| Daily Comfort Ltd | Wholesale & retail | 2025 |
| Daily Dwelling Limited | Manufacturing | 2024 |
| Daily Nova Ltd | Wholesale & retail | 2025 |
| Dairun Ltd | Wholesale & retail | 2024 |
| Daize Trading Ltd | Wholesale & retail | 2024 |
| Daju Bhai Digital Ltd | Information & communication | 2026 |
| Dalei Mini Split Air Conditioner Ltd | Wholesale & retail | 2025 |
| Daler Polaris Limited | Professional & scientific | 2008 |
| Daley Home Developments Limited | Real estate | 2018 |
| Dalian Chengfeng Bearing Group Co., Ltd | Administrative & support | 2020 |
| Dalini Limited | Real estate | 2017 |
| Daliy Network Services Co., Ltd | Wholesale & retail | 2025 |
| Dallex Trade Ltd. | Professional & scientific | 2004 |
| Daltay Solutions Ltd | Professional & scientific | 2011 |
| Dalton Fertilizers (UK) Ltd | Manufacturing | 2025 |
| Damihow Ltd | Wholesale & retail | 2019 |
| Damp Solve Surveying Ltd | Construction | 2026 |
| Dampy Music Ltd | Arts & recreation | 2023 |
| DAN Smarts Access Scaffolding Limited | Construction | 2023 |
| Dandelion Drift Limited | Wholesale & retail | 2025 |
| Dane Commercial Services Ltd | Information & communication | 2025 |
| Dane Group Ltd | Financial services | 2025 |
| Dane Property Investments Ltd | Real estate | 2023 |
| Dang Clothing Ltd | Wholesale & retail | 2025 |
| Dangdang Ltd | Other services | 2025 |
| Dangerous Productions Limited | Information & communication | 2006 |
| Dangme Legacy Movement CIC | Wholesale & retail | 2025 |
| Daniel Finch Ltd | Information & communication | 2015 |
| Danon LP | | 2014 |
| Dansk E-Handel Ltd | Wholesale & retail | 2025 |
| Dant Fang Trading Limited | Wholesale & retail | 2025 |
| DAO Advertising LLP | | 2024 |
| DAO Technology LP | | 2019 |
| Daofen Ltd | Wholesale & retail | 2025 |
| Daoist Association of United Kingdom | Education | 2024 |
| Daoqigongyangzf Co., Ltd | Wholesale & retail | 2025 |
| Dapace Limited | Real estate | 2024 |
| Dapsec Ltd | Administrative & support | 2021 |
| Darbirlin Florissan Ltd | Wholesale & retail | 2025 |
| Darblay Limited | Other services | 2016 |
| Darby and Danielles Ltd | Extraterritorial | 2004 |
| Dardin Commerce Ltd | Wholesale & retail | 2022 |
| Darimedias Ltd | Information & communication | 2025 |
| Daring Home Decor Ltd | Other services | 2024 |
| Darknoon E-Commerce Co Ltd | Wholesale & retail | 2025 |
| Darkworldzero Ltd | Wholesale & retail | 2025 |
| Darram Limited | Wholesale & retail | 2025 |
| Darren Crooks Fashion Limited | Wholesale & retail | 2026 |
| Dasib Property LLP | | 2024 |
| Data Crest Group Co., Ltd | Wholesale & retail | 2025 |
| Data Science UK Technologies LLP | | 2022 |
| Dataflux Crypto Ltd | Information & communication | 2025 |
| Datagobi Limited | Information & communication | 2018 |
| Datagrain Systems Limited | Information & communication | 1999 |
| Datamatics Technologies Limited | Information & communication | 2025 |
| Datapulse Technology Ltd | Wholesale & retail | 2025 |
| Dataquant Analytics Ltd | Information & communication | 2022 |
| Datarrative Limited | Information & communication | 2026 |
| Datasea Information Technology Ltd | Information & communication | 2021 |
| Datasprekt Limited | Information & communication | 2022 |
| Datavox Solutions Limited | Administrative & support | 2000 |
| Date Pure Souls Ltd | Other services | 2025 |
| Datum Futures Ltd | Wholesale & retail | 2025 |
| David Boyd Ltd | Information & communication | 2016 |
| David Industries Ltd | Wholesale & retail | 2021 |
| David J. Cottrell Ltd | Manufacturing | 2026 |
| Davidson Cadow Ltd | Wholesale & retail | 2025 |
| Davis Tree Care & Landscape Services Ltd | Agriculture & fishing | 2023 |
| Davka Food & Drink Limited | Wholesale & retail | 2018 |
| Davom International Global Ltd | Education | 2026 |
| Dawamala Ltd | Health & social care | 2023 |
| Dawn PAW UK Limited | Wholesale & retail | 2025 |
| Dawn Star Limited | Administrative & support | 2004 |
| Dawnmist Limited | Wholesale & retail | 2024 |
| Dawson & Jason Property and Maintenance Ltd | Real estate | 2026 |
| Daydreaming Rabbits Quest Limited | Wholesale & retail | 2024 |
| Daym Ecom Ltd | Wholesale & retail | 2025 |
| Daymisfurry Ltd | Wholesale & retail | 2025 |
| Dayone Clearance Ltd | Professional & scientific | 2026 |
| Days Real Estate Ltd | Real estate | 2026 |
| Daystar Int'L Group Ltd | Wholesale & retail | 2012 |
| DC Services (ICT) Ltd | Information & communication | 2017 |
| Dcellma Ltd | Extraterritorial | 2025 |
| Dchn Limited | Administrative & support | 2023 |
| Dcue Hdfing Trading Limited | Wholesale & retail | 2025 |
| Ddam Property Ltd | Real estate | 2025 |
| Ddflett Ltd | Professional & scientific | 2025 |
| DE Fahmy Limited | Information & communication | 2025 |
| DEA Engineering Limited | Wholesale & retail | 2023 |
| Dead Good Drinks Ltd | Hospitality | 2026 |
| Deal Snatcher Ltd | Wholesale & retail | 2026 |
| Deans Management Services Limited | Professional & scientific | 2011 |
| Deanshill Logistics Limited | Transport & logistics | 2020 |
| Dearborn Alder Ltd | Wholesale & retail | 2025 |
| Dearfurbaby Pet Products Ltd | Manufacturing | 2025 |
| Debonace Ltd | Wholesale & retail | 2024 |
| Debrak Group Ltd | Wholesale & retail | 2025 |
| Decantessence Ltd | Wholesale & retail | 2025 |
| Decemno Limited | Transport & logistics | 2018 |
| Decisive Investments Ltd | Real estate | 2018 |