I’m astounded he amassed $500+ million even before this. Loopt can’t have earned him more than one digit, are YC partners paid this well?
> Hydrazine bought out a portion of startup shares owned by Graham, a transaction that gave Altman stakes in some of the hottest companies backed by Y Combinator. The sale hasn’t been previously reported.
https://archive.is/x2hx4#selection-2672.0-2672.1
Depending on what companies and how much, that could have been an extraordinary windfall.
edit: I don't know the specifics of Altman's case.
Based on public reporting, Altman's wealth came from his family office piggybacking alongside YC versus his share of carry in YC's funds.
He sold Loopt for $40mm and then invested his share of that into start-ups like Stripe. (That investment alone should have taken him past $100mm.)