| 62 Canfield Gardens Limited | Households | 1988 |
| 67-73 Park Street Limited | Professional & scientific | 2016 |
| 69 Fortuneswell Ltd | Extraterritorial | 2018 |
| 7 Step Limited | Professional & scientific | 2009 |
| 70 Tranmere Road Limited | Households | 2023 |
| 71 Windsor Road Properties (Ealing) Ltd | Professional & scientific | 2010 |
| 80 Belsize Park Gardens RTM Company Limited | Households | 2018 |
| 80B Limited | Professional & scientific | 2019 |
| 83 Randolph Avenue Freehold Company Limited | Households | 2014 |
| 84 High Street Limited | Hospitality | 2022 |
| 88 Fortuneswell Ltd | Extraterritorial | 2012 |
| 91/93 Greencroft Gardens Management Limited | Households | 1995 |
| 92 Works Ltd | Construction | 2025 |
| 96 Degrees Ltd | Hospitality | 2017 |
| 968 Media Limited | Professional & scientific | 2005 |
| A & K'S Trash to Treasures Ltd | Water & waste | 2026 |
| A Case for Coaching Ltd | Professional & scientific | 2019 |
| A Collective of Foxes Ltd | Information & communication | 2025 |
| A Heffs Ltd | Professional & scientific | 2025 |
| A I Raguro Services Ltd | Health & social care | 2026 |
| A J Supplies Limited | Wholesale & retail | 2014 |
| A Knights Management Consulting Limited | Financial services | 2015 |
| A Plus Asbestos Ltd | Water & waste | 2019 |
| A S Tomar Ltd | Real estate | 2023 |
| A Spec Environmental Ltd | Water & waste | 2017 |
| A Spec Property Development Limited | Construction | 2023 |
| A W Solid Designs Limited | Professional & scientific | 2014 |
| A&B Consultancy Ltd | Professional & scientific | 2021 |
| A&S Group Ltd | Hospitality | 2024 |
| A-Link (International) Limited | Real estate | 2007 |
| A.B. Nutrition Limited | Wholesale & retail | 1985 |
| A.E.S Residential Ltd | Real estate | 2026 |
| A.H.C.(Camberley)Limited | Wholesale & retail | 1961 |
| A.Roman Services Ltd | Transport & logistics | 2017 |
| A.S.K. Transport Solutions Limited | Professional & scientific | 2012 |
| A.W. Davis Properties Limited | Professional & scientific | 1963 |
| A2 Supplies Ltd | Wholesale & retail | 2015 |
| A2B Valeting Limited | Administrative & support | 2022 |
| A2Z Professional Services Ltd | Construction | 2024 |
| A3L Limited | Wholesale & retail | 2025 |
| AA a Power Ltd | Real estate | 2024 |
| AA Histopathology Limited | Health & social care | 2021 |
| AAA Waste Ltd | Water & waste | 2019 |
| AAC Oriental Kitchen Limited | Hospitality | 2018 |
| Aafiyat Wellness Ltd | Wholesale & retail | 2026 |
| AAH Services Group Ltd | Wholesale & retail | 2023 |
| Aahar Foods Limited | Wholesale & retail | 2025 |
| Aali Cafe Ltd | Hospitality | 2021 |
| Aarne Ltd | Real estate | 2023 |
| AB Coaching Limited | Professional & scientific | 2021 |
| AB Communications PR Limited | Professional & scientific | 2009 |
| ABA Brands Ltd | Wholesale & retail | 2021 |
| Abacus Bidco Limited | Financial services | 2022 |
| Abacus Window Cleaning Ltd | Administrative & support | 2017 |
| Abadine Limited | Real estate | 1982 |
| ABC Resources Limited | Real estate | 2000 |
| ABE Electrical Ltd | Construction | 2020 |
| Abie's Care Limited | Health & social care | 2026 |
| Ablaze Baking Solutions Ltd | Manufacturing | 2012 |
| Ablaze Building Solutions Limited | Construction | 1997 |
| Ablaze Green Energy Solutions Ltd | Construction | 2002 |
| Able Denture Clinic Ltd | Health & social care | 2013 |
| ABM Surveys Limited | Administrative & support | 2010 |
| Abma Consulting Limited | Professional & scientific | 2013 |
| Abode With US Ltd | Hospitality | 2025 |
| About Africa Limited | Administrative & support | 1994 |
| About Loyalty Limited | Administrative & support | 2015 |
| Above N Beyond Cleaning Ltd | Administrative & support | 2022 |
| Above Nature Limited | Administrative & support | 2024 |
| Absolute Climate Limited | Construction | 2009 |
| Absolute Consultancy & Construction Services Limited | Professional & scientific | 2023 |
| Absolute Fractionals Limited | Professional & scientific | 2013 |
| Absolute Title Limited | Professional & scientific | 1995 |
| Absolute Vacation Club Limited | Professional & scientific | 2015 |
| Absolute World Title Limited | Professional & scientific | 2015 |
| AC Jade Trading Limited | Wholesale & retail | 2007 |
| ACA Plumbing and Heating Limited | Construction | 2009 |
| Acad Homes Ltd | Real estate | 2025 |
| Academy Environmental Services Limited | Professional & scientific | 2009 |
| Academy Networks Limited | Information & communication | 2002 |
| Academy Swim School Ltd | Arts & recreation | 2018 |
| Access Clubs Title Limited | Professional & scientific | 2002 |
| Acceta Group Ltd | Information & communication | 2024 |
| Accordia Mortgage and Protection Services Limited | Professional & scientific | 2020 |
| Acdc Land Consulting Ltd | Administrative & support | 2026 |
| Ace Corporate Fitness Ltd | Health & social care | 2024 |
| Ace Worktop Ltd | Construction | 2025 |
| Acec Enterprises Ltd | Wholesale & retail | 2024 |
| Aceralia Corporacion Siderurgica S.A. | | 1995 |
| Achol Ltd | Wholesale & retail | 2024 |
| Ackresponse Limited | Information & communication | 2024 |
| Acme Home Improvements Ltd | Construction | 2025 |
| Acorn (Holdings) Limited | Real estate | 2013 |
| Acorn Estate Management Limited | Real estate | 2004 |
| Acorn Land & Strategic Property Division Limited | Real estate | 2003 |
| Acorn Limited | Real estate | 2002 |
| ACS Property Consultants Limited | Real estate | 1999 |
| Action Special Effects Ltd | Information & communication | 2023 |
| Active Psychology Limited | Health & social care | 2012 |
| Acuson United Kingdom Ltd. | Manufacturing | 2021 |