It might interest folks to learn:
> Incidentally, the early investment for Isar came from Bülent Altan, the Turkish ex-SpaceX guy who was in charge of the guidance system for Falcon-1, Falcon-9 and Dragon. [0]
It turns out that Altan was an angel investor in Isar, and then co-founded VC firm Alpine Space Ventures [1] and continued to invest in Isar, among other space ventures in Europe.