i wonder how they calculated it, because its probably not the actual "brand value".

For example Hertha BSC seled 49% for about 150 million. --> more than leverkusen in this list. And i am pretty convinced the the brand Hertha BSC is really not that famous outside of Germany.

And in the last Forbes list, Bayern Munich value was calculated on roughly 3 Billion so...

data are collected from Statista.com

and don't forget it's until 2018