| DKM Energy Consulting Ltd | Professional & scientific | 2024 |
| DKM Project Services Limited | Professional & scientific | 2007 |
| DKM90 Utilities Limited | Construction | 2023 |
| Dkt.Hse Ltd | Professional & scientific | 2018 |
| Dkvk (Aberdeen) Ltd | Wholesale & retail | 2026 |
| DL Plumbing & Heating Services Ltd | Construction | 2026 |
| DL Tech Services Ltd | Construction | 2025 |
| DLC Rigging Ltd | Construction | 2025 |
| Dlorah Homes Ltd | Construction | 2020 |
| Dlugosz Sales Co. Ltd | Wholesale & retail | 2024 |
| DM Decorating and Services Limited | Construction | 2025 |
| DM Project Solutions (Scotland) Ltd. | Other services | 2018 |
| DM Smith Consultants Limited | Mining & quarrying | 2024 |
| DM Supply Chain Ltd | Professional & scientific | 2013 |
| Dmac Property Aberdeen Ltd | Real estate | 2025 |
| DMC Interventional and Diagnostic Radiology Ltd | Health & social care | 2025 |
| DMC Supplies Ltd | Wholesale & retail | 2015 |
| DMC Timepieces Ltd | Wholesale & retail | 2023 |
| Dmca Consulting Ltd | Professional & scientific | 2026 |
| DMD (2000) Limited | Manufacturing | 2000 |
| DMD Technical Ltd | Professional & scientific | 2022 |
| Dmel Ltd | Professional & scientific | 2019 |
| DMF Engineering Machining Ltd | Mining & quarrying | 2019 |
| Dmgt Property Ltd | Real estate | 2024 |
| DMK Access Limited | Administrative & support | 2017 |
| DMK Plumbing (WE Cover Boilers) Ltd | Construction | 2022 |
| Dmkm Limited | Professional & scientific | 2008 |
| DMM Operations Ltd | Professional & scientific | 2025 |
| DMT Engineering Consulting Ltd | Professional & scientific | 2017 |
| DMT Marketing Limited | Information & communication | 2025 |
| DMV Solutions Ltd | Information & communication | 2019 |
| DN Rigging & Lifting Ltd | Energy | 2024 |
| DN Sports Coaching Ltd | Education | 2021 |
| DN Tennis Camps Ltd | Education | 2021 |
| DNA Cleaning Services Ltd | Administrative & support | 2021 |
| DNA Foods Ltd | Agriculture & fishing | 2025 |
| DNB Trading Limited | Other services | 2023 |
| DNK Holdings Group Ltd | Hospitality | 2024 |
| DNO Exploration UK Limited | Mining & quarrying | 2014 |
| Dnow UK Limited | Manufacturing | 2012 |
| Docright Ltd | Information & communication | 2025 |
| Docuflex Group Ltd | Administrative & support | 2026 |
| Document Control Specialists Limited | Administrative & support | 2011 |
| Dodcass Limited | Other services | 2013 |
| Dodgy Gardener Ecommerce Ltd | Wholesale & retail | 2026 |
| DOF (UK) Limited | Transport & logistics | 1999 |
| DOF Subsea UK Limited | Administrative & support | 1999 |
| Dog ZEN LLP | | 2020 |
| Doganay Homes Limited | Real estate | 2026 |
| Dogwood Pack Ltd | Information & communication | 2021 |
| Doir Ecological Surveyance Limited | Professional & scientific | 2020 |
| Dolbar Engineering Ltd | Professional & scientific | 2014 |
| Dollshouse Hair & Beauty Ltd | Other services | 2025 |
| Dolluxe Ltd | Other services | 2026 |
| Dolores' Lutong Bahay Ltd | Hospitality | 2024 |
| Dolphin Energy Limited | Professional & scientific | 1998 |
| Dolphin Express Limited | Hospitality | 2018 |
| DOM Engineering Ltd | Professional & scientific | 2020 |
| Domilia Ltd | Wholesale & retail | 2025 |
| Dominion Engineering Ltd | Professional & scientific | 2018 |
| Domtransport Ltd | Transport & logistics | 2022 |
| DON & DEE Properties Ltd | Real estate | 2021 |
| DON Developments Limited | Construction | 2004 |
| DON Electrical Services Limited | Manufacturing | 2000 |
| DON Energy Services Limited | Professional & scientific | 2015 |
| DON Fishing Company (Fraserburgh) Limited (the) | Professional & scientific | 1985 |
| DON Fishing Company (Peterhead) Ltd. (the) | Professional & scientific | 1962 |
| DON TAR Ltd | Professional & scientific | 2021 |
| DON Valley Seeds Limited | Wholesale & retail | 2010 |
| DON Van Meat Limited | Agriculture & fishing | 2025 |
| Donald Farms Limited | Agriculture & fishing | 1997 |
| Donald Nicol (Farriers) Limited | Agriculture & fishing | 2003 |
| Done by Tomek Ltd | Construction | 2023 |
| Dongem Supplies Limited | Other services | 1985 |
| Donny Joinery Ltd | Construction | 2025 |
| Donrig Limited | Professional & scientific | 2013 |
| Donside Joinery Solutions Ltd | Construction | 2019 |
| Donside Ltd | Real estate | 2024 |
| Donview Construction Ltd. | Construction | 1999 |
| Donview Nursery Limited | Real estate | 2010 |
| Don’T GET Lost Ltd | Information & communication | 2025 |
| DOO DOO Duty Ltd | Water & waste | 2024 |
| Doooeee Bandit Limited | Professional & scientific | 2018 |
| Doric Design LLP | | 2019 |
| Doric Home Improvements Ltd | Construction | 2019 |
| Doric PUB Company Limited | Hospitality | 2012 |
| Doric Web Deliveries Ltd | Transport & logistics | 2020 |
| Dormantco Limited | Extraterritorial | 2013 |
| Dotpro Ltd | Professional & scientific | 2010 |
| Double Impressions Limited | Other services | 2010 |
| Double NIP Co Limited | Professional & scientific | 2019 |
| Dough and Co Scotland Ltd | Wholesale & retail | 2023 |
| Dough Bros 1 Ltd | Hospitality | 2026 |
| Douglas Holdings Limited | Other services | 1992 |
| Douglas West Extension Ltd | Energy | 2018 |
| DOW Property Ltd | Real estate | 2024 |
| Downie Project Solutions Ltd | Professional & scientific | 2025 |
| Downing Imaging Limited | Information & communication | 2018 |
| Downtown Tattoo Co. Ltd | Arts & recreation | 2023 |
| Dozstellink Limited | Administrative & support | 2024 |