| APM Project Management Ltd | Professional & scientific | 2017 |
| APM Property Solutions Ltd | Real estate | 2016 |
| Approved Care and Support Limited | Other services | 2016 |
| Approved Care Limited | Health & social care | 2017 |
| Approved Training Academy Limited | Health & social care | 2017 |
| Approved Window and Door Co Ltd | Construction | 2019 |
| Aptus Fire Limited | Professional & scientific | 2026 |
| ARB Survey Services Limited | Professional & scientific | 2013 |
| Architectural Commercial Developments Limited | Real estate | 2019 |
| Architectural Corporate Draughting Limited | Professional & scientific | 2009 |
| Areebaba Street Food Limited | Hospitality | 2020 |
| Argo Offshore Ltd | Professional & scientific | 2018 |
| ARK Pro Invest Limited | Real estate | 2024 |
| ARK PS Limited | Wholesale & retail | 2024 |
| Arkell Holdings Ltd | Financial services | 2022 |
| Aron MA Limited | Administrative & support | 2024 |
| Arridge Garage Doors Limited | Wholesale & retail | 2002 |
| Arry's Plumbing & Heating Ltd | Construction | 2025 |
| Art Bags Ltd | Manufacturing | 2023 |
| Artifice Creative Ltd | Information & communication | 2022 |
| Artificial Tree Company Limited | Wholesale & retail | 2018 |
| Arty's Nantwich Ltd | Hospitality | 2023 |
| AS Consultants (UK) Ltd | Information & communication | 2010 |
| Ascend Oswestry Ltd | Arts & recreation | 2025 |
| ASH Aggregates Limited | Water & waste | 2017 |
| ASH Group (UK) Limited | Water & waste | 2016 |
| ASH Group Limited | Extraterritorial | 2004 |
| ASH Heat and Power Limited | Water & waste | 2016 |
| ASH Land Companies Limited | Water & waste | 2018 |
| ASH Metal Recycling Limited | Water & waste | 2005 |
| ASH Resource Management (Cambrian Quarry) Limited | Water & waste | 2009 |
| ASH Waste Services Limited | Water & waste | 2007 |
| Asinki Limited | Information & communication | 2026 |
| Aslan Jewellery Limited | Wholesale & retail | 2014 |
| Asmara Property Management Ltd | Households | 2019 |
| Aspire Health Group Ltd | Health & social care | 2023 |
| Asset Wealth Preservation Limited | Professional & scientific | 2017 |
| Assistive IOT Ltd | Education | 2018 |
| Astral Panda Ltd | Professional & scientific | 2017 |
| ATD Brand Limited | Extraterritorial | 2025 |
| Atelier Bridal Wear Studio LLP | | 2016 |
| Atherton Bikes Limited | Manufacturing | 2018 |
| Atherton Group Holdings Limited | Agriculture & fishing | 2018 |
| Atherton Racing Ltd | Arts & recreation | 2011 |
| Atlantic Europe Publishing Company Limited | Information & communication | 1990 |
| Atlas Tractors Ltd | Agriculture & fishing | 2009 |
| Attfield Theatre Company Limited | Arts & recreation | 2000 |
| Atws Developments Ltd | Construction | 2021 |
| Audio Tech Direct Limited | Wholesale & retail | 2014 |
| Avenue Four Limited | Manufacturing | 2012 |
| AWN Electrical Ltd | Construction | 2020 |
| Axholme Contracting Limited | Construction | 2025 |
| B & B Jones (Properties) Ltd | Real estate | 2022 |
| B & D Williams Ltd | Hospitality | 2017 |
| B and B Jones Limited | Agriculture & fishing | 2008 |
| B Fraser Plumbing Ltd | Construction | 2026 |
| B I Developments Limited | Construction | 2015 |
| B&T Sporting Events Ltd | Arts & recreation | 2018 |
| B.S. Evans & Company Limited | Construction | 1960 |
| Baba-Yaga Balkan Food Ltd | Manufacturing | 2026 |
| Babbinswood Organic Farm Ltd | Manufacturing | 2021 |
| Bailey Head Limited | Hospitality | 2015 |
| Baileys Meade Limited | Real estate | 2025 |
| Bake Baby Ltd | Manufacturing | 2025 |
| Barbara Simmons Limited | Health & social care | 2013 |
| Bargain World (Oswestry) Ltd | Wholesale & retail | 2022 |
| Barker Property & Assets Limited | Real estate | 2025 |
| Barn Medical Group Limited | Extraterritorial | 2025 |
| Barnes & Mullins (Manufacturing) Limited | Manufacturing | 1959 |
| Barnes & Mullins Limited | Manufacturing | 1977 |
| Barraclough Brown Estates Limited | Hospitality | 2016 |
| Barrs Tyres Limited | Wholesale & retail | 2015 |
| Baxter Equine Services Limited | Information & communication | 2015 |
| Bbfiber Limited | Information & communication | 2026 |
| BBR Opticians Limited | Wholesale & retail | 2010 |
| BCS Auto Repairs Limited | Wholesale & retail | 2024 |
| BCW Foods Consultancy Limited | Professional & scientific | 2021 |
| BCW Foods Limited | Real estate | 2010 |
| BE a Better Fish Ltd | Administrative & support | 2019 |
| Beacon Garage Doors Limited | Construction | 2005 |
| Beaumont Financial Planners Limited | Financial services | 2013 |
| Beehive Bookkeeping Services Limited | Professional & scientific | 2023 |
| Behr Bircher Cellpack BBC UK Ltd | Wholesale & retail | 2022 |
| Beleva Limited | Real estate | 2016 |
| Belle Logistics Limited | Information & communication | 2022 |
| Berghill Enterprises Limited | Construction | 2008 |
| Berkeley HR Limited | Administrative & support | 2022 |
| Bertlec Ltd | Construction | 2023 |
| Bespoke and Batch Engineering Limited | Manufacturing | 2016 |
| Better World CB Limited | Financial services | 2020 |
| Beyond Limits Sports C.I.C. | Education | 2024 |
| BFL Manufacturing Ltd | Manufacturing | 2022 |
| BH Equestrian Ltd | Agriculture & fishing | 2025 |
| Bibsy Morgan Ltd | Construction | 2026 |
| Big Bear Lodge Limited | Hospitality | 2015 |
| Big Pond Ltd | Professional & scientific | 2011 |
| Biomass Boiler Parts Ltd | Wholesale & retail | 2022 |
| Birch & Sons General Building Ltd | Construction | 2021 |
| Birch Travel Limited | Transport & logistics | 1998 |
| Bird Brain Games Limited | Information & communication | 2025 |