Ritter Sport is german family-owned chocolate company with long history. Would be interesting to get to know more about it.
Also, Faber-Castell is a company that makes pens and pencils and it is one of the largest in the world.
In general, the topic of german “Mittelstand companies” which is a big part of German economy.
Small to medium companies, but highly succesful on the market.
And topic about differences between family-owned and corporate business structures.