Jane Street’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 | $31.5M | Sell |
171,700
-18,200
| -10% | -$3.35M | ﹤0.01% | 1399 |
|
|
2025
Q4 | $33.4M | Sell |
189,900
-17,800
| -9% | -$2.91M | 0.01% | 1181 |
|
|
2025
Q3 | $29.1M | Sell |
207,700
-115,300
| -36% | -$15.6M | ﹤0.01% | 1319 |
|
|
2025
Q2 | $40.6M | Buy |
323,000
+112,700
| +54% | +$14M | 0.01% | 903 |
|
|
2025
Q1 | $28.8M | Buy |
210,300
+136,000
| +183% | +$19.4M | 0.01% | 1022 |
|
|
2024
Q4 | $11.4M | Buy |
74,300
+9,000
| +14% | +$1.52M | ﹤0.01% | 1763 |
|
|
2024
Q3 | $12.7M | Sell |
65,300
-32,000
| -33% | -$6.69M | ﹤0.01% | 1673 |
|
|
2024
Q2 | $22.6M | Buy |
97,300
+7,900
| +9% | +$1.72M | 0.01% | 1218 |
|
|
2024
Q1 | $19.3M | Sell |
89,400
-7,900
| -8% | -$1.85M | ﹤0.01% | 1214 |
|
|
2023
Q4 | $25.2M | Buy |
97,300
+17,600
| +22% | +$4.32M | 0.01% | 1083 |
|
|
2023
Q3 | $20.5M | Buy |
79,700
+9,400
| +13% | +$2.51M | 0.01% | 1077 |
|
|
2023
Q2 | $20M | Sell |
70,300
-24,900
| -26% | -$7.41M | 0.01% | 1207 |
|
|
2023
Q1 | $26.5M | Sell |
95,200
-153,800
| -62% | -$42.6M | 0.01% | 830 |
|
|
2022
Q4 | $69M | Sell |
249,000
-314,100
| -56% | -$88.7M | 0.03% | 406 |
|
|
2022
Q3 | $150M | Buy |
563,100
+64,500
| +13% | +$13.7M | 0.07% | 179 |
|
|
2022
Q2 | $102M | Buy |
498,600
+181,500
| +57% | +$37.1M | 0.04% | 310 |
|
|
2022
Q1 | $66.8M | Sell |
317,100
-19,100
| -6% | -$4.15M | 0.02% | 550 |
|
|
2021
Q4 | $80.7M | Buy |
336,200
+2,200
| +0.7% | +$566K | 0.03% | 449 |
|
|
2021
Q3 | $94.5M | Sell |
334,000
-56,400
| -14% | -$18.5M | 0.03% | 357 |
|
|
2021
Q2 | $135M | Buy |
390,400
+165,200
| +73% | +$50M | 0.05% | 246 |
|
|
2021
Q1 | $63M | Sell |
225,200
-258,500
| -53% | -$69.7M | 0.03% | 416 |
|
|
2020
Q4 | $118M | Buy |
483,700
+159,200
| +49% | +$41.1M | 0.06% | 211 |
|
|
2020
Q3 | $92.1M | Buy |
324,500
+62,600
| +24% | +$17.5M | 0.06% | 237 |
|
|
2020
Q2 | $70.1M | Buy |
261,900
+95,900
| +58% | +$28.8M | 0.05% | 254 |
|
|
2020
Q1 | $52.5M | Buy |
166,000
+36,100
| +28% | +$11M | 0.05% | 240 |
|
|
2019
Q4 | $38.5M | Sell |
129,900
-32,800
| -20% | -$9.1M | 0.05% | 225 |
|
|
2019
Q3 | $37.9M | Buy |
162,700
+96,200
| +145% | +$22.4M | 0.06% | 211 |
|
|
2019
Q2 | $15.6M | Sell |
66,500
-122,900
| -65% | -$28.4M | 0.03% | 457 |
|
|
2019
Q1 | $44.8M | Buy |
189,400
+175,600
| +1,272% | +$55.3M | 0.07% | 198 |
|
|
2018
Q4 | $4.15M | Sell |
13,800
-6,200
| -31% | -$1.98M | 0.01% | 1065 |
|
|
2018
Q3 | $7.07M | Sell |
20,000
-19,600
| -49% | -$6.75M | 0.01% | 814 |
|
|
2018
Q2 | $11.5M | Buy |
39,600
+15,500
| +64% | +$4.36M | 0.03% | 538 |
|
|
2018
Q1 | $6.6M | Sell |
24,100
-59,500
| -71% | -$18.5M | 0.02% | 780 |
|
|
2017
Q4 | $26.6M | Buy |
83,600
+47,800
| +134% | +$15.3M | 0.08% | 227 |
|
|
2017
Q3 | $11.2M | Sell |
35,800
-74,700
| -68% | -$22.1M | 0.04% | 476 |
|
|
2017
Q2 | $30M | Buy |
110,500
+41,100
| +59% | +$10.9M | 0.11% | 169 |
|
|
2017
Q1 | $19M | Buy |
69,400
+35,000
| +102% | +$9.9M | 0.08% | 211 |
|
|
2016
Q4 | $9.76M | Sell |
34,400
-8,100
| -19% | -$2.4M | 0.04% | 361 |
|
|
2016
Q3 | $13.3M | Sell |
42,500
-50,500
| -54% | -$15M | 0.06% | 245 |
|
|
2016
Q2 | $22.5M | Buy |
93,000
+64,200
| +223% | +$16.9M | 0.11% | 167 |
|
|
2016
Q1 | $7.5M | Buy |
28,800
+4,600
| +19% | +$1.22M | 0.04% | 402 |
|
|
2015
Q4 | $7.41M | Sell |
24,200
-36,300
| -60% | -$10.4M | 0.05% | 363 |
|
|
2015
Q3 | $17.7M | Buy |
60,500
+23,100
| +62% | +$7.63M | 0.11% | 154 |
|
|
2015
Q2 | $15.1M | Buy |
37,400
+18,200
| +95% | +$7.3M | 0.1% | 151 |
|
|
2015
Q1 | $8.11M | Buy |
19,200
+18,600
| +3,100% | +$7.33M | 0.06% | 266 |
|
|
2014
Q4 | $204K | Buy |
+600
| New | +$194K | ﹤0.01% | 2212 |
|
Other funds holding BIIB
VCM
VPM
Jane Street's BIIB Position: Q1 2026 in Review
Jane Street reduced its Biogen (BIIB) stake by 56% in Q1 2026, selling an estimated $2.41M and leaving 10,469 shares worth $1.92M. The position accounts for ﹤0.01% of the portfolio, ranked #5178.
Jane Street first reported a position in BIIB in Q2 2013 and has held it in 50 quarters since. The position peaked at $81.3M in Q3 2022. 1,003 funds tracked by Wall St. Rank hold BIIB as of Q1 2026.
- Jane Street held 10,469 shares of Biogen worth $1.92M as of Q1 2026.
- Jane Street sold 13,070 Biogen shares in Q1 2026, an estimated $2.41M.
- Biogen made up ﹤0.01% of Jane Street's portfolio in Q1 2026, its #5178 holding.
- Jane Street first reported a position in Biogen in Q2 2013 and has held it in 50 quarters since.
- Jane Street's Biogen position peaked at $81.3M in Q3 2022.
- 1,003 funds tracked by Wall St. Rank held Biogen as of Q1 2026.
Based on Jane Street's 13F filing for Q1 2026, filed 12 May 2026.