ONCE - Spark Therapeutics, Inc.

NasdaqGS - NasdaqGS Real Time Price. Currency in USD

Major Holders

Currency in USD

Top Institutional Holders

HolderSharesDate Reported% OutValue
Vanguard Group, Inc. (The)3,237,616Sep 29, 20198.40%313,983,999
Blackrock Inc.2,869,885Sep 29, 20197.45%278,321,447
Pentwater Capital Management Lp2,103,545Sep 29, 20195.46%204,001,794
Boxer Capital, LLC1,650,000Sep 29, 20194.28%160,017,000
Paulson & Company, Inc.1,437,666Sep 29, 20193.73%139,424,848
State Street Corporation1,324,061Sep 29, 20193.44%128,407,435
Casdin Capital, LLC863,300Sep 29, 20192.24%83,722,834
CNH Partners LLC857,478Sep 29, 20192.23%83,158,216
Alpine Associates Management Inc.808,900Sep 29, 20192.10%78,447,122
Magnetar Financial LLC782,108Sep 29, 20192.03%75,848,833

Top Mutual Fund Holders

HolderSharesDate Reported% OutValue
Federated Kaufmann Fund1,069,500Mar 30, 20192.78%121,794,660
Vanguard Total Stock Market Index Fund927,618Jun 29, 20192.41%94,969,530
Vanguard Small-Cap Index Fund883,923Jun 29, 20192.29%90,496,036
iShares Russell 2000 ETF775,315Sep 29, 20192.01%75,190,048
SPDR (R) Ser Tr-SPDR (R) S&P (R) Biotech ETF601,003Sep 29, 20191.56%58,285,270
Vanguard Small-Cap Growth Index Fund506,602Jun 29, 20191.32%51,865,912
Vanguard Extended Market Index Fund456,862Jun 29, 20191.19%46,773,531
IndexIQ Tr-IQ Merger Arbitrage ETF417,350Sep 29, 20191.08%40,474,603
iShares NASDAQ Biotechnology ETF379,124Sep 29, 20190.98%36,767,445
Federated Kaufmann Small Cap Fund327,800Mar 30, 20190.85%37,329,864