam Scorpio Transport Ltd | Transport & logistics | 2016 |
| Adam UK General Store Ltd | Wholesale & retail | 2024 |
| Adam Windows Rochdale Limited | Construction | 2017 |
| Adam's Food International Ltd | Hospitality | 2025 |
| Adams Vibes UK Ltd | Wholesale & retail | 2025 |
| Adamson Legal Ltd | Professional & scientific | 2010 |
| Adeel Afzal Ltd | Financial services | 2015 |
| Adelh Limited | Real estate | 2018 |
| Adestyvn Builds Limited | Construction | 2019 |
| Adhara Group Limited | Transport & logistics | 2022 |
| Adhesive Coatings Holdings Limited | Professional & scientific | 2003 |
| Adhesive Coatings Limited | Manufacturing | 1986 |
| ADIL786 Limited | Wholesale & retail | 2025 |
| Adis Auto Hub Ltd | Wholesale & retail | 2025 |
| Admiral Windows & Glass Limited | Manufacturing | 2004 |
| Admumt Ltd | Wholesale & retail | 2023 |
| Adnan Deliveries Limited | Transport & logistics | 2025 |
| ADR Chem-Lube & Fuels Ltd | Transport & logistics | 2021 |