| 1000035501 | Atlantic Spaceport Consortium, Lda | PT-Portugal | Company | Yes | Alumnus | ESA BIC Portugal | |
| 1000037018 | Atlas Aero GmbH | DE-Germany | Company | No | Alumnus | ESA BIC Bavaria | |
| 1000045235 | ATMAKE ADVANCED MANUFACTURING S.L. | ES-Spain | Company | Yes | Alumnus | ESA BIC Barcelona | |
| 1000038858 | Atmos Space Cargo GmbH | DE-Germany | Company | Yes | Alumnus | ESA BIC Baden-Württemberg | |
| 1000012370 | ATMOSPHERE GMBH | DE-Germany | Company | Yes | Alumnus | ESA BIC Bavaria | |
| 1000044894 | Augmenterra GmbH | AT-Austria | Company | No | Alumnus | ESA BIC Austria | |
| 1000034325 | Auravant | ES-Spain | Company | No | Alumnus | ESA BIC Madrid Region | |
| 1000042301 | Aurora Avionics Ltd | GB-United Kingdom | Company | Yes | Alumnus | ESA BIC UK | |
| 1000031985 | AURORA PROPULSION TECHNOLOGIES OY | FI-Finland | Company | Yes | Alumnus | ESA BIC Finland | |
| 1000030421 | AutoNaut Ltd | GB-United Kingdom | Company | No | Alumnus | ESA BIC UK | |
| 1000047995 | AUTONOMA PRIVATE COMPANY | GR-Greece | Company | Yes | Incubatee | ESA BIC Greece | |
| 1000049835 | autonomIQ technologies GmbH | DE-Germany | Company | No | Incubatee | ESA BIC Hessen | |
| 1000040985 | Auxsys GmbH | DE-Germany | Company | No | Alumnus | ESA BIC North Rhine-Westphalia | |
| 1000046093 | AUYAN SAS | FR-France | Company | Yes | Alumnus | ESA BIC Sud France | |
| 1000044014 | AVES Reality GmbH | DE-Germany | Company | Yes | Alumnus | ESA BIC Bavaria | |
| 1000048111 | Aviant AS | NO-Norway | Company | Yes | Incubatee | ESA BIC Norway | |
| 1000028988 | AVIONTEK GMBH | DE-Germany | Company | No | Alumnus | ESA BIC Bavaria | |
| 1000043777 | AviSense.AI technovlastos P.C. | GR-Greece | Company | Yes | Alumnus | ESA BIC Greece | |
| 1000035458 | Avoin | FI-Finland | Company | Yes | Alumnus | ESA BIC Finland | |
| 1000035399 | AWAKE.AI | FI-Finland | Company | Yes | Alumnus | ESA BIC Finland | |