| 1 Point 8 Ltd | Professional & scientific | 2017 |
| 100MYLYFE Ltd | Administrative & support | 2020 |
| 10TEN Auto Repairs Ltd | Wholesale & retail | 2025 |
| 13WC Limited | Real estate | 2021 |
| 1917 Straps Ltd | Wholesale & retail | 2024 |
| 1ST Choice Windows Waltham Limited | Construction | 2017 |
| 21ST Century Energy Solutions Limited | Construction | 2011 |
| 2N1 Ltd | Financial services | 2022 |
| 2T Holdings Limited | Financial services | 2013 |
| 3 Vine Street Limited | Information & communication | 2010 |
| 331 Consultancy Limited | Professional & scientific | 2016 |
| 360 Commercial Projects Limited | Construction | 2020 |
| 3DSPORTSWEAR Limited | Manufacturing | 2025 |
| 3H Group Limited | Real estate | 2017 |
| 41 Gladstone Road Management Company Limited | Real estate | 1985 |
| 42-44 Bridgford Road Limited | Real estate | 2026 |
| 44 Financial Limited | Financial services | 2010 |
| 5 Day Blinds Limited | Wholesale & retail | 2012 |
| 62 Mortimer Road Freehold Ltd | Households | 2004 |
| 6SCIENCE Ltd | Manufacturing | 2019 |
| 7 Couleurs Ltd | Professional & scientific | 2018 |
| 7TH Letter Ltd | Hospitality | 2020 |
| 9TEEN62 Ltd | Real estate | 2018 |
| A & C Smith Properties Ltd | Real estate | 2022 |
| A & S Holdings 2022 Limited | Real estate | 2022 |
| A & S Trading Limited | Wholesale & retail | 2001 |
| A and F Management Consultants Limited | Professional & scientific | 2011 |
| A B S Couriers Limited | Transport & logistics | 2019 |
| A E Faulks Limited | Construction | 1993 |
| A J Ward Farms Limited | Agriculture & fishing | 2023 |
| A L Electrics Ltd | Construction | 2012 |
| A M H Enterprise T/A New Apurba Limited | Hospitality | 2019 |
| A P Mason Ltd | Construction | 2011 |
| A S Alloy Fabrications Limited | Manufacturing | 2025 |
| A S Doors Ltd | Wholesale & retail | 2016 |
| A T Building & Maintenance Services Ltd | Construction | 2012 |
| A&Js Properties Ltd | Real estate | 2017 |
| A&M Pizza and Kebab Limited | Hospitality | 2019 |
| A. R. Peet Limited | Wholesale & retail | 2012 |
| A.A.S Ventures | Financial services | 2020 |
| A.C. PAT Testing Ltd | Professional & scientific | 2010 |
| A.J. Stimson & SON Limited | Real estate | 1967 |
| A.R. Signs Limited | Administrative & support | 2002 |
| A2 Systems Ltd | Education | 2022 |
| A2I Logistics Limited | Transport & logistics | 2008 |
| Aaram Candles Limited | Wholesale & retail | 2021 |
| Abercorris Cabins Limited | Households | 1976 |
| Access ALL Areas Training CIC | Information & communication | 2018 |
| Accord Compliance Limited | Financial services | 2021 |
| Achv Limited | Professional & scientific | 2014 |
| Acre Hill Farming Limited | Agriculture & fishing | 2011 |
| ACT TOO Theatre Company Ltd | Arts & recreation | 2025 |
| Active Crop Solutions Ltd | Agriculture & fishing | 2021 |
| Active Nurture Ltd | Education | 2020 |
| Active Soil Solutions Ltd | Agriculture & fishing | 2021 |
| AD Refrigeration Limited | Construction | 2025 |
| Adam DE Silva Photography Limited | Professional & scientific | 2018 |
| Adam Newton Building Contractor Ltd | Construction | 2015 |
| Adam Shaw Photography Limited | Professional & scientific | 2014 |
| Adcon Buildings Limited | Construction | 2022 |
| Addition Interiors Limited | Construction | 2019 |
| Adept Bespoke Project Solutions Ltd | Manufacturing | 2025 |
| Adfc Consulting Ltd | Information & communication | 2016 |
| ADG Hospitality Ltd | Wholesale & retail | 2014 |
| Adhoc On-Site Services Limited | Manufacturing | 2024 |
| Admc (Asset Design, Management and Compliance) Ltd | Professional & scientific | 2016 |
| ADN International Ltd | Wholesale & retail | 2017 |
| Adrian Roberts Ltd | Construction | 2011 |
| Adrian Wills Limited | Professional & scientific | 2010 |
| ADS Physiotherapy Ltd | Other services | 2022 |
| ADS Stove Spares Ltd | Wholesale & retail | 2025 |
| Advance & Progress Community Interest Company | Education | 2021 |
| Advanced Accounting Solutions Limited | Professional & scientific | 2010 |
| Advanced Gynaecology UK Limited | Health & social care | 2017 |
| Aerial & Security Solutions Ltd | Other services | 2019 |
| Aeroignis (UK) Limited | Professional & scientific | 2019 |
| Aeromarine Systems Ltd. | Wholesale & retail | 1994 |
| Aeronautx Ltd | Public administration | 2015 |
| Aesica Limited | Professional & scientific | 2025 |
| Aesthetic Inc. Pro Academy Ltd | Education | 2024 |
| Aether Holdings Limited | Manufacturing | 2009 |
| Agathos Limited | Professional & scientific | 2003 |
| AGC Telecoms Ltd. | Information & communication | 2012 |
| Agisen Limited | Professional & scientific | 2013 |
| Agro Business Consultants Limited | Information & communication | 1973 |
| AGS (Melton) Limited | Construction | 2025 |
| AI FLT & Driver Training Ltd | Education | 2023 |
| Aiila Ltd | Manufacturing | 2025 |
| Airfield Studio Limited | Other services | 2014 |
| Airrrr Ltd | Information & communication | 2023 |
| Airwaves Aerials Ltd | Construction | 2024 |
| AJ Consulting & Training Ltd. | Professional & scientific | 2016 |
| AJ Food Corp Ltd | Wholesale & retail | 2024 |
| AJ Hazard Farms LLP | | 2012 |
| AKB Works Ltd | Wholesale & retail | 2021 |
| ALB Psychological Services Ltd | Health & social care | 2025 |
| Alderaan Limited | Real estate | 2008 |
| Aldexi Limited | Wholesale & retail | 2015 |
| Alex Fairbrother Builders Ltd. | Construction | 2003 |
| Alexandra Dent Psychological Services Limited | Professional & scientific | 2015 |