| Data Communication Solutions Ltd | Information & communication | 2002 |
| Data Driven Ltd | Information & communication | 2025 |
| Data Installation & Supplies (Northern) Ltd | Information & communication | 1984 |
| Data on Group Limited | Hospitality | 2025 |
| Dataplas Holdings Limited | Real estate | 2022 |
| Dataplas Limited | Manufacturing | 2011 |
| Datastand Ltd | Professional & scientific | 2019 |
| Datatronix and Associates Ltd | Information & communication | 2021 |
| Date Box Ltd | Wholesale & retail | 2025 |
| Datebakes Ltd | Manufacturing | 2024 |
| Dave Atkinson Associates Ltd | Health & social care | 2012 |
| Davencraft Ltd | Real estate | 2018 |
| Davenport Marquee Ltd | Hospitality | 2026 |
| Davetheangrytrucker Ltd | Information & communication | 2025 |
| David Bingham Architecture Limited | Professional & scientific | 2024 |
| David Blockley Limited | Wholesale & retail | 2022 |
| David Gibson Developments Limited | Construction | 2001 |
| David Healthcare Limited | Health & social care | 2022 |
| David Hodes Limited | Wholesale & retail | 2007 |
| David LEY Commercial Vehicle Services Limited | Wholesale & retail | 2014 |
| David Stead Project Marketing Limited | Professional & scientific | 2003 |
| David Whiteoak Electrical +Solar Limited | Construction | 2023 |
| Davies Air Conditioning Limited | | 1974 |
| Davis Marking Ltd | Education | 2023 |
| Davis Wealth Management Limited | Financial services | 2018 |
| Davison Fencing Employee Ownership Trustee Limited | Professional & scientific | 2021 |
| Davison Fencing Holdings Limited | Professional & scientific | 2020 |
| Davison Fencing Limited | Manufacturing | 2008 |
| Davy Holdings (Bradford) Ltd | Professional & scientific | 2024 |
| Davy Properties Limited | Real estate | 2014 |
| Davy Textiles Limited | Manufacturing | 2008 |
| Dawar Travels Ltd | Transport & logistics | 2025 |
| Dawat-E-Islami UK | Other services | 2005 |
| Dawett Enterprise Limited | Construction | 2018 |
| Dawn Diverse Women's Network CIC | Information & communication | 2025 |
| Dawn Routh Professional Dog Grooming Ltd | Other services | 2024 |
| Dawson Design Limited | Manufacturing | 2019 |
| Dawson Landscapes Yorkshire Limited | Administrative & support | 2018 |
| Dawson Williamson Ltd | Professional & scientific | 2003 |
| Daxen Investments Limited | Real estate | 2024 |
| Daxen Spilsby Ltd | Water & waste | 2021 |
| Day to Day Stores(Bd) Ltd | Wholesale & retail | 2025 |
| Day to Day Traders Ltd | Wholesale & retail | 2021 |
| Daya Fashions Limited | Wholesale & retail | 2019 |
| Daya Foods Ltd | Wholesale & retail | 2021 |
| Daylight Management Systems Limited | Manufacturing | 2000 |
| Day’S Developments Ltd | Construction | 2023 |
| DAZ in the HAT Radio Community Interest Company | Information & communication | 2024 |
| Dazek Enterprises Ltd | Wholesale & retail | 2025 |
| Daztec Ltd | Wholesale & retail | 2025 |
| Dazzle Castle Limited | Health & social care | 2025 |
| Dazzle LAB Ltd | Professional & scientific | 2023 |
| DB 51 Limited | Other services | 2024 |
| DB Automotive Tools Ltd | Wholesale & retail | 2023 |
| DB Homes & Properties Limited | Real estate | 2025 |
| DB Online Store Ltd | Wholesale & retail | 2025 |
| DBD Yorkshire Ltd | Health & social care | 2026 |
| DBK Electrical Ltd | Administrative & support | 2017 |
| Dboom Properties Limited | Hospitality | 2025 |
| DC City Centre Ltd | Hospitality | 2022 |
| DC Developments and Building Services Ltd | Construction | 2022 |
| DC Maintenance Yorkshire Ltd | Manufacturing | 2024 |
| DCA Universalconstruction Ltd | Construction | 2026 |
| DCD Transport Ltd | Transport & logistics | 2019 |
| DCG Scaffolding Hire Ltd | Construction | 2024 |
| DCN Business Consultants Ltd | Administrative & support | 2019 |
| Dcrest Ltd | Hospitality | 2021 |
| DCS Cleaning Services (Yorkshire) Ltd | Administrative & support | 2022 |
| DCS2 Limited | Construction | 2018 |
| DD Construction and Groundworks (Yorkshire) Limited | Construction | 2021 |
| DD Davis Properties UK Ltd | Households | 2026 |
| DD Printing Limited | Other services | 2016 |
| DD Salon Supplies Ltd | Wholesale & retail | 2021 |
| DDC Bradford Limited | Wholesale & retail | 2024 |
| Ddlau Ltd | Transport & logistics | 2023 |
| DE Group ( Yorkshire) Limited | Financial services | 2021 |
| DE Inns Limited | Hospitality | 2022 |
| DE Lacy Properties Ltd | Real estate | 2015 |
| DE Leisure Ltd | Professional & scientific | 2020 |
| DE Luca Hair Boutique Limited | Other services | 2011 |
| DE Mandeville Gate Management Limited | Real estate | 1992 |
| DE Taverns Limited | Hospitality | 2016 |
| DE VEW Ltd | Hospitality | 2025 |
| Deacon Fitness Limited | Arts & recreation | 2021 |
| Dead Clever Ltd | Professional & scientific | 2015 |
| Deaf Muslims Ltd | Information & communication | 2022 |
| Deaf Time CIC | Information & communication | 2023 |
| DEAL2PASS Limited | Other services | 2022 |
| Dealocity Limited | Wholesale & retail | 2025 |
| Deals for YOU Ltd | Wholesale & retail | 2018 |
| Deals on Kar's Ltd | Other services | 2019 |
| DEALS-STEALS786 Ltd | Wholesale & retail | 2025 |
| Dealz Ltd | Wholesale & retail | 2026 |
| Dean Admin Services Limited | Administrative & support | 2022 |
| Dean and Brothers Limited | Households | 2025 |
| Dean and Co Mortgages Ltd | Financial services | 2025 |
| Dean Craven Driving Ltd | Administrative & support | 2018 |
| Dean Eco Services Limited | Construction | 2023 |
| Dean Harrison Racing Limited | Arts & recreation | 2014 |
| Dean Holdings Ltd | Real estate | 2024 |