| Candy Cloudz Limited | Wholesale & retail | 2026 |
| Candy Emporium Ltd | Wholesale & retail | 2023 |
| Canine Handbooks Limited | Arts & recreation | 2021 |
| Canmahn Bmallaa Limited | Information & communication | 2025 |
| Canna-Kingdom Ltd | Wholesale & retail | 2025 |
| Cannon ST. (H.C.C.) Limited | Wholesale & retail | 1982 |
| Canopy Tree Care Ltd | Water & waste | 2026 |
| Canteen Community Enterprise Ltd | Education | 2020 |
| Canterbury Halls Management Company Ltd | Administrative & support | 2017 |
| Cantona Pubs and Bars Ltd | Hospitality | 2025 |
| CAP Transport Limited | Transport & logistics | 2018 |
| Capewell Construction & Developments Limited | Construction | 2014 |
| Capewell Construction Limited | Construction | 2024 |
| Caphouse Education Ltd. | Education | 2017 |
| Capital Crest Properties Limited | Real estate | 2023 |
| Capital Reward Limited | Financial services | 2006 |
| Capo Fashion NW Ltd | Wholesale & retail | 2025 |
| Capol (U.K.) Limited | Wholesale & retail | 1993 |
| Capri Aesthetics Ltd | Health & social care | 2025 |
| Captura Surveying & Inspection Limited | Professional & scientific | 2015 |
| Car Care Warehouse Limited | Wholesale & retail | 2021 |
| Car Commercial Camper Limited | Wholesale & retail | 2026 |
| Car Crazze Ltd | Wholesale & retail | 2024 |
| Car Detailing Huddersfield Limited | Wholesale & retail | 2022 |
| Car Genie West Yorkshire Ltd | Wholesale & retail | 2024 |
| Car Park Sparkle Ltd | Wholesale & retail | 2025 |
| Car Repairs (Halifax) Ltd | Wholesale & retail | 2025 |
| Car Sparkle Limited | Wholesale & retail | 2016 |
| Car Switch Limited | Wholesale & retail | 2018 |
| CAR-FIXERS123 Limited | Wholesale & retail | 2025 |
| Carbon Investment Ltd | Construction | 2012 |
| Carbon Marketing Agency Ltd | Professional & scientific | 2025 |
| Carbon Save Ltd | Construction | 2020 |
| Carby Shelly Elizabeth 0955 Limited | Health & social care | 2014 |
| Card Connexion Ltd | Wholesale & retail | 2022 |
| Cardamon Green (HD5) Ltd | Hospitality | 2019 |
| Cardown Assist Ltd | Information & communication | 2026 |
| Cardyan Limited | Information & communication | 2022 |
| Care AK Ltd | Health & social care | 2015 |
| Care and Accommodation Limited | Hospitality | 2026 |
| Care Compas Ltd | Health & social care | 2025 |
| Care Counts Limited | Health & social care | 2005 |
| Care for Eyes Limited | Health & social care | 2022 |
| Care Fundraising Supplies Ltd | Extraterritorial | 2017 |
| Care HD Limited | Health & social care | 2025 |
| Care Home Economics Limited | Professional & scientific | 1992 |
| Care Management Solutions Limited | Health & social care | 2005 |
| Careclean & Reset Ltd | Administrative & support | 2025 |
| Careed Recruitment Limited | Administrative & support | 2022 |
| Careful Leasing Limited | Financial services | 2016 |
| Carelearn Ltd | Education | 2025 |
| Careone Team Limited | Health & social care | 2012 |
| Carers Trust MID Yorkshire | Health & social care | 1997 |
| Carespark Solutions Limited | Administrative & support | 2025 |
| Carfax International Limited | Information & communication | 2009 |
| Caribbean Cabin Ltd | Hospitality | 2025 |
| Carina Healthcare Ltd | Health & social care | 2020 |
| Caring for YOU (Yorkshire) Limited | Health & social care | 2013 |
| Caring Hands Childrens Services Ltd | Health & social care | 2025 |
| Caring Hands Staff & Recruitment Ltd | Administrative & support | 2025 |
| Carlton Alarms Holdings Limited | Financial services | 2024 |
| Carlton Alarms Limited | Construction | 2005 |
| Carlton Commercial Cleaning Services Ltd | Administrative & support | 2023 |
| Carlton Metals Limited | Wholesale & retail | 2022 |
| Carman Property Letting Ltd | Real estate | 2025 |
| Carmenola Ltd | Real estate | 2023 |
| Carmichael Wholesale Global Limited | Manufacturing | 2022 |
| Carmichael Wholesale Limited | Wholesale & retail | 2018 |
| Carmichaelwholesale Trading Ltd | Hospitality | 2024 |
| Carne Steakhouse Limited | Hospitality | 2025 |
| Caroline Black Consultancy Ltd | Professional & scientific | 2020 |
| Carpet Care Ltd | Administrative & support | 2021 |
| Carpets & Flooring (Skelmanthorpe) Limited | Wholesale & retail | 2024 |
| Carr & Co Solicitors (Yorkshire) Limited | Professional & scientific | 2010 |
| Carr Lane Management Limited | Real estate | 2005 |
| Carr Roofing Ltd | Construction | 2017 |
| Carr-Hill Limited | Professional & scientific | 2008 |
| Carramore International Limited | Wholesale & retail | 1991 |
| Carrera Developments Ltd | Construction | 2023 |
| Cars Direct International Limited | Wholesale & retail | 2023 |
| Cartify Group UK Ltd | Wholesale & retail | 2026 |
| Cartwright Gardens Management Company Limited | Households | 1992 |
| Carvolution Limited | Wholesale & retail | 2008 |
| Casa Amigos Ltd | Hospitality | 2000 |
| Casa Muirlands Holdings Ltd | Real estate | 2024 |
| Casabeth Properties Limited | Real estate | 2007 |
| Cascade Entertainment Ltd | Professional & scientific | 2021 |
| Casciano Foods Ltd | Hospitality | 2025 |
| Casciano Italian Grill Limited | Hospitality | 2021 |
| Case Assist Legal Consultancy Limited | Professional & scientific | 2026 |
| Casey Jones - Realway Food Limited | Hospitality | 2025 |
| Cask Zero Properties Limited | Real estate | 2016 |
| Caspian Desi Spice Limited | Wholesale & retail | 2025 |
| Casseys Property Ltd | Extraterritorial | 2025 |
| Castings by Carmine Ltd | Health & social care | 2025 |
| Castle Bite One Ltd | Transport & logistics | 2022 |
| Castle Hill Cars Ltd | Wholesale & retail | 2019 |
| Castle Hill Hotel Heritage Limited | Hospitality | 2022 |
| Castle Hill Visitor Centre CIC | Health & social care | 2025 |
| Castle House Properties Ltd | Real estate | 2014 |