| 1000047724 | Konree Innovation Ltd. | IE-Ireland | Company | No | Incubatee | ESA BIC Ireland | |
| 1000049157 | Koordinat ApS | DK-Denmark | Company | No | Incubatee | ESA BIC Denmark | |
| 1000044162 | KoraLabs GmbH | CH-Switzerland | Company | No | Alumnus | ESA BIC Switzerland | |
| 1000046391 | KOTA Sp. z.o.o | PL-Poland | Company | No | Alumnus | ESA BIC Poland | |
| 1000037331 | KrattWorks Ltd | EE-Estonia | Company | No | Alumnus | ESA BIC Estonia | |
| 1000039773 | KURS ORBITAL S.R.L. | IT-Italy | Company | No | Alumnus | ESA BIC Turin | |
| 1000033566 | KUUB3 | BE-Belgium | Company | No | Alumnus | ESA BIC Belgium | |
| 1000050971 | Laelaps AI Ltd | GB-United Kingdom | Company | No | Incubatee | ESA BIC UK | |
| 1000048817 | Lagertha LTD | IE-Ireland | Company | No | Incubatee | ESA BIC Ireland | |
| 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 | |
| 1000041359 | LEAGUES GmbH | DE-Germany | Company | No | Alumnus | ESA BIC Baden-Württemberg | |
| 1000044907 | LEAM Technologies GmbH | DE-Germany | Company | No | Alumnus | ESA BIC Bavaria | |
| 1000045668 | Lederer Peter Dipl.-Ing. | AT-Austria | Company | No | Alumnus | ESA BIC Austria | |
| 1000042393 | lemvos GmbH | DE-Germany | Company | No | Alumnus | ESA BIC Bavaria | |
| 1000042667 | LEOBLUE | FR-France | Company | No | Alumnus | ESA BIC Sud France | |
| 1000032288 | Let's Earth s.r.o. | CZ-Czech Republic | Company | No | Alumnus | ESA BIC Czech Republic | |
| 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 | |