| Danescourt Management (EA) Ltd | Households | 2022 |
| Daniel Andrew Construction Ltd | Construction | 2020 |
| Daniel Best Solutions Ltd | Information & communication | 2018 |
| Daniel Dodo Ltd | Administrative & support | 2025 |
| Daniel English Ltd | Professional & scientific | 2015 |
| Daniel Olusegun Ltd | Financial services | 2025 |
| Daniel Rowden Limited | Arts & recreation | 2021 |
| Daniel Ticu Logistics Limited | Transport & logistics | 2025 |
| Danin Limited | Wholesale & retail | 2026 |
| Danino Ltd | Transport & logistics | 2011 |
| Dankler LLP | | 2022 |
| Danmar Logistics Limited | Transport & logistics | 2018 |
| Danny Express Ltd | Transport & logistics | 2022 |
| Danny Liew Accountancy Ltd | Professional & scientific | 2020 |
| Danny's DIY Shed Ltd | Manufacturing | 2024 |
| DANNY88 Trans Ltd | Transport & logistics | 2021 |
| Dans Handballing Ltd | Administrative & support | 2026 |
| Dantiajet Ltd | Hospitality | 2023 |
| Daperialda Ltd | Transport & logistics | 2025 |
| Dappadon Limited | Wholesale & retail | 2022 |
| Daptech IT Services Limited | Information & communication | 2013 |
| Darcenzo Limited | Wholesale & retail | 2026 |
| Darcy Bourne Limited | Arts & recreation | 2026 |
| Darcy ERP Limited | Information & communication | 2021 |
| Darey Limited | Professional & scientific | 2021 |
| Darfil Cleaning Ltd | Administrative & support | 2018 |
| Darhyus Ryan Ltd | Construction | 2024 |
| DARIA2020 Ltd | Transport & logistics | 2023 |
| Dario Mariani Ltd | Hospitality | 2013 |
| Darius East Ltd | Transport & logistics | 2018 |
| Dark Space Explorers Ltd | Manufacturing | 2025 |
| Darklake Protocol (UK) Ltd | Administrative & support | 2025 |
| Darling BUN Shop Ltd | Manufacturing | 2025 |
| Darren Brick Properties Limited | Construction | 2015 |
| Darsham Meadows (Darsham) Management Company Limited | Households | 2021 |
| Darshna Healthcare Limited | Health & social care | 2026 |
| Darsi Quality Fixing Ltd | Construction | 2023 |
| Darukh Ltd | Wholesale & retail | 2025 |
| Daruma Street Food Limited | Hospitality | 2025 |
| DAS Blue Limited | Wholesale & retail | 2018 |
| DAS Suffolk Limited | Professional & scientific | 2019 |
| Dashing DES Limited | Arts & recreation | 2017 |
| Dashviro Usage Views Ltd | Information & communication | 2026 |
| Data Environment Services Ltd | Information & communication | 2022 |
| Data& Limited | Information & communication | 2020 |
| Database Synergy Limited | Information & communication | 1996 |
| Datapro Consultancy Limited | Information & communication | 2014 |
| Dataverse Consulting Ltd | Information & communication | 2024 |
| Datawright Solutions Ltd | Information & communication | 2025 |
| Datelora Consistency Works Ltd | Information & communication | 2026 |
| Datology Limited | Information & communication | 2023 |
| Davco International Ltd | Real estate | 2020 |
| Davd & SON Limited | Transport & logistics | 2017 |
| Dave Chapman Ltd | Wholesale & retail | 2015 |
| Dave Langdon Plumbing & Heating Ltd | Manufacturing | 2012 |
| Dave ROW Electrical Ltd | Construction | 2015 |
| Davhym Ltd | Transport & logistics | 2021 |
| David Booth Finance Ltd | Financial services | 2016 |
| David Button Funeral Directors Limited | Other services | 2022 |
| David CLN Ltd | Administrative & support | 2024 |
| David Cristian Limited | Transport & logistics | 2018 |
| David Ford QA Limited | Professional & scientific | 2003 |
| David Hopps Associates Limited | Professional & scientific | 2006 |
| David International Limited | Transport & logistics | 2020 |
| David L COX Ltd | Construction | 2010 |
| David LC Limited | Transport & logistics | 2025 |
| David Mcgregor Ltd | Wholesale & retail | 2011 |
| David Mortimer Surveys Ltd | Professional & scientific | 2022 |
| David Oliver Media Ltd | Information & communication | 2007 |
| David Shapiro & Co. Limited | Real estate | 1981 |
| David Verney Limited | Extraterritorial | 2003 |
| Davidbaldockbroadcast Ltd | Information & communication | 2025 |
| Davidfast Ltd | Transport & logistics | 2021 |
| Davie Apps Ltd | Information & communication | 2017 |
| Davies Plumbing & Heating Limited | Construction | 2008 |
| DAVNIK09 Ltd | Transport & logistics | 2018 |
| Dawn Services Cleaning Ltd | Administrative & support | 2024 |
| Dawn Services Ltd | Real estate | 2009 |
| Dawnfresh Seafoods Ltd. | Manufacturing | 2026 |
| Day and Night Properties Limited | Real estate | 2024 |
| Daybreak Growth Limited | Professional & scientific | 2025 |
| Dayle Bayliss Limited | Construction | 2013 |
| Daytona Comps Ltd | Arts & recreation | 2026 |
| DB18 Sports Consultancy Ltd | Education | 2024 |
| DBA Building Contractors Limited | Construction | 2015 |
| Dbme Corals Ltd | Agriculture & fishing | 2026 |
| Dbno IT Professional Services Limited | Information & communication | 2014 |
| DBS at CAS Ltd | Administrative & support | 1994 |
| DBS Imports Limited | Wholesale & retail | 2024 |
| DC Electrical Consulting Ltd | Professional & scientific | 2025 |
| DC Freight Consultancy Ltd | Transport & logistics | 2026 |
| DC Home Solutions Ltd | Construction | 2026 |
| DC Ipswich Ltd | Hospitality | 2025 |
| DC Tree Services Ltd | Agriculture & fishing | 2019 |
| DCB Enterprises Limited | Information & communication | 2008 |
| DCB Transport Ltd | Transport & logistics | 2019 |
| DCL Carpentry Ltd | Construction | 2015 |
| DCP Assist Ltd | Wholesale & retail | 2020 |
| DCP Rentals Ltd | Real estate | 2025 |
| DCS Ecology Ltd | Professional & scientific | 2020 |