| 10 Highview Management Limited | Households | 2022 |
| 15 SHP 1ST Floor TTE Ltd | Real estate | 2022 |
| 1START Logistics Ltd | Transport & logistics | 2020 |
| 2020SCAFFOLDING Ltd | Construction | 2019 |
| 2A Cares Limited | Health & social care | 2026 |
| 2CV Adventures Limited | Administrative & support | 2014 |
| 2FBD Ltd | Construction | 2021 |
| 3 Counties Bridge Ltd | Arts & recreation | 2020 |
| 313 Roofing Ltd | Construction | 2023 |
| 350 Burger Ltd | Hospitality | 2021 |
| 350 Group Ltd | Financial services | 2025 |
| 365 Consultants and Training Ltd | Information & communication | 2023 |
| 3BS Limited Company Ltd | Administrative & support | 2019 |
| 3Q Financial Limited | Financial services | 2020 |
| 4 Elmfield Court (Lindford) Limited | Professional & scientific | 2007 |
| 4 Your Long Hair Ltd | Manufacturing | 2024 |
| 69 Weydon Ltd | Real estate | 2019 |
| 75 Weydon Ltd | Real estate | 2018 |
| 81 Weydon Ltd | Real estate | 2018 |
| 8TH Note Limited | Arts & recreation | 2015 |
| 9 Yards Entertainment Ltd | Arts & recreation | 2023 |
| 9 Yards Events CIC | Arts & recreation | 2025 |
| A.T. Finance Limited | Wholesale & retail | 2004 |
| A3 Contracts (UK) Limited | Construction | 2023 |
| A3 Shopfitting & Joinery Limited | Construction | 2005 |
| AB Initio Systems Ltd | Information & communication | 2012 |
| ABC Education Limited | Education | 2019 |
| ABC Tutoring Ltd | Education | 2024 |
| Abel Education Limited | Education | 2011 |
| Abok Motors Limited | Wholesale & retail | 2025 |
| Abounding Support & Care Ltd | Public administration | 2019 |
| Ace Automotive Repairs Limited | Administrative & support | 2017 |
| Acec Electrical Ltd | Construction | 2020 |
| ACG & Associates Limited | Professional & scientific | 2024 |
| Acorn Brickwork Limited | Construction | 2006 |
| Acorn Lane Management Company Limited | Real estate | 2006 |
| Acorns Coffee and Cake Ltd | Hospitality | 2020 |
| Acorns Coffee Roastery Ltd | Manufacturing | 2024 |
| Acorns Sweets and Treats Limited | Wholesale & retail | 2026 |
| ACW Rigging Services Ltd | Construction | 2025 |
| AD Septic Tanks Ltd | Water & waste | 2026 |
| Adelco Screen Process Limited | Manufacturing | 1972 |
| Adiglaze Ltd | Construction | 2019 |
| Administer Software Limited | Information & communication | 2004 |
| Adonai Solutions Ltd | Health & social care | 2012 |
| Advanced IT Security Ltd | Administrative & support | 2018 |
| Aerial Imaging Ltd | Information & communication | 2025 |
| Aflyt Ltd | Wholesale & retail | 2025 |
| African Foods International Limited | Wholesale & retail | 2025 |
| Afterburn Fitness Ltd | Arts & recreation | 2021 |
| Afterburn Gym Limited | Arts & recreation | 2023 |
| Agilica Consulting Limited | Information & communication | 2016 |
| Agor Logistics Ltd | Administrative & support | 2020 |
| Aimonki Ltd | Information & communication | 2024 |
| Air Conditioning Work Limited | Manufacturing | 2014 |
| AJF Automotive Ltd | Wholesale & retail | 2021 |
| AKH Construction UK Ltd | Construction | 2023 |
| Alex Dewey Plumbing and Heating Ltd | Other services | 2023 |
| Alexia VA Ltd | Administrative & support | 2021 |
| Alice Social Care Limited | Health & social care | 2013 |
| Alkeon Limited | Financial services | 2024 |
| ALL Inclusive Disability Consultants Community Interest Company | Professional & scientific | 2008 |
| ALL SO Retro Limited | Wholesale & retail | 2021 |
| ALL Weather Roofing Division Ltd | Construction | 2023 |
| ALL Wood Solutions Limited | Wholesale & retail | 2024 |
| Allf Property Ltd | Real estate | 2021 |
| Allglass and Frameworks Limited | Manufacturing | 2009 |
| Allied Nursing and Care Solutions Ltd | Health & social care | 2023 |
| Alna Home Ltd | Manufacturing | 2025 |
| Alpcarpentry Ltd. | Construction | 2005 |
| Alphabet Signs (Commercial) Ltd | Professional & scientific | 2015 |
| Alpina Consulting Services Ltd | Information & communication | 2023 |
| Alton Transport Storage Limited | Transport & logistics | 2017 |
| AMI Creative Solutions Ltd | Professional & scientific | 2002 |
| Amity Care Group Ltd | Health & social care | 2025 |
| Amos Legal Services Ltd | Professional & scientific | 2019 |
| Anako Management Services Limited | Information & communication | 2023 |
| AND Another Day Ltd | Information & communication | 2024 |
| Andrew Ferguson Limited | Health & social care | 2003 |
| Aneesh Property Ltd | Real estate | 2024 |
| Anglia Transformers Limited | Manufacturing | 1965 |
| Anglian Enterprises Limited | Professional & scientific | 1972 |
| Annie's Beauty & Aesthetics Ltd | Other services | 2025 |
| APB Forestry Ltd | Agriculture & fishing | 2020 |
| APB Marvelex Ltd | Construction | 2022 |
| Apex Cover Ltd | Administrative & support | 2026 |
| Apple Dexters Ltd | Agriculture & fishing | 2023 |
| Arcta Solutions Ltd | Information & communication | 2017 |
| Argonaut Consulting Limited | Information & communication | 2007 |
| Arisam Capital Ltd | Administrative & support | 2026 |
| ARK Home Care Ltd | Construction | 2023 |
| Armstrong Ventures Limited | Professional & scientific | 2021 |
| Artisanale Limited | Manufacturing | 2002 |
| Arton Monoseal Limited | Construction | 2003 |
| Aryaba Works Ltd | Manufacturing | 2025 |
| Ascenza International Ltd | Administrative & support | 2025 |
| Ashcombe Border Group Limited | Administrative & support | 1986 |
| Ashmead Residents Company Limited | Households | 1979 |
| Asmodee UK Holding Limited | Wholesale & retail | 2018 |
| Aspatria Management Company Ltd | Real estate | 2023 |