| 1000039329 | Corintis SA | CH-Switzerland | Company | No | Alumnus | ESA BIC Switzerland | |
| 1000028834 | CropOM | AT-Austria | Company | No | Alumnus | ESA BIC Austria | |
| 1000041412 | CSHARK SRL | IT-Italy | Company | No | Incubatee | ESA BIC Lazio | |
| 1000042115 | CSTREAM UG | DE-Germany | Company | No | Alumnus | ESA BIC Bavaria | |
| 1000045304 | Cstrider AB | SE-Sweden | Company | No | Incubatee | ESA BIC Sweden | |
| 1000031834 | CybELE LAWGICAL LDA | PT-Portugal | Company | No | Alumnus | ESA BIC Portugal | |
| 1000042623 | cyclebee GmbH | AT-Austria | Company | No | Incubatee | ESA BIC Austria | |
| 1000028099 | CyStellar Nordic AB | SE-Sweden | Company | No | Alumnus | ESA BIC Sweden | |
| 1000034256 | D3 SEERON KFT. | HU-Hungary | Company | No | Alumnus | ESA BIC Hungary | |
| 1000044047 | DanaDynamics ApS | DK-Denmark | Company | No | Alumnus | ESA BIC Denmark | |
| 1000044719 | Danu Sports Limited | IE-Ireland | Company | No | Alumnus | ESA BIC Ireland | |
| 1000029530 | Deep Blue Globe UG (Halftungsbeschrankt) | DE-Germany | Company | No | Alumnus | ESA BIC Hessen | |
| 1000043319 | Deep Scientific | LT-Lithuania | Company | No | Incubatee | ESA BIC Lithuania | |
| 1000034007 | DELOX - INVESTIGAÇÃO, PROCESSOS E EQUIPAMENTOS CIENTÍFICOS, LDA | PT-Portugal | Company | No | Alumnus | ESA BIC Portugal | |
| 1000045781 | Dhruva Space GmbH | AT-Austria | Company | No | Alumnus | ESA BIC Austria | |
| 1000042253 | Digital Earth Solutions S.L. | ES-Spain | Company | No | Incubatee | ESA BIC Madrid Region | |
| 1000039230 | Diramics AG | CH-Switzerland | Company | No | Alumnus | ESA BIC Switzerland | |
| 1000041643 | DLTEO GmbH | AT-Austria | Company | No | Alumnus | ESA BIC Austria | |
| 1000047562 | DNAir | CH-Switzerland | Company | No | Incubatee | ESA BIC Switzerland | |
| 1000037252 | DocTec | AT-Austria | Company | No | Alumnus | ESA BIC Austria | |