Berkshire Asset Management’s Biogen BIIB Stock Holding History

Bought
Maintained
Sold
Quarter Market Value Status Shares Shares
Change %
Capital Flow Portfolio Weight Portfolio Position
2025
Q1
Sell
-1,568
Closed -$229K 283
2024
Q4
$229K Sell
1,568
-461
-23% -$67.4K 0.01% 258
2024
Q3
$470K Hold
2,029
0.02% 190
2024
Q2
$470K Sell
2,029
-38
-2% -$8.81K 0.02% 191
2024
Q1
$446K Sell
2,067
-10
-0.5% -$2.16K 0.02% 172
2023
Q4
$537K Sell
2,077
-33
-2% -$8.54K 0.03% 147
2023
Q3
$542K Sell
2,110
-94
-4% -$24.2K 0.03% 141
2023
Q2
$628K Sell
2,204
-325
-13% -$92.6K 0.04% 131
2023
Q1
$703K Buy
+2,529
New +$703K 0.04% 127
2022
Q4
Sell
-2,352
Closed -$628K 150
2022
Q3
$628K Sell
2,352
-445
-16% -$119K 0.04% 125
2022
Q2
$570K Sell
2,797
-825
-23% -$168K 0.04% 132
2022
Q1
$763K Buy
3,622
+60
+2% +$12.6K 0.05% 110
2021
Q4
$855K Sell
3,562
-1,928
-35% -$463K 0.05% 127
2021
Q3
$1.55M Sell
5,490
-78
-1% -$22.1K 0.1% 100
2021
Q2
$1.93M Sell
5,568
-285
-5% -$98.7K 0.13% 87
2021
Q1
$1.64M Buy
5,853
+341
+6% +$95.4K 0.12% 87
2020
Q4
$1.35M Buy
5,512
+3,331
+153% +$816K 0.1% 98
2020
Q3
$619K Sell
2,181
-112
-5% -$31.8K 0.06% 107
2020
Q2
$613K Sell
2,293
-3,141
-58% -$840K 0.06% 106
2020
Q1
$1.72M Buy
5,434
+3,210
+144% +$1.02M 0.18% 70
2019
Q4
$660K Buy
2,224
+67
+3% +$19.9K 0.06% 112
2019
Q3
$502K Sell
2,157
-113
-5% -$26.3K 0.04% 138
2019
Q2
$531K Buy
2,270
+258
+13% +$60.4K 0.04% 131
2019
Q1
$476K Buy
2,012
+10
+0.5% +$2.37K 0.04% 147
2018
Q4
$602K Sell
2,002
-145
-7% -$43.6K 0.06% 129
2018
Q3
$759K Buy
2,147
+12
+0.6% +$4.24K 0.06% 125
2018
Q2
$620K Buy
2,135
+329
+18% +$95.5K 0.06% 126
2018
Q1
$495K Sell
1,806
-64
-3% -$17.5K 0.05% 138
2017
Q4
$596K Buy
1,870
+28
+2% +$8.92K 0.06% 127
2017
Q3
$577K Sell
1,842
-125
-6% -$39.2K 0.06% 117
2017
Q2
$534K Sell
1,967
-230
-10% -$62.4K 0.06% 121
2017
Q1
$601K Buy
2,197
+189
+9% +$51.7K 0.07% 115
2016
Q4
$569K Sell
2,008
-328
-14% -$92.9K 0.07% 114
2016
Q3
$731K Sell
2,336
-1,427
-38% -$447K 0.11% 102
2016
Q2
$910K Buy
3,763
+799
+27% +$193K 0.14% 90
2016
Q1
$772K Buy
2,964
+68
+2% +$17.7K 0.12% 89
2015
Q4
$887K Buy
2,896
+150
+5% +$45.9K 0.15% 86
2015
Q3
$801K Buy
2,746
+869
+46% +$253K 0.14% 89
2015
Q2
$758K Sell
1,877
-33
-2% -$13.3K 0.13% 93
2015
Q1
$806K Sell
1,910
-266
-12% -$112K 0.13% 92
2014
Q4
$739K Buy
2,176
+43
+2% +$14.6K 0.13% 94
2014
Q3
$706K Hold
2,133
0.13% 96
2014
Q2
$673K Hold
2,133
0.12% 94
2014
Q1
$652K Sell
2,133
-3,935
-65% -$1.2M 0.13% 91
2013
Q4
$1.7M Buy
6,068
+850
+16% +$238K 0.32% 66
2013
Q3
$1.26M Buy
5,218
+3,505
+205% +$844K 0.3% 73
2013
Q2
$369K Buy
+1,713
New +$369K 0.1% 95