| Drivewise Motors Ltd | Wholesale & retail | 2024 |
| Drivexuk Ltd | Wholesale & retail | 2026 |
| Driving Dynamiks Ltd | Information & communication | 2018 |
| Driving Force (UK) Limited | Administrative & support | 1998 |
| Driving WIZ Ltd | Education | 2023 |
| Drmattwjohnson Ltd | Health & social care | 2019 |
| Dron Limited | Information & communication | 2015 |
| Drop of OUD Limited | Wholesale & retail | 2024 |
| DROP2TRADE Ltd | Information & communication | 2023 |
| Dropcard Limited | Wholesale & retail | 2025 |
| Droplytics Ltd | Information & communication | 2026 |
| Droppers Ltd | Arts & recreation | 2024 |
| Dropskoks Ltd | Transport & logistics | 2019 |
| Droptothetop Ltd | Wholesale & retail | 2025 |
| Dropzone Business Limited | Wholesale & retail | 2025 |
| DRP Partners Ltd | Professional & scientific | 2020 |
| DRS Automotives Limited | Wholesale & retail | 2020 |
| DRS Mortgage Services Limited | Financial services | 2021 |
| Drylining Safety Ltd | Construction | 2023 |
| Drywall & Project Ltd | Construction | 2025 |
| DS & BD Properties Ltd | Real estate | 2021 |
| DS & SON Plant & Access Services Ltd | Transport & logistics | 2022 |
| DS Heer Limited | Construction | 2025 |
| DS Millers Park Ltd | Real estate | 2026 |
| DS Real Estate Group Ltd | Real estate | 2020 |
| DS RO Profiles Ltd | Construction | 2025 |
| DS Vision Ltd | Financial services | 2026 |
| DS01 CW Limited | Professional & scientific | 2024 |
| DSA Global Group Ltd | Other services | 2025 |
| Dsacceddu Limited | Information & communication | 2013 |
| DSB Constructions Ltd | Construction | 2022 |
| DSD Investments Ltd | Real estate | 2023 |
| Dshees Limited | Wholesale & retail | 2022 |
| Dshrtech Ltd | Wholesale & retail | 2025 |
| DSJ Contractors Limited | Construction | 2006 |
| DSL Auto Group Limited | Wholesale & retail | 2024 |
| DSL Removals&Logistics Limited | Transport & logistics | 2025 |
| DSM Decors Limited | Construction | 2017 |
| DSP Belfry Limited | Transport & logistics | 2015 |
| Dsrb Lift Consultants Limited | Professional & scientific | 2024 |
| DSS Recruitment Ltd | Administrative & support | 2021 |
| DT Careplus Ltd | Other services | 2010 |
| DT Construction Building Services Ltd | Construction | 2016 |
| DT Luxury Limited | Wholesale & retail | 2026 |
| DTC Delivery Ltd | Transport & logistics | 2026 |
| Dtchand Limited | Real estate | 2015 |
| Dtech World Ltd | Wholesale & retail | 2026 |
| DTI Logistics Limited | Transport & logistics | 2024 |
| DTK Housing Solutions Ltd | Hospitality | 2018 |
| DTS Construction Solutions Limited | Construction | 2019 |
| DTS Electrical Solutions Limited | Construction | 2018 |
| DTS Retail Ltd | Wholesale & retail | 2024 |
| DUA International Trading Ltd | Wholesale & retail | 2021 |
| Duaa NUR Ltd | Other services | 2025 |
| Dubai Property Show London Limited | Administrative & support | 2026 |
| Dubart Ltd | Transport & logistics | 2026 |
| Dublin' Laundrette Ltd | Other services | 2023 |
| Dubs Productions Ltd | Other services | 2024 |
| Duchocolatemaison Limited | Hospitality | 2024 |
| Ducu Constructions Ltd | Construction | 2021 |
| Ducu Transport Constructions Limited | Construction | 2025 |
| Dudley Auto Service Ltd | Wholesale & retail | 2020 |
| Dudley Food and Wine Limited | Wholesale & retail | 2020 |
| Dudley Mini Market Ltd | Wholesale & retail | 2025 |
| Duffy Pillay Consultants Ltd | Health & social care | 2017 |
| Dugah Logistics Ltd | Wholesale & retail | 2026 |
| Duguid Anderson Contractors Ltd | Construction | 2021 |
| Duka Projects Ltd | Construction | 2013 |
| Dukay Ltd | Other services | 2022 |
| Dumecs Healthcare Ltd | Health & social care | 2025 |
| Dumis East Ocean Ltd | Hospitality | 2020 |
| Dunamis Investments and Properties Limited | Real estate | 2019 |
| Dunamis Medical Services Limited | Health & social care | 2014 |
| Dunamis Pharmaceutical Services Limited | Wholesale & retail | 2009 |
| Dunamis PVT Ltd | Health & social care | 2018 |
| Duncan Welch & Co Limited | Households | 2022 |
| Dunhel Ltd | Wholesale & retail | 2020 |
| Dunhil Collection Ltd | Wholesale & retail | 2025 |
| Dunmow Court (Luton) Limited | Households | 1970 |
| Dunross Estates Limited | Real estate | 2017 |
| Dunross Plastering Ltd | Construction | 2013 |
| Duns Developments Ltd | Construction | 2018 |
| Dunsco TRD Co Limited | Information & communication | 2025 |
| Dunstable Airport Taxis Limited | Transport & logistics | 2025 |
| Dunstable Bakehouse Limited | Wholesale & retail | 2014 |
| Dunstable Cabs Limited | Administrative & support | 2018 |
| Dunstable Driver Training Ltd | Administrative & support | 2016 |
| Dunstable Kebab House Limited | Hospitality | 2023 |
| Dunstable MAK Limited | Hospitality | 2024 |
| Dunstable Mortgage Advice Centre Limited | Financial services | 2019 |
| Dunstable Road Bakes Limited | Wholesale & retail | 2024 |
| DUQ Building Ltd | Manufacturing | 2025 |
| Dur-E-Adan Ltd | Wholesale & retail | 2025 |
| Durda Limited | Construction | 2025 |
| Durrani CA Ltd | Administrative & support | 2024 |
| Durranico AI Ltd | Administrative & support | 2025 |
| Durranico CH Ltd | Administrative & support | 2025 |
| Durranico FR Ltd | Administrative & support | 2025 |
| Durranico IP Ltd | Administrative & support | 2025 |
| Durranico MI Ltd | Administrative & support | 2025 |