State of Wisconsin Investment Board’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 | $14.4M | Buy |
78,564
+2,620
| +3% | +$483K | 0.03% | 487 |
|
|
2025
Q4 | $13.4M | Sell |
75,944
-1,955
| -3% | -$319K | 0.03% | 538 |
|
|
2025
Q3 | $10.9M | Sell |
77,899
-869
| -1% | -$117K | 0.03% | 600 |
|
|
2025
Q2 | $9.89M | Sell |
78,768
-9,808
| -11% | -$1.22M | 0.02% | 644 |
|
|
2025
Q1 | $12.1M | Buy |
88,576
+8,435
| +11% | +$1.21M | 0.03% | 526 |
|
|
2024
Q4 | $12.3M | Sell |
80,141
-12,825
| -14% | -$2.16M | 0.03% | 536 |
|
|
2024
Q3 | $18M | Buy |
92,966
+13,571
| +17% | +$2.84M | 0.05% | 386 |
|
|
2024
Q2 | $18.4M | Sell |
79,395
-9,168
| -10% | -$1.99M | 0.05% | 350 |
|
|
2024
Q1 | $19.1M | Buy |
88,563
+11,001
| +14% | +$2.58M | 0.05% | 355 |
|
|
2023
Q4 | $20.1M | Sell |
77,562
-3,729
| -5% | -$916K | 0.06% | 319 |
|
|
2023
Q3 | $20.9M | Sell |
81,291
-30,207
| -27% | -$8.08M | 0.07% | 284 |
|
|
2023
Q2 | $31.8M | Buy |
111,498
+12,677
| +13% | +$3.77M | 0.09% | 212 |
|
|
2023
Q1 | $27.5M | Buy |
98,821
+5,448
| +6% | +$1.51M | 0.08% | 242 |
|
|
2022
Q4 | $25.9M | Buy |
93,373
+380
| +0.4% | +$107K | 0.08% | 242 |
|
|
2022
Q3 | $24.8M | Sell |
92,993
-28,169
| -23% | -$5.98M | 0.08% | 252 |
|
|
2022
Q2 | $24.7M | Sell |
121,162
-7,506
| -6% | -$1.53M | 0.06% | 294 |
|
|
2022
Q1 | $27.1M | Sell |
128,668
-6,895
| -5% | -$1.5M | 0.06% | 339 |
|
|
2021
Q4 | $32.5M | Sell |
135,563
-19,549
| -13% | -$5.03M | 0.06% | 326 |
|
|
2021
Q3 | $43.9M | Sell |
155,112
-136,451
| -47% | -$44.7M | 0.09% | 242 |
|
|
2021
Q2 | $101M | Buy |
291,563
+140,375
| +93% | +$42.5M | 0.21% | 110 |
|
|
2021
Q1 | $42.3M | Sell |
151,188
-36,247
| -19% | -$9.78M | 0.09% | 251 |
|
|
2020
Q4 | $45.9M | Buy |
187,435
+68,634
| +58% | +$17.7M | 0.11% | 217 |
|
|
2020
Q3 | $33.7M | Buy |
118,801
+15,911
| +15% | +$4.44M | 0.08% | 244 |
|
|
2020
Q2 | $27.5M | Sell |
102,890
-5,439
| -5% | -$1.63M | 0.08% | 284 |
|
|
2020
Q1 | $34.3M | Sell |
108,329
-46,984
| -30% | -$14.3M | 0.11% | 193 |
|
|
2019
Q4 | $46.1M | Sell |
155,313
-28,708
| -16% | -$7.97M | 0.12% | 191 |
|
|
2019
Q3 | $42.8M | Sell |
184,021
-71,055
| -28% | -$16.5M | 0.12% | 192 |
|
|
2019
Q2 | $59.7M | Sell |
255,076
-37,708
| -13% | -$8.71M | 0.17% | 130 |
|
|
2019
Q1 | $69.2M | Sell |
292,784
-1,377
| -0.5% | -$434K | 0.2% | 105 |
|
|
2018
Q4 | $88.5M | Buy |
294,161
+25,310
| +9% | +$8.08M | 0.29% | 76 |
|
|
2018
Q3 | $95M | Sell |
268,851
-87,182
| -24% | -$30M | 0.26% | 82 |
|
|
2018
Q2 | $103M | Sell |
356,033
-14,214
| -4% | -$4M | 0.3% | 70 |
|
|
2018
Q1 | $101M | Buy |
370,247
+39,382
| +12% | +$12.2M | 0.29% | 76 |
|
|
2017
Q4 | $105M | Sell |
