| CTS Renovations Limited | Construction | 2026 |
| Culture Minds Ltd | Professional & scientific | 2024 |
| Cunningham FOX Holdings Limited | Hospitality | 2017 |
| CUP 19 Bnprp Limited | Hospitality | 2025 |
| Custom Crypto Ltd | Information & communication | 2026 |
| Custom Electrics Ltd | Construction | 2021 |
| CW Electrical Leeds Ltd | Construction | 2024 |
| CWC Creative Limited | Wholesale & retail | 2025 |
| CWT Projects Ltd | Construction | 2024 |
| CZG Investments Ltd | Hospitality | 2022 |
| D Ward Consulting Limited | Health & social care | 2023 |
| D&D Accountancy & Taxation Ltd | Professional & scientific | 2014 |
| D&D Business Services Ltd | Health & social care | 2021 |
| D&D Housing Ltd | Real estate | 2015 |
| D&M Turkish Barbers Ltd | Other services | 2026 |
| D.C. Woodhead and Partners Limited | Professional & scientific | 1964 |
| DAB Tower and Engineering Services Ltd | Construction | 2023 |
| Dabble Delivery Ltd | Wholesale & retail | 2016 |
| Daisy MAE Weddings Limited | Wholesale & retail | 2015 |
| Dakshin Delights Foods Ltd | Hospitality | 2025 |
| Daleside Group Ltd | Wholesale & retail | 2023 |
| Dallas Limousines Ltd | Transport & logistics | 2024 |
| DAN Couriers DM Ltd | Transport & logistics | 2023 |
| DAN Services DM Ltd | Transport & logistics | 2017 |
| Danc Ltd | Information & communication | 2021 |
| Danvus Limited | Transport & logistics | 2025 |
| Dase Properties Ltd | Real estate | 2023 |
| Datalogix Limited | Information & communication | 2008 |
| Dave Spink Photography Limited | Professional & scientific | 2012 |
| Dawett Legal Ltd | Professional & scientific | 2023 |
| Dawson Family Investments Limited | Financial services | 2020 |
| Dawsons House Limited | Real estate | 2015 |
| DB Holdings North Ltd | Financial services | 2025 |
| DBA Home Improvements Ltd | Construction | 2024 |
| DBS Check Limited | Information & communication | 2008 |
| Dbsc Properties Ltd | Real estate | 2024 |
| Dcpropertymaintenance and Waste Ltd | Real estate | 2025 |
| DCS Plumbing and Heating Engineers Ltd | Construction | 2018 |
| Decaro Properties Ltd | Real estate | 2024 |
| Deedco Ltd | Hospitality | 2023 |
| Delegate - Assist Limited | Administrative & support | 2024 |
| Delph Fold Management Company Limited | Households | 2022 |
| Delph Street Limited | Construction | 2016 |
| Dental CPD Network Ltd | Education | 2026 |
| Depster Limited | Administrative & support | 2017 |
| Deseco Ltd | Professional & scientific | 2022 |
| Design Careers Associates Limited | Administrative & support | 2020 |
| Devowt Digital Limited | Information & communication | 2020 |
| Dexed Properties Limited | Real estate | 2026 |
| DG Frames Limited | Construction | 2025 |
| DG Freight Services Ltd | Transport & logistics | 2025 |
| DH2 Solutions Ltd | Administrative & support | 2013 |
| Diamond Direct Mailing Limited | Administrative & support | 1999 |
| Digital Nature Ltd | Information & communication | 2021 |
| Dilapidated Ltd | Real estate | 2025 |
| Diligent Fitness Limited | Other services | 2013 |
| Diligent Health Limited | Arts & recreation | 2017 |
| Discount Furniture Store Yorkshire Ltd | Wholesale & retail | 2025 |
| Discover Protect Limited | Information & communication | 2026 |
| Discovery Analytic Limited | Professional & scientific | 2018 |
| Distinguished Tastings Limited | Hospitality | 2023 |
| Diston Properties Limited | Hospitality | 2011 |
| Divinare Ltd | Professional & scientific | 2025 |
| Dixons of Pudsey (Leeds) Ltd | Wholesale & retail | 2016 |
| DJW Technologies Ltd | Construction | 2022 |
| DK Car Mats Ltd | Wholesale & retail | 2022 |
| DL Bar Management Ltd | Professional & scientific | 2021 |
| DL Golf Club Management Limited | Professional & scientific | 2023 |
| Dlcb Limited | Financial services | 2022 |
| DLW Engineering Ltd | Professional & scientific | 2024 |
| DNC Engineering Services Ltd | Professional & scientific | 2022 |
| DNC Property Investments Ltd | Real estate | 2018 |
| Doski Stores Limited | Wholesale & retail | 2024 |
| Dotbur Holdings Limited | Construction | 2024 |
| Dotbur Homes Limited | Real estate | 2024 |
| DP Derma Consultancy Ltd | Professional & scientific | 2026 |
| DPM Construction (Yorkshire) Ltd | Construction | 2022 |
| DR Ahmer Imtiaz Limited | Health & social care | 2020 |
| DR. H. Medical Aesthetics Ltd | Health & social care | 2025 |
| Dragon Breath Doors Ltd | Manufacturing | 2026 |
| Drain JET Yorkshire Ltd | Water & waste | 2019 |
| Drain JET Yorkshire Surveys Limited | Water & waste | 2022 |
| Dream Properties Yorkshire Limited | Real estate | 2017 |
| Drop Secure Ltd | Wholesale & retail | 2026 |
| DSE Office Ergonomics Limited | Wholesale & retail | 2025 |
| DSE Solutions Limited | Administrative & support | 2010 |
| Dsec Rail Ltd | Construction | 2016 |
| Dsec Trustees Limited | Administrative & support | 2023 |
| Dsforgeworks Ltd | Information & communication | 2026 |
| DSH Accountancy Ltd | Professional & scientific | 2017 |
| Dsteel Investments Ltd | Real estate | 2022 |
| DT BFD Holdings Ltd | Real estate | 2019 |
| Dufort Investments Limited | Wholesale & retail | 2022 |
| Dufton Limited | Wholesale & retail | 2025 |
| Dumela Logistics Limited | Transport & logistics | 2025 |
| Dunne Financial Ltd | Administrative & support | 2025 |
| DUO Pilates Ltd | Other services | 2025 |
| Dura Homes Ltd | Real estate | 2023 |
| Dura Mechanical Ltd | Construction | 2018 |
| Duravax Limited | Manufacturing | 2025 |