| D.T. Financial Consultants Limited | Professional & scientific | 1986 |
| Dafil Ltd | Construction | 2023 |
| Dairylee Investments Ltd | Financial services | 2025 |
| Dakin Industries Limited | Professional & scientific | 2013 |
| Dakin-Flathers Limited | Manufacturing | 1931 |
| Dakota Bond Limited | Real estate | 2015 |
| Dakotadirect Limited | Transport & logistics | 2018 |
| Dale Morgan Maintenance Ltd | Professional & scientific | 2025 |
| Dale Price Flooring Solutions Limited | Construction | 2019 |
| Daley Print Ltd | Manufacturing | 2022 |
| Dalquinto Limited | Manufacturing | 1999 |
| Dam-It Ltd | Construction | 2020 |
| Dance Fusion (Yorkshire) Ltd | Health & social care | 2015 |
| Dani Ltd | Other services | 2018 |
| Daniel Dickinson Design Ltd | Professional & scientific | 2017 |
| Daniel Matthews Ltd | Transport & logistics | 2024 |
| Darkwater Aquatics Ltd | Agriculture & fishing | 2016 |
| Darren Rayneau Consultancy Limited | Education | 2016 |
| Darrington Church of England Primary School | Education | 2013 |
| Darrington Equestrian Centre Limited | Arts & recreation | 2013 |
| Darthvaper Limited | Wholesale & retail | 2013 |
| Data Yorkshire Ltd | Transport & logistics | 2011 |
| David De-Val Magic Limited | Wholesale & retail | 2014 |
| David Hill Plumbers Limited | Construction | 2001 |
| David Hopkinson Investments Limited | Real estate | 2022 |
| Davies Properties Limited | Real estate | 2016 |
| Dawn Chapman Ltd | Hospitality | 2018 |
| Dawsons Site Installations Ltd | Professional & scientific | 2024 |
| DB Win-Tech (Engineering Services) Ltd | Professional & scientific | 2023 |
| Dbeed Ltd | Information & communication | 2025 |
| Dbrennan Investments Ltd | Financial services | 2025 |
| DC Civils Ltd | Construction | 2024 |
| DC Elec Limited | Construction | 2020 |
| DC Print (Yorkshire) Ltd | Manufacturing | 2011 |
| Dcon Properties Ltd | Real estate | 2022 |
| DDA Holdings Ltd | Construction | 2025 |
| DDE Properties Ltd | Real estate | 2025 |
| Ddjb Limited | Hospitality | 2023 |
| Ddjs Properties Ltd | Real estate | 2025 |
| DE Lacy CFO Limited | Professional & scientific | 2024 |
| Deans Jewellery Limited | Wholesale & retail | 2026 |
| Dearne Valley Property Ltd | Real estate | 2021 |
| Debs Toys Limited | Wholesale & retail | 2019 |
| Dellpau Ltd | Construction | 2018 |
| Delta Engineering Solutions Ltd | Manufacturing | 2012 |
| Delta Worldwide Ltd | Wholesale & retail | 2018 |
| Deluxe Beauty Bar Ltd | Other services | 2026 |
| Demco Direct Ltd | Wholesale & retail | 2019 |
| Dentures by Dominic Limited | Health & social care | 2018 |
| Dermaloch Limited | Wholesale & retail | 2018 |
| Design a Kitchen (UK) Limited | Professional & scientific | 2020 |
| Devoke Consultancy Ltd | Information & communication | 2015 |
| DG Autocare Ltd | Wholesale & retail | 2022 |
| DG Catering Ltd | Hospitality | 2014 |
| DGC Properties Ltd | Real estate | 2021 |
| DH Nguyen Ltd | Other services | 2024 |
| DH Print Services Limited | Manufacturing | 2011 |
| DHD Kettering Limited | Extraterritorial | 2010 |
| Diammou Ltd | Transport & logistics | 2017 |
| Diamond Defenders Limited | Wholesale & retail | 2014 |
| Diamond Folly Limited | Real estate | 2025 |
| DIG Utilities Ltd | Construction | 2022 |
| Digger Pro Ltd | Construction | 2021 |
| Dignity Homecare (Yorkshire) Ltd | Health & social care | 2011 |
| Dignity Residential (Yorkshire) Ltd | Health & social care | 2016 |
| Dimos Property Limited | Real estate | 2019 |
| Diner 51 Limited | Hospitality | 2016 |
| Direct Automotive & Performance Ltd | Wholesale & retail | 2024 |
| Direct Component Fabrications Ltd | Manufacturing | 2023 |
| Direct Discounts Online Limited | Wholesale & retail | 2010 |
| Direct Fabrications (Yorkshire) Ltd | Manufacturing | 2014 |
| Direct PHS Limited | Construction | 2018 |
| Direct Sales Online Limited | Extraterritorial | 2010 |
| DIRECTING2 Limited | Manufacturing | 2016 |
| Discount Padel Holidays Ltd | Hospitality | 2025 |
| Diva Aesthetics & Beauty Ltd | Other services | 2026 |
| Dixon Amusements Ltd | Arts & recreation | 2024 |
| Dixon Entertainment/Media Ltd | Hospitality | 2019 |
| Dixon Leisure Group (UK) Limited | Other services | 2025 |
| Diya Ltd | Other services | 2018 |
| DJ Civils & Grab Limited | Construction | 2021 |
| DJ Waring Ltd | Construction | 1998 |
| DJL Fencing Contractors Ltd | Construction | 2008 |
| DJL Properties Ltd | Real estate | 2017 |
| DK Drive Limited | Transport & logistics | 2019 |
| Dkmj Properties Ltd | Real estate | 2025 |
| DL Property Solutions Limited | Real estate | 2021 |
| DL Sign Installation Ltd | Construction | 2018 |
| DL Training Services Ltd | Construction | 2015 |
| DLA 2026 Ltd | Other services | 2026 |
| Dm&Print Solutions Ltd | Manufacturing | 2009 |
| DMC Innovations Ltd | Construction | 2023 |
| DMG Property Services Limited | Construction | 2025 |
| DMW Building Investment Ltd | Real estate | 2024 |
| Dnamor Ltd | Transport & logistics | 2021 |
| DNM Refrigeration Limited | Manufacturing | 2011 |
| DNT HGV Services Limited | Wholesale & retail | 2020 |
| Dockerty's Properties Limited | Real estate | 1994 |
| DOE Engineering Ltd | Construction | 2025 |
| Dona's Caffe and Deli Ltd | Hospitality | 2025 |