| Diamond Finish Smart Repairs Ltd | Wholesale & retail | 2023 |
| Diamond Gardening Services Ltd | Administrative & support | 2015 |
| Diamond Holdings (Antony) Ltd | Financial services | 2023 |
| Diamond Maintenance Ltd | Administrative & support | 2019 |
| Diamond Property Trustees Limited | Real estate | 1996 |
| Digital by Design Limited | Information & communication | 2013 |
| Dilkes and Sons Property Maintenance Ltd | Water & waste | 2023 |
| Dingley Associates Ltd | Information & communication | 2017 |
| Dingley Capital Limited | Real estate | 2016 |
| Dingley Hall Apartments Limited | Professional & scientific | 2014 |
| Dinny Hall Intangibles Limited | Extraterritorial | 2013 |
| Dinny Hall Retail Partners Limited | Wholesale & retail | 2015 |
| Dinnyhall Online Retail Limited | Wholesale & retail | 2024 |
| Dinnyhall Studio Limited | Professional & scientific | 2024 |
| Direct Labelling Limited | Manufacturing | 2003 |
| Direct Packaging Group Limited | Administrative & support | 2018 |
| Direct Packaging Limited | Administrative & support | 1986 |
| Direct Reader Holidays Limited | Administrative & support | 1996 |
| Discount Carpets & Flooring Ltd | Wholesale & retail | 2017 |
| Disparate Array Limited | Information & communication | 2019 |
| Dixon Medical Ltd | Health & social care | 2023 |
| Dixon ROV Services Ltd | Mining & quarrying | 2017 |
| DJ Bowrey Surgical Limited | Health & social care | 2019 |
| DJ Cadoo Limited | Professional & scientific | 2014 |
| Djital Ltd | Professional & scientific | 2024 |
| DJP Advisory Services Ltd | Financial services | 2025 |
| DJW Education Limited | Education | 1977 |
| DK Sekula Ltd | Manufacturing | 2026 |
| DK4 Developments Ltd | Real estate | 2024 |
| DKS Flooring Ltd | Construction | 2025 |
| DLB Investigations Ltd | Administrative & support | 2012 |
| DLK Consulting Ltd | Professional & scientific | 2025 |
| DLO Harrison Limited | Real estate | 2019 |
| DMC Europe Limited | Professional & scientific | 2008 |
| Dmdt Holdings Limited | Financial services | 2023 |
| DMG Rail Ltd | Construction | 2008 |
| DMP Property Lettings Ltd | Real estate | 2023 |
| DMS Developments Limited | Construction | 2023 |
| DMT Enterprises Ltd | Professional & scientific | 2022 |
| DNT3 (Construction) Ltd | Construction | 2018 |
| DNT3 Property Ltd | Real estate | 2021 |
| Doggie Dreamin Ltd | Other services | 2026 |
| Doggy Concepts Limited | Wholesale & retail | 2017 |
| Dogz Dinner Market Harborough C.I.C. | Professional & scientific | 2024 |
| DOM Coyote Productions Ltd | Arts & recreation | 2012 |
| DON Pino Ltd | Hospitality | 2025 |
| Doodle Workplace Limited | Information & communication | 2025 |
| Doorstep Desserts Loughborough Limited | Wholesale & retail | 2018 |
| Doorstep Desserts Ltd | Hospitality | 2014 |
| Doro Tape (UK) Limited | Wholesale & retail | 1988 |
| DP Events Services Ltd | Administrative & support | 2013 |
| Draft Design Ltd | Professional & scientific | 2022 |
| DRAFT2BOOK LLP | | 2025 |
| Dragley Beck Ltd | Manufacturing | 2021 |
| Dragon Cases Ltd | Professional & scientific | 2006 |
| Dragonfly Productions Ltd | Administrative & support | 2018 |
| Drainsafe Ltd | Other services | 2018 |
| Drew Consultancy Limited | Professional & scientific | 2025 |
| DRH Kind Limited | Wholesale & retail | 2024 |
| Drinks Masters Limited | Financial services | 2025 |
| DRS Assets Limited | Real estate | 1988 |
| DRV Creative Ltd | Professional & scientific | 2025 |
| DRY EYE Guys Ltd | Wholesale & retail | 2025 |
| DRY Vapour Blasting Ltd | Administrative & support | 2026 |
| DSB Accounting Services Ltd | Professional & scientific | 2015 |
| DSS Merton Road Ltd | Construction | 2018 |
| DT Lord Ltd | Administrative & support | 2022 |
| Du-Man Bookkeeping Services Ltd | Professional & scientific | 2021 |
| Duke Treasury Consulting Limited | Professional & scientific | 2006 |
| Duncan-Warden Properties Limited | Real estate | 2018 |
| Durden Ltd | Construction | 2015 |
| Durnin Research Limited | Administrative & support | 2018 |
| DW Performance Automotive Limited | Wholesale & retail | 2019 |
| DXS International PLC | Professional & scientific | 2007 |
| Dyslexiaid Ltd | Education | 2019 |
| E & a Design Solutions Ltd | Professional & scientific | 2011 |
| E & P Holdings Ltd | Professional & scientific | 2022 |
| E R FOX & SON Limited | Professional & scientific | 1998 |
| EA Care Ltd | Health & social care | 2018 |
| EAL Inclusive Limited | Education | 2020 |
| Ease Maritime Ltd | Transport & logistics | 2025 |
| Easha Consult Ltd | Professional & scientific | 2023 |
| East Anglia Heritage Limited | Construction | 2014 |
| East County Investments Limited | Administrative & support | 2018 |
| East Midlands Engineering Refrigeration and Light Distribution Limited | Transport & logistics | 2021 |
| East Midlands Kung FU Ltd | Arts & recreation | 2025 |
| Eastbridge Investment Limited | Real estate | 2018 |
| Eastfields Enterprise Park Management Company Limited | Real estate | 1989 |
| Easton Square Limited | Real estate | 2015 |
| Easy Haulage Ltd | Transport & logistics | 2015 |
| EB Software Solutions Limited | Information & communication | 2022 |
| Ebony Fire Limited | Administrative & support | 2012 |
| ECI Group Holdings Limited | Financial services | 2023 |
| Eckland Lodge Balconies and Railings Ltd | Manufacturing | 2023 |
| Eckland Lodge Business Park Limited | Agriculture & fishing | 2008 |
| Eckland Lodge Landscaping Ltd | Administrative & support | 2023 |
| Ecoroof Services (Europe) Limited | Construction | 2012 |
| ECT Collaborative Ltd | Administrative & support | 2021 |
| ED Tithecott Electrical Ltd | Construction | 2015 |
| Edacity Ltd | Education | 2015 |