Spark, planning to trade on the Nasdaq under "ONCE," expects to price 5.5 million shares at between $15 and $17 each, laying out an additional 825,000 shares for its underwriters to cover overallotments. If everything goes as well as possible, the biotech will gross $107.5 million in the process, bankrolling its work on a portfolio of one-time treatments for rare diseases.
Spark, a 2014 Fierce 15 honoree, has raised more than $100 million in venture cash and collaboration revenue within about a year. And, with IPO proceeds estimated at about $78.8 million, the biotech believes it's poised to play a lead role in gene therapy's recent renaissance.