| Cottage Style Limited | Wholesale & retail | 2020 |
| Cottage Woodcraft Limited | Manufacturing | 2010 |
| Couldwell Commercial Limited | Real estate | 2023 |
| Couldwell Concrete Flooring Limited | Construction | 2001 |
| Couldwell Consulting Limited | Professional & scientific | 2016 |
| Courier & Click Ltd | Transport & logistics | 2025 |
| Coxlin Ltd | Wholesale & retail | 2026 |
| CPS Locums Ltd | Health & social care | 2016 |
| Crafting Around Ltd | Manufacturing | 2026 |
| CRAFTING4GOOD CIC | Administrative & support | 2017 |
| Cranleigh Services Limited | Wholesale & retail | 2002 |
| Crew Barber Shop Normanton Limited | Other services | 2026 |
| Crowther & Co Property Specialists Limited | Real estate | 2005 |
| CS Access Solutions Limited | Mining & quarrying | 2007 |
| CT Property Yorkshire Limited | Real estate | 2021 |
| Custom Micros (IT) Limited | Manufacturing | 2016 |
| CW Homes & Property Ltd | Real estate | 2017 |
| Czantoria and Market Ltd | Wholesale & retail | 2023 |
| Czantoria Shop Ltd | Wholesale & retail | 2026 |
| D & O Properties Limited | Real estate | 2020 |
| D & P Group Properties Ltd | Real estate | 2023 |
| D Allen Window Cleaning Ltd | Administrative & support | 2023 |
| D Begg Holdings Limited | Financial services | 2019 |
| D H Boxing Limited | Arts & recreation | 2018 |
| D Haigh Window Cleaning Ltd | Administrative & support | 2024 |
| D Lightowler Window Cleaning Ltd | Administrative & support | 2024 |
| D Reather Site Services Ltd | Administrative & support | 2014 |
| D Stan Transport Ltd | Transport & logistics | 2026 |
| D&P Fabricators Holdings Limited | Financial services | 2021 |
| D&P Projects Limited | Construction | 2022 |
| Daley Property Developments Ltd | Households | 2022 |
| Damian Drive Limited | Transport & logistics | 2019 |
| Daniels Normanton Limited | Financial services | 2022 |
| Danzoe Limited | Real estate | 2010 |
| Darren Till Holdings Limited | Financial services | 2024 |
| Daruk Limited | Health & social care | 2011 |
| DB Control Systems Ltd | Manufacturing | 2018 |
| DCB Holdings Limited | Financial services | 1991 |
| DCD Rental Properties Ltd | Real estate | 2023 |
| DCD Utilities Ltd | Construction | 2023 |
| Dcwd Limited | Construction | 2018 |
| Decrobond Limited | Manufacturing | 1997 |
| Dejantrans Ltd | Transport & logistics | 2011 |
| Denis Speed Ltd | Transport & logistics | 2024 |
| DHD Consultants Limited | Professional & scientific | 2017 |
| Diana Holden BID Writing Service Ltd | Professional & scientific | 2018 |
| Dinero X2 Ltd | Wholesale & retail | 2023 |
| Discount Range Services Ltd | Manufacturing | 2017 |
| Dispo Limited | Financial services | 2000 |
| DJT Civils Limited | Construction | 2024 |
| DLD Rigging & Plumbing Ltd | Construction | 2020 |
| DM Appliance Services Limited | Manufacturing | 2020 |
| Doncaster Independent Funeral Services Ltd | Other services | 2024 |
| Doorspek Ltd | Administrative & support | 2022 |
| DP Fabricators Ltd | Manufacturing | 2018 |
| DR Chimaobi Azubuike Clinical Services Limited | Health & social care | 2026 |
| Drawn to Wellness CIC | Health & social care | 2026 |
| Drover Industries Limited | Wholesale & retail | 2020 |
| DRS Electrical Installations Ltd | Construction | 2017 |
| Drycab Limited | Manufacturing | 2018 |
| Dryden Smith Print Limited | Manufacturing | 1992 |
| Ds&Vm Ltd | Construction | 2014 |
| Dsm&Dd Ltd | Transport & logistics | 2016 |
| DT Architectural Design Limited | Professional & scientific | 2024 |
| Duggan Equestrian Ltd | Arts & recreation | 2014 |
| E-K9 Security Ltd | Administrative & support | 2024 |
| Eco Impress Cleaning Solutions Ltd | Administrative & support | 2025 |
| Ectis Information Systems Limited | Information & communication | 2016 |
| EDE Export Limited | Wholesale & retail | 2026 |
| EDE Mart Limited | Wholesale & retail | 2022 |
| Edhgv Logistic Ltd | Transport & logistics | 2024 |
| Edupla Private Ltd | Health & social care | 2024 |
| EFV Capital Ltd | Financial services | 2024 |
| Electric Blue Leeds Limited | Construction | 2024 |
| Electrical Services Yorkshire Ltd | Construction | 2011 |
| Elite Build Investments Ltd | Construction | 2026 |
| Elite Entertainment (Leeds) Ltd | Hospitality | 2017 |
| Elite Fleet Valeting Ltd | Administrative & support | 2026 |
| Elite Motorz Limited | Wholesale & retail | 2017 |
| Elly Trans Ltd | Transport & logistics | 2019 |
| Elrohivision Ltd | Information & communication | 2020 |
| Emily Mini Market Limited | Wholesale & retail | 2024 |
| Emma Littlewood Safety Ltd | Professional & scientific | 2024 |
| Empire House Development Ltd | Real estate | 2016 |
| Emporuk Ltd | Wholesale & retail | 2026 |
| Envy Windows (Properties) Limited | Real estate | 2021 |
| Envy Windows Limited | Construction | 2002 |
| ES Momentum Ltd | Wholesale & retail | 2026 |
| Espoir Ltd | Real estate | 2022 |
| Estate Developments Limited | Professional & scientific | 2018 |
| Ettis on the Highstreet Ltd | Hospitality | 2026 |
| Eughsome Care Solutions Limited | Health & social care | 2016 |
| EVA Rocco Limited | Manufacturing | 2017 |
| Evara One Group Ltd | Financial services | 2026 |
| Events of Yorkshire Ltd | Other services | 2023 |
| EVO (Pensions) Limited | Administrative & support | 2000 |
| EVO Business Supplies Limited | Wholesale & retail | 2014 |
| EVO Global Holdings Limited | Financial services | 2025 |
| EVO Group Services Limited | Professional & scientific | 2007 |
| EVO International Holdings Limited | Financial services | 2025 |