| 110 Developments Limited | Construction | 2023 |
| 110% People Ltd | Administrative & support | 2020 |
| 130ONLINE Limited | Professional & scientific | 2016 |
| 150 Leadenhall Street Nominees Limited | Real estate | 1977 |
| 1ST Class Linen Services Limited | Other services | 2011 |
| 1ST Clinic UK Limited | Health & social care | 2025 |
| 212 Engineering Limited | Professional & scientific | 2020 |
| 222 Electrical Services Ltd | Professional & scientific | 2025 |
| 24/7PROACTIVE Limited | Health & social care | 2025 |
| 247IN365ACTIVE Limited | Health & social care | 2026 |
| 24K Properties Ltd | Real estate | 2020 |
| 31 Fountayne Ltd | Real estate | 2018 |
| 311 Investments Limited | Real estate | 2025 |
| 365 Compliance Ltd | Professional & scientific | 2025 |
| 365OPENS Daily Limited | Health & social care | 2025 |
| 365SKYKAN International Limited | Information & communication | 2024 |
| 68 Gordon Road Management Company Limited | Households | 2002 |
| 69-81 Lincoln Road (Freehold) Limited | Households | 2018 |
| 8 Zero Consulting Limited | Information & communication | 2008 |
| 80 Charlmont Road Limited | Real estate | 2025 |
| 8BIT Revolution Limited | Administrative & support | 2025 |
| 9501 Holdings Ltd | Real estate | 2023 |
| 9TH BIT Limited | Information & communication | 2010 |
| A & C Autos Ltd | Wholesale & retail | 2016 |
| A & J Carriage Ltd | Wholesale & retail | 2019 |
| A - J Headspa Ltd | Health & social care | 2025 |
| A a Lyons Ltd | Wholesale & retail | 2012 |
| A H Building and Maintenance Ltd | Professional & scientific | 2018 |
| A J Beale Electrical Limited | Construction | 2023 |
| A J Moves Limited | Transport & logistics | 2022 |
| A J Scaffolding Limited | Construction | 1995 |
| A Place to Live Limited | Real estate | 2021 |
| A R Assets & Resorts Limited | Hospitality | 2019 |
| A Team Services Limited | Water & waste | 2015 |
| A&D Rental Properties Ltd | Real estate | 2023 |
| A&E Lagger Ltd | Construction | 2025 |
| A&G Mortgage Advisors Limited | Financial services | 2023 |
| A-Davis Solutions Ltd | Professional & scientific | 2022 |
| A-Life Ventures Ltd | Professional & scientific | 2025 |
| A.C.W Motors Limited | Wholesale & retail | 2003 |
| A.J.N Mechanical Repairs Limited | Wholesale & retail | 2013 |
| A1 Astroturf Ltd | Other services | 2020 |
| A1 Developments Ltd | Manufacturing | 2019 |
| AA Kwik Skips Limited | Water & waste | 2025 |
| AAA BP Connect Services Ltd | Wholesale & retail | 2018 |
| AAA Eureka Online Limited | Education | 2017 |
| AAC Europe Limited | Transport & logistics | 2012 |
| Aadavis Photography Limited | Professional & scientific | 2019 |
| AAL Management Ltd | Extraterritorial | 2016 |
| Aalten Electricals Limited | Construction | 2019 |
| Abbiecom Limited | Information & communication | 2012 |
| ABC Container's Ltd | Manufacturing | 2021 |
| ABC Essex Heating Limited | Construction | 2016 |
| Abereinga Company Ltd | Health & social care | 2018 |
| ABI Laditan Ltd | Professional & scientific | 2022 |
| ABL National Breakdown Ltd | Wholesale & retail | 2022 |
| ABR Access Ltd | Administrative & support | 2026 |
| Absalom and Tribe Limited | Wholesale & retail | 1982 |
| Absalom Holdings Limited | Administrative & support | 2007 |
| Abseil Solutions Limited | Construction | 2010 |
| Ac&Ms Limited | Professional & scientific | 2003 |
| Acacia Construction & Refurbishment Limited | Construction | 2024 |
| Access ALL Areas (Rope Access) Ltd | Construction | 2017 |
| Access Learning Online Limited | Education | 2016 |
| Access Some Areas Ltd | Administrative & support | 2019 |
| Accounting & Educational Services Ltd | Education | 2004 |
| Accounts Completed Ltd | Professional & scientific | 2022 |
| Ace Magic Studio Ltd | Wholesale & retail | 2018 |
| Ace Project Management Ltd. | Professional & scientific | 2017 |
| Ace Solutions T/A VIP Tanning Limited | Other services | 2026 |
| ACG Mechanical Limited | Information & communication | 2016 |
| ACR Facilities & Interiors Ltd | Construction | 2019 |
| Action Management Solutions Limited | Construction | 2012 |
| Actipro Ltd | Wholesale & retail | 2020 |
| Acuity Technology Limited | Information & communication | 2017 |
| ACW Car Wash Ltd | Administrative & support | 2019 |
| Adams Legacy Property Group Ltd | Construction | 2026 |
| Address Design Limited | Wholesale & retail | 2012 |
| ADS Essex Ltd | Information & communication | 2013 |
| Advanced Automated Access Limited | Construction | 2008 |
| Advanced Fluid Solutions Ltd | Manufacturing | 2008 |
| Aequalis Financial Ltd | Real estate | 2016 |
| AES Essex Ltd | Construction | 2015 |
| Aether Healthcare Ltd | Public administration | 2024 |
| Aevos OS Ltd | Information & communication | 2026 |
| African Traders Ltd | Wholesale & retail | 2025 |
| AFS Fashion Ltd | Wholesale & retail | 2010 |
| AI Executive Ltd | Information & communication | 2025 |
| AI Web Solutions Limited | Information & communication | 2021 |
| Airserv Compliance Ltd | Professional & scientific | 2023 |
| AJ Breakers Ltd | Wholesale & retail | 2021 |
| AJ Import and Export Limited | Wholesale & retail | 2025 |
| AJH Media Limited | Information & communication | 2025 |
| AJS Environmental Services Ltd | Water & waste | 2018 |
| AJT Installation Ltd | Administrative & support | 2018 |
| AK Haven Limited | Real estate | 2023 |
| AK103 Limited | Hospitality | 2024 |
| Akdogan Dengiz Ltd | Other services | 2021 |
| AL Farrer Ltd | Professional & scientific | 2025 |
| Alaivi Ltd | Wholesale & retail | 2024 |