A.R.T. Advisors’s Hudson Technologies HDSN Stock Holding History

Quarter	Market Value	Status	Shares	Shares Change %	Trade Value	Portfolio Weight	Portfolio Position
2015 Q2	–	Sell	-13,544	Closed	-$56K	–	1564
2015 Q1	$56K	Buy	13,544 +1,550	+13%	+$6.41K	﹤0.01%	1356
2014 Q4	$45K	Buy	+11,994	New	+$45K	﹤0.01%	1350