| 1/5 Fitness Limited | Health & social care | 2017 |
| 100 Stays Ltd | Real estate | 2023 |
| 101 Arts CIC | Health & social care | 2015 |
| 23/46 Productions Limited | Information & communication | 2017 |
| 53 Eaton Park Road Freehold Limited | Hospitality | 2001 |
| 9CLOUD Consulting Ltd | Professional & scientific | 2015 |
| A & M Renovations Ltd | Construction | 2020 |
| A & T Investment Property Ltd | Real estate | 2025 |
| A.C. Motors Trading Limited | Wholesale & retail | 2006 |
| A.J.L Builders Limited | Construction | 2026 |
| A.K. Construction & Design Limited | Construction | 2016 |
| A.L.J. Properties Limited | Real estate | 2013 |
| A.P. Consultancy Engineering Limited | Construction | 2012 |
| A10 Bubbles Limited | Other services | 2011 |
| Aaix Investment Properties Ltd | Real estate | 2025 |
| Absolute Trade Limited | Manufacturing | 2014 |
| Acacia Coaching and Development Limited | Administrative & support | 2016 |
| Accident MAN Limited | Other services | 2011 |
| Acropoli Construction Ltd | Construction | 2017 |
| Active Structure Ltd | Construction | 2020 |
| Acurra Investments Limited | Real estate | 2015 |
| Adar Gold Limited | Wholesale & retail | 2016 |
| Adpl (UK) Ltd | Professional & scientific | 2022 |
| Adpl LLP | | 2016 |
| Aesthetic & Medical Services Limited | Health & social care | 2014 |
| Afee Investment Limited | Real estate | 2019 |
| Ag&Es Ltd | Transport & logistics | 2019 |
| Agajordan Limited | Wholesale & retail | 2022 |
| Agt.Hp Ltd | Construction | 2019 |
| AI Estate Holdings Ltd | Construction | 2023 |
| Ajds Management Ltd | Real estate | 2025 |
| Akin Consultancy & Engineering (UK) Ltd | Professional & scientific | 2017 |
| ALB UK Electrical Ltd | Construction | 2023 |
| ALC Property Investments Limited | Real estate | 2015 |
| Alemar Limited | Professional & scientific | 2011 |
| Alexander Young Consultancy LLP | | 2021 |
| Alexanne Limited | Professional & scientific | 1996 |
| Alfa Properties (Enfield) Limited | Real estate | 2020 |
| ALL Star Dental Ltd | Health & social care | 2023 |
| Allsaints Plastering Limited | Construction | 2012 |
| Allserve Heating and Plumbing Limited | Construction | 2003 |
| Alp's Kitchen Limited | Hospitality | 2018 |
| Alpha Drywall Ltd | Construction | 2019 |
| Altey Properties Limited | Real estate | 2020 |
| AMK Endo Services Limited | Health & social care | 2014 |
| AMS (Weld) Ltd | Construction | 2022 |
| Amynta Ltd | Health & social care | 2023 |
| Andros Construction Limited | Construction | 2017 |
| Andros Property Investments Ltd | Real estate | 2021 |
| Angelikos & Co Limited | Construction | 2007 |
| Angelikos Properties Ltd | Construction | 2020 |
| Antenna Ltd | Information & communication | 2008 |
| AP Property Investments Limited | Real estate | 2015 |
| Apple Tree Comms UK Limited | Professional & scientific | 2014 |
| Appleby Court Management Company Limited | Households | 2009 |
| Arasz Limited | Other services | 2025 |
| Arbor Windows Ltd | Construction | 2017 |
| Ardic UK Ltd | Manufacturing | 2015 |
| Argyrou and Co Ltd | Construction | 2024 |
| Arkitekt Limited | Professional & scientific | 2004 |
| Arko Investment Ltd | Real estate | 2023 |
| Arte Global Ltd | Wholesale & retail | 2024 |
| Artian Ltd | Wholesale & retail | 2020 |
| Ashmore Estates Limited | Real estate | 2007 |
| AT Newman Property Limited | Real estate | 2013 |
| Athens (UK) Limited | Professional & scientific | 2014 |
| Athens Street Food Ltd | Hospitality | 2019 |
| AVM Construction Ltd | Construction | 2014 |
| Avraam Associates Limited | Professional & scientific | 2014 |
| Bar Bar. Co Brentwood Ltd | Other services | 2023 |
| Bar Projects Ltd | Construction | 2024 |
| Barbar.Co Limited | Wholesale & retail | 2017 |
| Barbarco City Limited | Other services | 2022 |
| Bardho Painting & Decorating Ltd | Construction | 2022 |
| Barefoot Girl Limited | Administrative & support | 2009 |
| Barrie Fielder Technical Services Limited | Professional & scientific | 1988 |
| Basri Construction Ltd | Construction | 2025 |
| BCC Holdings Limited | Administrative & support | 2023 |
| Bellaria Restaurant Limited | Hospitality | 2019 |
| Benji O'Neill Limited | Information & communication | 2017 |
| Berkeley Crown Investments Limited | Real estate | 2022 |
| Beysfood Limited | Wholesale & retail | 2020 |
| BGN Advisory Limited | Professional & scientific | 2018 |
| Big Mama's Bakery Limited | Transport & logistics | 1999 |
| Bisha Contractors Ltd | Construction | 2023 |
| Bluebell Design Limited | Administrative & support | 2009 |
| BM Painting & Decorating Ltd | Construction | 2025 |
| Bogson Construction Limited | Construction | 2019 |
| Bradley Simmonds Limited | Other services | 2016 |
| Brenstyle Properties Limited | Construction | 1998 |
| Bricksmortar Investments Limited | Real estate | 2005 |
| Brkrs Ltd | Wholesale & retail | 2020 |
| Broadway HOG Roast Ltd | Hospitality | 2023 |
| Btce Limited | Other services | 2013 |
| Butler's Court Property Management Company Ltd | Real estate | 2016 |
| Buttress Point Ltd | Construction | 2023 |
| BWP Construction Ltd | Construction | 2024 |
| C C K Group Ltd | Transport & logistics | 2023 |
| C Theochari Limited | Transport & logistics | 2011 |
| C Wise Property Ltd | Real estate | 2023 |