Dimensional Fund Advisors
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Dimensional Fund Advisors’s Biogen BIIB Stock Holding History

Quarter Market Value Status Shares Shares
Change %
Trade Value Portfolio Weight Portfolio Position
2025
Q2
$117M Sell
928,496
-58,223
-6% -$7.31M 0.03% 886
2025
Q1
$135M Sell
986,719
-35,305
-3% -$4.83M 0.03% 736
2024
Q4
$156M Sell
1,022,024
-92,316
-8% -$14.1M 0.04% 653
2024
Q3
$216M Buy
1,114,340
+4,228
+0.4% +$820K 0.05% 444
2024
Q2
$257M Sell
1,110,112
-210,874
-16% -$48.9M 0.07% 318
2024
Q1
$285M Sell
1,320,986
-103,673
-7% -$22.4M 0.08% 253
2023
Q4
$369M Buy
1,424,659
+43,444
+3% +$11.2M 0.11% 147
2023
Q3
$355M Buy
1,381,215
+35,473
+3% +$9.12M 0.12% 136
2023
Q2
$383M Sell
1,345,742
-70,779
-5% -$20.2M 0.12% 133
2023
Q1
$394M Buy
1,416,521
+73,289
+5% +$20.4M 0.13% 118
2022
Q4
$372K Sell
1,343,232
-19,821
-1% -$5.49K 0.11% 125
2022
Q3
$364M Buy
1,363,053
+112,599
+9% +$30.1M 0.14% 104
2022
Q2
$255M Buy
1,250,454
+15,431
+1% +$3.15M 0.09% 207
2022
Q1
$260M Buy
1,235,023
+42,773
+4% +$9.01M 0.08% 258
2021
Q4
$286M Buy
1,192,250
+62,060
+5% +$14.9M 0.09% 213
2021
Q3
$320M Sell
1,130,190
-57,498
-5% -$16.3M 0.1% 163
2021
Q2
$411M Buy
1,187,688
+75,020
+7% +$26M 0.13% 108
2021
Q1
$311M Sell
1,112,668
-3,883
-0.3% -$1.09M 0.1% 160
2020
Q4
$273M Buy
1,116,551
+38,870
+4% +$9.52M 0.1% 158
2020
Q3
$306M Buy
1,077,681
+10,176
+1% +$2.89M 0.13% 107
2020
Q2
$285M Buy
1,067,505
+108,516
+11% +$29M 0.13% 108
2020
Q1
$303M Buy
958,989
+123,667
+15% +$39.1M 0.16% 80
2019
Q4
$248M Buy
835,322
+147,300
+21% +$43.7M 0.09% 170
2019
Q3
$160M Buy
688,022
+10,697
+2% +$2.49M 0.06% 345
2019
Q2
$159M Buy
677,325
+35,206
+5% +$8.24M 0.06% 344
2019
Q1
$152M Sell
642,119
-357
-0.1% -$84.4K 0.06% 347
2018
Q4
$193M Buy
642,476
+12,226
+2% +$3.68M 0.09% 183
2018
Q3
$223M Sell
630,250
-1,043
-0.2% -$369K 0.08% 196
2018
Q2
$183M Buy
631,293
+16,288
+3% +$4.73M 0.07% 256
2018
Q1
$168M Buy
615,005
+49,309
+9% +$13.5M 0.07% 290
2017
Q4
$180M Buy
565,696
+38,365
+7% +$12.2M 0.07% 265
2017
Q3
$165M Buy
527,331
+8,704
+2% +$2.73M 0.07% 288
2017
Q2
$141M Sell
518,627
-1,219
-0.2% -$331K 0.07% 335
2017
Q1
$142M Sell
519,846
-11,856
-2% -$3.24M 0.07% 316
2016
Q4
$151M Buy
531,702
+9,175
+2% +$2.6M 0.08% 286
2016
Q3
$164M Buy
522,527
+7,959
+2% +$2.49M 0.09% 203
2016
Q2
$124M Buy
514,568
+37,922
+8% +$9.17M 0.07% 292
2016
Q1
$124M Buy
476,646
+57,998
+14% +$15.1M 0.07% 270
2015
Q4
$128M Buy
418,648
+19,889
+5% +$6.09M 0.08% 246
2015
Q3
$116M Buy
398,759
+26,456
+7% +$7.72M 0.08% 267
2015
Q2
$150M Buy
372,303
+31,654
+9% +$12.8M 0.09% 205
2015
Q1
$144M Buy
340,649
+10,033
+3% +$4.24M 0.09% 218
2014
Q4
$112M Buy
330,616
+29,200
+10% +$9.91M 0.07% 287
2014
Q3
$99.7M Buy
301,416
+23,137
+8% +$7.65M 0.07% 299
2014
Q2
$87.8M Buy
278,279
+9,065
+3% +$2.86M 0.06% 366
2014
Q1
$82.4M Buy
269,214
+20,325
+8% +$6.22M 0.06% 356
2013
Q4
$69.6M Buy
248,889
+1,749
+0.7% +$489K 0.05% 425
2013
Q3
$59.5M Buy
247,140
+7,175
+3% +$1.73M 0.05% 441
2013
Q2
$51.6M Buy
+239,965
New +$51.6M 0.05% 472