I'm seeing reports that Khosla led a Series A round of $10 million at $0.22/share (http://www.cnbc.com/2015/11/09/square-ipo-will-net-big-win-f...). At a $40M valuation.
$40M/$0.22 = ~182 million shares at that point? So they've almost doubled the number of shares they started with if they're IPOing at 300 million shares. Does that sound like a reasonable bit of math?