Teacher Retirement System of Texas’s Biogen BIIB Stock Holding History

Bought
Maintained
Sold
Quarter Market Value Status Shares Shares
Change %
Capital Flow Portfolio Weight Portfolio Position
2025
Q2
$5.15M Buy
40,975
+1,103
+3% +$139K 0.02% 553
2025
Q1
$5.46M Sell
39,872
-12,285
-24% -$1.68M 0.02% 506
2024
Q4
$7.98M Buy
52,157
+12,765
+32% +$1.95M 0.03% 391
2024
Q3
$7.64M Buy
39,392
+5,555
+16% +$1.08M 0.04% 388
2024
Q2
$7.84M Buy
33,837
+891
+3% +$207K 0.04% 324
2024
Q1
$7.1M Sell
32,946
-924
-3% -$199K 0.05% 335
2023
Q4
$8.77M Sell
33,870
-4,442
-12% -$1.15M 0.06% 306
2023
Q3
$9.85M Buy
38,312
+694
+2% +$178K 0.07% 296
2023
Q2
$10.7M Buy
37,618
+3,923
+12% +$1.12M 0.07% 280
2023
Q1
$9.37M Sell
33,695
-29,374
-47% -$8.17M 0.06% 314
2022
Q4
$17.5M Buy
63,069
+40,391
+178% +$11.2M 0.13% 186
2022
Q3
$6.06M Sell
22,678
-7,889
-26% -$2.11M 0.04% 371
2022
Q2
$6.23M Sell
30,567
-7,610
-20% -$1.55M 0.04% 399
2022
Q1
$8.04M Buy
38,177
+9,428
+33% +$1.99M 0.04% 410
2021
Q4
$6.9M Buy
28,749
+1,082
+4% +$260K 0.03% 456
2021
Q3
$7.83M Sell
27,667
-21,837
-44% -$6.18M 0.04% 399
2021
Q2
$17.1M Buy
49,504
+1,118
+2% +$387K 0.09% 254
2021
Q1
$13.5M Buy
48,386
+17,093
+55% +$4.78M 0.08% 279
2020
Q4
$7.66M Sell
31,293
-129,837
-81% -$31.8M 0.05% 370
2020
Q3
$45.7M Buy
161,130
+19,366
+14% +$5.49M 0.3% 83
2020
Q2
$37.9M Buy
141,764
+31,551
+29% +$8.44M 0.31% 80
2020
Q1
$34.9M Sell
110,213
-108,705
-50% -$34.4M 0.37% 65
2019
Q4
$65M Buy
218,918
+92,935
+74% +$27.6M 0.51% 48
2019
Q3
$29.3M Buy
125,983
+21,232
+20% +$4.94M 0.26% 121
2019
Q2
$24.5M Sell
104,751
-1,976
-2% -$462K 0.2% 161
2019
Q1
$25.2M Buy
106,727
+24,093
+29% +$5.7M 0.22% 142
2018
Q4
$24.9M Sell
82,634
-9,087
-10% -$2.73M 0.23% 135
2018
Q3
$32.4M Sell
91,721
-27,293
-23% -$9.64M 0.23% 128
2018
Q2
$34.5M Buy
119,014
+40,411
+51% +$11.7M 0.22% 110
2018
Q1
$21.5M Buy
78,603
+19,301
+33% +$5.28M 0.14% 179
2017
Q4
$18.9M Sell
59,302
-127,378
-68% -$40.6M 0.13% 194
2017
Q3
$58.5M Sell
186,680
-22,190
-11% -$6.95M 0.36% 77
2017
Q2
$56.7M Sell
208,870
-508
-0.2% -$138K 0.39% 75
2017
Q1
$57.2M Sell
209,378
-7,584
-3% -$2.07M 0.41% 68
2016
Q4
$61.5M Sell
216,962
-10,890
-5% -$3.09M 0.44% 63
2016
Q3
$71.3M Sell
227,852
-4,920
-2% -$1.54M 0.5% 53
2016
Q2
$56.3M Sell
232,772
-31,509
-12% -$7.62M 0.38% 68
2016
Q1
$68.8M Buy
264,281
+38,702
+17% +$10.1M 0.46% 54
2015
Q4
$69.1M Sell
225,579
-6,995
-3% -$2.14M 0.5% 56
2015
Q3
$67.9M Buy
232,574
+61,961
+36% +$18.1M 0.53% 55
2015
Q2
$68.9M Buy
170,613
+159,871
+1,488% +$64.6M 0.52% 57
2015
Q1
$4.54M Sell
10,742
-5,774
-35% -$2.44M 0.04% 241
2014
Q4
$5.61M Buy
16,516
+6,966
+73% +$2.36M 0.04% 192
2014
Q3
$3.16M Buy
9,550
+2,970
+45% +$982K 0.03% 274
2014
Q2
$2.08M Buy
6,580
+2,532
+63% +$798K 0.02% 315
2014
Q1
$1.24M Sell
4,048
-186
-4% -$56.9K 0.01% 362
2013
Q4
$1.18M Sell
4,234
-4,502
-52% -$1.26M 0.01% 361
2013
Q3
$2.1M Buy
8,736
+1,191
+16% +$287K 0.02% 335
2013
Q2
$1.62M Buy
+7,545
New +$1.62M 0.01% 358