A.R.T. Advisors’s Whiting Petroleum Corporation WLL Stock Holding History

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2020 Q4	–	Sell	-15,714	Closed	-$272K	–	126
2020 Q3	$272K	Buy	15,714 +15,018	+2,158%	+$837K	1.54%	22
2020 Q2	$59K	Buy	+696	New	+$54.3K	0.09%	221
2018 Q4	–	Sell	-1,988	Closed	-$7.91M	–	1891
2018 Q3	$7.91M	Sell	1,988 -632	-24%	-$2.33M	0.36%	44
2018 Q2	$10.4M	Buy	2,620 +94	+4%	+$325K	0.42%	26
2018 Q1	$6.41M	Buy	2,526 +1,412	+127%	+$3.03M	0.26%	62
2017 Q4	$2.21M	Sell	1,114 -349	-24%	-$612K	0.1%	340
2017 Q3	$2.4M	Buy	1,463 +1,204	+465%	+$1.77M	0.12%	222
2017 Q2	$428K	Sell	259 -605	-70%	-$1.38M	0.02%	872
2017 Q1	$2.45M	Buy	864 +112	+15%	+$362K	0.11%	248
2016 Q4	$2.71M	Buy	752 +634	+537%	+$1.9M	0.16%	172
2016 Q3	$308K	Buy	+118	New	+$277K	0.1%	339
2015 Q1	–	Sell	-71	Closed	-$706K	–	1952
2014 Q4	$706K	Buy	+71	New	+$1.08M	0.03%	794
2014 Q3	–	Sell	-228	Closed	-$5.48M	–	1782
2014 Q2	$5.48M	Sell	228 -90	-28%	-$2M	0.29%	66
2014 Q1	$6.62M	Buy	318 +159	+100%	+$3.01M	0.35%	50
2013 Q4	$2.96M	Buy	+159	New	+$3.01M	0.16%	186