| 1000041280 | Descoberta Ofuscante LDA | PT-Portugal | Company | Yes | Alumnus | ESA BIC Portugal | |
| 1000040724 | deltaVision GmbH | DE-Germany | Company | Yes | Alumnus | ESA BIC Bavaria | |
| 1000042174 | DeltaOrbit GmbH | DE-Germany | Company | Yes | Alumnus | ESA BIC Bavaria | |
| 1000034007 | DELOX - INVESTIGAÇÃO, PROCESSOS E EQUIPAMENTOS CIENTÍFICOS, LDA | PT-Portugal | Company | No | Alumnus | ESA BIC Portugal | |
| 1000038667 | DEEPLIGHT | CH-Switzerland | Company | Yes | Alumnus | ESA BIC Switzerland | |
| 1000043319 | Deep Scientific | LT-Lithuania | Company | No | Incubatee | ESA BIC Lithuania | |
| 1000030959 | Deep Planet Ltd. | GB-United Kingdom | Company | Yes | Alumnus | ESA BIC UK | |
| 1000043785 | Deep LS GmbH | DE-Germany | Company | Yes | Alumnus | ESA BIC Hessen | |
| 1000029530 | Deep Blue Globe UG (Halftungsbeschrankt) | DE-Germany | Company | No | Alumnus | ESA BIC Hessen | |
| 1000033120 | Dcubed GmbH | DE-Germany | Company | Yes | Alumnus | ESA BIC Bavaria | |
| 1000037924 | DBSpace S.R.L. | IT-Italy | Company | Yes | Alumnus | ESA BIC Turin | |
| 1000028518 | DATelite | HU-Hungary | Company | Yes | Alumnus | ESA BIC Hungary | |
| 1000031516 | Datarella GmbH | DE-Germany | Company | Yes | Alumnus | ESA BIC Hessen | |
| 1000042417 | Data Machine Intelligence Solutions GmbH | DE-Germany | Company | Yes | Alumnus | ESA BIC Bavaria | |
| 1000044719 | Danu Sports Limited | IE-Ireland | Company | No | Alumnus | ESA BIC Ireland | |
| 1000041477 | Danish Graphene ApS | DK-Denmark | Company | Yes | Alumnus | ESA BIC Denmark | |
| 1000044047 | DanaDynamics ApS | DK-Denmark | Company | No | Alumnus | ESA BIC Denmark | |
| 1000045725 | Daisytuner UG (haftungsbeschränkt) | DE-Germany | Company | Yes | Incubatee | ESA BIC Hessen | |
| 1000034256 | D3 SEERON KFT. | HU-Hungary | Company | No | Alumnus | ESA BIC Hungary | |
| 1000028099 | CyStellar Nordic AB | SE-Sweden | Company | No | Alumnus | ESA BIC Sweden | |