| AAA Roofing Services Ltd | Construction | 2019 |
| Aadil&Co Ltd | Transport & logistics | 2020 |
| AAG OWL Properties Limited | Real estate | 2025 |
| AAG Pro Services Limited | Information & communication | 2010 |
| Aarav Solutions Limited | Information & communication | 2014 |
| Aazoc Ltd | Wholesale & retail | 2022 |
| AB Event Hire Limited | Hospitality | 2019 |
| AB Finco Ltd | Administrative & support | 2021 |
| AB Inbev International Brands Limited | Administrative & support | 2005 |
| AB Safe Electrician Ltd | Construction | 2020 |
| Abap Central Limited | Information & communication | 2007 |
| Abava Developments Ltd. | Real estate | 2014 |
| ABB Liveaboard Boats Limited | Manufacturing | 2021 |
| Abbey Consultancy Services Limited | Professional & scientific | 2015 |
| Abbey Residential Services Limited | Real estate | 2021 |
| Abbey Wood Partners Ltd | Real estate | 2021 |
| Abbi Briscoe Consulting Ltd | Professional & scientific | 2021 |
| Abbotswood (Weybridge) Limited | Households | 1985 |
| Abbotts Travel Limited | Administrative & support | 2023 |
| ABC 012 Limited | Wholesale & retail | 2022 |
| Abcd Escolinha DE Português Ltd | Education | 2019 |
| Abco Air & Shipping Ltd | Transport & logistics | 2000 |
| Aberdeen Rooms Ltd | Hospitality | 2019 |
| ABG Property Management Ltd | Other services | 2015 |
| ABI Delivery Ltd | Transport & logistics | 2025 |
| Abiha's Fashion Ltd | Wholesale & retail | 2026 |
| ABM Woking Ltd | Wholesale & retail | 2017 |
| About Finance Limited | Professional & scientific | 2006 |
| Above and Beyond Mobility Ltd | Construction | 2025 |
| ABP Traders Ltd | Wholesale & retail | 2023 |
| ABR Woking Ltd | Transport & logistics | 2014 |
| Abreaba Technology Limited | Information & communication | 2000 |
| Abrs Consultancy Limited | Professional & scientific | 2016 |
| Abrupt Protection Ltd | Administrative & support | 2023 |
| Absolute Interiors Ltd | Construction | 2009 |
| Absolutecrm Consulting Limited | Information & communication | 2012 |
| Absolvo Ltd | Manufacturing | 2017 |
| ABT Steel Limited | Wholesale & retail | 2024 |
| AC Logic Ltd | Construction | 2010 |
| Acanthus Homes Limited | Construction | 2017 |
| ACC Auto Group Limited | Wholesale & retail | 2019 |
| ACC Cars Ltd | Transport & logistics | 2024 |
| Accelerat(H)Er Consulting Limited | Professional & scientific | 2023 |
| Accountancy Alliance Ltd | Professional & scientific | 2010 |
| Accounting and Tax Services JQ Ltd | Professional & scientific | 2012 |
| Accounts & Tax (Woking) Ltd | Professional & scientific | 2013 |
| Accounts Work Limited | Professional & scientific | 1999 |
| Accurate Holdings Limited | Professional & scientific | 1999 |
| Accurate Mechanical Services Limited | Manufacturing | 2017 |
| Accvisory Limited | Professional & scientific | 2025 |
| Ace Car Clinic Ltd | Manufacturing | 2019 |
| Ace Electricals Contractor Limited | Construction | 2025 |
| Ace Equine Ltd | Agriculture & fishing | 2018 |
| Ace Golf Events Limited | Arts & recreation | 2025 |
| ACE1 Properties Ltd | Financial services | 2023 |
| Acekrow Limited | Information & communication | 2025 |
| ACF Technologies (UK) Limited | Information & communication | 2007 |
| ACI Global Limited | Information & communication | 1998 |
| ACI Worldwide (Emea) Limited | Information & communication | 1988 |
| Acnailsworld Ltd | Wholesale & retail | 2025 |
| Acon Roofing Limited | Construction | 2024 |
| Acorn Geological Services Ltd | Professional & scientific | 2019 |
| Acornclose Limited | Households | 2004 |
| Acosta RH Limited | Financial services | 2017 |
| Acosta Sales & Marketing Limited | Professional & scientific | 2008 |
| Acoustic Polymers Limited | Manufacturing | 2006 |
| Acrom Delta Ltd | Wholesale & retail | 2022 |
| Actax Consultants Ltd | Professional & scientific | 2013 |
| ACTIV8U Limited | Health & social care | 2016 |
| Active Edge Leadership Limited | Real estate | 2016 |
| Active Management Solutions (6) Limited | Transport & logistics | 2016 |
| Activem&B CIC | Health & social care | 2026 |
| Activeoffice Limited | Professional & scientific | 1992 |
| Acton HR Limited | Professional & scientific | 2020 |
| Actualize UK Limited | Information & communication | 2009 |
| Aculga Ltd | Construction | 2024 |
| AD International Education Limited | Education | 2025 |
| AD Loca Ltd | Hospitality | 2025 |
| AD Locations Limited | Professional & scientific | 2010 |
| Adam Properties Limited | Real estate | 1986 |
| Adam Whitmore Consulting Limited | Professional & scientific | 2015 |
| Adam's Falcons Ltd | Wholesale & retail | 2024 |
| Adan Sultan Properties Limited | Real estate | 2025 |
| Adapt Framework Solutions Ltd | Information & communication | 2019 |
| Adapt Sustainability Consulting Limited | Professional & scientific | 2017 |
| ADD & ADD Limited | Real estate | 2024 |
| Addison Grove Management Limited | Real estate | 1994 |
| Addlestone Smile Studio Limited | Health & social care | 2018 |
| Addsc Limited | Professional & scientific | 2025 |
| ADE Technology Ltd | Information & communication | 2021 |
| Adeventures Ltd | Health & social care | 2020 |
| Adgas Heating Ltd | Construction | 2012 |
| Adhd Management Ltd | Health & social care | 2024 |
| Adit Real Estate Developments Private Limited | Real estate | 2016 |
| Adjacent Power Limited | Energy | 2012 |
| ADK Construction and Carpentry Limited | Construction | 2020 |
| Adken Consulting Limited | Professional & scientific | 2012 |
| Adlam Holdings Ltd | Extraterritorial | 2025 |
| Admin by Request Emea Ltd | Information & communication | 2014 |
| Adproducts.Com Limited | Wholesale & retail | 1998 |