| Development Insight Limited | Real estate | 2020 |
| Devicta Ltd | Other services | 2020 |
| Devine & Co Partners Limited | Financial services | 2014 |
| Devitalandr Ltd | Wholesale & retail | 2023 |
| Devon Property Investments Limited | Real estate | 2003 |
| Devonport's Kitchens and Bathrooms Limited | Wholesale & retail | 2009 |
| Dewacre Limited | Real estate | 2009 |
| Deward Installations Limited | Construction | 2014 |
| Dewson Ltd | Administrative & support | 2023 |
| Dexate Academy England Limited | Professional & scientific | 2024 |
| Dexate Limited | Information & communication | 2024 |
| Dexlab Consulting Limited | Information & communication | 2026 |
| Dexsnacks Limited | Wholesale & retail | 2023 |
| Dexter LEE Holdings Ltd | Health & social care | 2021 |
| Deyick Ventures Ltd | Wholesale & retail | 2026 |
| DFC Distributions Ltd | Wholesale & retail | 2021 |
| DFC Holdings Ltd | Arts & recreation | 2023 |
| DFD Couriers Ltd | Transport & logistics | 2019 |
| DFD Logistics Ltd | Transport & logistics | 2023 |
| DFM MOX Limited | Other services | 2020 |
| DFX Logistics Limited | Transport & logistics | 2020 |
| DG Assist Ltd | Transport & logistics | 2024 |
| DG Electronics Limited | Wholesale & retail | 2018 |
| DG Installation Roofline Solutions Ltd | Construction | 2021 |
| DG Tarnsport Ltd | Transport & logistics | 2019 |
| DG Vans Ltd | Wholesale & retail | 2017 |
| DGI Smart Solutions Ltd | Transport & logistics | 2014 |
| DGK Driving Sollution Ltd | Transport & logistics | 2026 |
| Dgrm Trans Ltd | Transport & logistics | 2022 |
| DGS Books Ltd | Professional & scientific | 2025 |
| DGS Developments Limited | Construction | 2025 |
| DGS Flipping Ltd | Wholesale & retail | 2024 |
| DGS Lime Plastering and Rendering Ltd | Construction | 2019 |
| DH Estates Ltd | Real estate | 2025 |
| Dhammatek Limited | Wholesale & retail | 2015 |
| Dhanraj Limited | Information & communication | 2019 |
| Dhanushan and Sons Ltd | Health & social care | 2025 |
| DHC Accountants Limited | Professional & scientific | 2005 |
| DHP Assets Limited | Real estate | 2017 |
| Dhra Capital Limited | Real estate | 2021 |
| DI Turkish Kitchen Ltd | Hospitality | 2026 |
| DIA by Laser LAB Ltd | Other services | 2021 |
| Diag&Scope Ltd | Manufacturing | 2024 |
| Dial Peterborough | Health & social care | 2001 |
| Diamant HL Ltd | Hospitality | 2026 |
| Diamant Property Holding Ltd | Hospitality | 2019 |
| Diamant Property Managment Ltd | Real estate | 2018 |
| Diames Ltd | Wholesale & retail | 2025 |
| Diamond ARK Capital Limited | Financial services | 2025 |
| Diamond District Homes Ltd | Real estate | 2024 |
| Diamond Mini Market Ltd | Wholesale & retail | 2025 |
| Diamond Scissors Barbers Ltd | Other services | 2024 |
| Diamond Technology Ltd | Information & communication | 2011 |
| Diamond Touch Park Road Ltd | Other services | 2024 |
| Diamond Wealth Ltd | Administrative & support | 2024 |
| Diamonds Home Ltd | Administrative & support | 2021 |
| Diana Urbonaviciute Ltd | Health & social care | 2022 |
| Dianor Transport Ltd | Transport & logistics | 2022 |
| Didilawren Group Ltd | Information & communication | 2023 |
| Didong's Brothers Limited | Health & social care | 2020 |
| Diesel City INK Limited | Other services | 2018 |
| Dieuxenfants Ltd | Wholesale & retail | 2022 |
| Diffusione Culturale Limited | Extraterritorial | 2023 |
| Digesting London Limited | Professional & scientific | 2024 |
| Digger and Bowser Services Limited | Construction | 2023 |
| Digident Solutions Limited | Information & communication | 2023 |
| Digilux Ltd | Administrative & support | 2024 |
| Digital Academy of Dental Sciences Ltd | Education | 2022 |
| Digital Darts Pro Limited | Information & communication | 2022 |
| Digital Dental Atelier Ltd | Manufacturing | 2024 |
| Digital People in Peterborough CIC | Information & communication | 2016 |
| Digital Print Ltd | Information & communication | 1988 |
| Digital Slam Ltd | Professional & scientific | 2025 |
| Digital Vibes Limited | Wholesale & retail | 2026 |
| Digitalbox PLC | Professional & scientific | 2002 |
| Digitalbox Publishing (Holdings) Limited | Financial services | 2017 |
| Digitalbox Publishing Limited | Information & communication | 2015 |
| Digitaldefenseexperts Ltd | Information & communication | 2025 |
| Digitice Ltd | Information & communication | 2024 |
| Digitize-Nexus Ltd | Construction | 2026 |
| Digitree Software Ltd | Information & communication | 2017 |
| Digix Systems Ltd | Administrative & support | 2024 |
| Dignitas Care Services Limited | Health & social care | 2024 |
| Dika Ltd | Construction | 2019 |
| Diligent Cleaning Limited | Administrative & support | 2015 |
| Diligent Homes Limited | Real estate | 2024 |
| Dimbez Transport Ltd | Transport & logistics | 2025 |
| Dimo FS Contractors Ltd | Construction | 2025 |
| Dimple Distribution Limited | Wholesale & retail | 2026 |
| Dimuken (G.B.) Limited | Manufacturing | 1986 |
| DIN Automotive Ltd | Wholesale & retail | 2022 |
| DIN Property and Co Ltd | Real estate | 2023 |
| Ding Dong Dealers Ltd | Construction | 2019 |
| Dinkerrai Capital Limited | Financial services | 2026 |
| Dinkerrai Housing Ltd | Real estate | 2026 |
| Dinkerraihomes Ltd | Real estate | 2025 |
| Dinks Auto Body Repairs Limited | Wholesale & retail | 2016 |
| Dino and Bear Ltd | Information & communication | 2026 |
| Dinu Torres Ltd | Construction | 2019 |
| Diny Holdings Ltd | Financial services | 2024 |