| 1 Barrowgate Road (London) Limited | Real estate | 2002 |
| 13 Tavistock Place Limited | Households | 2003 |
| 1632 Group Limited | Hospitality | 2019 |
| 1UP PR Limited | Professional & scientific | 2022 |
| 37 Leyton Road Management Company Ltd. | Households | 1992 |
| 37 Silver Street Ashwell Limited | Real estate | 2011 |
| 86 Edge Ltd | Information & communication | 2025 |
| A & M Mortimer Properties Limited | Real estate | 2019 |
| A & R Holdings (London) Limited | Financial services | 2017 |
| A Leonard Limited | Construction | 2000 |
| A. Stutley & Sons Limited | Agriculture & fishing | 1932 |
| A.E. & W.A.Farr Limited | Agriculture & fishing | 1958 |
| Abacus Marquee & Event Hire Ltd | Administrative & support | 2017 |
| ABC Tax Accountants Limited | Professional & scientific | 2015 |
| Acapella Publishing Resources Limited | Professional & scientific | 2008 |
| Access Learning Ltd | Education | 2022 |
| Accipitris Limited | Information & communication | 2013 |
| Adept Property Management Ltd | Real estate | 2011 |
| Aerth Inc Limited | Information & communication | 2024 |
| Aidem Services Ltd | Information & communication | 2015 |
| AIM FAB Sheet Metal Limited | Manufacturing | 2017 |
| Ajls Consortium Limited | Professional & scientific | 2017 |
| AJS Construct Ltd | Construction | 2020 |
| AKS Carz Ltd | Administrative & support | 2023 |
| Aksg Ltd | Hospitality | 2023 |
| Albb Consulting Ltd | Professional & scientific | 2024 |
| Aldridge Court Limited | Administrative & support | 1998 |
| Alex Firth Consulting Limited | Professional & scientific | 2006 |
| ALL Saints Green Dental Clinic Ltd | Health & social care | 2011 |
| Allrounduk Building & Construction Ltd | Construction | 2011 |
| Alpha Pharmaceuticals Ltd | Wholesale & retail | 2013 |
| Alpine Building Solutions Ltd | Construction | 2026 |
| Aluminium & Marine Fittings Ltd | Wholesale & retail | 2020 |
| Amber Osteopathy Limited | Health & social care | 2008 |
| Aminatah Limited | Health & social care | 2020 |
| Anaiah Entertainment Ltd | Hospitality | 2026 |
| Andrew Beswick Design Limited | Professional & scientific | 2026 |
| Antwerp House Group Ltd | Financial services | 2025 |
| ANY Abode Limited | Real estate | 2022 |
| AOG Part Suppliers Limited | Wholesale & retail | 2025 |
| AOG Work Limited | Transport & logistics | 2022 |
| Apex Brickwork Limited | Construction | 2023 |
| Apollo Dental Interiors Limited | Extraterritorial | 2015 |
| Apollo Holdings Limited | Extraterritorial | 2015 |
| Apollo Interiors Limited | Construction | 2010 |
| Apollo Property Developments Limited | Construction | 2015 |
| Apple Cottage Cider Limited | Manufacturing | 2012 |
| Appleby Studio Ltd | Professional & scientific | 2019 |
| Appledownton Limited | Financial services | 2014 |
| Aqua Go Ltd | Administrative & support | 2025 |
| Aqua in Ltd | Administrative & support | 2026 |
| Arabica AI Ltd | Information & communication | 2025 |
| Arabica Transformation Consulting Limited | Professional & scientific | 2020 |
| Archie Davies 87 Motorsport Ltd | Arts & recreation | 2025 |
| Artcan | Other services | 2016 |
| Ashwell Crop Services Ltd | Administrative & support | 2025 |
| Ashwell Garage Limited | Wholesale & retail | 2008 |
| Ashwell PUB Company Limited | Hospitality | 2024 |
| Ashwell Surveyors Limited | Professional & scientific | 2016 |
| Assemble Labs Ltd | Information & communication | 2026 |
| Atkin and Thyme Ltd | Wholesale & retail | 2013 |
| Atlas Handling Limited | Manufacturing | 1997 |
| Avant Consultancy Ltd | Manufacturing | 2008 |
| Avenger Electrics Ltd | Construction | 2023 |
| AWB Electrical Services Ltd | Construction | 2020 |
| B D Electrical Contractors Limited | Construction | 2008 |
| B K Services Limited | Wholesale & retail | 2005 |
| B&E Tools Limited | Manufacturing | 2014 |
| B. K. Services & Co Limited | Professional & scientific | 2012 |
| Bacons Court (Ashwell) Residents Association Limited | Households | 1980 |
| Balance the Books Limited | Professional & scientific | 2021 |
| Baldock Community Forum CIC | Arts & recreation | 2017 |
| Baldock Express Delivery Ltd | Hospitality | 2025 |
| Baldock Festival CIC | Arts & recreation | 2022 |
| Baldock Industrial Estate Limited | Real estate | 1982 |
| Baldock Lettings Limited | Real estate | 2018 |
| Baldock Mini Market Ltd | Wholesale & retail | 2015 |
| Baldock Nail Spa Limited | Other services | 2025 |
| Baldock Self Storage Ltd | Real estate | 2015 |
| Baldock Town Hall Limited | Arts & recreation | 2011 |
| Baldock VEL Ltd | Wholesale & retail | 2025 |
| Baldock Veterinary Services Limited | Professional & scientific | 2011 |
| Baldwin Consultancy Services Ltd | Professional & scientific | 2024 |
| Baldwin Productions Ltd | Information & communication | 2025 |
| Balstock CIC | Arts & recreation | 2022 |
| Barkham Consulting Limited | Professional & scientific | 2006 |
| BCT Partners LLP | | 2025 |
| Beacon Developments (Ashwell) Limited | Manufacturing | 1983 |
| Beauty 2 the MAX Academy Limited | Other services | 2025 |
| Beauty 2 the MAX Mentoring Ltd | Professional & scientific | 2024 |
| Bedfordshire Beard Co. Limited | Wholesale & retail | 2015 |
| Believe & Achieve Living Ltd | Real estate | 2019 |
| Bell Forklift Trucks Limited | Administrative & support | 2017 |
| Bell ROW Property Co Ltd | Construction | 2026 |
| Belle and BEE Beauty X Baldock Ltd | Other services | 2025 |
| Beswick Building and Renovations Limited | Construction | 2014 |
| Beswick Building Limited | Real estate | 2020 |
| Beswick Design & Build Limited | Real estate | 2020 |
| Bhatighar Limited | Hospitality | 2025 |
| Big Ron's Scaffolding Ltd | Construction | 2021 |