| Decor Bros Ltd | Construction | 2025 |
| Dedicate Ltd | Manufacturing | 2025 |
| Deem Advisory Services Limited | Other services | 2015 |
| Deem Farm Holdings Limited | Agriculture & fishing | 2020 |
| Deem Property Agents Limited | Real estate | 2015 |
| Deem Type Jaguar Ltd | Wholesale & retail | 2020 |
| Deepsea Shipping Solutions Ltd | Administrative & support | 2014 |
| Default Electrical Ltd | Construction | 2025 |
| Degirmenci Investment Co Limited | Real estate | 2023 |
| Delaney Worner International Ltd | Information & communication | 2016 |
| Delchi Capital Ltd | Financial services | 2022 |
| Delicious Snacks Ltd | Hospitality | 2022 |
| Dell Mondray Limited | Wholesale & retail | 2026 |
| Delled UK Ltd | Wholesale & retail | 2016 |
| Delta Accountancy Services Limited | Professional & scientific | 2019 |
| Delta Property Solutions Limited | Other services | 2013 |
| Deltalet Estates Limited | Real estate | 2025 |
| Delu & Co Ltd | Construction | 2018 |
| Dema Plumbing & Heating Limited | Construction | 2024 |
| Demi's Haven Limited | Health & social care | 2024 |
| Demo Rail Ltd | Construction | 2018 |
| DEN & Sibs Ltd | Information & communication | 2018 |
| Denaco Limited | Wholesale & retail | 2023 |
| Denfos Services Ltd | Other services | 2018 |
| Deniz Kaya Ltd | Information & communication | 2021 |
| Deniz Logistics Limited | Transport & logistics | 2008 |
| Denmar Distributing & Services Limited | Transport & logistics | 2014 |
| Dennis Fire Service Ltd | Public administration | 2024 |
| Denoo Limited | Wholesale & retail | 2020 |
| Dents/Dental Excellence (Technologies) Limited | Administrative & support | 2000 |
| Denval SPV Property Ltd | Real estate | 2024 |
| Derivative Flow Consulting Ltd | Professional & scientific | 2026 |
| Dermal Solutions UK Ltd | Wholesale & retail | 2026 |
| Derman Health Ltd | Wholesale & retail | 2019 |
| Desa Builders Ltd | Construction | 2023 |
| Design and Style Interiors Limited | Professional & scientific | 2003 |
| Design-Cubed Limited | Professional & scientific | 2011 |
| Designs & Build Ltd | Real estate | 2019 |
| Desire AC Caring Service Limited | Health & social care | 2023 |
| Desk Brains Ltd | Administrative & support | 2022 |
| Development Group International Limited | Professional & scientific | 2009 |
| Development Trade Limited | Wholesale & retail | 2024 |
| Deville Holdings Ltd | Financial services | 2025 |
| Devoted Care Agency Ltd | Health & social care | 2018 |
| Dewa Entertainment Limited | Arts & recreation | 2013 |
| Dewpoint Damp Diagnostics Ltd | Professional & scientific | 2026 |
| Dextronics Ltd | Wholesale & retail | 2019 |
| Deymade Ltd | Construction | 2022 |
| DFA (Grey) Limited | Professional & scientific | 2021 |
| DGB Commerce Ltd | Wholesale & retail | 2025 |
| DGC Management Consultancy Limited | Information & communication | 2025 |
| Dgfp UK Holdings Ltd | Financial services | 2021 |
| DGS Floors Ltd | Construction | 2026 |
| DHR Social Work Service Ltd | Administrative & support | 2023 |
| DI Paola Commercial Properties Limited | Real estate | 2024 |
| DIA Hubs Ltd | Wholesale & retail | 2019 |
| Diamas (UK) Limited | Manufacturing | 2013 |
| Diana Physiotherapy Limited | Health & social care | 2017 |
| Digital Dash SMM Ltd | Information & communication | 2023 |
| Digital Finishing Solutions Limited | Manufacturing | 2022 |
| Digital Media & Consulting Limited | Professional & scientific | 2023 |
| Digital World Solutions Limited | Information & communication | 2011 |
| Digital World Systems Limited | Information & communication | 2008 |
| Dimas Building Ltd | Construction | 2018 |
| Dinu Joinery Ltd | Manufacturing | 2020 |
| Dipthis Dipthat Edition Ltd | Wholesale & retail | 2025 |
| Direct Accountants (UK) Limited | Professional & scientific | 2014 |
| Direct Decor Limited | Professional & scientific | 2001 |
| Direct Electrical Contractors (London) Ltd | Construction | 2000 |
| Direct FIX Limited | Manufacturing | 2017 |
| Direct Line Cars Limited | Other services | 2010 |
| Dirumo Ltd | Health & social care | 2012 |
| Distribution Depot Limited | Wholesale & retail | 2022 |
| District Studio Ltd | Real estate | 2025 |
| Diva Estates Limited | Real estate | 2007 |
| DIY4U Limited | Construction | 2002 |
| Djmantzevents Limited | Other services | 2024 |
| DJS Lettings Limited | Real estate | 2023 |
| DK & B Limited | Real estate | 2020 |
| Dlmd Consultancy Ltd | Information & communication | 2015 |
| DMF Maintenance Ltd | Construction | 2024 |
| DMR Housing Limited | Real estate | 2025 |
| Dnbl Investment Ltd | Real estate | 2022 |
| DND B.S. Limited | Construction | 2019 |
| Dnflet Limited | Real estate | 2021 |
| DO Watt Electrical Limited | Construction | 2022 |
| DOE and Hope Ltd | Wholesale & retail | 2009 |
| Doga Paper Ltd | Manufacturing | 2018 |
| Dokgroup Ltd | Real estate | 2026 |
| Dologistics Ltd | Transport & logistics | 2025 |
| Dominus Perfecta Ltd | Construction | 2025 |
| DON Pome Limited | Wholesale & retail | 2025 |
| DON Spumone Ltd | Manufacturing | 2025 |
| Donovans Diggers & Forklifts Limited | Wholesale & retail | 2023 |
| Dontel Group Limited | Construction | 2005 |
| Dontel Holdings Limited | Financial services | 2017 |
| Dontel One Limited | Professional & scientific | 2005 |
| Dontel Two Limited | Professional & scientific | 2005 |
| Doodled Inc Limited | Information & communication | 2018 |
| Doris DOT Limited | Health & social care | 2025 |