Baker Bros. Advisors’s Achillion Pharmaceuticals, Inc. ACHN Stock Holding History

Quarter	Market Value	Status	Shares	Shares Change %	Trade Value	Portfolio Weight	Portfolio Position
2019 Q4	–	Sell	-1,095,359	Closed	-$3.94M	–	113
2019 Q3	$3.94M	Hold	1,095,359	–	–	0.03%	69
2019 Q2	$2.94M	Hold	1,095,359	–	–	0.02%	73
2019 Q1	$3.24M	Hold	1,095,359	–	–	0.02%	69
2018 Q4	$1.74M	Sell	1,095,359 -544,589	-33%	-$866K	0.01%	77
2018 Q3	$6.04M	Sell	1,639,948 -303,672	-16%	-$1.12M	0.04%	66
2018 Q2	$5.5M	Sell	1,943,620 -913,017	-32%	-$2.58M	0.04%	71
2018 Q1	$10.6M	Hold	2,856,637	–	–	0.09%	56
2017 Q4	$8.23M	Buy	2,856,637 +1,000,000	+54%	+$2.88M	0.07%	62
2017 Q3	$8.34M	Hold	1,856,637	–	–	0.07%	58
2017 Q2	$8.52M	Hold	1,856,637	–	–	0.07%	52
2017 Q1	$7.82M	Hold	1,856,637	–	–	0.06%	54
2016 Q4	$7.67M	Sell	1,856,637 -618,878	-25%	-$2.56M	0.08%	54
2016 Q3	$20.1M	Hold	2,475,515	–	–	0.18%	33
2016 Q2	$19.3M	Hold	2,475,515	–	–	0.2%	34
2016 Q1	$19.1M	Buy	2,475,515 +475,515	+24%	+$3.67M	0.2%	34
2015 Q4	$21.6M	Hold	2,000,000	–	–	0.18%	40
2015 Q3	$13.8M	Buy	2,000,000 +476,261	+31%	+$3.29M	0.13%	54
2015 Q2	$13.5M	Buy	1,523,739 +1,309,502	+611%	+$11.6M	0.12%	56
2015 Q1	$2.11M	Sell	214,237 -224,100	-51%	-$2.21M	0.02%	103
2014 Q4	$5.37M	Hold	438,337	–	–	0.05%	70
2014 Q3	$4.38M	Hold	438,337	–	–	0.06%	65
2014 Q2	$3.32M	Hold	438,337	–	–	0.04%	80
2014 Q1	$1.44M	Sell	438,337 -16,663	-4%	-$54.8K	0.02%	93
2013 Q4	$1.51M	Hold	455,000	–	–	0.02%	83
2013 Q3	$1.37M	Hold	455,000	–	–	0.02%	74
2013 Q2	$3.72M	Buy	+455,000	New	+$3.72M	0.07%	51