| Dimduk Ltd | Information & communication | 2025 |
| Dime Consulting Ltd | Information & communication | 2024 |
| DIMON35 Transport Ltd | Transport & logistics | 2018 |
| Dino Ship Limited | Wholesale & retail | 2025 |
| Dinoshire Limited | Agriculture & fishing | 1985 |
| Direct Cars (Lincoln) Limited | Transport & logistics | 2007 |
| Direct Edge Limited | Wholesale & retail | 2013 |
| Direct Hotel Bookings Limited | Information & communication | 2024 |
| Direct Properties (2024) Limited | Real estate | 2023 |
| Directory Business Services Limited | Information & communication | 2010 |
| Directpremium Property Management Limited | Households | 1993 |
| Disassistory Ltd | Information & communication | 2011 |
| Discount Electrics Limited | Wholesale & retail | 2005 |
| Distinction Empires Ltd | Administrative & support | 2018 |
| Distract Ltd | Administrative & support | 2015 |
| Diverse Skincare Formulations Limited | Manufacturing | 2025 |
| Diversity Adult Support Services Limited | Health & social care | 2012 |
| Divine Ideas Limited | Wholesale & retail | 2008 |
| Dixon Super Car Wash Ltd | Administrative & support | 2024 |
| DJ Construction Solutions Ltd | Construction | 2025 |
| DJ Joinery & Home Improvements Ltd. | Construction | 2016 |
| DJ Tollerton Coaching Limited | Other services | 2024 |
| DJB Machine Parts Ltd | Wholesale & retail | 2024 |
| DJH Equine Transport Limited | Agriculture & fishing | 2025 |
| DJH Holdings Ltd | Financial services | 2024 |
| DJR Engineering & Management Limited | Construction | 2008 |
| DJS Training Ltd | Education | 2026 |
| DJT Haulage Ltd | Transport & logistics | 2024 |
| DJT Leisure Ltd | Hospitality | 2024 |
| DK (Lincoln) Limited | Construction | 2020 |
| DK Tippers Limited | Construction | 2024 |
| Dkh-Payroll Limited | Professional & scientific | 2016 |
| DKS Electrical Services Ltd | Construction | 2016 |
| DKW Limited | Administrative & support | 2015 |
| DL Trigg Ltd | Manufacturing | 2026 |
| DLD Training Limited | Extraterritorial | 1997 |
| DLF Interiors and Renovations Limited | Construction | 2025 |
| DLK Group Ltd | Construction | 2019 |
| DLK Property Limited | Real estate | 2025 |
| DLS Blinds Limited | Construction | 2020 |
| DM Catering Concessions Limited | Hospitality | 2014 |
| DM Orthopaedics Ltd | Health & social care | 2016 |
| DM Rentals Ltd | Real estate | 2022 |
| DM Sea Work Ltd | Construction | 2019 |
| DMA Eztim Ltd | Transport & logistics | 2025 |
| Dmbs Design Ltd | Professional & scientific | 2009 |
| DMG SVC Ltd | Professional & scientific | 2019 |
| DMH Electrics Ltd | Other services | 2011 |
| Dmhd Security Services Ltd | Administrative & support | 2022 |
| DMK4 Limited | Professional & scientific | 2020 |
| DMR London Ltd | Wholesale & retail | 2016 |
| DMW Consultancy Services Ltd | Professional & scientific | 2021 |
| DMW Decommissioning Services Ltd | Professional & scientific | 2025 |
| DMW Properties (Lincs) Limited | Construction | 2010 |
| Dnada Digital Ltd | Professional & scientific | 2026 |
| DNC Marine Services Ltd | Manufacturing | 2020 |
| DNZ One Limited | Real estate | 2022 |
| DNZ Renovations Limited | Real estate | 2024 |
| Dobby Homes Ltd | Real estate | 2025 |
| Dobson Assets Limited | Professional & scientific | 2000 |
| Dobson Homes Limited | Real estate | 2026 |
| Dobson UK Limited | Construction | 2023 |
| Dobsons Online Trading Ltd | Information & communication | 2017 |
| Dockerty Investments Limited | Real estate | 2020 |
| Doctorcare PPM Ltd | Administrative & support | 2021 |
| Doctors Limited | Health & social care | 2023 |
| Doddington Commercial Property Limited | Real estate | 2012 |
| Doddington Estates Limited | Real estate | 2003 |
| Dodo Forensics Ltd | Health & social care | 2011 |
| Does Electrical Ltd | Construction | 2020 |
| Dog Sports Online Ltd | Arts & recreation | 2022 |
| Dogeross Ltd | Construction | 2022 |
| Dogwood Lincoln Limited | Other services | 1997 |
| Doherty Civil Engineering Limited | Construction | 2014 |
| Doherty Construction (Lincoln) Limited | Construction | 2025 |
| Dolphin Mobility East Midlands Limited | Wholesale & retail | 2001 |
| Domage E&A Limited | Wholesale & retail | 2025 |
| Domestic Free Flow Services Limited | Administrative & support | 2018 |
| Dominus ET AL Limited | Administrative & support | 2017 |
| Dong Ying 1982 Limited | Hospitality | 2017 |
| Donnovan Joinery Ltd | Manufacturing | 2020 |
| Doomys Ltd | Transport & logistics | 2025 |
| Doortechnik Limited | Manufacturing | 2007 |
| DOR Developments Limited | Construction | 2008 |
| Dorian AI Ltd | Information & communication | 2025 |
| Dorman Diesels Limited | Manufacturing | 2009 |
| Dorsia Finance Ltd | Financial services | 2012 |
| Dosh Rentals Limited | Real estate | 2004 |
| Dost Services Ltd | Transport & logistics | 2025 |
| Dote Developments Ltd | Construction | 2024 |
| Dote on US Holdings Ltd | Financial services | 2026 |
| Double D Live Ltd | Arts & recreation | 2019 |
| Double M Event Caterers Limited | Hospitality | 2004 |
| Double R Motors Ltd | Wholesale & retail | 2024 |
| Double Red Limited | Professional & scientific | 2001 |
| Double Two Laburnum Ltd | Real estate | 2026 |
| Doughty Cakes Holdings Limited | Financial services | 2017 |
| Doughty Cakes Limited | Wholesale & retail | 2001 |
| Dove & Co Ltd | Construction | 2013 |
| Dove Hvac Services Ltd | Construction | 2025 |