| CR Children's Care Ltd | Health & social care | 2024 |
| CR Morris Limited | Financial services | 2013 |
| Cr&Dr Developments Ltd | Real estate | 2024 |
| Crabb Kipling Ltd | Construction | 2012 |
| Crafty Sages Studios Ltd | Arts & recreation | 2021 |
| Craig Stone Automotive Limited | Professional & scientific | 2023 |
| Craighaven Limited | Health & social care | 2004 |
| Cranium Ventures Limited | Information & communication | 2018 |
| Crazie Mobile Limited | Information & communication | 2016 |
| Create Element Ltd | Information & communication | 2022 |
| Creating Connections Limited | Administrative & support | 2025 |
| Creative Cars & Couriers Limited | Professional & scientific | 1985 |
| Creative Equals Group Ltd | Professional & scientific | 2024 |
| Creative Synergies Consulting Limited | Administrative & support | 2011 |
| Creative Workshop Coaches CIC | Administrative & support | 2025 |
| Cresswell Consulting Limited | Professional & scientific | 2019 |
| Crewe Farm Contracting Limited | Administrative & support | 2021 |
| Crimscote Local Ltd | Wholesale & retail | 2019 |
| Crindau Gateway Limited | Construction | 2005 |
| Critical Path Marketing Ltd | Professional & scientific | 2024 |
| Crombies at the Farm Ltd | Wholesale & retail | 2019 |
| Crossfit Leamington Ltd | Arts & recreation | 2016 |
| Crossley & Crossley Ltd | Wholesale & retail | 2016 |
| Crown Builders Warwickshire Limited | Construction | 2021 |
| Cruz Consulting Limited | Administrative & support | 2011 |
| Crystal Contracting Limited | Professional & scientific | 2013 |
| Crystal School of Motoring Limited | Other services | 2009 |
| Crystalzoomuk Limited | Professional & scientific | 2025 |
| CS Chinese Limited | Hospitality | 2019 |
| CSE Air Conditioning Limited | Energy | 2022 |
| CT Real Estate Investments Limited | Real estate | 2024 |
| CTM International Limited | Wholesale & retail | 1997 |
| Ctrm Cubed Limited | Information & communication | 2017 |
| CTS Forestry and Arboriculture Limited | Agriculture & fishing | 2013 |
| Cube Mobility Engineering Ltd | Professional & scientific | 2026 |
| Cuddly CUB Ltd | Wholesale & retail | 2025 |
| Cultured Violence Ltd. | Manufacturing | 2024 |
| Cure Media Ltd | Information & communication | 2021 |
| Curity UK Limited | Information & communication | 2025 |
| Cusense by Curium Limited | Information & communication | 2026 |
| Custom Caddy Vans Ltd | Wholesale & retail | 2019 |
| Cutting IT Barber Shop Limited | Other services | 2004 |
| CV Property Developments Ltd | Construction | 2026 |
| CW Racing Ltd | Information & communication | 2023 |
| Cwdg Ltd | Financial services | 2021 |
| CXS IT Consulting Ltd | Information & communication | 2024 |
| Cyan Contemporary Arts Ltd | Financial services | 2020 |
| Cyberlogics Cost Management Limited | Information & communication | 2024 |
| Cyborg - Robotics Ltd | Other services | 2020 |
| Czech & Slovak Club England C.I.C. | Education | 2013 |
| D & G Developers Ltd | Construction | 2023 |
| D & P Holt (Land) Limited | Real estate | 2017 |
| D J & P J Ellis Limited | Administrative & support | 2013 |
| D W Estates & Leisure Limited | Hospitality | 2015 |
| D&G Expedition Ltd | Wholesale & retail | 2022 |
| D-Low Limited | Wholesale & retail | 2025 |
| D2 Development Group Limited | Financial services | 2024 |
| D2C Software Ltd | Information & communication | 2026 |
| D5 Creative Ltd | Professional & scientific | 2016 |
| Dacrus Engineering Limited | Professional & scientific | 2026 |
| Daisy Chain Gift Company Limited | Wholesale & retail | 2009 |
| Daisy Maid Cleaning Services Ltd | Administrative & support | 2014 |
| Dalcon Construction Limited | Construction | 2019 |
| Dali Personnel Limited | Administrative & support | 2018 |
| Dali Properties Limited | Households | 2017 |
| Damson Property Ltd | Real estate | 2022 |
| Danechyar Investment Ltd | Real estate | 2025 |
| Daniel Maggs Limited | Education | 2015 |
| Daniell Plumbing Ltd | Construction | 2003 |
| Dannian UK Limited | Administrative & support | 2025 |
| Dany Construction Ltd | Construction | 2025 |
| Darmano Ltd | Real estate | 2023 |
| Darsons Transport Limited | Real estate | 1998 |
| Dassault Systemes UK Limited | Information & communication | 1997 |
| Data Evolution Consultants Ltd | Information & communication | 2022 |
| Data Power Limited | Construction | 2000 |
| Data Transform Ltd | Professional & scientific | 2022 |
| Datalore Limited | Professional & scientific | 2001 |
| Davab Limited | Wholesale & retail | 2020 |
| Dave Cooling and Associates Limited | Professional & scientific | 1989 |
| Dave Storer Ltd | Professional & scientific | 2012 |
| Dave W Pickles Limited | Professional & scientific | 2020 |
| Dave Walker Limited | Construction | 2001 |
| David Robotham Limited | Professional & scientific | 1995 |
| Davidson Pert Financial Associates Limited | Professional & scientific | 2003 |
| Day DOT Studio Ltd | Professional & scientific | 2025 |
| DB Design Services Limited | Professional & scientific | 2026 |
| DBM Bespoke Facades Limited | Construction | 2022 |
| DBR Aviation Ltd | Manufacturing | 2024 |
| Dbsb Limited | Hospitality | 2024 |
| DBV Properties Ltd | Real estate | 2025 |
| DC Legal and Compliance Limited | Other services | 2026 |
| DCF (Warwickshire) Limited | Construction | 2023 |
| DCH Aviation Engineering Limited | Professional & scientific | 2018 |
| DD365 Consultancy Limited | Information & communication | 2025 |
| DDP Management Limited | Financial services | 2014 |
| Debbie Shore Sewing Limited | Wholesale & retail | 2020 |
| Debut Tanning Warwick Limited | Other services | 2016 |
| Decerno Limited | Professional & scientific | 2022 |
| Decision Vantage Limited | Professional & scientific | 2022 |