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.
replyVery interesting, thanks.
replyIt looks like he was an angel investor in Isar, and then co-founded a VC firm that continued to invest in Isar: https://alpinespace.vc/