| 10 Dining Ltd | Hospitality | 2016 |
| 198 Investments Limited | Real estate | 2025 |
| 2020 Business Networks Limited | Other services | 2015 |
| 24HR Tyres Essex Limited | Manufacturing | 2024 |
| 2E Construction Ltd | Construction | 2017 |
| 3 Way Cleaning Limited | Administrative & support | 1997 |
| 313 Glamtech Limited | Wholesale & retail | 2024 |
| 4ZERO Automotive Ltd | Wholesale & retail | 2025 |
| 5 Gateways Ltd | Wholesale & retail | 2023 |
| 86 Honey Limited | Hospitality | 2025 |
| A & R Refrigeration Services Ltd | Construction | 2016 |
| A and Z Property Investment Ltd | Real estate | 2019 |
| A Bettercare Solution Ltd | Health & social care | 2022 |
| A M Plant Export Sales Ltd | Transport & logistics | 2026 |
| A Q Basketball CIC | Education | 2024 |
| A S MED Services Ltd | Health & social care | 2016 |
| A&N Road Haulage Ltd | Transport & logistics | 2022 |
| A&V Neagu Construction Ltd | Construction | 2025 |
| A.A.A.D Healthcare Limited | Health & social care | 2017 |
| A.J. Metal Work Ltd | Manufacturing | 2012 |
| A10-30 Care Ltd | Health & social care | 2023 |
| A2Z Merchandise Ltd | Wholesale & retail | 2020 |
| A4 and Co Limited | Health & social care | 2025 |
| AA Instant Construction Ltd | Manufacturing | 2023 |
| AA Smart Solutions Ltd | Transport & logistics | 2020 |
| AAC Electrical Ltd | Energy | 2016 |
| Aantoniuc Limited | Construction | 2019 |
| Aapex Construction Limited | Construction | 2017 |
| Aayanz Foods UK Limited | Hospitality | 2012 |
| Aazz Properties Ltd | Real estate | 2026 |
| AB Flooring Services Ltd | Construction | 2019 |
| Abbins Maintenance Limited | Other services | 2011 |
| Abdibaba Ltd | Hospitality | 2024 |
| Abdin Supps Limited | Wholesale & retail | 2024 |
| Abivos Ltd | Wholesale & retail | 2024 |
| Abiyom Ventures Ltd | Real estate | 2020 |
| Abound Consultancy Ltd | Professional & scientific | 2022 |
| AC Carpets and Flooring Ltd | Construction | 2021 |
| Ac/Jc Electrical Services Ltd | Construction | 2025 |
| Academia Made Easy Limited | Education | 2021 |
| Accc Services Ltd | Administrative & support | 2023 |
| Ace Services Solutions Limited | Agriculture & fishing | 2016 |
| ACL Inventories Limited | Administrative & support | 2023 |
| Acorn One Builders Ltd | Construction | 2026 |
| Action Cleaning and Renovation Limited | Administrative & support | 2009 |
| Active Motor Cars Limited | Wholesale & retail | 2025 |
| AD One Trans Ltd | Transport & logistics | 2026 |
| Adamg Ltd | Transport & logistics | 2019 |
| Adaptor Limited | Information & communication | 2013 |
| Ademcvs Limited | Hospitality | 2026 |
| Adephyl Facility Services Limited | Real estate | 2018 |
| Adetayo Odunuga Ltd | Other services | 2017 |
| Adeva Rail Ltd | Construction | 2025 |
| Adore Care Services Limited | Health & social care | 2016 |
| Adsam Limited | Construction | 2016 |
| Adubiz Ltd | Construction | 2023 |
| Advanced Teamworks Limited | Information & communication | 2022 |
| Aego Properties Ltd | Real estate | 2022 |
| AER Environmental Consultancy Ltd | Water & waste | 2013 |
| Aesthetics by SHA Ltd | Other services | 2025 |
| Aeternum Fratres Limited | Wholesale & retail | 2021 |
| Afcs Links Limited | Transport & logistics | 2017 |
| Afriaxias Services Ltd | Wholesale & retail | 2025 |
| African Caribbean Foods Ltd | Wholesale & retail | 2025 |
| AG Olowoporoku Limited | Health & social care | 2020 |
| Agarba Limited | Real estate | 2024 |
| Agboksarah Ltd | Health & social care | 2020 |
| AGG Trucks Ltd | Transport & logistics | 2025 |
| Agga Building Ltd | Construction | 2024 |
| Aglupu Ltd | Construction | 2018 |
| Agribiz Limited | Wholesale & retail | 2022 |
| AGV Construction Services Ltd | Construction | 2020 |
| AI-AGENT4U Limited | Information & communication | 2026 |
| Aims Associates Limited | Professional & scientific | 2021 |
| AK Healthcare Professional Ltd | Health & social care | 2025 |
| Akadis Ltd | Other services | 2017 |
| AKM Cargo Limited | Transport & logistics | 2026 |
| Akomapa Ltd | Health & social care | 2022 |
| AKR Traders Ltd | Wholesale & retail | 2024 |
| AL Fazal Foundation | Hospitality | 2023 |
| Alarancorp Ltd | Information & communication | 2025 |
| Alavato Transport Limited | Transport & logistics | 2025 |
| Alaye Holdings Ltd | Information & communication | 2026 |
| ALB Landscaping Group Ltd | Administrative & support | 2026 |
| Alecs Alex Ltd | Transport & logistics | 2017 |
| Alex (South London) Ltd | Transport & logistics | 2012 |
| Alex.Ro Transport Ltd | Transport & logistics | 2019 |
| Alexade Solution Limited | Information & communication | 2014 |
| Alexis Trans Ltd | Transport & logistics | 2021 |
| Alfiemoon Ltd | Transport & logistics | 2022 |
| Aliat Limited | Wholesale & retail | 2020 |
| Alliance Art UK Ltd | Professional & scientific | 2021 |
| Allstar Multi-Trade Limited | Construction | 2026 |
| ALM Training Services Limited | Education | 2005 |
| ALM UK Group Limited | Education | 2024 |
| Alpha Trinity Care Agency Limited | Health & social care | 2019 |
| ALR Logistics Ltd | Transport & logistics | 2022 |
| Altamsun Ltd | Wholesale & retail | 2026 |
| ALU Trans Ltd | Transport & logistics | 2024 |
| Alyi Logistic Ltd | Transport & logistics | 2021 |