Dimensional Fund Advisors’s Biogen BIIB Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2026
Q1 | $198M | Buy |
1,079,119
+118,474
| +12% | +$21.8M | 0.04% | 588 |
|
|
2025
Q4 | $169M | Buy |
960,645
+87,551
| +10% | +$14.3M | 0.04% | 684 |
|
|
2025
Q3 | $122M | Sell |
873,094
-55,402
| -6% | -$7.49M | 0.03% | 903 |
|
|
2025
Q2 | $117M | Sell |
928,496
-58,223
| -6% | -$7.25M | 0.03% | 886 |
|
|
2025
Q1 | $135M | Sell |
986,719
-35,305
| -3% | -$5.05M | 0.03% | 736 |
|
|
2024
Q4 | $156M | Sell |
1,022,024
-92,316
| -8% | -$15.6M | 0.04% | 653 |
|
|
2024
Q3 | $216M | Buy |
1,114,340
+4,228
| +0.4% | +$885K | 0.05% | 444 |
|
|
2024
Q2 | $257M | Sell |
1,110,112
-210,874
| -16% | -$45.8M | 0.07% | 318 |
|
|
2024
Q1 | $285M | Sell |
1,320,986
-103,673
| -7% | -$24.3M | 0.08% | 253 |
|
|
2023
Q4 | $369M | Buy |
1,424,659
+43,444
| +3% | +$10.7M | 0.11% | 147 |
|
|
2023
Q3 | $355M | Buy |
1,381,215
+35,473
| +3% | +$9.49M | 0.12% | 136 |
|
|
2023
Q2 | $383M | Sell |
1,345,742
-70,779
| -5% | -$21.1M | 0.12% | 133 |
|
|
2023
Q1 | $394M | Buy |
1,416,521
+73,289
| +5% | +$20.3M | 0.13% | 118 |
|
|
2022
Q4 | $372K | Sell |
1,343,232
-19,821
| -1% | -$5.6M | 0.11% | 125 |
|
|
2022
Q3 | $364M | Buy |
1,363,053
+112,599
| +9% | +$23.9M | 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% | +$9.3M | 0.08% | 258 |
|
|
2021
Q4 | $286M | Buy |
1,192,250
+62,060
| +5% | +$16M | 0.09% | 213 |
|
|
2021
Q3 | $320M | Sell |
1,130,190
-57,498
| -5% | -$18.8M | 0.1% | 163 |
|
|
2021
Q2 | $411M | Buy |
1,187,688
+75,020
| +7% | +$22.7M | 0.13% | 108 |
|
|
2021
Q1 | $311M | Sell |
1,112,668
-3,883
| -0.3% | -$1.05M | 0.1% | 160 |
|
|
2020
Q4 | $273M | Buy |
1,116,551
+38,870
| +4% | +$10M | 0.1% | 158 |
|
|
2020
Q3 | $306M | Buy |
1,077,681
+10,176
| +1% | +$2.84M | 0.13% | 107 |
|
|
2020
Q2 | $285M | Buy |
1,067,505
+108,516
| +11% | +$32.6M | 0.13% | 108 |
|
|
2020
Q1 | $303M | Buy |
958,989
+123,667
| +15% | +$37.5M | 0.16% | 80 |
|
|
2019
Q4 | $248M | Buy |
835,322
+147,300
| +21% | +$40.9M | 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% | +$8.13M | 0.06% | 344 |
|
|
2019
Q1 | $152M | Sell |
642,119
-357
| -0.1% | -$112K | 0.06% | 347 |
|
|
2018
Q4 | $193M | Buy |
642,476
+12,226
| +2% | +$3.9M | 0.09% | 183 |
|
|
2018
Q3 | $223M | Sell |
630,250
-1,043
| -0.2% | -$359K | 0.08% | 196 |
|
|
2018
Q2 | $183M | Buy |
631,293
+16,288
| +3% | +$4.58M | 0.07% | 256 |
|
|
2018
Q1 | $168M | Buy |
615,005
+49,309
| +9% | +$15.3M | 0.07% | 290 |
|
|
2017
Q4 | $180M | Buy |
565,696
+38,365
