| Clipovo Ltd | Wholesale & retail | 2025 |
| CLM Construction Supplies Limited | Wholesale & retail | 2010 |
| Clothinglpj Limited | Wholesale & retail | 2026 |
| Cloudscent Consulting Limited | Information & communication | 2025 |
| CLX Wholesale Limited | Wholesale & retail | 2016 |
| CM Connections Ltd | Construction | 2023 |
| CMJ Pressure Washing Limited | Administrative & support | 2024 |
| Coconut Holdings Limited | Construction | 2021 |
| Colosseum Investments Ltd | Real estate | 2024 |
| Colourlinx Limited | Wholesale & retail | 2021 |
| Commercial Keyholding Company Ltd | Administrative & support | 2026 |
| Compass Multi Culture Ltd | Wholesale & retail | 2013 |
| Computors Limited | Wholesale & retail | 2001 |
| Concept Interior Designs Ltd | Professional & scientific | 2023 |
| Conhall Limited | Professional & scientific | 1999 |
| Connect Complex Care Ltd | Public administration | 2023 |
| Continental Food House Ltd | Hospitality | 2024 |
| Contract Beads Limited | Wholesale & retail | 2004 |
| Contract Coatings Limited | Professional & scientific | 2002 |
| Cooper Haynes Limited | Construction | 2022 |
| COS Subs Ltd | Administrative & support | 2014 |
| Coseley Auto Centre Ltd | Wholesale & retail | 2019 |
| Coseley Hand Car Wash Ltd | Administrative & support | 2025 |
| Coseley Mini Market Limited | Wholesale & retail | 2008 |
| Coseley Resources Ltd | Water & waste | 2025 |
| Coseley Steel Services Limited | Professional & scientific | 1975 |
| Cotterside Limited | Wholesale & retail | 2014 |
| Countdown Food and Wine Ltd | Wholesale & retail | 2021 |
| Countryside Coatings Ltd | Construction | 2020 |
| Countrywide Industrial Cleaning Services Ltd | Administrative & support | 2007 |
| County Groundforce Limited | Administrative & support | 2013 |
| Cox's Cafe Ltd | Hospitality | 2026 |
| CPC Training Solutions Ltd | Professional & scientific | 2016 |
| CPS Industries Limited | Other services | 1968 |
| Craftedfx Ltd. | Administrative & support | 2016 |
| Craftprint Mastery Ltd | Wholesale & retail | 2023 |
| Craig Gracey Ltd | Financial services | 2002 |
| Craig's Window Cleaning Limited | Administrative & support | 2024 |
| Crane Hire Midlands Limited | Construction | 2008 |
| Credeo Limited | Real estate | 2022 |
| Crib Curators Ltd | Households | 2026 |
| Cris&Andu Transport Ltd | Transport & logistics | 2025 |
| Crownstone Homes Developments Ltd | Construction | 2026 |
| Crscorp Ltd | Administrative & support | 2021 |
| CRW Sports Ltd | Wholesale & retail | 2025 |
| Crystal Cleanze Group Ltd | Wholesale & retail | 2023 |
| CU Sustainability Partnership LLP | | 2020 |
| Cuci Logistics Limited | Transport & logistics | 2019 |
| Curtain Expert Limited | Manufacturing | 2008 |
| Curtis Sloane Limited | Real estate | 2014 |
| Custom Designz Limited | Other services | 2010 |
| Custom Finish Limited | Manufacturing | 2023 |
| CUT Above Carpentry Limited | Manufacturing | 2023 |
| CVH Group Ltd | Wholesale & retail | 2025 |
| Cycxi Limited | Manufacturing | 2012 |
| Cygnet Hair & Beauty Studio Limited | Other services | 2004 |
| Cyprian DCO Ltd | Health & social care | 2024 |
| Czechutrans Ltd | Transport & logistics | 2014 |
| D & E Commercials Limited | Manufacturing | 2025 |
| D and N Taylor Ltd | Transport & logistics | 2023 |
| D E O'Reilly Industries Limited | Real estate | 2014 |
| D E O'Reilly Waste Management Limited | Real estate | 2019 |
| D K Locums Ltd | Other services | 2022 |
| D Mercantile Ltd | Wholesale & retail | 2023 |
| D P France Consultancy Limited | Administrative & support | 2008 |
| D&J Round Holdings Ltd | Financial services | 2026 |
| D&J Round Properties Ltd | Real estate | 2026 |
| D&S Midland Properties Ltd | Real estate | 2025 |
| D'S Properties Legacy Ltd | Real estate | 2024 |
| D. W. Windows Limited | Construction | 2006 |
| D1 Assets Ltd | Arts & recreation | 2025 |
| Daelus Automation Systems Limited | Manufacturing | 2020 |
| Dakams Limited | Health & social care | 2019 |
| DAM Buy to LET Investors Ltd | Real estate | 2024 |
| Daniel Prime Ltd | Wholesale & retail | 2021 |
| Dannatoby Ltd | Health & social care | 2026 |
| Dans Tax Ltd | Professional & scientific | 2023 |
| Danv Delivery Ltd | Transport & logistics | 2022 |
| Danvic Driving Limited | Transport & logistics | 2014 |
| Darcy Lane Ltd | Real estate | 2026 |
| Darfil (UK) Limited | Wholesale & retail | 2000 |
| Darian Transport Ltd | Transport & logistics | 2023 |
| Daryan M Limited | Wholesale & retail | 2021 |
| Dashmesh Logistics Ltd | Transport & logistics | 2025 |
| Dataflair Integrated Business Systems Limited | Information & communication | 2016 |
| Davelmarr Transport Ltd | Transport & logistics | 2017 |
| David Dunn Limited | Other services | 2005 |
| Davies Green Energy Limited | Construction | 2025 |
| Dawny Products Limited | Manufacturing | 2014 |
| DBH Mechanical Services Limited | Construction | 2014 |
| DBS Financial Associates Ltd | Financial services | 2018 |
| DBZ Khan Ltd | Wholesale & retail | 2015 |
| Dbzbeds Ltd | Manufacturing | 2023 |
| DC Hand Carwash Ltd | Administrative & support | 2023 |
| DC SON Properties Ltd | Real estate | 2024 |
| DEA Beauty Ltd | Other services | 2024 |
| Dea-Surveyor Solutions Ltd | Professional & scientific | 2025 |
| Deals Properties Ltd | Real estate | 2024 |
| Deanlake Ltd | Other services | 2024 |
| Debra Consultancy Limited | Professional & scientific | 2025 |