| CSL Traffic Management Equipment Hire Limited | Administrative & support | 2020 |
| CSV Studio Ltd | Information & communication | 2020 |
| CT Book Keeping Limited | Professional & scientific | 2014 |
| CTB Services Limited | Construction | 2006 |
| CU MU Property Ltd | Real estate | 2024 |
| Cuckoo Properties (Notts) Limited | Real estate | 2025 |
| Curiosity Corner Ltd | Manufacturing | 2020 |
| Custom Detailing Limited | Wholesale & retail | 2017 |
| Custom Packing Solutions Limited | Real estate | 2003 |
| CVL Services (Lincolnshire) Limited | Construction | 2012 |
| CW Vigilant Services Ltd | Administrative & support | 2025 |
| CXL Properties Limited | Real estate | 2017 |
| D H Loates Limited | Agriculture & fishing | 2017 |
| D Louth Plumbing and Heating Ltd | Construction | 2017 |
| D&L Construction Retford Ltd | Construction | 2025 |
| D. L. Hirst Plumbing & Heating Ltd | Manufacturing | 2013 |
| D.Clark Building Contractors Limited | Construction | 2017 |
| D.J Marriott Electrical Ltd | Construction | 2023 |
| D1 Kitchen Limited | Hospitality | 2025 |
| DA Nobrega Estates Ltd | Real estate | 2026 |
| Dabble Enterprises Limited | Extraterritorial | 2014 |
| Dack INK Ltd | Manufacturing | 2022 |
| Dairy Process Solutions Limited | Professional & scientific | 2025 |
| Dale Stevens Art Limited | Arts & recreation | 2022 |
| Danielle Sandhu Ltd | Professional & scientific | 2017 |
| Danso Holdings Limited | Financial services | 2016 |
| Darbys Limited | Professional & scientific | 2000 |
| Daril Ltd | Real estate | 2021 |
| Darlton Laurels Limited | Agriculture & fishing | 2019 |
| Datacentre Pro Limited | Information & communication | 2024 |
| David Halford Engineering Ltd | Professional & scientific | 2012 |
| David Lovell Ltd | Other services | 2005 |
| David Mcmurray Limited | Construction | 2023 |
| David Meares Ltd | Transport & logistics | 2017 |
| David Tingle Project Services Ltd | Construction | 2021 |
| Day Dream Desserts T/A THIRTY25 Limited | Manufacturing | 2021 |
| Daynes Group Limited | Financial services | 2022 |
| Daynes Monumental Ltd | Other services | 2012 |
| Daynes Property Management Limited | Real estate | 2019 |
| DBW Ecom Ltd | Professional & scientific | 2024 |
| DC Energy Limited | Professional & scientific | 2018 |
| DCO Ventures I Limited | Real estate | 2004 |
| Dcuk Life Limited | Wholesale & retail | 2014 |
| DD Tralex Ltd | Wholesale & retail | 2012 |
| DDL Estates Limited | Construction | 2024 |
| DEA Aviation Limited | Transport & logistics | 2006 |
| DEA Holdings Limited | Professional & scientific | 2016 |
| Dean Pearcy Professional Services Ltd | Professional & scientific | 2008 |
| Decibel Biopharm Limited | Wholesale & retail | 2018 |
| Deck IT OUT Limited | Construction | 2019 |
| Deen Raza Holdings Ltd | Financial services | 2026 |
| Deli & Dine OUT Ltd | Hospitality | 2026 |
| Deli and Dining Ltd | Hospitality | 2026 |
| Delta 2018 Limited | Transport & logistics | 2018 |
| Delta Civils Limited | Construction | 2025 |
| Deme Group Limited | Real estate | 2025 |
| Demis Fish & Chips Ltd | Hospitality | 2026 |
| Dendrochronological Consultancy Limited | Professional & scientific | 2006 |
| Denniff Farms Ltd | Agriculture & fishing | 2012 |
| Derbyshire Readymix Ltd | Manufacturing | 2019 |
| Dermahaus Ltd | Other services | 2025 |
| Destination Doncaster Ltd | Information & communication | 2005 |
| Devonshire 1963 Limited | Extraterritorial | 2013 |
| DG Maunder Ltd | Real estate | 2022 |
| DH Construction & Development Ltd | Construction | 2024 |
| Dickson Windows Limited | Construction | 2014 |
| Different Designs Limited | Information & communication | 2012 |
| Diggar Ltd | Construction | 2023 |
| Diggory's Day Nursery Limited | Education | 2021 |
| Dignity Care Network Holdings Ltd | Financial services | 2025 |
| Dignity Care Network Ltd | Health & social care | 2024 |
| Dilly Dilly Limited | Manufacturing | 2018 |
| Direct Response Solutions Ltd | Information & communication | 2020 |
| Direct Sourcing Ingredients Limited | Manufacturing | 2013 |
| Direct Sourcing Manufacturing Ltd | Manufacturing | 2020 |
| Diverse Academies Trust | Education | 2011 |
| Diverse Electrical Solutions Retford Limited | Construction | 2023 |
| Diviti Developments Limited | Information & communication | 2025 |
| DJL Management Services Ltd | Construction | 2025 |
| DJS Contracting Ltd | Professional & scientific | 2012 |
| Dmfit (UK) Ltd | Wholesale & retail | 2003 |
| DMS Lifting Services Limited | Transport & logistics | 2014 |
| DMS Property Management Ltd | Real estate | 2016 |
| DN 22 Technical Limited | Information & communication | 2012 |
| DN22 Plumbing Solutions Limited | Construction | 2018 |
| DN22 Sparks N Stuff Ltd | Construction | 2025 |
| DN22 T&L Limited | Administrative & support | 2021 |
| Doden Ltd | Extraterritorial | 2018 |
| Dominion Liquids Ltd | Manufacturing | 2022 |
| DON Housing Ltd | Real estate | 2024 |
| Doncaster Moto Parc Limited | Arts & recreation | 2013 |
| Doncaster.Co.Uk Limited | Information & communication | 2000 |
| Dormy Properties Limited | Real estate | 2013 |
| Dotether Media Ltd | Information & communication | 2025 |
| Douglass Stour Limited | Real estate | 2022 |
| DP Mechanical Engineering Ltd | Manufacturing | 2024 |
| DP Tomato Limited | Wholesale & retail | 2021 |
| DPO Consultancy Limited | Professional & scientific | 2020 |
| DR Andrew Greenhalgh Ltd | Health & social care | 2023 |
| DR Jennifer Marshall Limited | Other services | 2018 |