| +7% | +$12.3M | 0.07% | 265 |
|
|
2017
Q3 | $165M | Buy |
527,331
+8,704
| +2% | +$2.58M | 0.07% | 288 |
|
|
2017
Q2 | $141M | Sell |
518,627
-1,219
| -0.2% | -$322K | 0.07% | 335 |
|
|
2017
Q1 | $142M | Sell |
519,846
-11,856
| -2% | -$3.35M | 0.07% | 316 |
|
|
2016
Q4 | $151M | Buy |
531,702
+9,175
| +2% | +$2.72M | 0.08% | 286 |
|
|
2016
Q3 | $164M | Buy |
522,527
+7,959
| +2% | +$2.36M | 0.09% | 203 |
|
|
2016
Q2 | $124M | Buy |
514,568
+37,922
| +8% | +$9.99M | 0.07% | 292 |
|
|
2016
Q1 | $124M | Buy |
476,646
+57,998
| +14% | +$15.3M | 0.07% | 270 |
|
|
2015
Q4 | $128M | Buy |
418,648
+19,889
| +5% | +$5.72M | 0.08% | 246 |
|
|
2015
Q3 | $116M | Buy |
398,759
+26,456
| +7% | +$8.74M | 0.08% | 267 |
|
|
2015
Q2 | $150M | Buy |
372,303
+31,654
| +9% | +$12.7M | 0.09% | 205 |
|
|
2015
Q1 | $144M | Buy |
340,649
+10,033
| +3% | +$3.95M | 0.09% | 218 |
|
|
2014
Q4 | $112M | Buy |
330,616
+29,200
| +10% | +$9.45M | 0.07% | 287 |
|
|
2014
Q3 | $99.7M | Buy |
301,416
+23,137
| +8% | +$7.63M | 0.07% | 299 |
|
|
2014
Q2 | $87.8M | Buy |
278,279
+9,065
| +3% | +$2.73M | 0.06% | 366 |
|
|
2014
Q1 | $82.4M | Buy |
269,214
+20,325
| +8% | +$6.45M | 0.06% | 356 |
|
|
2013
Q4 | $69.6M | Buy |
248,889
+1,749
| +0.7% | +$452K | 0.05% | 425 |
|
|
2013
Q3 | $59.5M | Buy |
247,140
+7,175
| +3% | +$1.61M | 0.05% | 441 |
|
|
2013
Q2 | $51.6M | Buy |
+239,965
| New | +$51.3M | 0.05% | 472 |
|
Other funds holding BIIB
VCM
VPM
Dimensional Fund Advisors's BIIB Position: Q1 2026 in Review
Dimensional Fund Advisors increased its Biogen (BIIB) stake by 12% in Q1 2026, buying an estimated $21.8M and bringing the position to 1,079,119 shares worth $198M. The position accounts for 0.04% of the portfolio, ranked #588.
Dimensional Fund Advisors first reported a position in BIIB in Q2 2013 and has held it in 52 quarters since. The position peaked at $411M in Q2 2021. 1,002 funds tracked by Wall St. Rank hold BIIB as of Q1 2026.
- Dimensional Fund Advisors held 1,079,119 shares of Biogen worth $198M as of Q1 2026.
- Dimensional Fund Advisors bought 118,474 Biogen shares in Q1 2026, an estimated $21.8M.
- Biogen made up 0.04% of Dimensional Fund Advisors's portfolio in Q1 2026, its #588 holding.
- Dimensional Fund Advisors first reported a position in Biogen in Q2 2013 and has held it in 52 quarters since.
- Dimensional Fund Advisors's Biogen position peaked at $411M in Q2 2021.
- 1,002 funds tracked by Wall St. Rank held Biogen as of Q1 2026.
Based on Dimensional Fund Advisors's 13F filing for Q1 2026, filed 7 May 2026.