| Bay Air Ltd | Extraterritorial | 2023 |
| Bayside Consultancy Limited | Professional & scientific | 2024 |
| BB Garage Limited | Wholesale & retail | 2025 |
| BBS Media CIC | Information & communication | 2025 |
| BCA Vehicle Deliveries Limited | Transport & logistics | 2016 |
| BDH (NW) Ltd | Real estate | 2026 |
| Beech Tree Joinery Limited | Construction | 2015 |
| Belle Hill Limited | Other services | 2008 |
| Belle Lueur Bridal Ltd | Wholesale & retail | 2023 |
| Bellevue (North) Limited | Construction | 2025 |
| BEN Polkinghorn Groundworks Limited | Construction | 2016 |
| BEN Thompson Ltd | Manufacturing | 2011 |
| Bender Medical Services Limited | Extraterritorial | 2001 |
| Bender UK Limited | Wholesale & retail | 1996 |
| Bengal Rose Ltd | Hospitality | 2021 |
| BEP REN Ltd | Professional & scientific | 2024 |
| Bethel the Lakes Ltd | Wholesale & retail | 2020 |
| Birchwood Care Dixon Ltd | Health & social care | 2025 |
| BJ Croasdale Limited | Administrative & support | 2015 |
| BJ Croasdale Properties Ltd | Real estate | 2025 |
| Blackledges Deli Limited | Wholesale & retail | 2022 |
| Blackthorn Commercial Consultancy Limited | Professional & scientific | 2021 |
| Blakerin International Holdings Limited | Hospitality | 2012 |
| Bleasdale Wand Limited | Professional & scientific | 2003 |
| Blue and White Knights Limited | Other services | 2023 |
| Blue Box Innovation Limited | Education | 2015 |
| Blue Vision Group Limited | Construction | 2025 |
| Bluebell & IVY Limited | Wholesale & retail | 2019 |
| Bluefield Holdings Limited | Financial services | 2021 |
| Blueprint Design Engineering Limited | Manufacturing | 2006 |
| Bluetang Software Limited | Administrative & support | 2014 |
| Boardman Transformers Limited | Manufacturing | 1959 |
| Bonnie and Beaux Limited | Health & social care | 2018 |
| Boosh Design Limited | Construction | 2026 |
| Bourn Interiors Ltd | Professional & scientific | 2014 |
| Bouthray Fisheries Limited | Extraterritorial | 1960 |
| Bowfell Properties Limited | Construction | 2017 |
| BP Communications Limited | Information & communication | 2003 |
| Brackenber Developments Limited | Construction | 2010 |
| Brackenber Estates Limited | Other services | 2010 |
| Bradford Training Solutions Limited | Education | 2011 |
| Brady Garden & Landscape Services Limited | Other services | 2014 |
| Braithwaite Painting and Decorating Limited | Construction | 2013 |
| Brambles (Ulverston) Limited | Wholesale & retail | 2004 |
| Brian Benson Building Services Limited | Construction | 2012 |
| Brizzolaris Sulla VIA Ltd | Hospitality | 2026 |
| Broughton Financial Services Ltd. | Professional & scientific | 1997 |
| BTL Holdings Limited | Extraterritorial | 2016 |
| Buckbarrow Limited | Administrative & support | 2018 |
| Build South Lakes Ltd | Construction | 2023 |
| Building Bridges (North West) Ltd | Real estate | 2025 |
| Bull Nose Guard Ltd | Wholesale & retail | 2025 |
| Bunkychunks Limited | Administrative & support | 2017 |
| C.G. Plastering Service Limited | Construction | 2004 |
| Cannon Close Properties Ltd | Real estate | 2019 |
| Caresafe Solutions Limited | Professional & scientific | 2023 |
| Cartmel Conservation Limited | Professional & scientific | 2020 |
| Cartmel Solutions Limited | Professional & scientific | 2014 |
| Caspian Cumbria Ltd | Hospitality | 2026 |
| Castaways Properties Limited | Households | 2023 |
| Castle Combe Properties Ltd | Real estate | 2020 |
| Catena JV Limited | Professional & scientific | 2018 |
| Cater-Kwik (Holdings) Limited | Construction | 2013 |
| Cater-Kwik Developments Limited | Hospitality | 2016 |
| Cater-Kwik Group Limited | Financial services | 2016 |
| Cater-Kwik Investments Limited | Extraterritorial | 2016 |
| Cater-Kwik Limited | Wholesale & retail | 2002 |
| Caterent Limited | Real estate | 2025 |
| Caterkwik Fabs Limited | Manufacturing | 2014 |
| Cavendish House Apartments Management Company Limited | Real estate | 2006 |
| Cavendish Street Management Company Limited | Households | 2015 |
| CB Arts Ltd | Manufacturing | 2018 |
| Cdmk Consultants Limited | Financial services | 2017 |
| Cdmk One Ltd | Administrative & support | 2026 |
| Cdmk Properties Limited | Real estate | 2010 |
| Cedar Circle Properties Limited | Real estate | 2019 |
| Channelside Holdings Limited | Real estate | 2021 |
| Charles Dixon Property Consultants Limited | Real estate | 2016 |
| Charlotte Chaplin Ltd | Hospitality | 2020 |
| Chattaway Group Limited | Financial services | 2025 |
| Chattaway Inns Limited | Hospitality | 1996 |
| Chattaway Properties Limited | Hospitality | 2000 |
| Cheeky Blighter Publishing Ltd | Information & communication | 2013 |
| Chris Brammall Limited | Arts & recreation | 2002 |
| Chris Bugler Architects Limited | Professional & scientific | 2002 |
| Chris Hull & Sons Ltd | Construction | 2017 |
| Chris Murphy Electrical Limited | Construction | 2006 |
| Chromatechnic Limited | Manufacturing | 2005 |
| Chronolog Limited | Information & communication | 2025 |
| Chss Property Solutions Ltd | Real estate | 2023 |
| Church Walk Pre-School Nursery Limited | Education | 2005 |
| Citrus-Lime Limited | Information & communication | 1999 |
| Citrus-Lime Topco Limited | Financial services | 2025 |
| CJG Silviculture Ltd | Agriculture & fishing | 2013 |
| CJS Properties Ltd | Administrative & support | 2013 |
| Clean Bright Cleaning Limited | Administrative & support | 2024 |
| Cleimar Limited | Professional & scientific | 2010 |
| Cloud 9 Bars Limited | Hospitality | 2022 |
| Cloud POS Market Place Limited | Information & communication | 2022 |
| Coal Yeat Limited | Hospitality | 2007 |