New York State Teachers Retirement System (NYSTRS)’s Biogen BIIB Stock Holding History

Bought
Maintained
Sold
Quarter Market Value Status Shares Shares
Change %
Capital Flow Portfolio Weight Portfolio Position
2025
Q2
$13.9M Buy
110,649
+2,973
+3% +$373K 0.03% 430
2025
Q1
$14.7M Sell
107,676
-3,452
-3% -$472K 0.03% 395
2024
Q4
$17M Sell
111,128
-6,673
-6% -$1.02M 0.04% 370
2024
Q3
$22.8M Sell
117,801
-5,534
-4% -$1.07M 0.05% 319
2024
Q2
$28.6M Sell
123,335
-3,484
-3% -$808K 0.06% 266
2024
Q1
$27.3M Sell
126,819
-8,630
-6% -$1.86M 0.06% 286
2023
Q4
$35.1M Sell
135,449
-7,609
-5% -$1.97M 0.08% 226
2023
Q3
$36.8M Sell
143,058
-11,131
-7% -$2.86M 0.09% 207
2023
Q2
$43.9M Sell
154,189
-7,902
-5% -$2.25M 0.1% 183
2023
Q1
$45.1M Sell
162,091
-1,607
-1% -$447K 0.11% 181
2022
Q4
$45.3M Buy
163,698
+801
+0.5% +$222K 0.11% 176
2022
Q3
$43.5M Buy
162,897
+2,085
+1% +$557K 0.11% 167
2022
Q2
$32.8M Sell
160,812
-3,995
-2% -$815K 0.08% 231
2022
Q1
$34.7M Sell
164,807
-11,306
-6% -$2.38M 0.07% 249
2021
Q4
$42.3M Sell
176,113
-7,010
-4% -$1.68M 0.08% 222
2021
Q3
$51.8M Sell
183,123
-6,285
-3% -$1.78M 0.11% 169
2021
Q2
$65.6M Sell
189,408
-11,632
-6% -$4.03M 0.14% 139
2021
Q1
$56.2M Sell
201,040
-30,041
-13% -$8.4M 0.12% 153
2020
Q4
$56.6M Sell
231,081
-17,683
-7% -$4.33M 0.12% 147
2020
Q3
$70.6M Sell
248,764
-19,871
-7% -$5.64M 0.17% 117
2020
Q2
$71.9M Sell
268,635
-24,294
-8% -$6.5M 0.18% 112
2020
Q1
$92.7M Sell
292,929
-12,000
-4% -$3.8M 0.28% 72
2019
Q4
$90.5M Sell
304,929
-6,900
-2% -$2.05M 0.21% 99
2019
Q3
$72.6M Sell
311,829
-829
-0.3% -$193K 0.18% 112
2019
Q2
$73.1M Sell
312,658
-18,057
-5% -$4.22M 0.19% 113
2019
Q1
$78.2M Buy
330,715
+1,227
+0.4% +$290K 0.2% 105
2018
Q4
$99.2M Sell
329,488
-17,093
-5% -$5.14M 0.28% 74
2018
Q3
$122M Sell
346,581
-11,850
-3% -$4.19M 0.29% 73
2018
Q2
$104M Sell
358,431
-10,310
-3% -$2.99M 0.25% 78
2018
Q1
$101M Sell
368,741
-4,779
-1% -$1.31M 0.25% 84
2017
Q4
$119M Sell
373,520
-2,900
-0.8% -$924K 0.28% 76
2017
Q3
$118M Sell
376,420
-7,954
-2% -$2.49M 0.29% 72
2017
Q2
$104M Sell
384,374
-5,970
-2% -$1.62M 0.27% 80
2017
Q1
$107M Sell
390,344
-12,971
-3% -$3.55M 0.27% 75
2016
Q4
$114M Sell
403,315
-4,861
-1% -$1.38M 0.3% 70
2016
Q3
$128M Sell
408,176
-22,788
-5% -$7.13M 0.34% 57
2016
Q2
$104M Sell
430,964
-3,526
-0.8% -$853K 0.27% 80
2016
Q1
$113M Sell
434,490
-821
-0.2% -$214K 0.3% 68
2015
Q4
$133M Sell
435,311
-15,780
-3% -$4.83M 0.35% 60
2015
Q3
$132M Sell
451,091
-2,012
-0.4% -$587K 0.37% 58
2015
Q2
$183M Sell
453,103
-2,880
-0.6% -$1.16M 0.48% 43
2015
Q1
$193M Sell
455,983
-4,600
-1% -$1.94M 0.49% 42
2014
Q4
$156M Sell
460,583
-7,997
-2% -$2.71M 0.4% 52
2014
Q3
$155M Sell
468,580
-1,005
-0.2% -$332K 0.41% 48
2014
Q2
$148M Sell
469,585
-15,434
-3% -$4.87M 0.38% 52
2014
Q1
$148M Buy
485,019
+15,768
+3% +$4.82M 0.39% 53
2013
Q4
$131M Sell
469,251
-17,061
-4% -$4.77M 0.34% 60
2013
Q3
$117M Sell
486,312
-6,867
-1% -$1.65M 0.32% 63
2013
Q2
$106M Buy
+493,179
New +$106M 0.3% 71