Rock Springs Capital Management’s Tetraphase Pharmaceuticals, Inc. TTPH Stock Holding History

Quarter	Market Value	Status	Shares	Shares Change %	Trade Value	Portfolio Weight	Portfolio Position
2018 Q1	–	Sell	-950,000	Closed	-$5.99M	–	161
2017 Q4	$5.99M	Hold	950,000	–	–	0.27%	100
2017 Q3	$6.5M	Buy	950,000 +252,000	+36%	+$1.72M	0.3%	95
2017 Q2	$4.98M	Hold	698,000	–	–	0.25%	98
2017 Q1	$6.42M	Hold	698,000	–	–	0.37%	76
2016 Q4	$2.81M	Buy	698,000 +35,500	+5%	+$143K	0.19%	101
2016 Q3	$2.54M	Buy	662,500 +237,500	+56%	+$909K	0.16%	114
2016 Q2	$1.83M	Buy	425,000 +25,000	+6%	+$108K	0.14%	116
2016 Q1	$1.85M	Buy	400,000 +200,000	+100%	+$926K	0.16%	115
2015 Q4	$2.01M	Buy	+200,000	New	+$2.01M	0.15%	109
2015 Q3	–	Sell	-43,000	Closed	-$2.04M	–	129
2015 Q2	$2.04M	Sell	43,000 -59,500	-58%	-$2.82M	0.15%	109
2015 Q1	$3.76M	Buy	+102,500	New	+$3.76M	0.35%	85