| Csyj Ltd | Real estate | 2026 |
| Curated Living Limited | Wholesale & retail | 2014 |
| Curiously Branded Ltd | Wholesale & retail | 2021 |
| Curran Associates Limited | Professional & scientific | 2025 |
| Curzon Landscape Ltd | Professional & scientific | 2007 |
| Cutting Edge Garden Maintenance Limited | Administrative & support | 2011 |
| Cyc:D Ltd | Arts & recreation | 2016 |
| D & a Hair Design Ltd | Other services | 2007 |
| D J Griffin Limited | Wholesale & retail | 2002 |
| D&P Associates Ltd | Construction | 2026 |
| D&W Joinery Ltd | Construction | 2026 |
| D.T. Trussler Building Contractors Ltd | Construction | 2016 |
| D3TEX Limited | Professional & scientific | 2007 |
| DAE Safety Limited | Public administration | 2026 |
| Daon Health Ltd | Health & social care | 2024 |
| Darron Wickham Limited | Construction | 2025 |
| Datachange Ltd | Professional & scientific | 2020 |
| Davanti Investments Limited | Information & communication | 2016 |
| Davanti Ltd | Professional & scientific | 2021 |
| David O'Brien Landscape Architecture Limited | Professional & scientific | 2012 |
| Davidjensenphotography Ltd | Professional & scientific | 2014 |
| Daynes and Co Limited | Professional & scientific | 2011 |
| DDY Motion Studio Ltd | Professional & scientific | 2018 |
| Decantry Limited | Wholesale & retail | 2018 |
| Decoding Business Limited | Professional & scientific | 2020 |
| Deeks & Steere (Holdings) Limited | Construction | 1946 |
| DEL Pueblo Ltd | Wholesale & retail | 2025 |
| Delforge Management Consultancy Limited | Professional & scientific | 2018 |
| Design Daisy Limited | Information & communication | 2010 |
| Design Guru London Ltd | Professional & scientific | 2023 |
| Design Unity Limited | Professional & scientific | 2013 |
| Detective Limited | Administrative & support | 1993 |
| Devamount Limited | Real estate | 1978 |
| Deviniti Ltd | Wholesale & retail | 2020 |
| DF Outsourcing Ltd | Wholesale & retail | 2023 |
| DG Insight Limited | Information & communication | 2002 |
| DG541 Ltd | Professional & scientific | 2020 |
| DHW Digital Consultancy Ltd | Professional & scientific | 2025 |
| Dial Post UK Limited | Professional & scientific | 2024 |
| Diamond View Window Cleaners Limited | Administrative & support | 2014 |
| Digital Heights Limited | Construction | 2015 |
| DILLI24 Ltd | Hospitality | 2022 |
| Dimmi Limited | Extraterritorial | 2011 |
| Direct Drainage Solutions Ltd | Construction | 2019 |
| Discover Startups Ltd | Information & communication | 2025 |
| DMF Plumbing and Heating Limited | Construction | 2012 |
| DNA Piano Ltd | Information & communication | 2015 |
| Document Scanning Centre Limited | Extraterritorial | 2010 |
| Dolce Properties Limited | Real estate | 2004 |
| Dolmetsch Foundation(Incorporated)The | Other services | 1928 |
| Doma (MK) Ltd | Arts & recreation | 2025 |
| Domestic Funk Products Limited | Education | 1996 |
| Don’T Wear IT? Sell IT! Ltd | Wholesale & retail | 2025 |
| DR. Morberg Pain Psychological Services Ltd | Health & social care | 2016 |
| Dragonfly Corporate Solutions Limited | Professional & scientific | 2008 |
| Drama Academy Ltd | Education | 2018 |
| Drama Academy Schools Ltd | Education | 2022 |
| Dumgoyne Capital Limited | Professional & scientific | 2025 |
| Dummer Enterprise Ltd | Construction | 2025 |
| Durham Place Property NO. 1 Limited | Real estate | 2002 |
| Durham Place Property NO. 2 Limited | Real estate | 2002 |
| E Bike Rider Ltd | Wholesale & retail | 2024 |
| E V Developments NE Ltd | Construction | 2022 |
| Eagle Place Properties Limited | Real estate | 2007 |
| EAR LAB Limited | Health & social care | 2022 |
| East Fourteen Property Ltd | Real estate | 2014 |
| East Wittering Development Ltd | Real estate | 2021 |
| Eastcastle Real Estate Limited | Real estate | 2026 |
| Eastern Eccentric Ltd | Wholesale & retail | 2013 |
| Easy Tiger Asset Management Limited | Real estate | 2004 |
| Eco-Sparks Ltd | Construction | 2010 |
| Ecocast Technologies Limited | Financial services | 2024 |
| Edenbridge Capital Ltd | Professional & scientific | 2025 |
| Edenbridge Ltd | Professional & scientific | 2022 |
| Either Holdings Limited | Professional & scientific | 2022 |
| Elect Executive Search Ltd | Administrative & support | 2011 |
| Elevate Solar Marketing Ltd | Administrative & support | 2026 |
| Ellipsis Project Management Ltd | Information & communication | 2024 |
| Ellis Food Services Ltd | Wholesale & retail | 2011 |
| Ellis Forbes Ltd | Wholesale & retail | 2018 |
| ELM Carpentry & Construction Ltd | Manufacturing | 2020 |
| Elmwood Home Improvements Limited | Construction | 2009 |
| Emanate Consultants Ltd | Professional & scientific | 1999 |
| Emberfeld Ltd | Information & communication | 2025 |
| Emergent Asset Management Ltd. | Other services | 1995 |
| Emily Dungey Limited | Professional & scientific | 2017 |
| Emma Smyth Limited | Professional & scientific | 1991 |
| Emolumentum Limited | Professional & scientific | 2018 |
| Empowering Possible Ltd | Education | 2023 |
| Entente Cordiale Properties Ltd | Real estate | 2020 |
| Entwistle Digital Group Ltd | Wholesale & retail | 2025 |
| Envaero Ltd | Professional & scientific | 2023 |
| Environmental Forestry UK Ltd | Agriculture & fishing | 2010 |
| Ephaven Edit Ltd | Wholesale & retail | 2023 |
| Ephesus Traditional Barber Ltd | Other services | 2025 |
| Equimotion Ltd | Professional & scientific | 2025 |
| Ericht West Grange Limited | Agriculture & fishing | 2018 |
| Erskine Larsen Ltd | Professional & scientific | 2026 |
| ESP Financial Solutions Limited | Professional & scientific | 2026 |
| Ethical Purchasing Limited | Professional & scientific | 2014 |