| C M Jagger Builders Limited | Construction | 2004 |
| C MAX Peer Ltd | Information & communication | 2026 |
| C Milnes Joinery Limited | Construction | 2017 |
| C N Blackwell Limited | Information & communication | 2017 |
| C N Tax & Consultancy Limited | Professional & scientific | 2019 |
| C Oglesby Joinery Ltd | Construction | 2016 |
| C P Holland & Sons Limited | Manufacturing | 2002 |
| C P Plastics (Yorkshire) Ltd | Construction | 2025 |
| C R Plastering Services Limited | Construction | 2012 |
| C T Carling Limited | Construction | 2003 |
| C T Flooring (Barnsley) Ltd | Construction | 2008 |
| C&D Electrical Ltd | Construction | 2018 |
| C&J Healthcare Ltd | Health & social care | 2019 |
| C&K Construction Services Ltd | Construction | 2017 |
| C&N Johnstone Holdings Ltd | Financial services | 2024 |
| C&R Transport Ltd | Transport & logistics | 2025 |
| C&Tak Ventures Limited | Information & communication | 2010 |
| C-A Motor Group Ltd | Wholesale & retail | 2024 |
| C. Bancroft Properties Limited | Real estate | 1997 |
| C. J. Gaines Limited | Professional & scientific | 2017 |
| C.E.R Projects Ltd | Professional & scientific | 2023 |
| C.Greenwood Excavations Ltd | Construction | 2024 |
| C.J. Tafft (Northern) Limited | Administrative & support | 2000 |
| C.J. Tafft Limited | Administrative & support | 1991 |
| C20 Comms Ltd | Professional & scientific | 2024 |
| C2CC Limited | Professional & scientific | 2023 |
| CAC24 Limited | Hospitality | 2024 |
| Cactus Joe's Ltd | Hospitality | 2009 |
| Caesars Pizzas Ltd | Hospitality | 2024 |
| Cafe 17 Limited | Hospitality | 2025 |
| Cafe Bar EL Born Limited | Hospitality | 2023 |
| Cafe DI Lusso Halifax Ltd | Hospitality | 2026 |
| Cafe DI' Lusso Ltd | Hospitality | 2024 |
| Cafe Italia (West Vale) Limited | Hospitality | 2020 |
| Cafe Thai Limited | Hospitality | 2014 |
| CAI Technology UK Ltd | Administrative & support | 2023 |
| Cairn of Claise Limited | Transport & logistics | 2019 |
| Caishen Investments Ltd | Professional & scientific | 2016 |
| Caishen Property Ltd | Real estate | 2017 |
| Cajack Services Limited | Transport & logistics | 2019 |
| Cakcs Ltd | Transport & logistics | 2017 |
| Cakvs Ltd | Transport & logistics | 2013 |
| CAL Jewellery Limited | Manufacturing | 2024 |
| Caldan Industrial Insulation Limited | Construction | 2002 |
| Caldbeck Ridings Ltd | Wholesale & retail | 2024 |
| Calder Appliance Care Ltd | Other services | 2018 |
| Calder Brook Estates Limited | Real estate | 1987 |
| Calder Cleaning Support Ltd | Administrative & support | 2018 |
| Calder Home Properties Ltd | Real estate | 2021 |
| Calder IT Ltd | Administrative & support | 2017 |
| Calder Plastering Ltd | Construction | 2026 |
| Calder Precision Ltd | Manufacturing | 2025 |
| Calder Psychology Limited | Education | 2020 |
| Calder Valley Architects Limited | Construction | 2003 |
| Calder Valley Bookkeeping Limited | Professional & scientific | 2026 |
| Calder Valley Commercial Properties Limited | Real estate | 2026 |
| Calder Valley Plumbing & Heating Limited | Construction | 2011 |
| Calder Valley Productions Limited | Administrative & support | 2008 |
| Calder Valley Security Ltd | Extraterritorial | 2011 |
| Calder Valley Steiner Education Ltd. | Education | 2001 |
| Calder Valley Windows and Doors Ltd | Construction | 2021 |
| Calder Wood Retail Limited | Hospitality | 2024 |
| Caldercool Holdings Ltd | Financial services | 2020 |
| Calderdale Carers Project | Health & social care | 1996 |
| Calderdale Community Coaching Trust | Education | 2007 |
| Calderdale Construction Ltd | Construction | 2022 |
| Calderdale Decorating Services Limited | Construction | 2016 |
| Calderdale Electrical Limited | Construction | 2024 |
| Calderdale Electricians Ltd | Construction | 2018 |
| Calderdale Engineering Services Limited | Manufacturing | 1988 |
| Calderdale Health Focus Ltd | Wholesale & retail | 2009 |
| Calderdale Industrial Museum Association | Arts & recreation | 2013 |
| Calderdale Music Limited | Education | 2013 |
| Calderdale One Limited | Professional & scientific | 2016 |
| Calderdale Plumbing and Heating Ltd | Construction | 2026 |
| Calderdale Property Development Limited | Construction | 2026 |
| Calderdale Property Holdings Ltd | Administrative & support | 2021 |
| Calderdale Property Ltd | Transport & logistics | 2021 |
| Calderdale Sprinklers Ltd | Construction | 2019 |
| Calderdale Stairlifts Ltd | Wholesale & retail | 2016 |
| Calderdale Storage Limited | Extraterritorial | 2015 |
| Calderdale Wellbeing | Information & communication | 2009 |
| Calderdale Women’S Wellbeing CIC | Health & social care | 2025 |
| Calderforth Ltd | Real estate | 2021 |
| Caldex Holdings Limited | Manufacturing | 2007 |
| Cali Apparel UK Ltd | Wholesale & retail | 2015 |
| Calibre Automotive Ltd | Wholesale & retail | 2026 |
| Callie Properties Ltd | Real estate | 2020 |
| Calm Properties Limited | Real estate | 2015 |
| Calmx CIC | Education | 2020 |
| CAM Electric Limited | Information & communication | 2003 |
| CAM Rail Consultancy Limited | Administrative & support | 2007 |
| Camcare Health Ltd | Health & social care | 2016 |
| Cameo Construction Yorkshire Limited | Construction | 2018 |
| Cameo Ventures Ltd | Construction | 2024 |
| Cammy Construction Ltd | Construction | 2024 |
| Campervan Trade Parts Ltd | Wholesale & retail | 2023 |
| Campos Translation Limited | Professional & scientific | 2017 |
| Camtrack Limited | Extraterritorial | 2018 |
| CAN CAN Hoops Three Limited | Information & communication | 2026 |