| 1000 Rooms Crewe Ltd | Real estate | 2018 |
| 1000 Rooms Stoke Ltd | Real estate | 2018 |
| 104 Richmond ST. Ltd | Real estate | 2024 |
| 11S Capital Limited | Financial services | 2022 |
| 11S Consulting Limited | Administrative & support | 2017 |
| 122 Henry Street Ltd | Real estate | 2018 |
| 19SEVENTYONE Ltd | Information & communication | 2023 |
| 248 London Road Ltd | Construction | 2018 |
| 301 West Street Ltd | Real estate | 2018 |
| 3D Print Forge Ltd | Manufacturing | 2025 |
| 3REIN Ltd | Health & social care | 2016 |
| 42 Minshull New Road Ltd | Real estate | 2018 |
| 71 Lower Bethesda Street Ltd | Real estate | 2019 |
| 73 Lower Bethesda ST. Limited | Real estate | 2025 |
| 90C Broomfield Road Limited | Real estate | 2017 |
| 98 Beauty Spa Ltd | Other services | 2026 |
| A & D Homecare Ltd | Health & social care | 2020 |
| A Apostolou Ltd | Health & social care | 2016 |
| A Better Company Ltd | Professional & scientific | 2025 |
| A J R Services Limited | Financial services | 2008 |
| A&Co Limited | Hospitality | 2021 |
| A.M.O.S. Properties Limited | Construction | 1987 |
| A1 Sandblasting Limited | Administrative & support | 2021 |
| Abigail's Delicatessen Limited | Hospitality | 2013 |
| Abigail's Lifestyle Limited | Wholesale & retail | 2010 |
| ABS Consultants (Holdings) Limited | Information & communication | 1995 |
| Access Anyone Limited | Transport & logistics | 2006 |
| Accountancy Essex Limited | Professional & scientific | 2013 |
| Acolys Limited | Professional & scientific | 2024 |
| Acorn Consultancy Services Ltd | Professional & scientific | 2026 |
| ACT Homes Limited | Construction | 2020 |
| ADL Capital Limited | Real estate | 2025 |
| Advanced Sedation Ltd | Health & social care | 2015 |
| Aedis Construction Ltd | Construction | 2023 |
| Aedis Holdings Limited | Real estate | 2018 |
| Aedis Homes (Braintree) Limited | Real estate | 2020 |
| Aedis Homes (Gosfield) Limited | Real estate | 2022 |
| Aedis Homes (Stock) Limited | Real estate | 2022 |
| Aedis Homes Limited | Real estate | 2012 |
| Aegis Networks UK Limited | Information & communication | 2022 |
| Affinity Fostering Services Ltd | Administrative & support | 2013 |
| Affinity Security Limited | Administrative & support | 2012 |
| AI Autocentre Ltd | Wholesale & retail | 2023 |
| AI for Property Ltd | Information & communication | 2025 |
| AI Welding Limited | Manufacturing | 2026 |
| Alastor Fiduciary & Probate Ltd | Professional & scientific | 2019 |
| Alberic Limited | Professional & scientific | 2016 |
| Albreg Services Limited | Professional & scientific | 2017 |
| Alex Dumas Limited | Real estate | 2012 |
| Alhb Properties Ltd | Real estate | 2021 |
| ALI Kurr Ltd | Arts & recreation | 2017 |
| ALL4ONE Care Services Limited | Health & social care | 2021 |
| Allied Projects Limited | Administrative & support | 1998 |
| Alwan Essex Limited | Arts & recreation | 2024 |
| AMA Group Ltd | Professional & scientific | 2003 |
| Amaquella Investments Limited | Real estate | 2020 |
| Amaquella Ltd | Administrative & support | 2015 |
| Amaze & Graze Limited | Hospitality | 2020 |
| Amco Building Services Ltd | Construction | 2012 |
| Amega-Rail Consultants Limited | Transport & logistics | 2021 |
| Amicus Civil Engineering Limited | Construction | 2012 |
| Amicus Engineering Services Limited | Construction | 2012 |
| Amidhara Limited | Education | 2024 |
| Amigo Motorsport Limited | Arts & recreation | 2026 |
| Amplify Electrics Ltd | Construction | 2024 |
| ANB Solutions Ltd | Professional & scientific | 2011 |
| Anchor Ridge Ltd | Real estate | 2025 |
| Andjo Derivatives Ltd | Financial services | 2001 |
| Androomedia Limited | Wholesale & retail | 2020 |
| Anglia Broker Compliance Limited | Professional & scientific | 2010 |
| Anglo European Academy Trust | Education | 2011 |
| Anglo European Education Trust | Education | 2011 |
| Anna Batchelor Limited | Professional & scientific | 2012 |
| ANV Developments Ltd | Construction | 2019 |
| Aquature Ltd | Manufacturing | 2022 |
| Arbitrium Properties Ltd | Real estate | 2019 |
| Arbor Group (SWF) Limited | Financial services | 2020 |
| Arbor Holdings Ltd | Financial services | 2016 |
| Arcova Lighting Ltd | Manufacturing | 2026 |
| Artisan Tiling Contracts Limited | Construction | 2007 |
| Ascending Arbs Tree Services Limited | Agriculture & fishing | 2013 |
| Ashmore Living Ltd | Real estate | 2025 |
| Ashridge Grange Management Limited | Households | 2022 |
| Assentra Limited | Professional & scientific | 2012 |
| Association of Illustrators Limited(The) | Other services | 1975 |
| Atcm Limited | Professional & scientific | 2003 |
| Athena Consultancy Services Ltd | Professional & scientific | 2021 |
| ATO Consulting Ltd | Professional & scientific | 2015 |
| Auco Energy Limited | Wholesale & retail | 2020 |
| Authentic Designs Limited | Professional & scientific | 2006 |
| Aviary Property Management Ltd | Real estate | 2022 |
| Axia Valuation Services Limited | Extraterritorial | 2015 |
| AYS1 Limited | Professional & scientific | 2024 |
| Azsam Limited | Health & social care | 2017 |
| B Putney & Sons Property Services Limited | Construction | 2022 |
| Bacchus Design Limited | Professional & scientific | 2015 |
| Bacchus Developments Limited | Extraterritorial | 2014 |
| Bakehouse Properties Limited | Real estate | 2020 |
| Bakers Field Residents (Management) Company Limited | Households | 2001 |
| Baric LP | | 2024 |