FinancingsAcceleron Pharma Inc. has filed for an initial public offering (IPO) that aims to raise about $74.7 million.Apexigen Inc. raised $20 million in a Series A1 financing to advance its cancer therapy, APX005.Engene Inc. completed an initial closing of a $13.25 million financing led by Lumira Capital.Intrexon Corp. priced its IPO of about 10 million shares at $16 apiece.