| D J Contractors (Northern) Limited | Administrative & support | 2005 |
| D J H Construction Limited | Construction | 2003 |
| D J Randles Limited | Professional & scientific | 2025 |
| D J Taylor Ltd | Hospitality | 2019 |
| D K Fabrication PVT Ltd | Manufacturing | 2025 |
| D K Signs Limited | Manufacturing | 2005 |
| D Kyle Construction Limited | Construction | 2007 |
| D L Benson Accountants Limited | Professional & scientific | 2010 |
| D Ladden-Hall Ltd | Arts & recreation | 2023 |
| D LDT Limited | Transport & logistics | 2020 |
| D M Media Limited | Information & communication | 2013 |
| D M Sellars Plumbing Limited | Construction | 2025 |
| D Marshall (Properties) Limited | Real estate | 1986 |
| D Myers & Sons Limited | Construction | 2026 |
| D N E Vend Limited | Manufacturing | 2023 |
| D of Y (GH) Ltd | Hospitality | 2018 |
| D P a Fletcher (Builders) Limited | Construction | 2007 |
| D P Building Leeds Ltd | Construction | 2020 |
| D P Joinery (Yorkshire) Ltd | Construction | 2022 |
| D P Mcnair Roofing Contractors Limited | Construction | 2003 |
| D P S Mackenzie & Co | Administrative & support | 2011 |
| D Parker Limited | Other services | 2004 |
| D Penny and Sons Planthire .Haulage Ltd | Construction | 2014 |
| D Ridley Consultancy Ltd | Information & communication | 2020 |
| D Rocks Restaurant & Takeaway Ltd | Manufacturing | 2024 |
| D S G Services (UK) Limited | Manufacturing | 2003 |
| D S Signs Limited | Manufacturing | 1997 |
| D S Walker Limited | Professional & scientific | 2025 |
| D S Wootton Heating & Plumbing Ltd | Construction | 2026 |
| D Sandham & Sons Quality Meats Limited | Wholesale & retail | 2021 |
| D Schofield Electrical Services Ltd | Construction | 2016 |
| D Smith Window Cleaning Ltd | Administrative & support | 2024 |
| D T C Consultancy Services Limited | Administrative & support | 2018 |
| D Thorpe Services Ltd | Administrative & support | 2014 |
| D V J Cleaning Services Limited | Other services | 2020 |
| D W Electrical (Leeds) Ltd | Construction | 2014 |
| D W International Ltd | Administrative & support | 2017 |
| D W Properties Leeds Limited | Real estate | 2017 |
| D W Regulatory Consultants Limited | Administrative & support | 2002 |
| D Wainwright Holdings Limited | Financial services | 2022 |
| D Y Graphics Ltd | Manufacturing | 2003 |
| D&A CLOTHES4YOU Ltd | Wholesale & retail | 2022 |
| D&A Diamond Properties Ltd | Real estate | 2024 |
| D&A Leisure Vehicle Services Ltd | Wholesale & retail | 2024 |
| D&A Pharma Services Ltd | Other services | 2019 |
| D&B 360 Ltd | Professional & scientific | 2024 |
| D&B Property Ltd | Real estate | 2019 |
| D&C Events Ltd | Hospitality | 2016 |
| D&C Pharmacy Services Limited | Wholesale & retail | 2005 |
| D&D Nickols Transport Leeds Limited | Transport & logistics | 2017 |
| D&D Precision Engineering Limited | Manufacturing | 2022 |
| D&D Space Ltd | Real estate | 2022 |
| D&D Yorkshire Ltd | Real estate | 2026 |
| D&G Assets Ltd | Real estate | 2021 |
| D&G Food Limited | Hospitality | 2025 |
| D&G Property Yorkshire Ltd | Real estate | 2025 |
| D&G Retail Ltd | Wholesale & retail | 2021 |
| D&J Downes Ltd | Hospitality | 2023 |
| D&L Plumbing & Heating Services Ltd | Construction | 2020 |
| D&L Recruitment Services Limited | Administrative & support | 2022 |
| D&M Construction Services Ltd | Construction | 2026 |
| D&P Flooring Ltd | Construction | 2025 |
| D&P Properties Ltd | Construction | 2026 |
| D&R Passive Fire Protection Ltd | Construction | 2026 |
| D&S Leeds Limited | Hospitality | 2021 |
| D&Y Drylining Ltd | Construction | 2017 |
| D&Y I Health Ltd. | Wholesale & retail | 2016 |
| D'Costa Medical Consultancy Limited | Health & social care | 2025 |
| D'Mandem Properties Ltd | Real estate | 2024 |
| D-Comm Ltd | Professional & scientific | 2008 |
| D-Tech Security Services Limited | Energy | 2005 |
| D. Boocock Consultancy Services Limited | Information & communication | 1996 |
| D. Evans Limited | Construction | 1983 |
| D. Mcguire I.R. Limited | Arts & recreation | 2008 |
| D. P. Sheridan Plastering Limited | Construction | 2014 |
| D. Peacock Limited | Wholesale & retail | 1989 |
| D. Pickles Investments | | 1986 |
| D. V. a. Logistics Ltd | Transport & logistics | 2022 |
| D.A.D. Fruits & Exotics Limited | Wholesale & retail | 2007 |
| D.A.S Engineering Services Limited | Manufacturing | 2000 |
| D.A.S Scaffolding Ltd | Construction | 2017 |
| D.A.W Estates Limited | Real estate | 2025 |
| D.A.W. Roofing and Cladding Limited | Construction | 2016 |
| D.C Autocare Yorkshire Ltd | Wholesale & retail | 2025 |
| D.C. Graham & SON (Sherburn) Limited | Wholesale & retail | 1970 |
| D.C.Houghton Ltd | Information & communication | 2011 |
| D.E. Agents Import Export Ltd | Wholesale & retail | 2023 |
| D.E. Electrical (of Leeds) Limited | Manufacturing | 2012 |
| D.E.G Building Limited | Construction | 2025 |
| D.F. King Ltd | Professional & scientific | 2014 |
| D.G. Freight Trustee Limited | Administrative & support | 2023 |
| D.H.Allan & Sons,Limited | Wholesale & retail | 1923 |
| D.I. Silverton Limited | Wholesale & retail | 1975 |
| D.J.B. Plant Limited | Administrative & support | 2005 |
| D.J.M. Fire & Security Limited | Manufacturing | 2006 |
| D.K.L Drylining Ltd | Construction | 2026 |
| D.L.B Systems Ltd. | Construction | 2015 |
| D.L.T. (Organic) Limited | Wholesale & retail | 2008 |
| D.M. Keith (York) Limited | Wholesale & retail | 2007 |
| D.M.G. Access Limited | Manufacturing | 2018 |