| 1000034038 | Captiks | IT-Italy | Company | No | Alumnus | ESA BIC Lazio | |
| 1000048647 | Carbon Harvesters Global S.L.U. | ES-Spain | Company | No | Alumnus | ESA BIC Valencia | |
| 1000031671 | Carbon Waters | FR-France | Company | No | Alumnus | ESA BIC Sud France | |
| 1000042752 | CarbonAct AB | SE-Sweden | Company | No | Alumnus | ESA BIC Sweden | |
| 1000041268 | CargoKite GmbH | DE-Germany | Company | No | Alumnus | ESA BIC Bavaria | |
| 1000033512 | CargoSteps GmbH & Co. KG | DE-Germany | Company | No | Alumnus | ESA BIC Hessen | |
| 1000045941 | Carla Mae Arellano | AT-Austria | Company | No | Alumnus | ESA BIC Austria | |
| 1000044017 | Cassio-P SA | CH-Switzerland | Company | No | Alumnus | ESA BIC Switzerland | |
| 1000047624 | Catchwise AS | NO-Norway | Company | Yes | Alumnus | ESA BIC Norway | |
| 1000039064 | Cavicore UG (haftungsbeschränkt) | DE-Germany | Company | Yes | Alumnus | ESA BIC Hessen | |
| 1000043849 | CDXi Solutions P.C. | GR-Greece | Company | Yes | Alumnus | ESA BIC Greece | |
| 1000029367 | CEDRION | ES-Spain | Company | No | Alumnus | ESA BIC Madrid Region | |
| 1000042846 | Celemation B.V. | NL-Netherlands | Company | Yes | Alumnus | ESA BIC Noordwijk | |
| 1000043407 | Celesse Ltd. | GB-United Kingdom | Company | Yes | Alumnus | ESA BIC UK | |
| 1000035335 | Celestial Space Technologies GmbH | DE-Germany | Company | Yes | Alumnus | ESA BIC Bavaria | |
| 1000040241 | Cellgrid | DE-Germany | Company | No | Alumnus | ESA BIC North Rhine-Westphalia | |
| 1000042757 | Celtonn Limited | IE-Ireland | Company | Yes | Alumnus | ESA BIC Ireland | |
| 1000042438 | CELUS GmbH | DE-Germany | Company | No | Alumnus | ESA BIC Bavaria | |
| 1000034045 | Centrale Valutativa | IT-Italy | Company | No | Alumnus | ESA BIC Lazio | |
| 1000039469 | Cevotec GmbH | DE-Germany | Company | No | Alumnus | ESA BIC Bavaria | |