| D M D Joiners Limited | Construction | 2006 |
| D Walker Contracts Ltd | Administrative & support | 2021 |
| D&G First AID Training & Education Ltd | Education | 2025 |
| D.H.Smith Consultancy Limited | Professional & scientific | 2018 |
| D.Young Ventures Ltd | Hospitality | 2025 |
| Dailyfounder Ltd | Information & communication | 2026 |
| Daisy Marketing Limited | Professional & scientific | 2022 |
| Dajo Services Ltd | Transport & logistics | 2026 |
| Dalmunach Distillery Limited | Wholesale & retail | 2001 |
| DAM Geotechnical Services Limited | Professional & scientific | 2004 |
| Danbrojo Limited | Administrative & support | 2023 |
| Dandi Bakes Ltd | Manufacturing | 2024 |
| David Graham Cars Limited | Wholesale & retail | 2002 |
| DCF Joiners & Building Services Limited | Construction | 1988 |
| DDI Consulting Limited | Information & communication | 2005 |
| Defenster (Scotland) Limited | Construction | 2010 |
| Defenster Ltd | Construction | 2025 |
| Defenster Systems Limited | Construction | 2025 |
| Defenster Window Systems Limited | Construction | 2012 |
| DEI Global Limited | Professional & scientific | 2025 |
| Delivery Driver Dave Ltd | Transport & logistics | 2026 |
| Derbyshire Street Group Ltd | Real estate | 2021 |
| Derosa Sports Consultancy Ltd | Education | 2026 |
| Diementions Ltd | Transport & logistics | 2025 |
| Diva Diamond Limited | Other services | 2023 |
| Diving & EOD Ltd. | Administrative & support | 2011 |
| DJM Empowerment Ltd | Administrative & support | 2025 |
| DJM LET Ltd | Real estate | 2022 |
| DLA Valeting Centre Ltd | Wholesale & retail | 2023 |
| DLC Window Cleaning Ltd | Administrative & support | 2026 |
| DM Finance Limited | Administrative & support | 2007 |
| DM Vehicle Hire Ltd | Administrative & support | 2021 |
| Dmbk Limited | Hospitality | 2019 |
| DMC GAS Limited | Construction | 2020 |
| DME Invest Ltd | Real estate | 2022 |
| Doggy Playdrome Ltd | Other services | 2023 |
| Doherty & Lafferty Limited | Construction | 1976 |
| Dollface Beautique Ltd | Other services | 2026 |
| Dominic Andrews Limited | Real estate | 1986 |
| Doyen Auto Services Ltd | Wholesale & retail | 2023 |
| Dram Media Ltd | Professional & scientific | 2024 |
| Drampac Limited | Other services | 1987 |
| Dream Kitchens Ltd | Construction | 2020 |
| Drumkeen Plant Hire Ltd | Construction | 2018 |
| Drybrough & Company Limited | Professional & scientific | 1895 |
| Dràm MÒR Group Ltd. | Wholesale & retail | 2013 |
| Dumbarton Car Clinic Ltd | Wholesale & retail | 2016 |
| Dumbarton Coffee & Desert Ltd | Hospitality | 2025 |
| Dumbarton Football Club 1872 Limited | Arts & recreation | 2025 |
| Dumbarton Funeral Home Limited | Other services | 2016 |
| Dumbarton Gelato Limited | Wholesale & retail | 2024 |
| Dumbarton Harp Traders Market Limited | Administrative & support | 2017 |
| Dumbarton Time and Sound Ltd | Other services | 2026 |
| Dunbritton Commercial Limited | Real estate | 2006 |
| Duncrag Ltd | Arts & recreation | 2022 |
| Duntiglennan Limited | Hospitality | 2026 |
| Durga Enterprises Ltd | Hospitality | 2024 |
| E-Tech Electrical Scotland Ltd | Construction | 2020 |
| E-Tech Response Ltd | Manufacturing | 2019 |
| East END Coachworks Limited | Wholesale & retail | 2009 |
| Eco 4 Scotland Ltd | Professional & scientific | 2025 |
| Eco Solutions Contracts Ltd | Other services | 2016 |
| Ecojars Ltd | Wholesale & retail | 2017 |
| Edana Heating Ltd | Energy | 2019 |
| Editaxis Limited | Information & communication | 2025 |
| Effintybi Ltd | Professional & scientific | 2024 |
| Eizah Trading Ltd | Hospitality | 2023 |
| Elements Hair Design Ltd | Other services | 2024 |
| Elevesc Ltd | Manufacturing | 2025 |
| Emma Frances Hair Brows and Lashes Ltd | Other services | 2026 |
| Energy Armor (UK) Ltd | Health & social care | 2011 |
| Energy-Aid Consultants Ltd | Construction | 2011 |
| Engineering Solutions & Energy Ltd | Professional & scientific | 2011 |
| Enhanced Peak Performance Ltd | Wholesale & retail | 2025 |
| Epos Scotland Ltd | Information & communication | 2017 |
| Erwsales Ltd | Wholesale & retail | 2023 |
| Ethical Promotions Limited | Professional & scientific | 1988 |
| Eunoia Studios Limited | Other services | 2026 |
| EVE Sales and Lettings Limited | Real estate | 2026 |
| Event Radio Communication Support Limited | Professional & scientific | 2017 |
| Experience Scotland's Wild Ltd | Administrative & support | 2015 |
| F & M Driving Solutions Limited | Education | 2020 |
| Famhair Ltd | Information & communication | 2024 |
| FDG Safe Site Ltd | Other services | 2025 |
| FFE Consultants Ltd | Professional & scientific | 2022 |
| Filshie Fabrications Ltd. | Manufacturing | 2009 |
| FINEKNITS4U Limited | Manufacturing | 2023 |
| Finfrey Consultants Ltd | Professional & scientific | 2020 |
| Finfrey Investments Ltd | Real estate | 2020 |
| Fiona Mackenzie Consulting Limited | Professional & scientific | 2012 |
| Firth Engineering Limited | Professional & scientific | 2018 |
| Flavius Limited | Real estate | 2000 |
| FNS Properties Limited | Real estate | 2006 |
| Forge Recycling (Scotland) Ltd | Water & waste | 2019 |
| Forget ME NOT Graveside Maintenance Ltd | Wholesale & retail | 2025 |
| Forward Strategies Limited | Financial services | 2026 |
| Furever Friend Dog Training Ltd | Education | 2025 |
| FYN Loch Consulting Ltd | Professional & scientific | 2023 |
| G & D Piping Ltd | Professional & scientific | 2018 |
| G H Architects Limited | Professional & scientific | 2023 |