| ASH Motors (NW) Limited | Wholesale & retail | 2013 |
| Atebion Futures Ltd | Health & social care | 2025 |
| Atlantic Wealth Consultancy Ltd | Administrative & support | 2008 |
| Atlas AI Partners Ltd | Information & communication | 2025 |
| Augustus Ltd. | Professional & scientific | 2020 |
| AW Engines Ltd | Wholesale & retail | 2023 |
| Axxiant Limited | Information & communication | 2002 |
| Azgard Apparel Ltd | Wholesale & retail | 2019 |
| Azim Medical Limited | Health & social care | 2016 |
| B L H Trading (NW) Ltd | Wholesale & retail | 2025 |
| B Lloyd Investment Management Limited | Real estate | 2013 |
| Back Doctor Clinic Ltd | Other services | 2022 |
| Bass Rebels Ltd | Information & communication | 2021 |
| Bateman Jarvis Limited | Financial services | 2003 |
| Bay Interiors (NW) Limited | Construction | 2014 |
| Bay Tree Aesthetics Ltd | Other services | 2020 |
| BCD Services (NW) Ltd | Professional & scientific | 2011 |
| Beaut Clinic Chester Limited | Other services | 2023 |
| Bedford Homes (NW) Limited | Construction | 2025 |
| Bedw Limited | Construction | 2001 |
| Beech Developments (Pinewood) Limited | Construction | 2018 |
| BEN Rogers Enterprises Limited | Other services | 2015 |
| Bentley Catering Ltd | Hospitality | 2026 |
| Best Barber Shop ST Asaph Ltd | Other services | 2026 |
| Best Local Ltd | Wholesale & retail | 2026 |
| Betolmin Investments Limited | Households | 1965 |
| Betterbedcompany Ltd | Wholesale & retail | 2018 |
| Bianca Simone Hair and Beauty Limited | Other services | 2013 |
| Bike N Bunk Limited | Hospitality | 2018 |
| Bingham AIM Ltd | Construction | 2021 |
| Bio-Check (UK) Limited | Manufacturing | 2008 |
| Blackwell's Stonecraft Limited | Other services | 2001 |
| Blue Cherry Care Services Ltd | Health & social care | 2026 |
| Blue Rectangle Group LLP | | 2022 |
| Blue Water NW Ltd | Other services | 2020 |
| Blueman and Brown Property Developments Ltd | Real estate | 2023 |
| Blueman and Brown Property Management Ltd. | Real estate | 2024 |
| BOB Francis Crane Hire Limited | Construction | 1997 |
| BOD ERW Dining Ltd | Hospitality | 2011 |
| Bodelwyddan Caravan Storage Limited | Other services | 2014 |
| Bodelwyddan Investments Ltd | Real estate | 2022 |
| BON Accord Group Ltd | Real estate | 2021 |
| Bonchester Bridge Riverside Park Limited | Wholesale & retail | 2020 |
| Boobify Limited | Wholesale & retail | 2024 |
| Botteau Offshore Site Services Ltd | Construction | 2013 |
| Boutique Holiday Parks Limited | Hospitality | 2017 |
| Boutique Resorts Limited | Hospitality | 2013 |
| Bowyer Cassidy Estate Limited | Households | 2021 |
| Brad Developments Ltd | Real estate | 2020 |
| Bradshaw Hall Ltd | Other services | 2024 |
| Bramwell Holdings NW Ltd | Financial services | 2026 |
| Bravura Inspection Ltd | Professional & scientific | 2019 |
| Brereton Property Ltd | Construction | 2023 |
| Brett Johns Limited | Construction | 2013 |
| Bridgwater Associates Limited | Other services | 2014 |
| Bright Bin's Limited | Administrative & support | 2009 |
| Brindle Lifting Solutions Limited | Construction | 2011 |
| Briqua Limited | Information & communication | 2026 |
| Brolsh Limited | Administrative & support | 2023 |
| Brookes Property Development Ltd | Real estate | 2024 |
| Brookhouse Caravan Storage Ltd | Other services | 2021 |
| Brookwell Homes Ltd | Real estate | 2021 |
| Bryn Y Gwynt Developments Limited | Energy | 2013 |
| Bryn Y Gwynt Limited | Energy | 2011 |
| Bryniau Clwyd Ltd | Hospitality | 2024 |
| Buchanan Productions Ltd | Professional & scientific | 2015 |
| Buddie (NW) Limited | Other services | 2020 |
| Bungalow Holdings Limited | Real estate | 2016 |
| Butteez Limited | Hospitality | 2022 |
| Bygd HF Limited | Energy | 2024 |
| C J Mcallister Properties Ltd | Households | 2024 |
| C Pilling Services Ltd | Other services | 2019 |
| C S Assessments Ltd | Health & social care | 2020 |
| Cable & ROV Solutions Ltd | Professional & scientific | 2020 |
| Cable AIM Ltd | Professional & scientific | 2020 |
| CAE Swch Developments Ltd | Construction | 2022 |
| Cailan Ltd | Professional & scientific | 2014 |
| Calm Potential Ltd | Health & social care | 2024 |
| Calming the Storm Ministries Ltd | Administrative & support | 2023 |
| Cambrian Autospares Limited | Wholesale & retail | 2006 |
| Cambrian Ecology Limited | Professional & scientific | 2015 |
| Campaign for My Brain Ltd | Other services | 2019 |
| Campform Ltd | Wholesale & retail | 2025 |
| Caplin TEC Limited | Manufacturing | 2023 |
| Carbon Trading 247 Ltd | Professional & scientific | 2024 |
| CARBON247 Limited | Other services | 1983 |
| CARBON365 Limited | Professional & scientific | 2022 |
| Cardrews Media Limited | Information & communication | 2013 |
| Carl Foster Contracting Limited | Construction | 2024 |
| Carlton Garden Buildings Ltd | Wholesale & retail | 2025 |
| Cartrefi Dolwen Ltd | Construction | 2021 |
| Cassmart Ltd | Real estate | 2020 |
| Castle Commercial EPC Ltd | Other services | 2023 |
| Castle EPC Limited | Other services | 2019 |
| Castle Rental Properties Ltd | Real estate | 2023 |
| Cathay Garden Limited | Hospitality | 2019 |
| CBL Consultancy Ltd | Professional & scientific | 2025 |
| Cefn DU R&D Limited | Professional & scientific | 2017 |
| CEH Engineering Ltd | Construction | 2021 |
| Cenarth Falls Resort Ltd | Hospitality | 2021 |