| DNS Build Solutions Limited | Construction | 2017 |
| DNS Construction Ltd | Construction | 2019 |
| DNT Estates Ltd | Real estate | 2025 |
| DOB Plastering Services Ltd | Construction | 2025 |
| Dobi Cleaning Ltd | Administrative & support | 2022 |
| Doci Ltd | Hospitality | 2022 |
| Doctineer Limited | Professional & scientific | 2024 |
| Doctor Ijete's Restaurant Ltd | Hospitality | 2024 |
| Doctorpro Limited | Information & communication | 2025 |
| Doctors Consults Limited | Health & social care | 2023 |
| Dodi Kale Limited | Construction | 2019 |
| Dogan Accountancy Ltd | Professional & scientific | 2016 |
| Dogan Brothers Limited | Hospitality | 2022 |
| Dogan Property Investments Limited | Real estate | 2022 |
| Dogan Timbercraft Ltd | Construction | 2025 |
| Dogs of Anglesey Limited | Financial services | 2026 |
| Dogsplash&Play Ltd | Agriculture & fishing | 2025 |
| Dogus Investment Ltd | Real estate | 2018 |
| Dokuzi Construction Ltd | Construction | 2025 |
| Dolphin Movers Limited | Transport & logistics | 1997 |
| Domdom London Ltd | Wholesale & retail | 2022 |
| Domi Cleaning Services Ltd | Administrative & support | 2024 |
| Domino Investments Holdings Limited | Financial services | 2020 |
| Domino Investments Limited | Financial services | 1993 |
| Done Construction Services Ltd | Construction | 2021 |
| Doni Construction Ltd | Construction | 2022 |
| Donny Smash Doncaster Limited | Hospitality | 2024 |
| Donny.Currens Ltd | Construction | 2021 |
| Dont Tell the Donkey Limited | Information & communication | 2025 |
| Doors for House Ltd | Construction | 2026 |
| Dope Bunz Ltd | Hospitality | 2025 |
| Dorstocker (Bexleyheath) Ltd | Other services | 2023 |
| Dorstocker Tattoos Ltd | Other services | 2021 |
| Doruk Ltd | Construction | 2020 |
| Doruk Supermarket Limited | Wholesale & retail | 2018 |
| Dotech Properties Ltd | Real estate | 2025 |
| Dottmannbricks Ltd. | Wholesale & retail | 2025 |
| Doublet Cars Ltd | Wholesale & retail | 2024 |
| Down to Earth Spaces Limited | Construction | 2017 |
| DP Electrical London Ltd | Construction | 2021 |
| DP Manhattan Nails Ltd | Other services | 2026 |
| DP Optimal Care Ltd | Health & social care | 2020 |
| DP Plumbing & Heating Team Limited | Construction | 2012 |
| DPG Electrical Services Ltd | Administrative & support | 2015 |
| DPP Projects Ltd | Construction | 2014 |
| Dprd Consultancy Ltd | Professional & scientific | 2025 |
| DPS Executive Cars Limited | Administrative & support | 2020 |
| DR Clinical Co Ltd | Health & social care | 2022 |
| DR Dogan Clinic Ltd | Health & social care | 2024 |
| DR Gobi Ltd | Health & social care | 2021 |
| DR Henry Vacuum Ltd | Other services | 2021 |
| DR Lorraine Kelly Consultancy Limited | Professional & scientific | 2025 |
| DR Master Craft Ltd | Construction | 2024 |
| DR N.K.Wijayasundara Ltd | Health & social care | 2013 |
| DR Refurbishments and Developments Ltd | Construction | 2020 |
| DR. Cover Medical Services Ltd | Health & social care | 2015 |
| DR. Ozlem's Clinic Limited | Health & social care | 2025 |
| DR. R J Benson Limited | Health & social care | 2012 |
| DRA Property Limited | Real estate | 2019 |
| Drainflow Specialists Ltd | Administrative & support | 2025 |
| Drakestreet Freehold Company Limited | Real estate | 1994 |
| Drakon Systems Ltd | Information & communication | 2025 |
| Draox Ltd | Wholesale & retail | 2022 |
| Drask Ltd | Professional & scientific | 2017 |
| Drassanes Ltd | Information & communication | 2012 |
| Draws Property and Construction Services Ltd. | Real estate | 2025 |
| Dray Decorators Limited | Construction | 2010 |
| Drayton Road Transport & Logistics Ltd | Transport & logistics | 2026 |
| Drayton Wood Cars Ltd | Transport & logistics | 2020 |
| Drde Consult Ltd | Administrative & support | 2025 |
| Dream 100 Property Investment Ltd | Financial services | 2023 |
| Dreambrides Ltd | Extraterritorial | 2021 |
| Dreampower Limited | Administrative & support | 2017 |
| Drejan Ltd | Financial services | 2025 |
| Dresh Ltd | Wholesale & retail | 2025 |
| Drex & Co Accountants Ltd | Professional & scientific | 2019 |
| Drex Aviation Group Limited | Wholesale & retail | 2024 |
| Drex Estate Ltd | Real estate | 2026 |
| DRG Carpentry and Maintenance Ltd | Construction | 2023 |
| Driftwood Apartments Limited | Administrative & support | 2009 |
| Driftwood Services Ltd | Financial services | 2019 |
| Drill Hall Sports Club (Enfield) Limited | Arts & recreation | 1997 |
| Drink Inns Limited | Hospitality | 2000 |
| Drink Well 02 Ltd | Hospitality | 2021 |
| Drinking Bird Films Ltd | Information & communication | 2013 |
| Driven Tutors Limited | Education | 2021 |
| Driver Demand UK Ltd | Administrative & support | 2025 |
| Dropa Limited | Wholesale & retail | 2025 |
| Drugsline Education Ltd | Education | 2022 |
| DRY Clean Tailoring Services Limited | Other services | 2023 |
| Drydock Autos Limited | Wholesale & retail | 2016 |
| Drylining Group Ltd | Construction | 2024 |
| DS & Shayne Property Limited | Real estate | 2025 |
| DS Ergonomics Limited | Wholesale & retail | 2007 |
| DS Global UK Limited | Wholesale & retail | 2018 |
| DS Kamica Ltd | Construction | 2026 |
| DS Logistic Solutions Limited | Transport & logistics | 2026 |
| DS Pro Ltd | Information & communication | 2023 |
| DS SAI Ltd | Other services | 2017 |
| DS UK Consulting Ltd | Professional & scientific | 2024 |