SC 13D/A

Spark Therapeutics, Inc.

Security class unavailable · CUSIP: 84652J103

Event date: 2017-05-11

Legacy cover-page extraction is best effort and may not include every reporting person.

Filing-level shares

4,998,910

Percent of class

16.0000%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.