| 08643062 Limited | Other services | 2013 |
| 1 Oak Dental Limited | Wholesale & retail | 2021 |
| 1995 Settlement Trust Limited | Other services | 2017 |
| 2020 Data LAB Ltd | Information & communication | 2017 |
| 25 Barnet Limited | Construction | 2016 |
| 38 Fairhazel Gardens Limited | Other services | 2002 |
| 5 ST Wilfrid's Road Management Company Limited | Real estate | 2001 |
| 7 Seas Consultants Ltd | Information & communication | 2012 |
| A - Star Disposables Ltd | Wholesale & retail | 2025 |
| A M R Surveyors Limited | Professional & scientific | 2014 |
| A&K Building and Design Ltd | Construction | 2021 |
| A.B.S.A. Line Co. LLP | | 2007 |
| Aaie Elstree Limited | Hospitality | 2023 |
| Aaie Warwickshire Limited | Hospitality | 2026 |
| Aarmor Ltd | Extraterritorial | 2026 |
| Abbots 381 Limited | Professional & scientific | 2010 |
| ABI Secretariat Limited | Administrative & support | 2016 |
| Abington Property Investment Limited | Real estate | 2012 |
| Access Nominees Limited | Extraterritorial | 1994 |
| Access Registrars Limited | Professional & scientific | 1987 |
| Addomi Limited | Extraterritorial | 2013 |
| Adeo Properties Ltd | Real estate | 2025 |
| AHA Resources Ltd | Information & communication | 2019 |
| AI Vehicle Solutions Ltd | Water & waste | 2020 |
| Aidan Property Company Ltd | Households | 2019 |
| AJ & Daughters Investments Ltd | Real estate | 2021 |
| AJ Sports Global Limited | Arts & recreation | 2015 |
| Ajjm Investments Limited | Construction | 2023 |
| AJP Consultancy Services Limited | Administrative & support | 2023 |
| Aldenham Schools Holdings Limited | Financial services | 2019 |
| Allsuch Capital Limited | Real estate | 2021 |
| Allsuch Properties UK Ltd | Real estate | 2021 |
| Alto Consulting Services Limited | Professional & scientific | 2010 |
| Andelle Accounting Services Limited | Professional & scientific | 2001 |
| Anden Investments Limited | Real estate | 1958 |
| Anden Properties Limited | Construction | 1953 |
| Angle Deliveries LLP | | 2023 |
| Anisha Properties Ltd | Real estate | 2021 |
| Annal International Trading Co. Ltd | Wholesale & retail | 2018 |
| Apatech Limited | Manufacturing | 2001 |
| App Ktchn Ltd | Information & communication | 2014 |
| Arden Facilities LLP | | 2020 |
| Argo Investments Limited | Real estate | 2015 |
| Arial (London) Ltd | Financial services | 2024 |
| Arial Ltd | Financial services | 2022 |
| ARS Consultancy Services Ltd | Other services | 2013 |
| Ashfield Web Services Limited | Information & communication | 1999 |
| Ashford Alliance Limited | Financial services | 2005 |
| Ashton Riley Optical Limited | Wholesale & retail | 2021 |
| Astoria Events Ltd | Other services | 2019 |
| Astranet 2000 Limited | Information & communication | 1998 |
| Ats-Tanner Banding Systems (UK) Ltd | Wholesale & retail | 2015 |
| Auction Legal Contracts Limited | Professional & scientific | 2020 |
| Avery Projects Ltd | Wholesale & retail | 2020 |
| AXA Properties (UK) Ltd | Real estate | 2007 |
| AZR Limited | Professional & scientific | 2004 |
| Azure Transport LLP | | 2023 |
| Baby Divine Ltd | Hospitality | 2026 |
| Ballycroy Construction Limited | Construction | 2012 |
| Balvanera Ltd | Wholesale & retail | 2022 |
| Bankside Recruitment Ltd | Administrative & support | 2015 |
| Barin Architectural & Structural Designs Limited | Construction | 2025 |
| Bartonway Limited | Administrative & support | 1988 |
| BB Technology Ltd | Financial services | 2021 |
| Bedat Investments Limited | Financial services | 2020 |
| Bellman Property Group Limited | Other services | 2011 |
| Benbrook Logistics LLP | | 2023 |
| Bespoke VR Limited | Information & communication | 2013 |
| Better Books (UK) Limited | Administrative & support | 2007 |
| Bevans Construction Ltd | Construction | 2026 |
| BHH India Limited | Administrative & support | 2003 |
| BIO Products Laboratory Holdings Limited | Financial services | 2002 |
| BIO Products Laboratory Limited | Administrative & support | 2010 |
| Bissli 40 Ltd | Real estate | 2025 |
| Blaze Interiors Limited | Professional & scientific | 1999 |
| BLS Investing Limited | Financial services | 2021 |
| BLS Ventures Limited | Financial services | 2021 |
| Bookbuild Limited | Extraterritorial | 2022 |
| Borchardt Capital Ltd | Real estate | 2021 |
| Botiga UK Limited | Wholesale & retail | 2019 |
| Bourneclock Parcels LLP | | 2023 |
| Brett Optical Services Ltd | Wholesale & retail | 2024 |
| Bright Little Stars Group Limited | Financial services | 2014 |
| Bright Little Stars Head Office Limited | Professional & scientific | 2016 |
| Bright Little Stars Investment Limited | Real estate | 2017 |
| Bright Research & Co Limited | Professional & scientific | 2012 |
| Brightstone Law LLP | | 2008 |
| Brikans Limited | Real estate | 2021 |
| Brishieka Limited | Other services | 2011 |
| BST (Business Science Technology) LLP | | 2007 |
| Buck Couriers LLP | | 2023 |
| Bushey Hall Winches Limited | Wholesale & retail | 2003 |
| Business Relauncher Ltd | Information & communication | 2011 |
| C.R. Management Limited | Professional & scientific | 1988 |
| Caci International Limited | Health & social care | 1995 |
| Caci Microlift Limited | Health & social care | 2012 |
| Cafce LLP | | 2021 |
| Caledonian Estates (Group) Limited | Administrative & support | 2014 |
| Caledonian Property Venture "a" LLP | | 2013 |
| Calvin Street Properties Limited | Real estate | 2013 |