| Borda Limited | Education | 2025 |
| Boutique Whitening Australia Limited | Health & social care | 2018 |
| Boutique Whitening Global Holdings Ltd. | Health & social care | 2023 |
| Boutique Whitening Limited | Health & social care | 2014 |
| Boux Media Limited | Arts & recreation | 2022 |
| Boxcar Software Ltd | Information & communication | 2022 |
| Bridge & Valley Creative Ltd | Professional & scientific | 2018 |
| Bridge Rectifier Ltd | Administrative & support | 2015 |
| Bridges Business Development & Training Centre Limited | Education | 1992 |
| Broadbent Human Factors Ltd | Professional & scientific | 2023 |
| Brompton Grove Properties Limited | Real estate | 2022 |
| Brompton Grove Storage Ltd | Administrative & support | 2026 |
| Brooklyn Studio | Arts & recreation | 2014 |
| Brunswick Street Properties Limited | Real estate | 2006 |
| BSL 365 Interpreter Limited | Education | 2024 |
| BSL 365 Training Limited | Education | 2025 |
| Bulking Meals Ltd | Hospitality | 2021 |
| BUM Butter Ltd | Wholesale & retail | 2024 |
| Burnard Media Ltd | Information & communication | 2021 |
| Business Companion Limited | Professional & scientific | 2017 |
| BWF Construction Ltd | Construction | 2023 |
| C E D Developments Ltd | Construction | 2020 |
| C R Bookkeeping Limited | Professional & scientific | 2014 |
| C T Serve UK Ltd | Administrative & support | 2025 |
| C. J. Fleming Ltd | Professional & scientific | 2020 |
| C.Dawson Access Ltd | Administrative & support | 2019 |
| C.N. Trading Limited | Wholesale & retail | 2001 |
| C.N. Transport Limited | Transport & logistics | 2006 |
| Cafe On'T Front Ltd | Hospitality | 2024 |
| Calder Brook Garage Limited | Wholesale & retail | 2011 |
| Calder Cheesehouse (Halifax) Ltd | Wholesale & retail | 2025 |
| Calder Civic Trust Limited | Other services | 1976 |
| Calder Community Squash Community Interest Company | Arts & recreation | 2021 |
| Calder Computer Services Limited | Information & communication | 2003 |
| Calder Construction and Shop Fitting Limited | Construction | 2008 |
| Calder Health Training Limited | Education | 2026 |
| Calder Valley Search and Rescue Team | Health & social care | 2000 |
| CALDER817 Ltd | Real estate | 2022 |
| Calderdale Framework Limited | Education | 2018 |
| Calderdale Self Storage Limited | Real estate | 2012 |
| Calmac Limited | Construction | 2008 |
| Calrec Audio Limited | Manufacturing | 1989 |
| Calroc Eagle Holdings Limited | Professional & scientific | 2019 |
| Calroc Eagle Limited | Professional & scientific | 2004 |
| Campus Consultants Ltd | Health & social care | 2018 |
| CAN CAN Hoops Two Limited | Information & communication | 2024 |
| Cancan Hoops Ltd | Information & communication | 2022 |
| Cancan Productions Limited | Information & communication | 2008 |
| Cansquared Limited | Financial services | 2013 |
| Capable People Limited | Professional & scientific | 2003 |
| Capital Thinking Ltd | Professional & scientific | 2010 |
| Cargodale CIC | Transport & logistics | 2020 |
| Casa Nico Limited | Real estate | 2025 |
| Cassiopeia Limited | Professional & scientific | 2012 |
| Catalista Ltd | Education | 2020 |
| Causeway Associates Ltd | Professional & scientific | 2014 |
| Cavada Ltd | Information & communication | 2007 |
| Chalice Psychotherapy Services Ltd | Health & social care | 2024 |
| Chartstuff Limited | Information & communication | 1996 |
| Cheltermill Limited | Administrative & support | 1973 |
| Chicken Boiz Ltd | Hospitality | 2024 |
| CHP Property Maintenance Limited | Administrative & support | 2015 |
| Chris Booth Production Management Ltd | Arts & recreation | 2022 |
| Chrisinden Ltd | Manufacturing | 2026 |
| Circle of Change Productions Ltd | Information & communication | 2024 |
| Clay VFX Ltd | Information & communication | 2023 |
| Clean Xtreme Harrogate Ltd | Administrative & support | 2026 |
| Clear CGI Ltd | Professional & scientific | 2021 |
| Clearmap Ltd | Information & communication | 2024 |
| Clinical Educational and Neuropsychology Services Limited | Health & social care | 2011 |
| Clinihealth Ltd | Wholesale & retail | 2020 |
| CLK Tree Services Limited | Agriculture & fishing | 2025 |
| CN Forestry & ARB Ltd | Agriculture & fishing | 2020 |
| CN Property LLP | | 2008 |
| CNC Servicing & Systems Limited | Other services | 2005 |
| Co-Op Culture | Administrative & support | 2015 |
| Cockahoop Productions Limited | Information & communication | 2006 |
| Coffee Cali Limited | Hospitality | 2011 |
| Coiners Wharf Management Company Limited | Households | 1990 |
| Colden Water Power Company Limited | Energy | 2014 |
| Colour (Yorkshire) Ltd | Manufacturing | 2004 |
| Companion Books Ltd | Administrative & support | 2022 |
| Compassionate Leaders Global Ltd | Professional & scientific | 2025 |
| Complete Car Care Bradford Ltd | Wholesale & retail | 2021 |
| Compulink Solutions Limited | Information & communication | 2000 |
| Concoo Holding Limited | Financial services | 2022 |
| Connaught Carpets Limited | Wholesale & retail | 2002 |
| Connectedesign Ltd | Professional & scientific | 2016 |
| Controlsplus Solutions Ltd | Professional & scientific | 2010 |
| Country Store (Halifax) Ltd | Hospitality | 2023 |
| Cozy Cottage Mytholmroyd Ltd | Hospitality | 2025 |
| Craft and Canvas Ltd | Wholesale & retail | 2023 |
| Crafty Ponies Limited | Wholesale & retail | 2010 |
| Cragg Old School Management Company Ltd | Real estate | 2022 |
| Cragg Properties Ltd | Hospitality | 2008 |
| Cragg Vale Community Limited | Other services | 2008 |
| Craggle Ltd | Information & communication | 2022 |
| Craggs Energy Limited | Wholesale & retail | 2011 |
| Craggs Engineering Ltd | Professional & scientific | 2023 |
| Craggs Holdings Limited | Financial services | 2020 |