| Dinsbury Capital Investment Limited | Financial services | 2018 |
| Dinsbury Limited | Professional & scientific | 2007 |
| Dion Singh Scarffolding Ltd | Construction | 2020 |
| Dipesh Shah Design Studio Limited | Professional & scientific | 2005 |
| Direct Clinical Limited | Health & social care | 2021 |
| Direct Food & Packaging Limited | Wholesale & retail | 2013 |
| Directlink Travel Ltd | Administrative & support | 2010 |
| Discobility.Io Ltd | Administrative & support | 2023 |
| Discovermi Ltd | Professional & scientific | 2011 |
| Disembarks Limited | Real estate | 2023 |
| Diva Unisex Salon Ltd | Other services | 2015 |
| DIVA303 Limited | Other services | 2024 |
| Divine Dreams Ltd | Wholesale & retail | 2024 |
| Divish Limited | Real estate | 2019 |
| Divitiae Inc Ltd | Wholesale & retail | 2020 |
| Divla Ltd | Construction | 2017 |
| Divorgass Professionals Ltd | Administrative & support | 2022 |
| Divrei Kodesh Limited | Extraterritorial | 2022 |
| Dixian Limited | Hospitality | 2018 |
| Dixy Chicken (Edgware) Ltd | Hospitality | 2016 |
| Dixy Chicken MB Ltd | Hospitality | 2023 |
| Diyár Cafe Ltd | Hospitality | 2023 |
| DJ Property Consultants Limited | Real estate | 2022 |
| DJB Access Limited | Administrative & support | 2015 |
| DJD Chauffeurhire Ltd | Transport & logistics | 2019 |
| Djdreamanddhol Ltd | Wholesale & retail | 2022 |
| Djembe Logistics Ltd | Construction | 2018 |
| DJF Construction Management Limited | Construction | 2015 |
| DJK Portfolio Ltd | Real estate | 2025 |
| DJM Enterprises Ltd | Wholesale & retail | 2015 |
| DK Build Services Ltd | Construction | 2026 |
| DKA Consultants (Holdings) Ltd | Financial services | 2025 |
| DKT Properties Ltd | Real estate | 2021 |
| DL International Trading Limited | Wholesale & retail | 2012 |
| DLH Demolition & Labourers Ltd | Construction | 2025 |
| DM Electrician Ltd. | Construction | 2018 |
| DME Scenery Ltd | Manufacturing | 2024 |
| DMH Real Estate Ltd | Real estate | 2021 |
| Dmlj Projects Limited | Professional & scientific | 2025 |
| DMM Drainage Ltd | Construction | 2026 |
| DMM Studios Ltd | Other services | 2025 |
| Dmvk Limited | Wholesale & retail | 2024 |
| DN Elements Limited | Construction | 2021 |
| DN Rusu Services Ltd | Administrative & support | 2019 |
| DN Wellbeing Ltd | Health & social care | 2024 |
| Dna&A Ltd | Construction | 2024 |
| Dna-Tech Computing and Education Ltd | Information & communication | 2016 |
| DNC Maintenance Limited | Construction | 2021 |
| Dnldn Limited | Other services | 2025 |
| DNP Dent Limited | Health & social care | 2022 |
| DNR Consolidated Ltd. | Financial services | 2016 |
| Dnsh Consulting Ltd. | Information & communication | 2011 |
| Dnslink Ltd | Transport & logistics | 2013 |
| DNY Brickwork Limited | Construction | 2026 |
| DO More Core Ltd | Wholesale & retail | 2020 |
| DOC Konto Ltd | Wholesale & retail | 2023 |
| DOC Medics Limited | Health & social care | 2013 |
| Dochealth Independent UK Limited | Health & social care | 2026 |
| Dockmore Limited | Professional & scientific | 2014 |
| Document Exchange Company LLP | | 2006 |
| Documentation Services Ltd | Professional & scientific | 2024 |
| Doggie & Gabana Ltd | Other services | 2021 |
| Dolbridge Limited | Professional & scientific | 2025 |
| Dolling Wholesale Ltd | Wholesale & retail | 2026 |
| Dolphin Fish and Kebab Ltd | Hospitality | 2024 |
| Dolphin Pizza Ltd | Hospitality | 2024 |
| Dolphin Shipping Line (UK) Limited | Administrative & support | 2012 |
| Dom's Squad Ltd | Construction | 2019 |
| Domestic Shine Limited | Administrative & support | 2023 |
| Domi Scaffolding Ltd | Construction | 2026 |
| Domo Luggage Limited | Wholesale & retail | 2022 |
| Domus Abroad Ltd | Real estate | 2007 |
| Domus Vision Ltd | Real estate | 2024 |
| Domuslaudis Limited | Extraterritorial | 2024 |
| DON Builders Limited | Construction | 2014 |
| DON Olivio Ltd | Wholesale & retail | 2026 |
| Donal Moore Limited | Professional & scientific | 2021 |
| Doncapo Ltd | Other services | 2023 |
| Dorin Construct Ltd | Other services | 2018 |
| Dorinel Haulage Ltd | Wholesale & retail | 2026 |
| Dosger Limited | Professional & scientific | 2022 |
| Doshin Limited | Real estate | 2016 |
| Doshinet Limited | Information & communication | 2017 |
| Dotfield Software Solutions Limited | Information & communication | 1997 |
| Douglas Turner Limited | Extraterritorial | 2004 |
| Douglk Design Services Limited | Professional & scientific | 2013 |
| Dovegift Limited | Professional & scientific | 1987 |
| Dover Digital Marketing Ltd | Professional & scientific | 2025 |
| Dovestarr Digital Limited | Administrative & support | 2019 |
| DOW Properties Limited | Wholesale & retail | 1987 |
| Downdale Limited | Professional & scientific | 2018 |
| Downhills Limited | Information & communication | 2025 |
| Dowsett Properties Ltd | Real estate | 2020 |
| DP Interest Limited | Real estate | 2025 |
| DPC Rail Services Limited | Construction | 2016 |
| DPO Interiors Ltd | Construction | 2017 |
| DPO Logistics Ltd | Transport & logistics | 2025 |
| DR Ariane Sampson Ltd | Health & social care | 2022 |
| DR H Psychology Ltd | Education | 2025 |
| DR Health Supplies Limited | Wholesale & retail | 2023 |