| 1000031755 | AT Space GmbH | AT-Austria | Company | No | Alumnus | ESA BIC Austria | |
| 1000037990 | Atheras Analytics | GB-United Kingdom | Company | Yes | Alumnus | ESA BIC UK | |
| 1000037196 | Atla.ai | DK-Denmark | Company | No | Alumnus | ESA BIC Denmark | |
| 1000040048 | ATLANT 3D Nanosystems | DK-Denmark | Company | No | Alumnus | ESA BIC Denmark | |
| 1000037018 | Atlas Aero GmbH | DE-Germany | Company | No | Alumnus | ESA BIC Bavaria | |
| 1000038858 | Atmos Space Cargo GmbH | DE-Germany | Company | Yes | Alumnus | ESA BIC Baden Württemberg | |
| 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 | |
| 1000040165 | Beetle ForTech | AT-Austria | Company | No | Incubatee | ESA BIC Austria | |
| 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 | |