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Spark Therapeutics, Inc. (ONCE) Yearly Returns

Year	Beginning Price	Ending Price	Gain or Loss	Percent Gain or Loss
2016	45.31	49.90	4.59	10.13%
2017	49.90	51.42	1.52	3.05%
2018	51.42	39.14	-12.28	-23.88%
2019	39.14	113.57	74.43	190.16%
2020	113.57	114.50*	0.93	0.82%

*In 2020, Spark Therapeutics (ONCE) was acquired by Roche Group for $114.50 per share.

Calculations do not reflect any dividends paid or any stock spinoffs from original stock. Taxes and commissions are not factored into calculations. Data is property of 1stock1 and written permission must be granted before redistributing any data (in part or in whole).

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