| Devs Constructions Ltd | Construction | 2019 |
| DEW Point Limited | Wholesale & retail | 2014 |
| DEW Property Ltd | Real estate | 2023 |
| Dexter Morgan Ltd | Transport & logistics | 2018 |
| DG Properties Development Ltd | Construction | 2024 |
| DG Transporter Ltd | Transport & logistics | 2025 |
| DG Trucking Ltd | Transport & logistics | 2024 |
| DGD Construction Ltd | Construction | 2017 |
| DH Enterprises Ltd | Wholesale & retail | 2013 |
| Dhagaweele Transport Ltd | Transport & logistics | 2026 |
| Dhagroup Ltd | Transport & logistics | 2025 |
| Dhal Food & Wine Limited | Wholesale & retail | 2012 |
| Dhaliwal Construction Services Ltd | Construction | 2025 |
| Dhaliwal Design & Build Services Limited | Construction | 2026 |
| Dhaliwal Design and Build Limited | Construction | 2020 |
| Dhaliwal Investments & Estates Ltd | Real estate | 2026 |
| Dhaliwal Property Developers Ltd | Construction | 2024 |
| Dhaliwall Ltd | Transport & logistics | 2025 |
| Dhall Brothers (UK) Ltd | Wholesale & retail | 2017 |
| Dham Glazing Limited | Construction | 2025 |
| Dhan Dhan Baba Deep Singh JI Ltd | Transport & logistics | 2026 |
| Dhandho Ltd | Other services | 2025 |
| Dhanjal Eyecare Ltd | Other services | 2017 |
| Dhanjal Investment Group Ltd | Real estate | 2023 |
| Dhanju Brothers Ltd | Real estate | 2025 |
| Dhanju Scaffolding Ltd | Construction | 2026 |
| Dharam Property Investments 2 Limited | Real estate | 2023 |
| Dharam Property Investments Ltd | Real estate | 2018 |
| Dharma Construction Services Limited | Construction | 2025 |
| Dharma Logistics Ltd | Transport & logistics | 2026 |
| Dhawan’S Build & Tech Solutions Ltd | Construction | 2026 |
| Dhillion Construction Ltd | Construction | 2017 |
| Dhillon Builds Ltd | Construction | 2021 |
| Dhillon Carpet and Flooring (London) Ltd | Construction | 2026 |
| Dhillon Construction & Haulage Ltd | Construction | 2025 |
| Dhillon Readymix Concrete Ltd | Manufacturing | 2025 |
| Dhillons Construction Limited | Construction | 2025 |
| Dhillons Hayes Ltd | Wholesale & retail | 2017 |
| Dhillonz Transport Ltd | Transport & logistics | 2026 |
| Dhiman Estates Ltd | Real estate | 2024 |
| Dhir Ltd | Real estate | 2018 |
| DHL Global Match (UK) Limited | Transport & logistics | 1987 |
| Dhot Corporation Ltd | Construction | 2025 |
| Dhot Design & Build Ltd | Construction | 2025 |
| DHS Investments Limited | Real estate | 2010 |
| Dhun Roofing and Building Ltd | Construction | 2025 |
| DI & Maks Enterprise Limited | Construction | 2019 |
| DIAL2DEAL Ltd | Wholesale & retail | 2026 |
| Diamond Collection Ltd | Wholesale & retail | 2023 |
| Diamond Decoration Ltd | Wholesale & retail | 2024 |
| Diamond Group Private Limited | Real estate | 2019 |
| Diamond Joineries Ltd | Construction | 2019 |
| Diamond Property W7 Ltd | Real estate | 2023 |
| Diamond Roofing & Build Ltd | Construction | 2017 |
| Diamond Virk Construction Limited | Construction | 2025 |
| Diaries of Reena Ltd | Information & communication | 2022 |
| DIAS21 Limited | Health & social care | 2023 |
| Diasporic and Creative Enterprises Limited | Professional & scientific | 2025 |
| Digale Chemservices Ltd | Wholesale & retail | 2012 |
| Digi Smash UK Ltd | Other services | 2023 |
| Digilogies Ltd | Wholesale & retail | 2025 |
| Digital AA Ltd | Wholesale & retail | 2024 |
| Digital Developers Ltd | Information & communication | 2018 |
| Digital Glazing Limited | Construction | 2002 |
| Digital Kinematics Ltd | Manufacturing | 2015 |
| Digital Market Limited | Wholesale & retail | 2025 |
| Digital Mart Consulting Ltd | Wholesale & retail | 2025 |
| Digital Quality Services Ltd | Information & communication | 2025 |
| Digitech Group Ltd | Information & communication | 2016 |
| Digitech Plus Limited | Construction | 2015 |
| Diligent Global Services Ltd | Construction | 2025 |
| Diljit Singh UK Construction Limited | Construction | 2023 |
| Dillon Homes Ltd | Real estate | 2016 |
| Dilnoor Food and Wine Ltd | Wholesale & retail | 2025 |
| Dimple Bedrooms Limited | Manufacturing | 2020 |
| Dimple Services (UK) Ltd | Manufacturing | 2007 |
| Dimple Services Limited | Manufacturing | 1991 |
| Dimple's Beauty Bar Ltd | Other services | 2018 |
| Dimple's Unisex Salon Ltd | Other services | 2024 |
| Dimpy Creations Limited | Wholesale & retail | 2012 |
| Dinovation Ltd | Hospitality | 2011 |
| DIP Drop Limited | Other services | 2019 |
| Dipenkumar Ltd | Construction | 2024 |
| Direct Dash Ltd | Transport & logistics | 2024 |
| Direct Link Worldwide Limited | Transport & logistics | 1994 |
| Direct Marble Ltd | Construction | 2019 |
| Directions Recruitment Specialists Limited | Administrative & support | 1998 |
| Disability Advice and Support Hillingdon | Other services | 2001 |
| Dispatch Logistics Limited | Wholesale & retail | 2022 |
| Distribution Logistics Limited | Transport & logistics | 2020 |
| District Bakery Management Limited | Households | 2017 |
| Divan & Kids Ltd | Real estate | 2025 |
| Divan Care Limited | Health & social care | 2019 |
| Divan Private Hires Limited | Transport & logistics | 2021 |
| Divan Properties Ltd | Real estate | 2022 |
| Divan Sahab Ltd. | Wholesale & retail | 2013 |
| Divergo Limited | Health & social care | 2022 |
| Diverse Store Ltd | Wholesale & retail | 2023 |
| Divine Evolution Ltd | Administrative & support | 2022 |
| Divine Flames Limited | Manufacturing | 2025 |