| Cowley Railway Contractors Limited | Construction | 2003 |
| Coxbridge Limited | Real estate | 1997 |
| CP Roofing Contractors Ltd | Construction | 2025 |
| CPR Commercials Trucks & Trailers Limited | Wholesale & retail | 2018 |
| CPS HGV Solutions Ltd | Wholesale & retail | 2025 |
| CQB Arena Limited | Arts & recreation | 2024 |
| CR Detailing Limited | Wholesale & retail | 2024 |
| CR Garden Maintenance Limited | Administrative & support | 2023 |
| Crafted Workwear Ltd | Wholesale & retail | 2026 |
| Crags Media Ltd | Information & communication | 2019 |
| Craig Spink Coaching School Limited | Education | 2014 |
| Craig Turner Estate Agents Limited | Administrative & support | 2018 |
| Craig White Freight Services Ltd | Transport & logistics | 2020 |
| Craig Wilson Construction Limited | Construction | 2025 |
| Crawford & Kaye Limited | Extraterritorial | 1974 |
| Creative Energy Studio Ltd | Wholesale & retail | 2022 |
| Cregan Concepts Limited | Manufacturing | 2015 |
| Cregan Designs Limited | Administrative & support | 2017 |
| Cregan Holdings Limited | Financial services | 2020 |
| Creswell Dental Surgery Ltd | Health & social care | 2016 |
| Creswell Fish Bar Ltd | Wholesale & retail | 2023 |
| Creswell Holme Management Ltd | Households | 2005 |
| Creswell Trading Company Limited | Arts & recreation | 1990 |
| Critical Resource Group Ltd | Administrative & support | 2025 |
| Crius Technologies Limited | Information & communication | 2008 |
| Crowley Rope Access Solutions Ltd | Construction | 2025 |
| Crunch Foods UK Limited | Wholesale & retail | 2022 |
| CS Legal Assistance Ltd | Other services | 2026 |
| CT Builders Crags Limited | Construction | 2023 |
| CTG Sales Ltd | Wholesale & retail | 2024 |
| Cuceu Limited | Transport & logistics | 2026 |
| CUE Craft Limited | Administrative & support | 1997 |
| Cumming ODP Services Ltd | Public administration | 2022 |
| Curious Minds Day Nursery Ltd | Education | 2025 |
| Curvastone Limited | Other services | 2019 |
| Curved Banana Ltd | Manufacturing | 2017 |
| Custom Gym Equipment Limited | Manufacturing | 2015 |
| CW Waste Services Limited | Real estate | 2017 |
| Cyobug International Limited | Wholesale & retail | 2020 |
| D & R Lets Limited | Real estate | 2022 |
| D and M Worksop Ltd | Hospitality | 2019 |
| D E Motors Ltd | Wholesale & retail | 2021 |
| D G Decorators (Barnsley) Ltd | Construction | 2003 |
| D P Real Estate Ltd | Real estate | 2023 |
| D Trigg Mechanical Fitter Ltd | Manufacturing | 2024 |
| D&A Outdoor Events Limited | Hospitality | 2025 |
| D. Learad Ltd | Manufacturing | 2018 |
| D.G. Jackson Industrial Supplies Limited | Wholesale & retail | 1982 |
| D.Hagerty Plastering Services Ltd Ltd | Construction | 2025 |
| Dafex Service Ltd | Wholesale & retail | 2019 |
| DAI Family Ltd | Hospitality | 2012 |
| Dalton Designs UK Ltd | Manufacturing | 2017 |
| Damode Software Limited | Information & communication | 2015 |
| DAN Johnson Properties Ltd | Real estate | 2025 |
| Dan&Davidson Ltd | Transport & logistics | 2025 |
| Daniel Kelly Ltd | Extraterritorial | 2025 |
| Daniel Marks Ltd. | Real estate | 1998 |
| Danlec Electrical Solutions Limited | Construction | 2015 |
| Danlec EV Chargers Ltd | Construction | 2021 |
| Danlec Property Investments Limited | Real estate | 2020 |
| Danube Financial Solutions LLP | | 2024 |
| DAO Tran Enterprise Ltd | Real estate | 2025 |
| Darboe Healthcare Consulting Ltd | Professional & scientific | 2026 |
| Darfoulds Greenhouse Cafe Limited | Hospitality | 2025 |
| Darfoulds Nursery Limited | Manufacturing | 2000 |
| Dariusz Ltd | Transport & logistics | 2015 |
| Darren Law Mortgages Ltd | Financial services | 2018 |
| David and Sharon Spencer Properties Ltd | Administrative & support | 2017 |
| David Beard Sign Associates Limited | Manufacturing | 1979 |
| David Godley Plumbing & Heating Limited | Construction | 2026 |
| David Hargreaves Driver Hire Ltd | Transport & logistics | 2025 |
| David Parker Apartments Ltd | Real estate | 2018 |
| David Parker Residential Limited | Other services | 2017 |
| David Sheard Limited | Construction | 2007 |
| David Spencer Haulage Ltd | Transport & logistics | 2014 |
| Davies Todd Opticians (Worksop) Limited | Health & social care | 1998 |
| Davut Pizza Limited | Hospitality | 2023 |
| DB Support Limited | Construction | 2026 |
| Dblt Enterprise Limited | Wholesale & retail | 2026 |
| DCH Herbal Ltd | Wholesale & retail | 2023 |
| DCL Heating Services Ltd | Construction | 2026 |
| DDC Acquisitions Limited | Professional & scientific | 2016 |
| DDC Group Ltd | Extraterritorial | 2025 |
| DDC Outsourcing Solutions Limited | Information & communication | 1987 |
| Ddss Installations Limited | Construction | 2026 |
| DE Brito Trust | Professional & scientific | 2008 |
| De-Jure Linguistics Ltd | Professional & scientific | 2010 |
| Deal Rocket Ltd | Wholesale & retail | 2026 |
| Dean Quartermaine Limited | Professional & scientific | 2020 |
| Deep Carrs Management Company Ltd | Real estate | 2018 |
| Delen Mechanic Ltd | Wholesale & retail | 2019 |
| Delikatesy Grocery Limited | Wholesale & retail | 2020 |
| Delta Engineering Limited | Professional & scientific | 2022 |
| Demrs Ltd | Construction | 2015 |
| Denver Transport Ltd | Transport & logistics | 2021 |
| Depeg Ltd | Information & communication | 2018 |
| Desert Rose Global Ltd | Professional & scientific | 2026 |
| Desire Inns Ltd | Hospitality | 2024 |
| Desla Care Agency Ltd | Administrative & support | 2018 |
| Desla Courier Services Ltd | Transport & logistics | 2025 |