William Blair & Company’s Spark Therapeutics, Inc. Common Stock ONCE Stock Holding History

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Shares Change %	Capital Flow	Portfolio Weight	Portfolio Position
2018 Q4	–	Sell	-8,270	Closed	-$451K	–	1809
2018 Q3	$451K	Sell	8,270 -1,250	-13%	-$68.2K	﹤0.01%	991
2018 Q2	$788K	Buy	9,520 +230	+2%	+$19K	0.01%	808
2018 Q1	$619K	Buy	9,290 +4,350	+88%	+$290K	﹤0.01%	852
2017 Q4	$254K	Buy	+4,940	New	+$254K	﹤0.01%	1183