This article suggests that he and JL were half of a self-funded YC that took 6% of each company they funded. The YC portfolio is estimated at $300 billion from

This article suggests that he and JL were half of a self-funded YC that took 6% of each company they funded. The YC portfolio is estimated at $300 billion from a random article I just Googled. 3% of that would be nine billion, assuming all four YC founders had equal shares and disregarding dilution as the portfolio companies took on more investors. Likely off by an order of magnitude in one direction or the other but still fair bit higher than 50 million.