A.R.T. Advisors’s Natural Gas Services Group NGS Stock Holding History

Quarter	Market Value	Status	Shares	Shares Change %	Trade Value	Portfolio Weight	Portfolio Position
2016 Q3	–	Sell	-8,866	Closed	-$203K	–	986
2016 Q2	$203K	Buy	+8,866	New	+$203K	0.01%	1104
2014 Q3	–	Sell	-8,168	Closed	-$270K	–	1452
2014 Q2	$270K	Buy	+8,168	New	+$270K	0.01%	1023