Primecap Management’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 | $2.71B | Sell |
14,757,607
-390
| -0% | -$71.9K | 2.13% | 10 |
|
|
2025
Q4 | $2.6B | Sell |
14,757,997
-196,700
| -1% | -$32.1M | 1.97% | 14 |
|
|
2025
Q3 | $2.09B | Sell |
14,954,697
-847,425
| -5% | -$115M | 1.6% | 16 |
|
|
2025
Q2 | $1.98B | Sell |
15,802,122
-141,137
| -0.9% | -$17.6M | 1.57% | 15 |
|
|
2025
Q1 | $2.18B | Sell |
15,943,259
-102,950
| -0.6% | -$14.7M | 1.8% | 14 |
|
|
2024
Q4 | $2.45B | Sell |
16,046,209
-268,870
| -2% | -$45.3M | 1.9% | 13 |
|
|
2024
Q3 | $3.16B | Sell |
16,315,079
-23,215
| -0.1% | -$4.86M | 2.33% | 9 |
|
|
2024
Q2 | $3.79B | Buy |
16,338,294
+117,578
| +0.7% | +$25.6M | 2.74% | 7 |
|
|
2024
Q1 | $3.5B | Sell |
16,220,716
-43,765
| -0.3% | -$10.2M | 2.61% | 7 |
|
|
2023
Q4 | $4.21B | Buy |
16,264,481
+251,915
| +2% | +$61.9M | 3.33% | 2 |
|
|
2023
Q3 | $4.12B | Sell |
16,012,566
-13,310
| -0.1% | -$3.56M | 3.47% | 2 |
|
|
2023
Q2 | $4.56B | Buy |
16,025,876
+24,710
| +0.2% | +$7.36M | 3.81% | 2 |
|
|
2023
Q1 | $4.45B | Buy |
16,001,166
+300,590
| +2% | +$83.2M | 3.88% | 2 |
|
|
2022
Q4 | $4.35B | Sell |
15,700,576
-41,139
| -0.3% | -$11.6M | 3.98% | 2 |
|
|
2022
Q3 | $4.2B | Buy |
15,741,715
+15,189
| +0.1% | +$3.23M | 4.07% | 2 |
|
|
2022
Q2 | $3.21B | Sell |
15,726,526
-108,080
| -0.7% | -$22.1M | 2.87% | 4 |
|
|
2022
Q1 | $3.33B | Buy |
15,834,606
+77,201
| +0.5% | +$16.8M | 2.52% | 5 |
|
|
2021
Q4 | $3.78B | Sell |
15,757,405
-501,510
| -3% | -$129M | 2.62% | 4 |
|
|
2021
Q3 | $4.6B | Sell |
16,258,915
-199,591
| -1% | -$65.4M | 3.25% | 3 |
|
|
2021
Q2 | $5.7B | Sell |
16,458,506
-299,750
| -2% | -$90.8M | 3.83% | 2 |
|
|
2021
Q1 | $4.69B | Buy |
16,758,256
+936,190
| +6% | +$252M | 3.27% | 2 |
|
|
2020
Q4 | $3.87B | Buy |
15,822,066
+125,362
| +0.8% | +$32.3M | 2.88% | 5 |
|
|
2020
Q3 | $4.45B | Buy |
15,696,704
+64,772
| +0.4% | +$18.1M | 3.67% | 4 |
|
|
2020
Q2 | $4.18B | Sell |
15,631,932
-334,057
| -2% | -$100M | 3.59% | 5 |
|
|
2020
Q1 | $5.05B | Buy |
15,965,989
+776,508
| +5% | +$236M | 4.95% | 2 |
|
|
2019
Q4 | $4.51B | Buy |
15,189,481
+929,469
| +7% | +$258M | 3.27% | 4 |
|
|
2019
Q3 | $3.32B | Sell |
14,260,012
-293,990
| -2% | -$68.5M | 2.66% | 7 |
|
|
2019
Q2 | $3.4B | Sell |
14,554,002
-32,380
| -0.2% | -$7.48M | 2.52% | 7 |
|
|
2019
Q1 | $3.45B | Sell |
14,586,382
-129,835
| -0.9% | -$40.9M | 2.54% | 7 |
|
|
2018
Q4 | $4.43B | Sell |
14,716,217
-157,579
| -1% | -$50.3M | 3.59% | 3 |
|
|
2018
Q3 | $5.26B | Sell |
14,873,796
-48,140
| -0.3% | -$16.6M | 3.55% | 3 |
|
|
2018
Q2 | $4.33B | Sell |
14,921,936
-31,295
| -0.2% | -$8.8M | 3.21% | 3 |
|
|
2018
Q1 | $4.09B | Sell |
14,953,231
-156,000
| -1% | -$48.4M | 3.07% | 3 |
|
|
2017
Q4 | $4.81B | Sell |
15,109,231
-103,683
| -0.7% | -$33.3M | 3.69% | 1 |
|
|
2017
Q3 | $4.76B | Sell |
15,212,914
-178,487
| -1% | -$52.9M | 3.94% | 1 |
|
|
2017
Q2 | $4.18B | Sell |
15,391,401
-86,023
| -0.6% | -$22.7M | 3.59% | 3 |
|
|
2017
Q1 | $4.23B | Sell |
15,477,424
-106,963
| -0.7% | -$30.2M | 3.84% | 2 |
|
|
2016
Q4 | $4.42B | Sell |
15,584,387
-109,518
| -0.7% | -$32.5M | 4.35% | 1 |
|
|
2016
Q3 | $4.91B | Sell |
15,693,905
-330,956
| -2% | -$98M | 4.9% | 1 |
|
|
2016
Q2 | $3.88B | Sell |
16,024,861
-221,865
| -1% | -$58.5M | 4.13% | 3 |
|
|
2016
Q1 | $4.23B | Buy |
16,246,726
+436,101
| +3% | +$115M | 4.39% | 2 |
|
|
2015
Q4 | $4.84B | Sell |
15,810,625
-32,835
| -0.2% | -$9.44M | 4.95% | 2 |
|
|
2015
Q3 | $4.62B | Sell |
15,843,460
-658,081
| -4% | -$217M | 5.13% | 2 |
|
|
2015
Q2 | $6.67B | Sell |
16,501,541
-57,222
| -0.3% | -$23M | 6.56% | 1 |
|
|
2015
Q1 | $6.99B | Sell |
16,558,763
-611,930
| -4% | -$241M | 6.83% | 1 |
|
|
2014
Q4 | $5.83B | Sell |
17,170,693
-45,938
| -0.3% | -$14.9M | 5.91% | 1 |
|
|
2014
Q3 | $5.7B | Sell |
17,216,631
-41,680
| -0.2% | -$13.7M | 6.09% | 1 |
|
|
2014
Q2 | $5.44B | Sell |
17,258,311
-243,795
| -1% | -$73.4M | 5.96% | 1 |
|
|
2014
Q1 | $5.35B | Sell |
17,502,106
-275,496
| -2% | -$87.5M | 6.06% | 1 |
|
|
2013
Q4 | $4.97B | Sell |
17,777,602
-190,570
| -1% | -$49.3M | 5.97% | 1 |
|
|
2013
Q3 | $4.33B | Sell |
17,968,172
-278,637
| -2% | -$62.4M | 5.69% | 1 |
|
|
2013
Q2 | $3.93B | Buy |
+18,246,809
| New | +$3.9B | 5.62% | 1 |
|
Other funds holding BIIB
VCM
VPM
