| DK Garage Ltd | Wholesale & retail | 2015 |
| DKG Property Rentals Limited | Real estate | 2023 |
| DLM Bidco Limited | Financial services | 2023 |
| DLM Midco I Limited | Professional & scientific | 2023 |
| DLM Midco II Limited | Professional & scientific | 2023 |
| DM & F Investments Limited | Professional & scientific | 1997 |
| Dm.Mechanics Ltd | Wholesale & retail | 2025 |
| DMM Quarry Services Limited | Mining & quarrying | 2014 |
| DNA Staffing Limited | Administrative & support | 2022 |
| DNV Events Ltd | Hospitality | 2026 |
| DNY Trans Ltd | Transport & logistics | 2016 |
| DOA Commercial Property Ltd | Construction | 2017 |
| DOA Sales Ltd | Wholesale & retail | 2021 |
| DOA Special Facilities Limited | Financial services | 2014 |
| DOA Underwriting Limited | Financial services | 2004 |
| Dobson Partners Property Ltd | Real estate | 2018 |
| Doggigo Daycare Limited | Other services | 2026 |
| Dogroom Studio Limited | Other services | 2020 |
| Domans Holdings Ltd | Financial services | 2025 |
| Domans Residential Limited | Households | 2011 |
| Domex Properties and Management Ltd | Real estate | 2025 |
| Domicile Design Ltd | Wholesale & retail | 2016 |
| Dominion Brewery Company Limited | Manufacturing | 2012 |
| Dominion City Chelmsford Limited | Other services | 2026 |
| Don's Coaches (Dunmow) Limited | Transport & logistics | 1977 |
| Donelle & Tailor Homes Ltd | Hospitality | 2025 |
| DOO IT Ltd | Other services | 2019 |
| Doolittle Media Limited | Information & communication | 2016 |
| Doorsec Security Solutions (UK) Ltd | Administrative & support | 2016 |
| DOT R Limited | Information & communication | 1996 |
| Dotnet Digital Ltd | Information & communication | 1997 |
| Dots (UK) Ltd | Wholesale & retail | 2012 |
| Dougie Ironside Ltd | Transport & logistics | 2023 |
| Dove House SIX Limited | Real estate | 2016 |
| Dovecote Care Homes Limited | Health & social care | 1993 |
| Dovehouse Yard Management Company Limited | Real estate | 2016 |
| Down to Earth Auto Electrics Ltd | Manufacturing | 2023 |
| Downstream Research & Conservation Ltd | Professional & scientific | 2017 |
| Downsway Construction Limited | Construction | 2013 |
| Doyenne the Label Ltd | Wholesale & retail | 2023 |
| DP Property Sourcing Ltd | Real estate | 2021 |
| DP Relocations UK Limited | Hospitality | 2013 |
| DPF Green (Braintree) Ltd | Wholesale & retail | 2024 |
| DR Creative Designs Ltd | Professional & scientific | 2011 |
| DRAINAGE365 Limited | Construction | 2013 |
| Drips’N’Drags Ltd | Other services | 2024 |
| Drive 2 Save Lives Ltd | Health & social care | 2025 |
| Drive Nation Autos Ltd | Wholesale & retail | 2025 |
| Drive Transport UK Limited | Transport & logistics | 2009 |
| Driven Training Limited | Education | 2009 |
| DS Truck & BUS Services Ltd | Wholesale & retail | 2023 |
| DSB Emergency Service Solutions Limited | Professional & scientific | 2017 |
| DSJ Group Limited | Construction | 2025 |
| DTO Whittons Limited | Financial services | 2019 |
| Dubz-By-Dan Ltd | Wholesale & retail | 2026 |
| Duckers Consultancy Limited | Administrative & support | 2013 |
| Duckers Group Limited | Financial services | 2017 |
| DUEM7 Ltd | Wholesale & retail | 2024 |
| Dunmow Glass Limited | Construction | 2000 |
| Dupliq Holdings Limited | Financial services | 2024 |
| Dupliq Ltd | Administrative & support | 2019 |
| Durnthal Limited | Arts & recreation | 2021 |
| DX12 Diodes Limited | Wholesale & retail | 2019 |
| DX12 Property Solutions Ltd | Real estate | 2025 |
| Dyfed Richards Limited | Construction | 2003 |
| Dynamic Tyres Limited | Manufacturing | 2023 |
| Dynamix Gymnastics Club Ltd | Arts & recreation | 2013 |
| Dynan Property Group Limited | Real estate | 2019 |
| Dynellis Limited | Administrative & support | 2023 |
| E Interior Ltd | Construction | 2025 |
| E Sentry Systems Limited | Manufacturing | 2004 |
| E-Four Cabling Limited | Construction | 2000 |
| E-Surg Ltd | Administrative & support | 2010 |
| E. O. Jones Construction Ltd | Construction | 2025 |
| E.I.D Pro Fire Protection Ltd | Construction | 2023 |
| E.M.C (Braintree) Limited | Construction | 2018 |
| E1 Car Colours Ltd | Wholesale & retail | 2009 |
| E16 Developments Ltd | Real estate | 2018 |
| Eager Properties Developments Limited | Construction | 2020 |
| Eager Properties Ltd | Real estate | 2019 |
| Eagle Logistic London Ltd | Wholesale & retail | 2021 |
| Eagle RAY OIL Limited | Wholesale & retail | 2026 |
| Eagle RAY Properties Ltd | Real estate | 2019 |
| Eagle RAY Ventures Ltd | Professional & scientific | 2023 |
| Eames Potatoes Limited | Wholesale & retail | 2014 |
| Earlyinform Limited | Construction | 1994 |
| East Anglia Door Group Ltd | Construction | 2022 |
| East Anglia Fire Shutters Ltd | Construction | 2022 |
| East Coast Paint Supplies Limited | Wholesale & retail | 2019 |
| East Coast Transport Services Ltd | Transport & logistics | 2016 |
| Eastern Aroma CM7 Ltd | Hospitality | 2024 |
| Eastern Current Electrical Ltd | Construction | 2019 |
| Eastern Garage (Essex) Limited | Wholesale & retail | 1989 |
| Eastry Investments Limited | Transport & logistics | 1988 |
| Easwrith Limited | Professional & scientific | 2023 |
| Easy Does Coaching Ltd | Arts & recreation | 2023 |
| Easy Freezee Limited | Wholesale & retail | 2023 |
| Easycare Blinds Limited | Wholesale & retail | 2019 |
| Easypeasylemonsqueezy Ltd | Hospitality | 2014 |
| Ebcleaning Limited | Administrative & support | 2024 |