Very sad. Jack was a very rich man, but not nearly as rich as he could have been...and I mean that as a compliment. He extolled the virtue of being an “average investor” and lived what he preached. He profoundly changed the personal investigation landscape.
In an industry that is, to put it charitably, not focused on its customers' best interests, he put the customer first. Eventually Vanguard got so dominant other firms had to dramatically cut their own expenses. He kept tens, perhaps hundreds, of billions of dollars in the hands of investors and changed his industry for the better. Let's hope it's permanent.
My quick google search had his net worth at $80M. Vanguard has just over $5 TRILLION assets under management. $80M is nothing to slouch at, but Jack invented an entirely new form of investing and could have easily been a multi-billionaire. I’m grateful for his foresight. He’s saved personal investors millions of dollars in fees over his career.