| Display Techniques Limited | Professional & scientific | 2004 |
| Disraeli Gears Ltd | Information & communication | 2020 |
| Disruptive Panda Limited | Professional & scientific | 2024 |
| Distington Moss Wind Farm Limited | Energy | 2025 |
| District Group Ltd | Extraterritorial | 2023 |
| Ditto Consultants Ltd | Professional & scientific | 2023 |
| Divergent Property Development Ltd | Households | 2024 |
| Divine Automotive Limited | Wholesale & retail | 2013 |
| Divine Internet Group Limited | Information & communication | 2005 |
| Divine Kitchens & Bathrooms of Harrogate Ltd | Construction | 2013 |
| Divine Timing Ltd | Other services | 2022 |
| Divvy Limited | Extraterritorial | 2012 |
| Dixon Ryder Limited | Extraterritorial | 2026 |
| Dixons Cleaning Services (Yorkshire) Limited | Administrative & support | 2024 |
| DJ 13 Ltd | Financial services | 2020 |
| DJ Mark Green Ltd | Other services | 2023 |
| Djbscs Limited | Information & communication | 2016 |
| DJC Painting & Decorating Ltd | Construction | 2014 |
| DJD Social Care Consultants Limited | Health & social care | 2015 |
| DJD Training Ltd | Education | 2019 |
| DK Acquisitions Limited | Financial services | 2025 |
| Dkgrow Ltd | Construction | 2017 |
| DKP Consulting Limited | Professional & scientific | 2008 |
| DKP Holdings (2025) Limited | Financial services | 2025 |
| DKP Holdings Limited | Professional & scientific | 2015 |
| DL (Harrogate) Management Company Limited | Households | 2022 |
| DL Griffin Construction Limited | Construction | 2018 |
| DLA Harrogate LLP | | 2011 |
| Dmac Group Limited | Construction | 2020 |
| Dmas Investments Limited | Professional & scientific | 2011 |
| Dmas Leasing Limited | Extraterritorial | 1983 |
| Dmas Property Limited | Real estate | 1898 |
| DMC Marketing Limited | Other services | 2008 |
| Dmcg Consultancy Ltd | Professional & scientific | 2024 |
| DMD (Cable Contractors ) Ltd | Construction | 2019 |
| DNA IOT Ltd | Professional & scientific | 2023 |
| Dnan Ltd | Construction | 2026 |
| DO Words Ltd. | Arts & recreation | 2015 |
| Doability Limited | Wholesale & retail | 2008 |
| Docacc Limited | Professional & scientific | 2019 |
| Dockree Associates Ltd | Professional & scientific | 2016 |
| Docorizon Ltd | Information & communication | 2024 |
| Doctor Cliona Limited | Health & social care | 2024 |
| DOGECO1N Ltd | Extraterritorial | 2021 |
| Dogs Direct UK Limited | Other services | 2023 |
| Dogs Direct UK Tickets Ltd | Wholesale & retail | 2025 |
| Dogzilla Limited | Extraterritorial | 2026 |
| Dolphin Bathrooms Limited | Extraterritorial | 2011 |
| Dolphin International Communications Ltd | Professional & scientific | 2013 |
| Doma Architects Limited | Professional & scientific | 2010 |
| DOMAINO7 Ltd | Wholesale & retail | 2025 |
| DOMAINO9 Ltd | Wholesale & retail | 2025 |
| Domonic Ltd | Extraterritorial | 2013 |
| Domus Perfectum Limited | Construction | 2013 |
| Dont Mess With Yorkshire Ltd | Extraterritorial | 2012 |
| Doodle H R Limited | Administrative & support | 2013 |
| Dopamind Wellness & Performance Ltd | Public administration | 2025 |
| Dormer & Co. Chartered Architects Ltd | Professional & scientific | 2001 |
| Dormer K Ltd | Construction | 2025 |
| Dorogan Consulting Ltd | Extraterritorial | 2012 |
| Doroub Trading and Investment Ltd | Wholesale & retail | 2023 |
| Doruk London Ltd | Hospitality | 2025 |
| DOT + Diode Limited | Information & communication | 2020 |
| Dotcom Limited | Extraterritorial | 2011 |
| Doug Warren Consulting Limited | Professional & scientific | 2025 |
| Douglas Berry Limited | Extraterritorial | 2026 |
| Douglas Rose Limited | Hospitality | 2003 |
| Dove PR Ltd | Professional & scientific | 2016 |
| DPJ Construction Ltd | Construction | 1996 |
| DR and KE Harris Limited | Professional & scientific | 2015 |
| DR DM Bottomley Oncology Limited | Health & social care | 2019 |
| DR Emma Mahoney Consulting Ltd | Health & social care | 2018 |
| DR G Tran Ltd | Health & social care | 2021 |
| DR M B Speight & MRS L Speight LLP | | 2002 |
| DR M.J. Green Limited | Health & social care | 2019 |
| DR Mbekeanis Science Club Ltd | Administrative & support | 2025 |
| DR1LL Ltd | Extraterritorial | 2020 |
| Dragon Road Limited | Extraterritorial | 1987 |
| Drax Storage Solutions Ltd | Other services | 2020 |
| Dream Big Composites Ltd | Manufacturing | 2021 |
| Drewton Crane Limited | Professional & scientific | 2007 |
| Dring Digital Limited | Professional & scientific | 2023 |
| Driver 7 Ltd | Transport & logistics | 2025 |
| Driving Hydrogen Limited | Information & communication | 2024 |
| Drko Apparel Ltd | Wholesale & retail | 2021 |
| Droidscript Ltd | Information & communication | 2017 |
| Drrd Limited | Manufacturing | 2003 |
| Drum & Hoose Limited | Real estate | 2015 |
| Drye (UK) Limited | Wholesale & retail | 2008 |
| Dryftuk Ltd | Wholesale & retail | 2025 |
| DS Adams Consulting Ltd | Professional & scientific | 2021 |
| DSC Accountancy Limited | Professional & scientific | 2016 |
| DSC Accountants Limited | Professional & scientific | 2009 |
| DSC Wealth Managers Limited | Professional & scientific | 2011 |
| DSR Finishing Ltd | Wholesale & retail | 2026 |
| DSS Engineering Services Ltd | Professional & scientific | 2023 |
| DTM (UK) Limited | Information & communication | 2005 |
| DTM (Yorks) Limited | Real estate | 2025 |
| DTM Housing Corporation Limited | Households | 2024 |
| Dtswelding Ltd | Manufacturing | 2023 |