EcoR1 Capital’s Spark Therapeutics, Inc. Common Stock ONCE Stock Holding History

EcoR1 Capital’s Portfolio ONCE Stock Details ONCE Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2019 Q4	–	Sell	-714,789	Closed	-$69.3M	–	56
2019 Q3	$69.3M	Buy	714,789 +100,661	+16%	+$10.1M	8.75%	3
2019 Q2	$62.9M	Buy	614,128 +85,128	+16%	+$9.19M	6.35%	6
2019 Q1	$60.2M	Sell	529,000 -607,851	-53%	-$44.7M	5.55%	6
2018 Q4	$44.5M	Buy	1,136,851 +299,803	+36%	+$13M	4.45%	6
2018 Q3	$45.7M	Buy	+837,048	New	+$57.2M	4.11%	8
2016 Q4	–	Sell	-68,600	Closed	-$4.12M	–	40
2016 Q3	$4.12M	Buy	+68,600	New	+$3.95M	1.26%	22
2016 Q2	–	Sell	-8,700	Closed	-$257K	–	41
2016 Q1	$257K	Buy	+8,700	New	+$274K	0.09%	36

EcoR1 Capital's ONCE Position: Q4 2019 in Review

EcoR1 Capital sold out of Spark Therapeutics, Inc. Common Stock (ONCE) in Q4 2019, closing a stake of 714,789 shares — an estimated $69.3M sold.

EcoR1 Capital first reported a position in ONCE in Q1 2016 and held it in 7 quarters. The position peaked at $69.3M in Q3 2019. 0 funds tracked by Wall St. Rank hold ONCE as of Q4 2019.

EcoR1 Capital reported no remaining Spark Therapeutics, Inc. Common Stock position as of Q4 2019 after selling out during the quarter.
EcoR1 Capital sold 714,789 Spark Therapeutics, Inc. Common Stock shares in Q4 2019, an estimated $69.3M.
EcoR1 Capital first reported a position in Spark Therapeutics, Inc. Common Stock in Q1 2016 and held it in 7 quarters.
EcoR1 Capital's Spark Therapeutics, Inc. Common Stock position peaked at $69.3M in Q3 2019.
0 funds tracked by Wall St. Rank held Spark Therapeutics, Inc. Common Stock as of Q4 2019.

Based on EcoR1 Capital's 13F filing for Q4 2019, filed 14 Feb 2020.