| Abacus Mortgage Shop Limited | Administrative & support | 2001 |
| Abacus Portfolio Management Limited | Financial services | 2000 |
| Abadan Restaurant Ltd | Hospitality | 2024 |
| Abante Performance & Fitness Ltd | Education | 2023 |
| Abarooda Limited | Construction | 2022 |
| Abaseen Dinner Limited | Hospitality | 2025 |
| Abaya by Iqra Ltd | Wholesale & retail | 2025 |
| Abaya Peace Limited | Wholesale & retail | 2019 |
| ABB0816 Limited | Real estate | 2021 |
| Abbad Ltd | Wholesale & retail | 2018 |
| Abbas Properties Services Limited | Real estate | 2023 |
| Abbass Healthcare Ltd | Health & social care | 2018 |
| Abbey Autos 1 Ltd | Wholesale & retail | 2017 |
| Abbey Dropforgings Limited | Extraterritorial | 1997 |
| Abbey Engineered Products Limited | Manufacturing | 2015 |
| Abbey Europe Ltd. | Real estate | 2008 |
| Abbey Glen Limited | Other services | 1919 |
| Abbey Hand Car Wash Limited | Wholesale & retail | 2017 |
| Abbey Knee Clinic Limited | Health & social care | 2010 |
| Abbey Lane Management Company Limited | Households | 2001 |
| Abbey Lane Residential Management Limited | Households | 2024 |
| Abbey Legal Limited | Professional & scientific | 2020 |
| Abbey Mews Flats Limited | Real estate | 2017 |
| Abbey Taylor Group Limited | Professional & scientific | 2017 |
| Abbey Taylor Jones Limited | Professional & scientific | 2024 |
| Abbey Taylor Limited | Professional & scientific | 2003 |
| Abbey Taylor Properties Limited | Real estate | 2017 |
| Abbey Vending Services Limited | Hospitality | 2003 |
| Abbey View Property Management Limited | Administrative & support | 2016 |
| Abbeycliffe Renovations Limited | Construction | 2011 |
| Abbeydale Convenience Ltd | Wholesale & retail | 2025 |
| Abbeydale Cottage Nursery Limited | Education | 2014 |
| Abbeydale Direct Limited | Extraterritorial | 2002 |
| Abbeydale Food & Bar Ltd | Hospitality | 2025 |
| Abbeydale Garage Limited | Wholesale & retail | 2025 |
| Abbeydale Golf Club Limited | Arts & recreation | 1943 |
| Abbeydale Inns Limited | Hospitality | 2006 |
| Abbeydale Kiln Limited | Construction | 2026 |
| Abbeydale Ltd | Hospitality | 2017 |
| Abbeydale Mortgages Limited | Financial services | 2022 |
| Abbeydale Multi Sports Week Limited | Arts & recreation | 2015 |
| Abbeydale Property Limited | Real estate | 2019 |
| Abbeydale Storage Limited | Manufacturing | 2013 |
| Abbeydale Super Store Ltd | Wholesale & retail | 2017 |
| Abbeydale Supermarket Limited | Wholesale & retail | 2023 |
| Abbeydale Tennis Club Limited | Arts & recreation | 1999 |
| Abbeydale Tennis Squads Limited | Arts & recreation | 2002 |
| Abbeyfield Grange Community Support Ltd | Health & social care | 2011 |
| Abbeyfield Grange Residential Home Limited | Health & social care | 2016 |
| Abbeyfield Grange Supported Living Ltd | Health & social care | 2014 |
| Abbeyview Heights Management Company Limited | Households | 2005 |
| Abbeywood House Developments Limited | Construction | 1995 |
| Abbie Services Ltd | Administrative & support | 2018 |
| Abbiedan International Limited | Wholesale & retail | 2022 |
| Abbott and Mason Building and Joinery Contractors Limited | Construction | 2002 |
| Abbott Brickwork & Construction Limited | Construction | 2016 |
| Abby Road Rituals Limited | Wholesale & retail | 2025 |
| Abbydale Properties Limited | Real estate | 2005 |
| Abbyz Beauty Limited | Other services | 2026 |
| ABC Accounting and Bookkeeping Company Ltd | Professional & scientific | 2019 |
| ABC Contractors Limited | Construction | 2009 |
| ABC Data Recovery Limited | Information & communication | 2015 |
| ABC Teachers Limited | Administrative & support | 2005 |
| ABC786 Ltd | Wholesale & retail | 2026 |
| Abcb Limited | Real estate | 2022 |
| Abco Seals Holdings Limited | Professional & scientific | 2005 |
| ABD Ventures Ltd | Hospitality | 2018 |
| Abdox Ltd | Health & social care | 2017 |
| Abdul Transport Ltd | Transport & logistics | 2024 |
| Abdul Tyres Ltd | Wholesale & retail | 2026 |
| Abdul-Salam a 2 Z Ltd | Transport & logistics | 2020 |
| Abdulrahman Alzireg Ltd | Transport & logistics | 2026 |
| Abdur-Rahman Services Limited | Wholesale & retail | 2023 |
| Abdurdad Ltd | Wholesale & retail | 2024 |
| ABE888 Limited | Other services | 2026 |
| Abeera Ahad Limited | Wholesale & retail | 2025 |
| Abel Electrical Services Ltd | Construction | 2023 |
| Abel Magnets Limited | Manufacturing | 1998 |
| Abel Motors Limited | Wholesale & retail | 2019 |
| Aberchem Ltd | Real estate | 2011 |
| Aberdevine Ltd | Wholesale & retail | 2022 |
| Abex Solutions Ltd | Professional & scientific | 2022 |
| ABF Developments Limited | Construction | 2024 |
| Abgalvin Limited | Administrative & support | 2009 |
| Abid ALI Services Ltd | Wholesale & retail | 2011 |
| Abid Connect Ltd | Wholesale & retail | 2025 |
| Abid Taxi Services Ltd | Transport & logistics | 2026 |
| Abigail Alathea Limited | Professional & scientific | 2013 |
| Ability Advise UK Limited | Professional & scientific | 2022 |
| Ability Tennis Ltd | Education | 2022 |
| Abilt Property Limited | Real estate | 2025 |
| Abineya Ltd | Wholesale & retail | 2024 |
| Abipel Lifestyle and Essentials Ltd | Wholesale & retail | 2026 |
| Abjar Sports Limited | Wholesale & retail | 2025 |
| ABK LDN Limited | Professional & scientific | 2015 |
| Able & Mettle Limited | Extraterritorial | 2003 |
| Able Assist Dogs UK Ltd | Agriculture & fishing | 2022 |
| Able Building Components (1984) Limited | Professional & scientific | 1984 |
| Able Couriers Limited | Extraterritorial | 2005 |
| Able Response Limited | Administrative & support | 2009 |