| Bierlow Bess Limited | Energy | 2023 |
| Big Stone Clothing Limited | Wholesale & retail | 2025 |
| Big Time Construction Limited | Construction | 2018 |
| Biolope Limited | Manufacturing | 2005 |
| Biosource Baits Ltd | Wholesale & retail | 2023 |
| Birchwood Strategies and Associates Ltd | Extraterritorial | 1998 |
| Birkdale Storage Ltd | Transport & logistics | 2026 |
| Black Sheep Compliance Limited | Professional & scientific | 2016 |
| Black Vault Partners Ltd | Financial services | 2025 |
| Blacks Property Rentals Limited | Real estate | 2025 |
| Blue Room Pubs Ltd | Hospitality | 2025 |
| Blueline Roofing Ltd | Construction | 2022 |
| Boat Factory Ltd | Manufacturing | 2023 |
| Body by Jeannius Ltd | Other services | 2023 |
| Bodybootcamp & Personal Training Services Limited | Education | 2015 |
| Bond Consultancy (Yorkshire) Ltd | Administrative & support | 2025 |
| Boom Marketing Limited | Manufacturing | 2013 |
| Box My Gift Global Ltd | Wholesale & retail | 2022 |
| Bradco Properties Ltd | Construction | 2025 |
| Bravopak Packaging Solutions Limited | Extraterritorial | 2025 |
| Breakfast and Sandwich Bar at Premier Ltd | Hospitality | 2019 |
| Breakthrough Change Associates Limited | Professional & scientific | 2023 |
| Brendan Shaw Limited | Construction | 2009 |
| Brian Thornhill & SON Insurance Brokers Limited | Financial services | 2014 |
| Bridge Inn Limited | Extraterritorial | 1968 |
| Bridge View Holdings Limited | Financial services | 2016 |
| Bridge View Training Limited | Extraterritorial | 2013 |
| Bridgethorpe Limited | Professional & scientific | 2008 |
| Brief Encounter Mirfield Limited | Wholesale & retail | 2024 |
| Briggs & Mortar Limited | Real estate | 2019 |
| Broadoaks Property Limited | Real estate | 2021 |
| Brokerbricks Limited | Information & communication | 2026 |
| Brooks Elite Estates Ltd | Real estate | 2025 |
| Bunton Transport Services Ltd | Transport & logistics | 2023 |
| C & H Holdings (Bennetts) Limited | Financial services | 2018 |
| C J D (Holdings) Limited | Administrative & support | 1999 |
| C J Heating & GAS Specialists Limited | Construction | 2009 |
| C.C Heating Services Ltd | Construction | 2017 |
| Cadogan Avenue (Management Company) Limited | Households | 2001 |
| Calder Chippy and Grill Limited | Hospitality | 2025 |
| Calder Gates Limited | Manufacturing | 2019 |
| Calder Valley Cars Ltd | Wholesale & retail | 2025 |
| Califit Ltd | Hospitality | 2017 |
| Camborne Holdings Limited | Administrative & support | 1974 |
| Camborne Textile Systems Limited | Professional & scientific | 1987 |
| Camira Fabrics Limited | Manufacturing | 1988 |
| Camira Group Holdings Limited | Professional & scientific | 2015 |
| Camira Group Ltd | Administrative & support | 2005 |
| Camira Holdings Limited | Professional & scientific | 2015 |
| Camira Holdsworth Limited | Professional & scientific | 2007 |
| Camira International Limited | Professional & scientific | 1988 |
| Camira Limited | Professional & scientific | 1996 |
| Camira Transport Fabrics Limited | Manufacturing | 2007 |
| Camira Yarns Limited | Manufacturing | 1923 |
| Cannonvale Properties Limited | Real estate | 2000 |
| Capri Mirfield Ltd | Hospitality | 2024 |
| Carlisle Road Ltd | Administrative & support | 2018 |
| Carpeco Ltd | Wholesale & retail | 2022 |
| Carr Haulage Company Limited | Extraterritorial | 1920 |
| Casa 22 Limited | Real estate | 2022 |
| Castle Mount Mirfield Management Company Limited | Households | 2014 |
| Caulternich Bess Limited | Energy | 2021 |
| CBS Roofing Limited | Construction | 2023 |
| CD17 Ltd | Construction | 2021 |
| CDH1992 Limited | Financial services | 2025 |
| Cedar Building Solutions Ltd | Construction | 2018 |
| CF Livery Limited | Arts & recreation | 2013 |
| CGH Technology Ltd | Manufacturing | 2000 |
| CGL Courier Ltd | Transport & logistics | 2026 |
| Chambers Plumbing Services Limited | Construction | 2007 |
| Charles Buckley & Sons Limited | Professional & scientific | 1964 |
| Chris Alexander Limited | Wholesale & retail | 2015 |
| Chris Macklin Limited | Health & social care | 2018 |
| Chubby Pet Products Ltd | Agriculture & fishing | 2015 |
| Church Lane (Mirfield) Freehold Limited | Households | 2017 |
| CIS Testing Ltd | Information & communication | 2025 |
| Clarendon Court (Morden) Management Limited | Households | 2003 |
| Clickcar Ltd | Wholesale & retail | 2026 |
| Clifford Harrison Consulting Limited | Professional & scientific | 2011 |
| Cloud Doctor Ltd | Education | 2022 |
| Cloud Superstore Limited | Wholesale & retail | 2025 |
| Cloudxel Ltd | Professional & scientific | 2026 |
| Cloverfields (Horley) Management Company Limited | Households | 1997 |
| CNR Property Developments Ltd | Hospitality | 2024 |
| Collett Property Group Ltd | Construction | 2026 |
| Commune Investments Limited | Other services | 2020 |
| Community of the Resurrection(The) | Other services | 1930 |
| Compass Partnership Solutions Ltd | Professional & scientific | 2025 |
| Complete Fire Solutions Holdings Ltd | Public administration | 2021 |
| Complete Fire Solutions Ltd | Administrative & support | 2005 |
| Compli - ANT Services Limited | Professional & scientific | 2021 |
| Concept Properties Yorkshire Ltd | Professional & scientific | 2022 |
| Concord Hotel Ltd | Hospitality | 2019 |
| Conservatory Window & Door Outlet Limited | Construction | 2008 |
| Construct North Limited | Construction | 2021 |
| Convert a Roof Ltd | Construction | 2022 |
| Cote Wall Mews Property Co. Limited | Extraterritorial | 1996 |
| Courthouse Hospitality Ltd | Hospitality | 2025 |
| Cpr.Ft Ltd | Construction | 2016 |
| Cramp and Harding Limited | Professional & scientific | 2008 |