Notion, a startup that is notoriously shy about taking venture capital, just raised funds at a $2 billion valuation. The deal terms were good news for early investors, who put in only a small amount of money for their ownership stake. The company sold off only 2% of total ownership. The existing shares are less diluted than is typical at a late-stage startup. It means that, in the event of a sale or an IPO, early investors in Notion could see unparalleled returns. Visit Business Insider's homepage for more stories.