| 1000012370 | ATMOSPHERE GMBH | DE-Germany | Company | No | Alumnus | ESA BIC Bavaria | |
| 1000034325 | Auravant | ES-Spain | Company | No | Alumnus | ESA BIC Madrid Region | |
| 1000031985 | AURORA PROPULSION TECHNOLOGIES OY | FI-Finland | Company | Yes | Alumnus | ESA BIC Finland | |
| 1000028988 | AVIONTEK GMBH | DE-Germany | Company | No | Alumnus | ESA BIC Bavaria | |
| 1000035458 | Avoin | FI-Finland | Company | Yes | Alumnus | ESA BIC Finland | |
| 1000035399 | AWAKE.AI | FI-Finland | Company | Yes | Alumnus | ESA BIC Finland | |
| 1000033765 | Benenati & Edwards GbR | DE-Germany | Company | No | Alumnus | ESA BIC Baden Württemberg | |
| 1000030473 | Big Terra Alpha | CZ-Czech Republic | Company | Yes | Alumnus | ESA BIC Czech Republic | |
| 1000039610 | Bitrezus P.C. | GR-Greece | Company | Yes | Alumnus | ESA BIC Greece | |
| 1000033967 | Black Engine Aerospace GmbH | DE-Germany | Company | No | Alumnus | ESA BIC Baden Württemberg | |
| 1000039625 | Blackpin GmbH | DE-Germany | Company | No | Alumnus | ESA BIC Baden Württemberg | |
| 1000027748 | Blackwave GmbH | DE-Germany | Company | No | Alumnus | ESA BIC Bavaria | |
| 1000017739 | BLUE THREAD SRL | IT-Italy | Company | No | Alumnus | ESA BIC Lazio | |
| 1000019227 | BLUECOVER TECHNOLOGIES, LDA | PT-Portugal | Company | No | Alumnus | ESA BIC Portugal | |
| 1000037258 | boltzplatz - numerical plasma dynamics GmbH | DE-Germany | Company | Yes | Alumnus | ESA BIC Baden Württemberg | |
| 1000021469 | B-OPEN SOLUTIONS SRL | IT-Italy | Company | Yes | Alumnus | ESA BIC Lazio | |
| 1000032681 | Boscalia Technologies, S.L | ES-Spain | Company | No | Alumnus | ESA BIC Madrid Region | |
| 1000039381 | Bota Systems AG | CH-Switzerland | Company | No | Alumnus | ESA BIC Switzerland | |
| 1000026569 | Cadami GmbH | DE-Germany | Company | Yes | Alumnus | ESA BIC Bavaria | |
| 1000041164 | CAIUS E.E. | GR-Greece | Company | Yes | Alumnus | ESA BIC Greece | |