330,865
-17,395
| -5% | -$5.58M | 0.29% | 82 |
|
|
2017
Q3 | $109M | Buy |
348,260
+134,754
| +63% | +$39.9M | 0.32% | 69 |
|
|
2017
Q2 | $57.9M | Buy |
213,506
+27,710
| +15% | +$7.33M | 0.19% | 119 |
|
|
2017
Q1 | $50.8M | Sell |
185,796
-66,861
| -26% | -$18.9M | 0.2% | 115 |
|
|
2016
Q4 | $71.6M | Buy |
252,657
+24,156
| +11% | +$7.16M | 0.31% | 67 |
|
|
2016
Q3 | $71.5M | Buy |
228,501
+21,760
| +11% | +$6.44M | 0.28% | 69 |
|
|
2016
Q2 | $50M | Buy |
206,741
+33,750
| +20% | +$8.89M | 0.2% | 102 |
|
|
2016
Q1 | $45M | Sell |
172,991
-20,184
| -10% | -$5.33M | 0.18% | 118 |
|
|
2015
Q4 | $59.2M | Sell |
193,175
-27,090
| -12% | -$7.78M | 0.23% | 91 |
|
|
2015
Q3 | $64.3M | Buy |
220,265
+27,204
| +14% | +$8.98M | 0.25% | 77 |
|
|
2015
Q2 | $78M | Sell |
193,061
-23,275
| -11% | -$9.34M | 0.27% | 70 |
|
|
2015
Q1 | $91.3M | Sell |
216,336
-72,430
| -25% | -$28.5M | 0.32% | 62 |
|
|
2014
Q4 | $98M | Buy |
288,766
+60,810
| +27% | +$19.7M | 0.34% | 57 |
|
|
2014
Q3 | $75.4M | Sell |
227,956
-38,820
| -15% | -$12.8M | 0.27% | 73 |
|
|
2014
Q2 | $84.1M | Sell |
266,776
-11,543
| -4% | -$3.47M | 0.3% | 67 |
|
|
2014
Q1 | $85.1M | Buy |
278,319
+15,220
| +6% | +$4.83M | 0.32% | 54 |
|
|
2013
Q4 | $73.6M | Sell |
263,099
-55,933
| -18% | -$14.5M | 0.28% | 67 |
|
|
2013
Q3 | $76.8M | Sell |
319,032
-53,540
| -14% | -$12M | 0.32% | 56 |
|
|
2013
Q2 | $80.2M | Buy |
+372,572
| New | +$79.6M | 0.34% | 52 |
|
Other funds holding BIIB
VCM
VPM
State of Wisconsin Investment Board's BIIB Position: Q1 2026 in Review
State of Wisconsin Investment Board increased its Biogen (BIIB) stake by 3.4% in Q1 2026, buying an estimated $483K and bringing the position to 78,564 shares worth $14.4M. The position accounts for 0.03% of the portfolio, ranked #487.
State of Wisconsin Investment Board first reported a position in BIIB in Q2 2013 and has held it in 52 quarters since. The position peaked at $109M in Q3 2017. 1,005 funds tracked by Wall St. Rank hold BIIB as of Q1 2026.
- State of Wisconsin Investment Board held 78,564 shares of Biogen worth $14.4M as of Q1 2026.
- State of Wisconsin Investment Board bought 2,620 Biogen shares in Q1 2026, an estimated $483K.
- Biogen made up 0.03% of State of Wisconsin Investment Board's portfolio in Q1 2026, its #487 holding.
- State of Wisconsin Investment Board first reported a position in Biogen in Q2 2013 and has held it in 52 quarters since.
- State of Wisconsin Investment Board's Biogen position peaked at $109M in Q3 2017.
- 1,005 funds tracked by Wall St. Rank held Biogen as of Q1 2026.
Based on State of Wisconsin Investment Board's 13F filing for Q1 2026, filed 15 May 2026.