I link to one specific class of examples here in this comment -- https://news.ycombinator.com/item?id=20763618 https://news.ycombinator.com/item?id=20763618 Th

I link to one specific class of examples here in this comment -- https://news.ycombinator.com/item?id=20763618 https://news.ycombinator.com/item?id=20763618 This happens well before a company is acquired though (it happens when investors put in money into a company and negotiate their way into getting paid out first).