| Darda Ltd. | Real estate | 2022 |
| Dark Angel Piercing LP | | 2016 |
| Dark Matter Distillers Limited | Manufacturing | 2012 |
| Darkhorse Hospitality Ltd | Hospitality | 2022 |
| Darkmana Ltd | Manufacturing | 2024 |
| Darren Blake Joinery Ltd | Manufacturing | 2023 |
| Darren LEE Smith Engineering Limited | Professional & scientific | 2017 |
| Darvelstar Limited | Professional & scientific | 1997 |
| Dary Logistics UK Ltd | Administrative & support | 2017 |
| Dary Renovation Ltd | Construction | 2015 |
| Daryan Properties Ltd | Real estate | 2021 |
| Das-Rema Engineering Ltd | Professional & scientific | 2013 |
| Dash Aesthetics Ltd | Other services | 2022 |
| Dash Properties Limited | Real estate | 1997 |
| Dashstream Limited | Other services | 1990 |
| Data Enabled Limited | Information & communication | 2017 |
| Data Shunt Ltd | Information & communication | 2017 |
| Data Understood Ltd | Information & communication | 2018 |
| Data Visionaries Ltd | Information & communication | 2026 |
| Databotix Limited | Information & communication | 2016 |
| Dataspore Ltd | Information & communication | 2025 |
| Datia IT Ltd | Information & communication | 2020 |
| Datong Information Ltd | Information & communication | 2020 |
| Davada Electrical Engineering Ltd | Professional & scientific | 2023 |
| Dave Johnstone Joinery & Tiling Services Ltd | Construction | 2005 |
| Davick Limited | Professional & scientific | 2015 |
| David Barret Energy Services Ltd | Professional & scientific | 2025 |
| David Birkmyre Limited | Financial services | 1996 |
| David Chouman Architect Limited | Professional & scientific | 2007 |
| David Coupland Joinery Ltd | Construction | 2014 |
| David E Sutherland & Co Limited | Professional & scientific | 2011 |
| David Gamble Ltd | Health & social care | 2025 |
| David Jack Associates Limited | Professional & scientific | 2019 |
| David Law Golf Limited | Arts & recreation | 2018 |
| David Mcdonald Plumbing & Heating Ltd | Construction | 2008 |
| David Ogston Subsea Controls Ltd | Professional & scientific | 2012 |
| David Paterson General Engineers Limited | Administrative & support | 2001 |
| David Reid Medcal Consultancy Ltd | Administrative & support | 2015 |
| David Scott Licensing Limited | Administrative & support | 2024 |
| David Stephen Consultancy Ltd | Professional & scientific | 2023 |
| David W Fyfe Limited | Professional & scientific | 2006 |
| David Wallace Contracts Ltd | Professional & scientific | 2019 |
| Davidson & Wilson Limited | Transport & logistics | 1995 |
| Davidson Consultants (Leeds) Ltd | Professional & scientific | 2021 |
| Davidson Financial Services Ltd | Professional & scientific | 2022 |
| Davidson Mechanical Services Ltd | Professional & scientific | 2023 |
| Davidson Project Management Solutions Ltd | Mining & quarrying | 2026 |
| Davidson Projects Ltd | Construction | 2025 |
| Davidson Smith Architects Ltd | Professional & scientific | 2020 |
| Davies Newman Property Limited | Real estate | 2011 |
| Davies Plushkis Ltd | Information & communication | 2021 |
| Davoy Limited | Professional & scientific | 2009 |
| Dawa Innovation Ltd | Information & communication | 2023 |
| Dawn James Ltd | Real estate | 2025 |
| Dawntech Limited | Professional & scientific | 1991 |
| DAWSO7V Limited | Construction | 2025 |
| Dawson Energy Limited | Construction | 2004 |
| Day-Ree Produce Ltd | Wholesale & retail | 2025 |
| DAY2DAY Energy Ltd | Wholesale & retail | 2022 |
| DAY2DAY Express Ltd | Transport & logistics | 2025 |
| Daynart Limited | Health & social care | 2012 |
| DB Consult Ltd | Professional & scientific | 2014 |
| DB Energy Ltd | Professional & scientific | 2022 |
| DB Roofing and Maintenance Ltd | Construction | 2026 |
| DB Services (PHD) Ltd | Construction | 2016 |
| DB Sound & Productions Ltd | Manufacturing | 2024 |
| DBK One Limited | Professional & scientific | 2021 |
| DBK Two Limited | Professional & scientific | 2021 |
| DC Bookkeeping & Accountancy Ltd | Professional & scientific | 2018 |
| DC Diesel Engineering Limited | Manufacturing | 2016 |
| DC Sliding Wardrobes Ltd | Construction | 2018 |
| DCB Consultancy and Management Ltd | Professional & scientific | 2022 |
| Dccservices Ltd | Administrative & support | 2024 |
| DCF Design Consultants Ltd. | Professional & scientific | 2010 |
| Dcfxl Limited | Other services | 2023 |
| Dcisions Limited | Wholesale & retail | 2025 |
| DCM Pubs Ltd | Hospitality | 2019 |
| DCM Subsea Ltd | Other services | 2021 |
| DCM Ventures Limited | Administrative & support | 2024 |
| Dcowie Ventures Ltd | Real estate | 2024 |
| DD Advanced Coaching (Shire) Ltd | Arts & recreation | 2024 |
| DD Advanced Coaching Ltd | Arts & recreation | 2022 |
| DD Agencies Ltd | Extraterritorial | 2021 |
| DD Design's (Scotland) Ltd | Administrative & support | 2023 |
| DDK Positioning Limited | Manufacturing | 2016 |
| DDP Contractors Ltd | Construction | 2016 |
| DE Community Hub CIC | Information & communication | 2026 |
| DE Lege Artis Ltd | Wholesale & retail | 2025 |
| De-Glory Aberdeen Ltd | Wholesale & retail | 2025 |
| De-Grand Eateries Ltd | Hospitality | 2023 |
| De-Luxe Office Cleaners Limited | Administrative & support | 2026 |
| Dead Wheels UK Ltd | Wholesale & retail | 2025 |
| Deadline Design Limited | Professional & scientific | 1995 |
| Deals by DAN Ltd | Wholesale & retail | 2026 |
| Dealtee Limited | Construction | 2007 |
| Dealzworld Ltd | Wholesale & retail | 2025 |
| Dean Stott Group Limited | Arts & recreation | 2016 |
| Dean West Huntly LLP | | 2022 |
| Deancourt Limited | Real estate | 2002 |
| Debrik Engineering Consultant Limited | Professional & scientific | 2022 |