| 1 Construct Ltd | Construction | 2024 |
| 106 Fore Street Trustee Limited | Extraterritorial | 2013 |
| 14 Brancaster Road Limited | Real estate | 2000 |
| 24 Seven Interiors Limited | Construction | 1999 |
| 26 South Villas Management Company Limited(The) | Professional & scientific | 1975 |
| 34 Bodriggy Street Management Company Limited | Households | 2021 |
| 3P Inc Limited | Real estate | 2022 |
| 8 Liston Road Ltd | Real estate | 2026 |
| A C Cossor & SON (Holdings) Limited | Financial services | 2018 |
| A C Cossor & SON (Technology) Ltd | Manufacturing | 2017 |
| A J Fitz Limited | Construction | 2015 |
| A-Lek Limited | Construction | 2005 |
| A. H. Hygienist Services Limited | Health & social care | 2014 |
| A1 Auto Technik Ltd | Wholesale & retail | 2018 |
| A2B Maintenance Solutions Ltd | Manufacturing | 2025 |
| A40 Farina Club Limited | Other services | 2008 |
| Aark Aviation Ltd | Manufacturing | 2022 |
| Access Electrical Installations Limited | Construction | 2005 |
| Activate IT Solutions Limited | Information & communication | 2008 |
| AEC Society Limited | Arts & recreation | 2004 |
| Agile Business Techniques Ltd | Professional & scientific | 2018 |
| AGT Electrics Limited | Construction | 2003 |
| AI Pathfinder Ltd | Professional & scientific | 2023 |
| Air Law Options Limited | Professional & scientific | 2003 |
| AJF Holdings Ltd | Financial services | 2022 |
| AK Comms Limited | Information & communication | 2009 |
| Aldeburgh Private Medical Services Ltd | Health & social care | 2023 |
| Alkma Limited | Real estate | 2010 |
| Alpha Ironwork Limited | Manufacturing | 2005 |
| Alphagate-Automation Ltd | Administrative & support | 2022 |
| Alpine Industrial Safety & Training Ltd | Wholesale & retail | 2008 |
| ALY PAY Limited | Information & communication | 2021 |
| Andrew Charles Projects Limited | Real estate | 1999 |
| ANN Paull and Co. Limited | Agriculture & fishing | 1965 |
| Anstey Investments Limited | Real estate | 2022 |
| Anstey Properties Limited | Real estate | 1979 |
| Anthony & Sons (Brokers) Limited | Wholesale & retail | 2023 |
| Antidote Apparel Limited | Wholesale & retail | 2025 |
| Antidote Clothing Limited | Extraterritorial | 2025 |
| Antoinette Limited | Wholesale & retail | 2011 |
| Antony Dubber Ltd | Professional & scientific | 2024 |
| Apex Shading Solutions Ltd | Construction | 2026 |
| Aprilfourteen Ltd | Professional & scientific | 2021 |
| Aquasheild Fire Protection Ltd | Public administration | 2025 |
| Ardlley Consultancy Limited | Information & communication | 2011 |
| Aridam Ltd | Water & waste | 2025 |
| Arnorla Group Limited | Real estate | 2026 |
| Arrakis Capital LP | | 2025 |
| ASA Property Developments Limited | Real estate | 2022 |
| ASA Property Limited | Real estate | 2015 |
| Ascension Staircase Solutions Limited | Construction | 2015 |
| Aspenden House Residents Association Limited | Households | 1987 |
| Associated Equipment Company Limited | Transport & logistics | 2004 |
| ATP Enable Limited | Information & communication | 2017 |
| ATR Psychology Limited | Health & social care | 2015 |
| Attend 2 IT Limited | Information & communication | 2009 |
| ATTEND2HEALTH Limited | Health & social care | 2013 |
| Autoclave Engineering & Maintenance Ltd | Manufacturing | 2013 |
| Autofix (Buntingford) Limited | Wholesale & retail | 2006 |
| Avlis Ltd | Construction | 2025 |
| Avon Engineering & Hydraulics Limited | Manufacturing | 2002 |
| Azincourt Consultancy Limited | Professional & scientific | 2010 |
| B & M Installtions (Ware) Limited | Construction | 2007 |
| B D Carpentry Limited | Construction | 2009 |
| Backdrop Ltd | Information & communication | 2005 |
| Backerslane Ltd | Information & communication | 2025 |
| Ball Spinning Co.Limited | Manufacturing | 1963 |
| Baobab Engineering Ltd | Manufacturing | 2015 |
| Barkip Biogas Holding Limited | Financial services | 2019 |
| Barkip Biogas Ltd | Energy | 2019 |
| Bates Elite Ltd | Agriculture & fishing | 2025 |
| Baystone Health Care Ltd | Administrative & support | 2023 |
| Bear Group Construction Ltd | Construction | 2025 |
| Bear Property & Lettings Ltd | Real estate | 2023 |
| Bear Weight Ltd | Wholesale & retail | 2025 |
| Beauty Industry Group Limited | Other services | 2020 |
| Beauville Building Services Limited | Construction | 2015 |
| Becalmconsult Ltd | Administrative & support | 2025 |
| Bee-Spoke Software Ltd | Information & communication | 2022 |
| Beem Health Support Limited | Manufacturing | 2025 |
| Beisser Tiling Limited | Construction | 2015 |
| Belina Consulting Limited | Households | 2003 |
| Bellevalia Limited | Construction | 2022 |
| Bennison Electrical Limited | Manufacturing | 2018 |
| Beskar Limited | Real estate | 2010 |
| BGB Property Limited | Real estate | 2018 |
| BI Folds & Windows Direct of Essex Ltd | Construction | 2020 |
| Big PIC Media Limited | Wholesale & retail | 2005 |
| BIO Capital 2 Ltd | Financial services | 2020 |
| BIO Capital Finance Limited | Financial services | 2020 |
| BIO Capital Holdings Limited | Financial services | 2020 |
| BIO Capital Ltd | Financial services | 2018 |
| Biogas OPS 2 Limited | Energy | 2024 |
| Birthing Calmly Limited | Health & social care | 2016 |
| Bishop's Stortford Community Sports Club Trading Limited | Hospitality | 2016 |
| Bishop’S Stortford Community Sports Club | Arts & recreation | 1978 |
| BKB Drainage and Pest Control Limited | Water & waste | 2025 |
| Black Horse Hospitality Limited | Hospitality | 2023 |
| Bliss Yoga & Wellness Ltd | Health & social care | 2021 |
| Blobfish.World Ltd | Wholesale & retail | 2025 |