| Castle Carpet Centre Ltd | Wholesale & retail | 2019 |
| Castle Community Companion Services Ltd | Transport & logistics | 2025 |
| Castle Property Services Holdings Limited | Financial services | 2016 |
| CB Campaigns Ltd | Other services | 2021 |
| Celestine Developments Ltd | Administrative & support | 2023 |
| Centrifuge Ltd | Information & communication | 2016 |
| Cesur Packaging UK Limited | Administrative & support | 2005 |
| Ceylon Co UK (PVT) Limited | Wholesale & retail | 2022 |
| CF Local Ltd | Real estate | 2005 |
| CH Services Group Limited | Professional & scientific | 2019 |
| Charterhouse Accountancy Limited | Professional & scientific | 2021 |
| Charterhouse Accountancy Services Limited | Professional & scientific | 2020 |
| Charterhouse Business Services Limited | Professional & scientific | 2016 |
| Charterhouse Financial Limited | Financial services | 2020 |
| Charterhouse Partners Limited | Professional & scientific | 2020 |
| Charterhouse Tax Limited | Professional & scientific | 2017 |
| Chelsea Wild Flowers Limited | Wholesale & retail | 2016 |
| Chemiclean Products Limited | Manufacturing | 2005 |
| Cherry Hill Waste Limited | Water & waste | 1998 |
| Cheshire Sheds and Garden Buildings Ltd | Wholesale & retail | 2017 |
| Chiltern Timber Limited | Wholesale & retail | 2026 |
| Christopher Charles Collections Ltd | Wholesale & retail | 2020 |
| CJM Road Management Limited | Other services | 2010 |
| Clad Property Limited | Real estate | 1994 |
| Classic Memories Ltd | Arts & recreation | 2025 |
| Classy Styles Limited | Other services | 2008 |
| Clayton Road Ltd | Wholesale & retail | 2024 |
| Cleaning & Hygiene Distributors Limited | Wholesale & retail | 1996 |
| Cleanshaw Ltd | Administrative & support | 2024 |
| Clearskies Mark Limited | Administrative & support | 2019 |
| Clubshine Limited Partnership | | 2021 |
| CMH Holdings Ltd | Financial services | 2025 |
| Collaborative Structures and Interiors (CSI UK) Ltd | Construction | 2021 |
| Commercial Networks Limited | Other services | 2011 |
| Community Ventures Development Services CIC | Other services | 2015 |
| Compact Science Systems Limited | Manufacturing | 2005 |
| Compass Contracts Property Management Limited | Real estate | 2007 |
| Comptech Services Ltd | Professional & scientific | 2015 |
| Concept Bespoke Joinery Limited | Construction | 2018 |
| Concept Ff&E Limited | Construction | 2014 |
| Concrete Promo Limited | Other services | 2011 |
| CONNECTED247 Ltd | Administrative & support | 2013 |
| Constant Robin Limited | Real estate | 2019 |
| Container Coffee Co Limited | Hospitality | 2018 |
| Cosmeticsuk Ltd | Wholesale & retail | 2019 |
| Cosmic Turtle Limited | Professional & scientific | 2016 |
| Countrywide Landscapes and Garden Design Limited | Administrative & support | 2007 |
| Court Help Limited | Professional & scientific | 2019 |
| Courtyard Apartments Management UK Limited | Real estate | 2007 |
| CR2 Consultants Limited | Administrative & support | 2017 |
| Crownwell School Limited | Education | 2025 |
| Croxton Developments Ltd | Construction | 2024 |
| Ctkn Property Limited | Real estate | 2022 |
| Cubic Architectural Services Ltd | Professional & scientific | 2011 |
| Cvad Solutions (Holdings) Ltd | Extraterritorial | 2021 |
| CWD Sandbach Ltd | Wholesale & retail | 2022 |
| Cxix Limited | Wholesale & retail | 2017 |
| Cyberflair Limited | Information & communication | 2010 |
| D & S Electrical Distributors Limited | Wholesale & retail | 2012 |
| D a D Munro Engineers and Contractors Limited | Manufacturing | 1958 |
| D Billings Ltd | Hospitality | 2016 |
| D Price & Sons Ltd | Other services | 2020 |
| D S Bennett (Midlands) Limited | Real estate | 2016 |
| D Y Vickers Consulting Limited | Professional & scientific | 2018 |
| D&B Events Ltd | Wholesale & retail | 2025 |
| DAB Games Ltd | Manufacturing | 2025 |
| DALER81 Limited | Wholesale & retail | 2025 |
| Dancing Octopus Fish & Chips Private Limited | Hospitality | 2006 |
| Dasanayake Limited | Wholesale & retail | 2018 |
| Datarebels Ltd | Information & communication | 2021 |
| Davies Bespoke Designs Limited | Construction | 2012 |
| DB Joinery & Building Ltd | Construction | 2022 |
| DD Properties (Formby) Limited | Real estate | 2024 |
| Deas Studio Limited | Wholesale & retail | 2022 |
| Delicata Coachbuilders Limited | Administrative & support | 2001 |
| Delicata Property Holdings Limited | Financial services | 2020 |
| Derrick Cantrell Holdings Limited | Financial services | 2021 |
| Design Insight Limited | Professional & scientific | 2003 |
| Design Works Holdings Ltd | Wholesale & retail | 2021 |
| Detail Wraps Ltd | Other services | 2023 |
| Dexter Rowan Ltd | Real estate | 2021 |
| Dissension Ltd | Professional & scientific | 2025 |
| District Heating Services Limited | Construction | 2017 |
| DJH Building Services Ltd | Construction | 2023 |
| DML Transport & Courier Limited | Transport & logistics | 2018 |
| DO Midlands Limited | Professional & scientific | 2019 |
| Dock and Door Services Limited | Manufacturing | 2016 |
| Doorset Solutions Limited | Professional & scientific | 2021 |
| Dora Consultancy Limited | Professional & scientific | 2025 |
| Doulton Water Filters Asia Holdings Limited | Financial services | 2019 |
| Doulton Water Filters Limited | Wholesale & retail | 2016 |
| Doulton Water Filters South Asia Holdings Limited | Financial services | 2020 |
| Doulton Water Holdings Limited | Financial services | 2020 |
| DOW Holdings Ltd | Real estate | 2019 |
| Drayton Beaumont Group Limited | Financial services | 2021 |
| Dress (Cheshire) Limited | Wholesale & retail | 2015 |
| Dtcl Holdings Limited | Financial services | 2022 |
| Dundas Law Limited | Professional & scientific | 2020 |
| DW Promotions Ltd | Administrative & support | 2023 |
| Dwell Well - Long Time Ltd | Real estate | 2026 |