I had to dig a little bit to verify, but Duvel bought back their shares and left the Euronext back in 2013, making them once again family-owned. Even when they were publicly traded, only ~25% of their value was actually available for purchase as shares. The odd part is that it used to be listed on the Wikipedia entry. That's the only reason I knew it to be the case. Not sure why something like that would have been removed.