Parallax Volatility Advisers
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Parallax Volatility Advisers’s Biogen BIIB Stock Holding History

Quarter Market Value Status Shares Shares
Change %
Trade Value Portfolio Weight Portfolio Position
2025
Q1
Sell
-13,690
Closed -$2.09M 586
2024
Q4
$2.09M Sell
13,690
-698
-5% -$107K ﹤0.01% 270
2024
Q3
$2.79M Buy
14,388
+122
+0.9% +$23.6K 0.01% 218
2024
Q2
$3.31M Buy
+14,266
New +$3.31M 0.01% 193
2023
Q4
Sell
-24,775
Closed -$6.37M 684
2023
Q3
$6.37M Buy
24,775
+9,864
+66% +$2.54M 0.01% 107
2023
Q2
$4.25M Buy
+14,911
New +$4.25M 0.01% 145
2023
Q1
Hold
0
951
2022
Q4
Hold
0
980
2022
Q3
Hold
0
1077
2022
Q2
Sell
-22,926
Closed -$4.83M 1064
2022
Q1
$4.83M Buy
+22,926
New +$4.83M ﹤0.01% 174
2020
Q4
Sell
-15,584
Closed -$4.42M 970
2020
Q3
$4.42M Sell
15,584
-3,062
-16% -$869K ﹤0.01% 335
2020
Q2
$4.99M Buy
18,646
+11,239
+152% +$3.01M 0.01% 248
2020
Q1
$2.34M Buy
7,407
+5,389
+267% +$1.7M ﹤0.01% 349
2019
Q4
$599K Sell
2,018
-23,259
-92% -$6.9M ﹤0.01% 492
2019
Q3
$5.89M Buy
25,277
+23,747
+1,552% +$5.53M 0.01% 154
2019
Q2
$358K Sell
1,530
-1,210
-44% -$283K ﹤0.01% 473
2019
Q1
$648K Sell
2,740
-11,582
-81% -$2.74M ﹤0.01% 376
2018
Q4
$4.31M Buy
14,322
+5,122
+56% +$1.54M 0.01% 165
2018
Q3
$3.25M Buy
9,200
+6,088
+196% +$2.15M ﹤0.01% 158
2018
Q2
$903K Sell
3,112
-4,351
-58% -$1.26M ﹤0.01% 282
2018
Q1
$2.04M Sell
7,463
-6,277
-46% -$1.72M ﹤0.01% 170
2017
Q4
$4.38M Buy
13,740
+6,680
+95% +$2.13M 0.01% 128
2017
Q3
$2.21M Sell
7,060
-9,532
-57% -$2.99M ﹤0.01% 144
2017
Q2
$4.5M Sell
16,592
-10,317
-38% -$2.8M 0.01% 105
2017
Q1
$7.36M Sell
26,909
-3,456
-11% -$945K 0.02% 61
2016
Q4
$8.61M Buy
+30,365
New +$8.61M 0.02% 69
2016
Q3
Hold
0
869
2016
Q2
Sell
-5,154
Closed -$1.34M 731
2016
Q1
$1.34M Buy
+5,154
New +$1.34M ﹤0.01% 156
2015
Q4
Sell
-7,613
Closed -$2.22M 919
2015
Q3
$2.22M Buy
+7,613
New +$2.22M ﹤0.01% 188
2015
Q2
Sell
-47,089
Closed -$19.9M 1250
2015
Q1
$19.9M Buy
47,089
+41,909
+809% +$17.7M 0.05% 42
2014
Q4
$1.76M Buy
5,180
+4,636
+852% +$1.57M 0.01% 267
2014
Q3
$180K Buy
544
+507
+1,370% +$168K ﹤0.01% 641
2014
Q2
$12K Sell
37
-28,115
-100% -$9.12M ﹤0.01% 1134
2014
Q1
$8.61M Buy
28,152
+14,414
+105% +$4.41M 0.05% 40
2013
Q4
$3.84M Buy
+13,738
New +$3.84M 0.02% 100
2013
Q3
Hold
0
994
2013
Q2
Hold
0
850