| Crowe Growth Partners Ltd | Information & communication | 2025 |
| Crown Cleaning Group FM Ltd | Administrative & support | 2019 |
| CRS Entertainment Limited | Hospitality | 2014 |
| Cryptic Colouration Limited | Information & communication | 2001 |
| Crystal Radio Systems Limited | Information & communication | 1999 |
| CS Sales & Marketing Limited | Wholesale & retail | 2017 |
| CSK Accountant Limited | Professional & scientific | 2015 |
| CSS Worksafe Limited | Professional & scientific | 2002 |
| CSW Enterprises Limited | Administrative & support | 2015 |
| CT Business & Executive Coaching Ltd | Professional & scientific | 2023 |
| Ctech Automation Limited | Professional & scientific | 2021 |
| CTS Houses Ltd | Real estate | 2014 |
| CTS Investments (Inkberrow) Limited | Financial services | 2017 |
| CTS Sales & Marketing Limited | Wholesale & retail | 2007 |
| CUB Dubs Ltd | Information & communication | 2023 |
| Cube Networking Limited | Information & communication | 2026 |
| Cube Storage Ltd | Transport & logistics | 2026 |
| Cubes Events & Productions Ltd | Administrative & support | 2024 |
| Cubic Creations Ltd | Information & communication | 2022 |
| Cumell Consulting Limited | Manufacturing | 2016 |
| Cupid Cleaning Services Limited | Administrative & support | 2011 |
| Cupitt Jeweller Limited | Wholesale & retail | 2011 |
| Curo Professional Services Ltd | Professional & scientific | 2005 |
| Curo Trustees Limited | Professional & scientific | 2024 |
| Currywurst Ltd | Hospitality | 2019 |
| Curtain & Blind Co (Warks) Ltd | Manufacturing | 2022 |
| CUT to Size Studio Limited | Manufacturing | 2021 |
| Cutting Edge Machinery Limited | Manufacturing | 2008 |
| Cyclops Board Sports Limited | Wholesale & retail | 2009 |
| Cycomverse Solutions Ltd | Wholesale & retail | 2026 |
| Cypress House Residents Association Limited | Households | 2025 |
| Cypress House Residents RTM Company Limited | Households | 2026 |
| D & G Stone Services Limited | Manufacturing | 2012 |
| D & J Heyes Limited | Construction | 2011 |
| D & M Electrical Solutions Limited | Construction | 2013 |
| D Allum Fabrications Limited | Manufacturing | 2003 |
| D B Modelling Limited | Construction | 2004 |
| D B Racing Ltd | Arts & recreation | 2015 |
| D C Dajas Limited | Manufacturing | 2016 |
| D C Heaphys Limited | Wholesale & retail | 2011 |
| D C Roberts Building Contractors Limited | Construction | 2013 |
| D Claridge GAS Ltd | Construction | 2025 |
| D E Talbot Transport Limited | Transport & logistics | 2019 |
| D Gadd Ltd | Construction | 2026 |
| D Gupta Limited | Health & social care | 2011 |
| D J Holder (Accountants) Limited | Professional & scientific | 1996 |
| D J Johnson Accountancy Services Limited | Professional & scientific | 2002 |
| D K Pools Limited | Construction | 2020 |
| D Large Ltd | Wholesale & retail | 2019 |
| D Mercer Electrical Services Ltd | Construction | 2026 |
| D W Pointer (Environmental Services) Limited | Professional & scientific | 2013 |
| D&H Foundry Gyms Ltd | Arts & recreation | 2024 |
| D-Lec Electrical Services Limited | Construction | 2018 |
| D. Bird & SON Ltd | Administrative & support | 2011 |
| D. G. E. Entertainment Ltd | Arts & recreation | 2026 |
| D. Gilder Electrical Contractors Limited | Other services | 2009 |
| D. U. Gittins Ltd | Professional & scientific | 2009 |
| D.I.F.Y Home Improvements Ltd | Construction | 2024 |
| D.M.D Data and Electrical Services Ltd | Construction | 2005 |
| D.P. Designs Limited | Administrative & support | 2003 |
| D.S. Motor Repairs 2002 Ltd. | Wholesale & retail | 2000 |
| D.W. Pointer & Partners Limited | Other services | 1991 |
| DAB Hand Property Developments Limited | Real estate | 2020 |
| Daily Choices Ltd | Wholesale & retail | 2024 |
| Dairymaster (UK) Limited | Wholesale & retail | 1998 |
| Dale Peart Limited | Other services | 2018 |
| Dalish Ltd | Hospitality | 2021 |
| Dallem Engineering Limited | Manufacturing | 2004 |
| Dalton Digital Training Ltd | Professional & scientific | 2024 |
| Daly Highway Services Ltd | Professional & scientific | 2024 |
| Damonte Ltd | Wholesale & retail | 2022 |
| Dance With MR D Limited | Arts & recreation | 2002 |
| Dancing Pointe Limited | Education | 2014 |
| Dane Manor Publishing Ltd | Wholesale & retail | 2021 |
| Daniel Arthur Rentals Ltd | Real estate | 2026 |
| Daniel Grant Social Care Ltd | Health & social care | 2023 |
| Daniel Raine Limited | Administrative & support | 2011 |
| Danton Franchising Limited | Administrative & support | 2025 |
| Danton Holdings Limited | Education | 2020 |
| Danton HR Limited | Professional & scientific | 2015 |
| Darkling Productions Limited | Arts & recreation | 2020 |
| Darkpure Ltd | Professional & scientific | 2023 |
| Darlow and Webster Limited | Construction | 2003 |
| Daryl Mccormack Ltd | Arts & recreation | 2022 |
| Datatrace Consumer Services (UK) Limited | Information & communication | 2018 |
| Dave Griffiths Pipe Fitting Ltd | Construction | 2012 |
| Davenport Fallen Stock Ltd | Administrative & support | 2008 |
| Davey Construction Installations Ltd | Construction | 2013 |
| Davey Lighting Limited | Manufacturing | 2008 |
| David & Company (Birmingham) Limited | Professional & scientific | 2023 |
| David Blackmore Hairdressing Ltd | Other services | 2018 |
| David Bradley Decorations Limited | Construction | 2024 |
| David Withers Limited | Wholesale & retail | 2020 |
| Davis Property Solutions Limited | Construction | 2017 |
| Davjon Limited | Construction | 2019 |
| Dawson & Emmerson Limited | Wholesale & retail | 1919 |
| Day for Nite Ltd | Information & communication | 2016 |
| Daytona Homes Ltd | Construction | 2023 |
| DCC Supplies Limited | Wholesale & retail | 2006 |
| Dcsm Limited | Wholesale & retail | 2023 |