Magnetar Financial’s Biogen BIIB Stock Holding History

Quarter	Market Value	Status	Shares	Shares Change %	Trade Value	Portfolio Weight	Portfolio Position
2025 Q2	$312K	Sell	2,484 -5,235	-68%	-$657K	﹤0.01%	693
2025 Q1	$1.06M	Buy	7,719 +5,842	+311%	+$799K	0.01%	333
2024 Q4	$287K	Buy	1,877 +717	+62%	+$110K	0.01%	479
2024 Q3	$225K	Buy	+1,160	New	+$225K	﹤0.01%	448
2023 Q1	–	Sell	-1,337	Closed	-$370K	–	611
2022 Q4	$370K	Buy	+1,337	New	+$370K	0.01%	639
2022 Q3	–	Sell	-2,555	Closed	-$521	–	1359
2022 Q2	$521	Buy	+2,555	New	+$521	0.01%	1131
2022 Q1	–	Sell	-3,714	Closed	-$891K	–	1325
2021 Q4	$891K	Sell	3,714 -31,728	-90%	-$7.61M	0.01%	831
2021 Q3	$10M	Buy	35,442 +24,737	+231%	+$7M	0.1%	212
2021 Q2	$3.71K	Buy	10,705 +3,342	+45%	+$1.16K	0.04%	470
2021 Q1	$2.06M	Buy	+7,363	New	+$2.06M	0.02%	569
2020 Q3	–	Sell	-1,022	Closed	-$273K	–	644
2020 Q2	$273K	Buy	1,022 +382	+60%	+$102K	0.01%	347
2020 Q1	$202K	Sell	640 -769	-55%	-$243K	﹤0.01%	399
2019 Q4	$418K	Sell	1,409 -2,832	-67%	-$840K	0.01%	367
2019 Q3	$987K	Buy	4,241 +329	+8%	+$76.6K	0.03%	222
2019 Q2	$915K	Buy	+3,912	New	+$915K	0.02%	200
2018 Q3	–	Sell	-825	Closed	-$239K	–	523
2018 Q2	$239K	Buy	+825	New	+$239K	﹤0.01%	433
2018 Q1	–	Sell	-636	Closed	-$203K	–	575
2017 Q4	$203K	Buy	+636	New	+$203K	﹤0.01%	621
2017 Q2	–	Sell	-4,514	Closed	-$1.23M	–	779
2017 Q1	$1.23M	Buy	+4,514	New	+$1.23M	0.02%	251
2015 Q2	–	Sell	-5,229	Closed	-$2.21M	–	385
2015 Q1	$2.21M	Buy	+5,229	New	+$2.21M	0.04%	130
2014 Q1	–	Hold	0	–	–	–	111
2013 Q4	–	Hold	0	–	–	–	113
2013 Q3	–	Hold	0	–	–	–	297