| Da'Vinci Consultancy Limited | Information & communication | 2022 |
| DAB Quality Services Limited | Professional & scientific | 2021 |
| Daba Services Limited | Wholesale & retail | 2004 |
| Daex Properties Ltd | Real estate | 2025 |
| Daffodil Homehelp Ltd | Health & social care | 2023 |
| Dagreen Services Limited | Administrative & support | 2025 |
| Dahexd Studio Ltd | Wholesale & retail | 2022 |
| Daih Site Services Ltd | Construction | 2024 |
| Dailypay UK Holdings Ltd | Financial services | 2023 |
| Dairy House Livery Ltd | Agriculture & fishing | 2022 |
| Daisy Chain Connect Limited | Administrative & support | 2024 |
| Daisy Daisy Floral Ltd | Wholesale & retail | 2024 |
| Daisy Nook Gardens Residents Association Limited | Households | 2006 |
| Daizlot Investments Limited | Financial services | 2025 |
| DAJ Contract Services Limited | Professional & scientific | 2025 |
| Daja Capital Investments Limited | Manufacturing | 2014 |
| DAL Connectives Ltd | Information & communication | 2016 |
| Dalati Limited | Professional & scientific | 2023 |
| Dale Mill (Hathersage) Limited | Households | 1989 |
| Daley Property Services Limited | Administrative & support | 2017 |
| Dalia Documentation Limited | Professional & scientific | 2025 |
| Dalpura Consulting Limited | Professional & scientific | 2023 |
| Dalytix Ltd | Information & communication | 2025 |
| Damo Altrincham Ltd | Hospitality | 2022 |
| Damp 2 DRY Solutions Ltd | Construction | 2019 |
| DAN Boon Properties Limited | Real estate | 2019 |
| DAN Fran Pear Limited | Information & communication | 2015 |
| DAN LEE VO Ltd | Professional & scientific | 2007 |
| Dana Point Ltd | Real estate | 2020 |
| Danam Consultancy Limited | Administrative & support | 2024 |
| Danat Solutions Limited | Professional & scientific | 2021 |
| Dancando Limited | Information & communication | 2017 |
| Dance Designs Limited | Manufacturing | 2004 |
| Dandara Limited | Extraterritorial | 2003 |
| Dandara Living Bedminster Green GP Limited | Real estate | 2019 |
| Dandara Living Bedminster Green LP | | 2021 |
| Dandara Living Bromsgrove LP | | 2017 |
| Dandara Living Burr ST GP Limited | Real estate | 2020 |
| Dandara Living Burr ST LP | | 2021 |
| Dandara Living Clarence RD GP Limited | Real estate | 2021 |
| Dandara Living Clarence RD LP | | 2021 |
| Dandara Living Contracting Limited | Construction | 2021 |
| Dandara Living CSC GP Limited | Real estate | 2017 |
| Dandara Living CSC LP | | 2017 |
| Dandara Living Developments Limited | Construction | 2021 |
| Dandara Living Glasgow Harbour LP | | 2017 |
| Dandara Living Mill Mead LP | | 2020 |
| Dandara Living Moseley (a) LP | | 2020 |
| Dandara Living Moseley (C) LP | | 2020 |
| Dandara Living Moseley (D) LP | | 2020 |
| Dandara Living Moseley GP (a) Limited | Real estate | 2020 |
| Dandara Living Moseley GP (C) Limited | Real estate | 2020 |
| Dandara Living Moseley GP (D) Limited | Real estate | 2020 |
| Dandara Living Stafford Street LP | | 2017 |
| Dandara Living Watkin RD GP Limited | Real estate | 2021 |
| Dandara Living Watkin RD LP | | 2021 |
| Dandelion Consultancy Ltd | Professional & scientific | 2020 |
| Dane Valley Castings Limited | Manufacturing | 2012 |
| Danella Properties Limited | Real estate | 2021 |
| Danesgarth Management Company Limited | Extraterritorial | 2011 |
| Danewa Limited | Administrative & support | 2013 |
| Danewa Two Limited | Professional & scientific | 2024 |
| Dani Briers NED Limited | Professional & scientific | 2021 |
| Dani Briers Sales Director Limited | Professional & scientific | 2021 |
| Daniel Court (Partington) Management Limited | Households | 1996 |
| Daniel Court RTM Company Limited | Households | 2014 |
| Daniel Johnston Design Limited | Professional & scientific | 2022 |
| Daniel Massey Healthcare Limited | Health & social care | 2015 |
| Daniel Sargeant Ltd | Other services | 2016 |
| Daniel Tennent Limited | Professional & scientific | 2013 |
| Daniel Williams Consulting Limited | Professional & scientific | 2025 |
| Danny Chung Consulting Limited | Administrative & support | 2018 |
| Danny Newton Limited | Information & communication | 2014 |
| Dans Shopping and Bargains Ltd | Wholesale & retail | 2026 |
| Dantec Dynamics Limited | Manufacturing | 1983 |
| Danu Cyber Security Limited | Information & communication | 2023 |
| Danzoco Ltd | Real estate | 2023 |
| DAO Developments Ltd | Construction | 2006 |
| Daor Consulting Limited | Professional & scientific | 2015 |
| Dapr Estates Ltd | Real estate | 2020 |
| Dark Horse Digital Ltd | Professional & scientific | 2020 |
| Darren Proctor Limited | Administrative & support | 2007 |
| Darsai Ltd | Real estate | 2024 |
| Dart Bridge Development Engineering Limited | Wholesale & retail | 2014 |
| Darta AI Ltd | Arts & recreation | 2024 |
| Dartisan Limited | Professional & scientific | 2023 |
| DAS Consulting Ltd | Administrative & support | 2016 |
| DAS Management Services Limited | Administrative & support | 2010 |
| Dash 2001 Limited | Real estate | 2001 |
| Dash-Es Limited | Information & communication | 2013 |
| Dash-Es Property Limited | Real estate | 2026 |
| Dashmap Ltd | Information & communication | 2024 |
| Dast Studio Limited | Other services | 2022 |
| Data Intensity Group Limited | Information & communication | 2011 |
| Data Intensity Holdings Limited | Information & communication | 2015 |
| Data Intensity Limited | Information & communication | 1998 |
| Data Messaging & Communications Limited | Information & communication | 2006 |
| Data Pathways Limited | Information & communication | 1990 |
| Data Privacy Consulting Limited | Professional & scientific | 2010 |
| Data Privacy Outsourcing Limited | Professional & scientific | 2012 |