Spark Therapeutics nets $172mm in initial public offering

Gene therapy company Spark Therapeutics LLC netted $172mm in its initial public offering of 8.1mm shares (including the overallotment) for $23. Both the number of shares and price were upsized from planned terms: earlier this month Spark said it would sell 5.5mm shares for $15-17, and the company later amended that to 6.5mm shares at $19-21.