California State Teachers Retirement System (CalSTRS)’s Biogen BIIB Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Shares Change % | Capital Flow | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2025
Q2 | $30M | Buy |
238,691
+8,156
| +4% | +$1.02M | 0.03% | 409 |
|
|
2025
Q1 | $31.5M | Sell |
230,535
-2,783
| -1% | -$381K | 0.04% | 377 |
|
|
2024
Q4 | $35.7M | Buy |
233,318
+2,811
| +1% | +$430K | 0.04% | 355 |
|
|
2024
Q3 | $44.7M | Sell |
230,507
-428
| -0.2% | -$83K | 0.05% | 317 |
|
|
2024
Q2 | $53.5M | Buy |
230,935
+3,863
| +2% | +$896K | 0.07% | 275 |
|
|
2024
Q1 | $49M | Buy |
227,072
+650
| +0.3% | +$140K | 0.06% | 290 |
|
|
2023
Q4 | $58.6M | Buy |
226,422
+89
| +0% | +$23K | 0.08% | 235 |
|
|
2023
Q3 | $58.2M | Sell |
226,333
-7,220
| -3% | -$1.86M | 0.09% | 209 |
|
|
2023
Q2 | $66.5M | Sell |
233,553
-14,231
| -6% | -$4.05M | 0.09% | 197 |
|
|
2023
Q1 | $68.9M | Sell |
247,784
-3,738
| -1% | -$1.04M | 0.1% | 185 |
|
|
2022
Q4 | $69.7M | Buy |
251,522
+1,384
| +0.6% | +$383K | 0.11% | 181 |
|
|
2022
Q3 | $66.8M | Sell |
250,138
-1,924
| -0.8% | -$514K | 0.11% | 171 |
|
|
2022
Q2 | $51.4M | Sell |
252,062
-4,681
| -2% | -$955K | 0.08% | 230 |
|
|
2022
Q1 | $54.1M | Sell |
256,743
-17,102
| -6% | -$3.6M | 0.07% | 258 |
|
|
2021
Q4 | $65.7M | Buy |
273,845
+7,466
| +3% | +$1.79M | 0.08% | 239 |
|
|
2021
Q3 | $75.4M | Buy |
266,379
+2,137
| +0.8% | +$605K | 0.1% | 187 |
|
|
2021
Q2 | $91.5M | Sell |
264,242
-30,775
| -10% | -$10.7M | 0.11% | 155 |
|
|
2021
Q1 | $82.5M | Sell |
295,017
-1,489
| -0.5% | -$417K | 0.11% | 157 |
|
|
2020
Q4 | $72.6M | Sell |
296,506
-39,337
| -12% | -$9.63M | 0.1% | 167 |
|
|
2020
Q3 | $95.3M | Sell |
335,843
-20,466
| -6% | -$5.81M | 0.15% | 120 |
|
|
2020
Q2 | $95.3M | Sell |
356,309
-19,486
| -5% | -$5.21M | 0.17% | 111 |
|
|
2020
Q1 | $119M | Sell |
375,795
-14,354
| -4% | -$4.54M | 0.26% | 73 |
|
|
2019
Q4 | $116M | Buy |
390,149
+51,682
| +15% | +$15.3M | 0.2% | 95 |
|
|
2019
Q3 | $78.8M | Sell |
338,467
-12,443
| -4% | -$2.9M | 0.15% | 131 |
|
|
2019
Q2 | $82.1M | Buy |
350,910
+1,012
| +0.3% | +$237K | 0.16% | 118 |
|
|
2019
Q1 | $82.7M | Buy |
349,898
+2,388
| +0.7% | +$564K | 0.17% | 112 |
|
|
2018
Q4 | $105M | Buy |
347,510
+21,342
| +7% | +$6.42M | 0.24% | 80 |
|
|
2018
Q3 | $115M | Sell |
326,168
-14,802
| -4% | -$5.23M | 0.22% | 80 |
|
|
2018
Q2 | $99M | Sell |
340,970
-298
| -0.1% | -$86.5K | 0.21% | 88 |
|
|
2018
Q1 | $93.4M | Sell |
341,268
-11,551
| -3% | -$3.16M | 0.2% | 97 |
|
|
2017
Q4 | $112M | Sell |
352,819
-5,241
| -1% | -$1.67M | 0.23% | 84 |
|
|
2017
Q3 | $112M | Sell |
358,060
-34,074
| -9% | -$10.7M | 0.25% | 82 |
|
|
2017
Q2 | $106M | Sell |
392,134
-43,827
| -10% | -$11.9M | 0.23% | 87 |
|
|
2017
Q1 | $119M | Sell |
435,961
-20,000
| -4% | -$5.47M | 0.24% | 83 |
|
|
2016
Q4 | $129M | Sell |
455,961
-12,200
| -3% | -$3.46M | 0.26% | 73 |
|
|
2016
Q3 | $147M | Buy |
468,161
+3,900
| +0.8% | +$1.22M | 0.3% | 59 |
|
|
2016
Q2 | $112M | Sell |
464,261
-9,316
| -2% | -$2.25M | 0.24% | 81 |
|
|
2016
Q1 | $123M | Buy |
473,577
+60,510
| +15% | +$15.8M | 0.26% | 73 |
|
|
2015
Q4 | $127M | Sell |
413,067
-15,850
| -4% | -$4.86M | 0.31% | 61 |
|
|
2015
Q3 | $125M | Sell |
428,917
-700
| -0.2% | -$204K | 0.33% | 58 |
|
|
2015
Q2 | $174M | Sell |
429,617
-4,990
| -1% | -$2.02M | 0.42% | 44 |
|
|
2015
Q1 | $184M | Sell |
434,607
-7,500
| -2% | -$3.17M | 0.43% | 43 |
|
|
2014
Q4 | $150M | Buy |
442,107
+4,172
| +1% | +$1.42M | 0.35% | 50 |
|
|
2014
Q3 | $145M | Buy |
437,935
+4,486
| +1% | +$1.48M | 0.36% | 48 |
|
|
2014
Q2 | $137M | Buy |
433,449
+1,600
| +0.4% | +$504K | 0.34% | 49 |
|
|
2014
Q1 | $132M | Buy |
431,849
+2,100
| +0.5% | +$642K | 0.35% | 52 |
|
|
2013
Q4 | $120M | Buy |
429,749
+2,900
| +0.7% | +$811K | 0.33% | 55 |
|
|
2013
Q3 | $103M | Buy |
426,849
+13,205
| +3% | +$3.18M | 0.31% | 59 |
|
|
2013
Q2 | $89M | Buy |
+413,644
| New | +$89M | 0.29% | 61 |
|