| ADP 2024 Limited | Financial services | 2024 |
| ADP Enterprises Ltd | Education | 2022 |
| ADP Ltd | Extraterritorial | 2021 |
| ADP Rail Limited | Construction | 2018 |
| Adpt Ltd | Arts & recreation | 2026 |
| ADR 2 Limited | Real estate | 2024 |
| ADR 3 Limited | Real estate | 2025 |
| ADR Architecture Ltd | Professional & scientific | 2020 |
| ADR Divine Destiny Ltd | Health & social care | 2014 |
| ADR Logistics Ltd | Transport & logistics | 2025 |
| ADR Rebar Ltd | Construction | 2025 |
| ADR Technology Limited | Information & communication | 2019 |
| Adrd Consultancy Limited | Professional & scientific | 2024 |
| Adrees & Sons Ltd | Wholesale & retail | 2022 |
| Adrenalin Promotions Ltd | Arts & recreation | 2005 |
| Adrian Courier Services Ltd | Transport & logistics | 2025 |
| Adrian Evans Technical Ltd | Construction | 2007 |
| Adrian Logistics Limited | Transport & logistics | 2025 |
| Adrian Stickland Limited | Professional & scientific | 2005 |
| Adrian Trans 02 Limited | Transport & logistics | 2024 |
| Adrian Transport 97 Limited | Transport & logistics | 2025 |
| Adris Company Limited | Transport & logistics | 2025 |
| ADS Housing Ltd | Real estate | 2025 |
| ADS Industry Limited | Professional & scientific | 2022 |
| ADS Leafleting Ltd | Professional & scientific | 2025 |
| ADS Professional Services Ltd | Professional & scientific | 2018 |
| ADS Trade UK Limited | Transport & logistics | 2011 |
| ADS Traders Ltd | Hospitality | 2017 |
| ADS4LAWYERS Ltd | Other services | 2020 |
| Adsave Holdings Ltd | Financial services | 2019 |
| Adsave Limited | Financial services | 2011 |
| Adsborough Hill Ltd | Transport & logistics | 2021 |
| Adsc Investments Ltd | Real estate | 2025 |
| Adsj Developments Ltd | Households | 2023 |
| Adsomething Ltd | Professional & scientific | 2021 |
| Adsons Autos Limited | Wholesale & retail | 2014 |
| Adsseller Ltd | Wholesale & retail | 2023 |
| Adstork AD Network Ltd | Professional & scientific | 2022 |
| ADT Holidays Limited | Hospitality | 2017 |
| ADT Retail Ltd | Wholesale & retail | 2024 |
| Adthera BIO Limited | Professional & scientific | 2022 |
| Adufes Kitchen Ltd | Hospitality | 2024 |
| Adulescens Limited | Wholesale & retail | 2025 |
| Adulin Ltd | Wholesale & retail | 2026 |
| Adult Social Care Ltd | Health & social care | 2022 |
| Aduwa &Co Ltd | Wholesale & retail | 2024 |
| ADV CS1 Ltd | Other services | 2005 |
| ADV Fusionex Limited | Information & communication | 2008 |
| ADV Properties Ltd | Real estate | 2018 |
| Advance Autos (UK) Ltd | Wholesale & retail | 2014 |
| Advance Capital Investment Ltd | Financial services | 2024 |
| Advance Cardiac Solutions Limited | Health & social care | 2010 |
| Advance Drivers Limited | Administrative & support | 2009 |
| Advance Forward Two Work Ltd | Education | 2024 |
| Advance General Trading Ltd | Wholesale & retail | 2025 |
| Advance Global Management Ltd. | Wholesale & retail | 2013 |
| Advance Group Midlands Ltd | Transport & logistics | 2024 |
| Advance Housing Support Ltd | Real estate | 2019 |
| Advance Learning Service Limited | Education | 2022 |
| Advance Maintenance and Rubbish Removals Ltd | Water & waste | 2018 |
| Advance Medical Care Limited | Health & social care | 2026 |
| Advance Metals Ltd | Wholesale & retail | 2021 |
| Advance Preservation and Construction Limited | Construction | 2023 |
| Advance Printwear Limited | Manufacturing | 2005 |
| Advance Properties UK Ltd | Real estate | 2025 |
| Advance Property Holdings Limited | Real estate | 2019 |
| Advance Property Partners Ltd | Real estate | 2020 |
| Advance Taxi Hire Ltd | Transport & logistics | 2020 |
| Advance Tech Birmingham Ltd | Wholesale & retail | 2025 |
| Advance Trading Ltd | Wholesale & retail | 2018 |
| Advance Vehicle Security (Bham) Ltd | Wholesale & retail | 2022 |
| Advance Vehicle Security Ltd | Wholesale & retail | 2010 |
| ADVANCE2MAYFAIR Ltd | Wholesale & retail | 2026 |
| Advanced 365 Limited | Financial services | 2011 |
| Advanced Appearance Limited | Other services | 2003 |
| Advanced Architecture and Structures Limited | Professional & scientific | 2017 |
| Advanced Auto Accident Repair Ltd | Manufacturing | 2012 |
| Advanced Breast Clinical Diagnostics Ltd. | Health & social care | 2018 |
| Advanced Business Software and Solutions Limited | Professional & scientific | 2001 |
| Advanced Car Tuning Trading AS Autohelp Ltd. | Manufacturing | 2003 |
| Advanced Colour Coatings Limited | Manufacturing | 2004 |
| Advanced Computer Software Group Limited | Financial services | 2011 |
| Advanced Dental Laboratories Ltd | Manufacturing | 2016 |
| Advanced Dental Orthodontics Laboratories Ltd | Manufacturing | 2018 |
| Advanced Dental Whitening Supplies Limited | Manufacturing | 2022 |
| Advanced EYE Surgery Limited | Health & social care | 2014 |
| Advanced Foam Solutions Limited | Manufacturing | 2025 |
| Advanced GAS & Heating Solutions Ltd | Construction | 2015 |
| Advanced GAS Heating Limited | Construction | 2018 |
| Advanced Genomics Limited | Professional & scientific | 2020 |
| Advanced Health and Care Limited | Information & communication | 1994 |
| Advanced Home Health Care Ltd | Health & social care | 2022 |
| Advanced Implant Laboratories Limited | Manufacturing | 2022 |
| Advanced Info Systems Limited | Information & communication | 2019 |
| Advanced Insurance Consultants Limited | Financial services | 2003 |
| Advanced Interactive Materials Science Limited | Professional & scientific | 2012 |
| Advanced IP Limited | Information & communication | 2012 |
| Advanced Keys Limited | Other services | 2003 |
| Advanced MOT & Service Ltd | Wholesale & retail | 2024 |
| Advanced Motoring Limited | Administrative & support | 2019 |