| Access Ability CIC | Administrative & support | 2012 |
| Access Education NW Ltd | Education | 2025 |
| Accessories 4 Technology Limited | Professional & scientific | 2005 |
| Accolade Worldwide Limited | Administrative & support | 2022 |
| Accolade Worldwide Properties Ltd | Real estate | 2024 |
| Accomed (Care) 2 Limited | Real estate | 2026 |
| Accomed (Care) Ltd | Real estate | 2026 |
| Accomed (NW) Limited | Real estate | 2025 |
| According to Smith Ltd | Construction | 2017 |
| Accountancy Recruit Limited | Administrative & support | 2016 |
| Accountancy Services North West Limited | Professional & scientific | 1997 |
| Accountexcel Limited | Professional & scientific | 2013 |
| Accrington NO1 HC Wash Ltd | Wholesale & retail | 2025 |
| Accrington Prime Medical Limited | Health & social care | 2015 |
| Accrington Road (Community) Centre Ltd | Health & social care | 2013 |
| Ace Catering Blackburn Ltd | Wholesale & retail | 2022 |
| Ace Motors Blackburn Ltd | Wholesale & retail | 2024 |
| Ace Sports Management Ltd | Professional & scientific | 2020 |
| Ace! LIZ Thomas Limited | Arts & recreation | 2014 |
| Acenta Group Limited | Wholesale & retail | 2021 |
| Acepond Staffing Limited | Administrative & support | 2018 |
| Acero International Ltd | Wholesale & retail | 2017 |
| Acetech Digital UK Ltd | Information & communication | 2024 |
| Acheulean Design Ltd | Manufacturing | 2024 |
| Ackers Roofing and Cladding Ltd | Administrative & support | 2019 |
| Acky Traders Ltd | Wholesale & retail | 2018 |
| Acme Hire (Lancs) Limited | Administrative & support | 2021 |
| Acme Hire Limited | Administrative & support | 2010 |
| Acolyte Consultants Ltd | Transport & logistics | 2023 |
| Acolyte Management Services Limited | Administrative & support | 2018 |
| Acorn Fire & Security Ltd | Public administration | 2002 |
| Acorn School of Motoring Ltd | Education | 2020 |
| Acoustikit Limited | Transport & logistics | 1990 |
| Acpn Holdings Ltd | Professional & scientific | 2019 |
| ACR Car Spares Ltd | Wholesale & retail | 2021 |
| ACS Access and Maintenance Limited | Administrative & support | 2010 |
| ACS Engineering Services Limited | Professional & scientific | 2024 |
| ACS Specialist Cleaning Limited | Administrative & support | 2005 |
| Acsini Investments Limited | Real estate | 2017 |
| ACT (Action for the Community and Town) at the Cheethams Limited | Arts & recreation | 2007 |
| Active Neighbourhoods CIC | Health & social care | 2026 |
| Active Roses Ltd | Other services | 2019 |
| Active Solutions Engineering Limited | Other services | 2018 |
| Active Therapeutics Ltd | Wholesale & retail | 2020 |
| ACTIVE4KIDS Limited | Arts & recreation | 2025 |
| Actual Music Ltd. | Arts & recreation | 2017 |
| Acuity Business Consultants Limited | Professional & scientific | 2021 |
| AD Merchants Ltd | Wholesale & retail | 2023 |
| AD Plumbing & Heating Engineers Ltd | Construction | 2023 |
| ADA Property Maintenance Limited | Construction | 2007 |
| Adam & Sons Property Management Ltd | Real estate | 2024 |
| Adam Hair & Bodycare Limited | Wholesale & retail | 2012 |
| Adam Hawra Limited | Professional & scientific | 2020 |
| Adam K Supply Ltd | Wholesale & retail | 2026 |
| Adam KP Trade Ltd | Wholesale & retail | 2024 |
| Adam Laundry Limited | Other services | 2020 |
| Adam Mulcahy Limited | Information & communication | 2017 |
| Adam Trade Ltd | Wholesale & retail | 2025 |
| Adam Travel & Tours Ltd | Administrative & support | 2018 |
| Adam Upholstery Limited | Manufacturing | 1999 |
| Adam's Activity ARK CIC | Health & social care | 2021 |
| Adam's Car Valeting Limited | Administrative & support | 2023 |
| Adam's Rasoi Ltd | Hospitality | 2024 |
| Adams Global Limited | Wholesale & retail | 2013 |
| Adams Properties (Blackburn) Ltd | Real estate | 2019 |
| Adan Transport Ltd | Wholesale & retail | 2017 |
| Adaptable Innovation Limited | Information & communication | 2024 |
| Added Value Logistics Systems Ltd | Information & communication | 1999 |
| Additional Security Ltd | Administrative & support | 2021 |
| Adelphi Housing Ltd | Real estate | 2018 |
| Adham Developments Ltd | Real estate | 2020 |
| Adhan Commercials PLC | Extraterritorial | 2013 |
| Adhan Construction Limited | Construction | 2018 |
| Adhan Developments Limited | Construction | 2003 |
| Adhan Homes Ltd | Construction | 2005 |
| Adhan Investments Ltd | Real estate | 2005 |
| Adhan Investments NUM (1) Ltd | Construction | 2025 |
| Adhan Investments NUM (2) Ltd | Construction | 2025 |
| Adhan Properties Ltd | Professional & scientific | 2005 |
| Adhan Property Consultants Ltd | Construction | 2006 |
| Adhan Real Estates Limited | Real estate | 2006 |
| Adirect Heating Replacement Ltd | Other services | 2026 |
| Aditum Technica Ltd | Other services | 2018 |
| ADL Holdings Limited | Manufacturing | 2007 |
| ADL Transportation Ltd | Transport & logistics | 2023 |
| Adlu Costs Ltd | Professional & scientific | 2014 |
| Administration Gateway Limited | Professional & scientific | 2019 |
| Adnan & Sohail Limited | Wholesale & retail | 2026 |
| Adnan's Consultancy Ltd | Professional & scientific | 2015 |
| Adnic Developments Ltd | Construction | 2024 |
| Adob Consultancy Limited | Professional & scientific | 2021 |
| Adonstar (UK) LLP | | 2005 |
| Adonstar Limited | Construction | 2004 |
| ADR 46 Transport Limited | Transport & logistics | 2022 |
| ADR Digital Ltd | Information & communication | 2026 |
| Adrenaline Escape Ltd | Arts & recreation | 2024 |
| Adrenaline Escape Wigan Ltd | Arts & recreation | 2024 |
| Adstract Media & Marketing Ltd | Information & communication | 2021 |
| Advance Eco Solutions Ltd | Real estate | 2024 |
| Advance Neighbourhood Group Ltd | Real estate | 2026 |