Conkwest filed for a IPO friday. Far cry away from 4 Billion looks like there will be more to come in the near future. http://www.nasdaq.com/article/natural-born-cancer-killers-conkwest-files-for-a-173-million-ipo-cm488975 http://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001326110&owner=include&count=40