| 1000036800 | Arkadia Aerospace Propulsion & Transportation Systems SL | ES-Spain | Company | Yes | Alumnus | ESA BIC Valencia | |
| 1000040918 | ARKANE | FR-France | Company | Yes | Alumnus | ESA BIC Nord France | |
| 1000039298 | Armor Arsenal | FR-France | Company | Yes | Alumnus | ESA BIC Nord France | |
| 1000045324 | Arnell GmbH | DE-Germany | Company | No | Alumnus | ESA BIC Bavaria | |
| 1000044878 | Arrive Mobility UG (haftungsbeschränkt) & Co. KG | DE-Germany | Company | Yes | Alumnus | ESA BIC Baden-Württemberg | |
| 1000044109 | ART O.T.F. S.R.L. | IT-Italy | Company | No | Alumnus | ESA BIC Lazio | |
| 1000041421 | ARTI - Autonomous Robot Technology GmbH | AT-Austria | Company | Yes | Alumnus | ESA BIC Austria | |
| 1000042602 | Asana Cat UG (haftungsbeschränkt) | DE-Germany | Company | Yes | Alumnus | ESA BIC Hessen | |
| 1000046170 | Ascend Beyond Space | FR-France | Company | Yes | Alumnus | ESA BIC Sud France | |
| 1000042519 | Ascento AG | CH-Switzerland | Company | No | Alumnus | ESA BIC Switzerland | |
| 1000041393 | Ask Earth AG | CH-Switzerland | Company | Yes | Alumnus | ESA BIC Switzerland | |
| 1000041758 | Aspia Space Ltd | GB-United Kingdom | Company | Yes | Alumnus | ESA BIC UK | |
| 1000040694 | Astradyne SRL | IT-Italy | Company | Yes | Alumnus | ESA BIC Turin | |
| 1000020975 | ASTRIONICS GmbH | DE-Germany | Company | No | Alumnus | ESA BIC Bavaria | |
| 1000044330 | Astrofood | BE-Belgium | Company | Yes | Alumnus | ESA BIC Belgium | |
| 1000044309 | Astrolayers sp. z o.o. | PL-Poland | Company | Yes | Alumnus | ESA BIC Poland | |
| 1000039165 | Astron Systems Ltd | GB-United Kingdom | Company | Yes | Alumnus | ESA BIC UK | |
| 1000030745 | Astronautin GmbH | DE-Germany | Company | Yes | Alumnus | ESA BIC Northern Germany | |
| 1000042564 | Astrotectonic Ltd. | PL-Poland | Company | No | Alumnus | ESA BIC Poland | |
| 1000035927 | asvin | DE-Germany | Company | No | Alumnus | ESA BIC Baden-Württemberg | |