I imagine he still had 15%+ of the company, so if there was a big payout, he would've gotten a big slice. Treat all my estimates with a grain of salt, though, please. I'm imagining he didn't get a huge payout and he actually kept most of his equity?
Investors are being bought at 2.5B valuation
Base on those numbers, $150M of series A with 1B valuation would be bought now for 375M(which is high for failed startup), my understanding is that such transaction has to be disclosed.
I may be too skeptical, but it is just hard to believe someone (who?) throws 400M (to seed + A investors) plus significant amount to founders into essentially failed startup.