A.R.T. Advisors’s Bio-Rad Laboratories Class A BIO Stock Holding History

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2020 Q1	–	Sell	-7,800	Closed	-$2.89M	–	160
2019 Q4	$2.89M	Buy	7,800 +6,200	+388%	+$2.19M	0.14%	187
2019 Q3	$532K	Buy	1,600 +500	+45%	+$163K	0.03%	833
2019 Q2	$344K	Sell	1,100 -8,200	-88%	-$2.46M	0.02%	896
2019 Q1	$2.84M	Buy	9,300 +5,300	+133%	+$1.43M	0.17%	151
2018 Q4	$929K	Sell	4,000 -6,000	-60%	-$1.61M	0.06%	466
2018 Q3	$3.13M	Buy	10,000 +7,000	+233%	+$2.17M	0.14%	188
2018 Q2	$865K	Sell	3,000 -800	-21%	-$221K	0.04%	698
2018 Q1	$950K	Buy	3,800 +2,000	+111%	+$509K	0.04%	685
2017 Q4	$429K	Sell	1,800 -400	-18%	-$96.9K	0.02%	958
2017 Q3	$488K	Sell	2,200 -3,900	-64%	-$878K	0.02%	836
2017 Q2	$1.38M	Sell	6,100 -9,300	-60%	-$2.03M	0.07%	381
2017 Q1	$3.07M	Buy	+15,400	New	+$2.97M	0.14%	194
2016 Q4	–	Sell	-2,400	Closed	-$393K	–	1281
2016 Q3	$393K	Buy	+2,400	New	+$364K	0.13%	249
2015 Q4	–	Sell	-5,498	Closed	-$738K	–	1466
2015 Q3	$738K	Sell	5,498 -2,986	-35%	-$430K	0.03%	735
2015 Q2	$1.28M	Buy	+8,484	New	+$1.21M	0.04%	630
2014 Q4	–	Sell	-6,758	Closed	-$766K	–	1423
2014 Q3	$766K	Sell	6,758 -2,043	-23%	-$242K	0.04%	592
2014 Q2	$1.05M	Buy	+8,801	New	+$1.07M	0.05%	487
2013 Q3	–	Sell	-2,169	Closed	-$243K	–	1305
2013 Q2	$243K	Buy	+2,169	New	+$254K	0.01%	1108