| 1000025804 | Lacuna Space Ltd | GB-United Kingdom | Company | Yes | Alumnus | ESA BIC UK | |
| 1000043799 | Lamb Space Tec GmbH | DE-Germany | Company | No | Alumnus | ESA BIC North Rhine-Westphalia | |
| 1000032433 | Lanterne LTD | GB-United Kingdom | Company | No | Alumnus | ESA BIC UK | |
| 1000043896 | LaterationXYZ GmbH | DE-Germany | Company | No | Alumnus | ESA BIC Baden-Württemberg | |
| 1000041078 | LATITUDE | FR-France | Company | Yes | Alumnus | ESA BIC Nord France | |
| 1000032536 | Latitudo40 S.r.l. | IT-Italy | Company | Yes | Alumnus | ESA BIC Lazio | |
| 1000047918 | LAUNCHERSCANNER SRL | IT-Italy | Company | Yes | Alumnus | ESA BIC Turin | |
| 1000041359 | LEAGUES GmbH | DE-Germany | Company | No | Alumnus | ESA BIC Baden-Württemberg | |
| 1000044907 | LEAM Technologies GmbH | DE-Germany | Company | No | Alumnus | ESA BIC Bavaria | |
| 1000042717 | Leasi AS | NO-Norway | Company | Yes | Alumnus | ESA BIC Norway | |
| 1000045668 | Lederer Peter Dipl.-Ing. | AT-Austria | Company | No | Alumnus | ESA BIC Austria | |
| 1000046242 | leitspalt GmbH | DE-Germany | Company | Yes | Alumnus | ESA BIC North Rhine-Westphalia | |
| 1000042393 | lemvos GmbH | DE-Germany | Company | No | Alumnus | ESA BIC Bavaria | |
| 1000042667 | LEOBLUE | FR-France | Company | No | Alumnus | ESA BIC Sud France | |
| 1000043583 | LETO SPACE GmbH | AT-Austria | Company | Yes | Alumnus | ESA BIC Austria | |
| 1000032288 | Let's Earth s.r.o. | CZ-Czech Republic | Company | No | Alumnus | ESA BIC Czech Republic | |
| 1000048539 | LEVEL ELEVEN STUDIO, MB | LT-Lithuania | Company | Yes | Alumnus | ESA BIC Lithuania | |
| 1000042122 | levelQuantum s.r.l. | IT-Italy | Company | No | Alumnus | ESA BIC Turin | |
| 1000037874 | LEVITY UG (limited liability) | DE-Germany | Company | No | Alumnus | ESA BIC Northern Germany | |
| 1000041807 | LIDAX ELECTRO-OPTICAL SYSTEMS S.L. | ES-Spain | Company | No | Alumnus | ESA BIC Madrid Region | |