The Russian state owned the controlling interest in Gazprom.
from their website....
Gazprom is the largest supplier of natural gas in the world, accounting for approximately 15 percent of world gas production. It was established as a joint stock company in 1993, and is partly owned by the Russian state (50.002 percent).
are you saying Putin sold his interest to Germany?
No, I’m saying Germany seized Gazprom’s share.