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 | $19.9M | Sell |
108,700
-242,700
| -69% | -$44.7M | ﹤0.01% | 1788 |
|
|
2025
Q4 | $61.8M | Sell |
351,400
-32,100
| -8% | -$5.24M | 0.01% | 817 |
|
|
2025
Q3 | $53.7M | Buy |
383,500
+71,000
| +23% | +$9.6M | 0.01% | 919 |
|
|
2025
Q2 | $39.2M | Buy |
312,500
+139,500
| +81% | +$17.4M | 0.01% | 936 |
|
|
2025
Q1 | $23.7M | Buy |
173,000
+24,100
| +16% | +$3.45M | 0.01% | 1171 |
|
|
2024
Q4 | $22.8M | Buy |
148,900
+74,400
| +100% | +$12.5M | ﹤0.01% | 1167 |
|
|
2024
Q3 | $14.4M | Sell |
74,500
-77,800
| -51% | -$16.3M | ﹤0.01% | 1543 |
|
|
2024
Q2 | $35.3M | Buy |
152,300
+78,900
| +107% | +$17.1M | 0.01% | 887 |
|
|
2024
Q1 | $15.8M | Sell |
73,400
-46,000
| -39% | -$10.8M | ﹤0.01% | 1385 |
|
|
2023
Q4 | $30.9M | Buy |
119,400
+5,200
| +5% | +$1.28M | 0.01% | 947 |
|
|
2023
Q3 | $29.4M | Buy |
114,200
+39,000
| +52% | +$10.4M | 0.01% | 821 |
|
|
2023
Q2 | $21.4M | Sell |
75,200
-34,100
| -31% | -$10.2M | 0.01% | 1146 |
|
|
2023
Q1 | $30.4M | Sell |
109,300
-117,200
| -52% | -$32.4M | 0.01% | 745 |
|
|
2022
Q4 | $62.7M | Sell |
226,500
-217,400
| -49% | -$61.4M | 0.03% | 438 |
|
|
2022
Q3 | $119M | Buy |
443,900
+130,500
| +42% | +$27.7M | 0.05% | 234 |
|
|
2022
Q2 | $63.9M | Buy |
313,400
+72,900
| +30% | +$14.9M | 0.03% | 446 |
|
|
2022
Q1 | $50.6M | Sell |
240,500
-77,100
| -24% | -$16.8M | 0.02% | 680 |
|
|
2021
Q4 | $76.2M | Sell |
317,600
-160,900
| -34% | -$41.4M | 0.03% | 470 |
|
|
2021
Q3 | $135M | Sell |
478,500
-173,900
| -27% | -$57M | 0.05% | 266 |
|
|
2021
Q2 | $226M | Buy |
652,400
+343,400
| +111% | +$104M | 0.09% | 144 |
|
|
2021
Q1 | $86.4M | Buy |
309,000
+37,900
| +14% | +$10.2M | 0.04% | 315 |
|
|
2020
Q4 | $66.4M | Sell |
271,100
-2,100
| -0.8% | -$542K | 0.03% | 361 |
|
|
2020
Q3 | $77.5M | Buy |
273,200
+35,700
| +15% | +$9.96M | 0.05% | 275 |
|
|
2020
Q2 | $63.5M | Buy |
237,500
+84,400
| +55% | +$25.4M | 0.05% | 278 |
|
|
2020
Q1 | $48.4M | Buy |
153,100
+93,200
| +156% | +$28.3M | 0.05% | 250 |
|
|
2019
Q4 | $17.8M | Sell |
59,900
-27,000
| -31% | -$7.49M | 0.02% | 419 |
|
|
2019
Q3 | $20.2M | Buy |
86,900
+9,900
| +13% | +$2.31M | 0.03% | 355 |
|
|
2019
Q2 | $18M | Sell |
77,000
-98,700
| -56% | -$22.8M | 0.03% | 402 |
|
|
2019
Q1 | $41.5M | Buy |
175,700
+143,400
| +444% | +$45.2M | 0.07% | 220 |
|
|
2018
Q4 | $9.72M | Buy |
32,300
+2,800
| +9% | +$894K | 0.02% | 595 |
|
|
2018
Q3 | $10.4M | Sell |
29,500
-2,800
| -9% | -$964K | 0.02% | 585 |
|
|
2018
Q2 | $9.38M | Sell |
32,300
-20,300
| -39% | -$5.71M | 0.02% | 644 |
|
|
2018
Q1 | $14.4M | Buy |
52,600
+24,200
| +85% | +$7.51M | 0.04% | 408 |
|
|
2017
Q4 | $9.05M | Sell |
28,400
-34,300
| -55% | -$11M | 0.03% | 550 |
|
|
2017
Q3 | $19.6M | Sell |
62,700
-84,400
| -57% | -$25M | 0.06% | 279 |
|
|
2017
Q2 | $39.9M | Buy |
147,100
+103,600
| +238% | +$27.4M | 0.14% | 138 |
|
|
2017
Q1 | $11.9M | Sell |
43,500
-35,300
| -45% | -$9.98M | 0.05% | 324 |
|
|
2016
Q4 | $22.3M | Buy |
78,800
+22,400
| +40% | +$6.64M | 0.1% | 170 |
|
|
2016
Q3 | $17.7M | Buy |
56,400
+17,300
| +44% | +$5.12M | 0.08% | 201 |
|
|
2016
Q2 | $9.46M | Buy |
39,100
+1,300
| +3% | +$343K | 0.05% | 358 |
|
|
2016
Q1 | $9.84M | Sell |
37,800
-16,600
| -31% | -$4.38M | 0.06% | 303 |
|
|
2015
Q4 | $16.7M | Buy |
54,400
+18,900
| +53% | +$5.43M | 0.1% | 178 |
|
|
2015
Q3 | $10.4M | Buy |
35,500
+7,600
| +27% | +$2.51M | 0.06% | 253 |
|
|
2015
Q2 | $11.3M | Buy |
27,900
+21,400
| +329% | +$8.59M | 0.07% | 210 |
|
|
2015
Q1 | $2.75M | Buy |
6,500
+5,300
| +442% | +$2.09M | 0.02% | 676 |
|
|
2014
Q4 | $407K | Buy |
1,200
+500
| +71% | +$162K | ﹤0.01% | 1652 |
|
|
2014
Q3 | $232K | Buy |
+700
| New | +$231K | ﹤0.01% | 2087 |
|
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.