William Blair Investment Management’s Biogen BIIB Stock Holding History

Bought
Maintained
Sold
Quarter Market Value Status Shares Shares
Change %
Capital Flow Portfolio Weight Portfolio Position
2019
Q1
Sell
-28,149
Closed -$8.47M 409
2018
Q4
$8.47M Sell
28,149
-39,469
-58% -$11.9M 0.04% 319
2018
Q3
$23.9M Sell
67,618
-47,078
-41% -$16.6M 0.08% 210
2018
Q2
$33.3M Sell
114,696
-3,502
-3% -$1.02M 0.12% 177
2018
Q1
$32.4M Sell
118,198
-28,427
-19% -$7.78M 0.12% 174
2017
Q4
$46.7M Sell
146,625
-4,711
-3% -$1.5M 0.18% 148
2017
Q3
$47.4M Sell
151,336
-53,771
-26% -$16.8M 0.17% 151
2017
Q2
$55.7M Sell
205,107
-87,940
-30% -$23.9M 0.2% 129
2017
Q1
$80.1M Sell
293,047
-142,802
-33% -$39M 0.3% 105
2016
Q4
$124M Buy
435,849
+4,118
+1% +$1.17M 0.49% 69
2016
Q3
$135M Buy
431,731
+67,344
+18% +$21.1M 0.51% 64
2016
Q2
$88.1M Sell
364,387
-7,059
-2% -$1.71M 0.35% 96
2016
Q1
$96.7M Buy
371,446
+55,652
+18% +$14.5M 0.38% 90
2015
Q4
$96.7M Buy
315,794
+73,617
+30% +$22.6M 0.39% 90
2015
Q3
$70.7M Buy
+242,177
New +$70.7M 0.14% 213