David Shaw’s Biogen BIIB Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2026
Q2 | – | Sell |
-15,500
| Closed | -$2.84M | – | 4886 |
|
|
2026
Q1 | $2.84M | Buy |
15,500
+2,300
| +17% | +$424K | ﹤0.01% | 2636 |
|
|
2025
Q4 | $2.32M | Sell |
13,200
-19,300
| -59% | -$3.15M | ﹤0.01% | 2932 |
|
|
2025
Q3 | $4.55M | Buy |
32,500
+27,900
| +607% | +$3.77M | ﹤0.01% | 2310 |
|
|
2025
Q2 | $578K | Buy |
4,600
+2,800
| +156% | +$349K | ﹤0.01% | 3574 |
|
|
2025
Q1 | $246K | Sell |
1,800
-1,100
| -38% | -$157K | ﹤0.01% | 3847 |
|
|
2024
Q4 | $443K | Buy |
2,900
+500
| +21% | +$84.3K | ﹤0.01% | 3690 |
|
|
2024
Q3 | $465K | Sell |
2,400
-6,800
| -74% | -$1.42M | ﹤0.01% | 3740 |
|
|
2024
Q2 | $2.13M | Sell |
9,200
-2,700
| -23% | -$587K | ﹤0.01% | 2607 |
|
|
2024
Q1 | $2.57M | Buy |
+11,900
| New | +$2.79M | ﹤0.01% | 2434 |
|
|
2023
Q1 | – | Sell |
-10,000
| Closed | -$2.77M | – | 4447 |
|
|
2022
Q4 | $2.77M | Hold |
10,000
| – | – | ﹤0.01% | 2651 |
|
|
2022
Q3 | $2.67M | Sell |
10,000
-10,000
| -50% | -$2.12M | ﹤0.01% | 2745 |
|
|
2022
Q2 | $4.08M | Sell |
20,000
-63,000
| -76% | -$12.9M | ﹤0.01% | 2369 |
|
|
2022
Q1 | $17.5M | Buy |
83,000
+73,000
| +730% | +$15.9M | 0.02% | 1126 |
|
|
2021
Q4 | $2.4M | Buy |
+10,000
| New | +$2.57M | ﹤0.01% | 3191 |
|
|
2020
Q4 | – | Sell |
-10,000
| Closed | -$2.84M | – | 3917 |
|
|
2020
Q3 | $2.84M | Sell |
10,000
-40,000
| -80% | -$11.2M | ﹤0.01% | 2121 |
|
|
2020
Q2 | $13.4M | Buy |
50,000
+20,000
| +67% | +$6.01M | 0.02% | 1024 |
|
|
2020
Q1 | $9.49M | Sell |
30,000
-14,300
| -32% | -$4.34M | 0.01% | 1025 |
|
|
2019
Q4 | $13.1M | Sell |
44,300
-40,000
| -47% | -$11.1M | 0.02% | 1043 |
|
|
2019
Q3 | $19.6M | Hold |
84,300
| – | – | 0.02% | 780 |
|
|
2019
Q2 | $19.7M | Buy |
84,300
+60,000
| +247% | +$13.9M | 0.02% | 758 |
|
|
2019
Q1 | $5.74M | Sell |
24,300
-150,100
| -86% | -$47.3M | 0.01% | 1458 |
|
|
2018
Q4 | $52.5M | Buy |
174,400
+50,000
| +40% | +$16M | 0.07% | 329 |
|
|
2018
Q3 | $44M | Sell |
124,400
-89,000
| -42% | -$30.6M | 0.05% | 447 |
|
|
2018
Q2 | $61.9M | Buy |
213,400
+84,400
| +65% | +$23.7M | 0.08% | 309 |
|
|
2018
Q1 | $35.3M | Sell |
129,000
-56,100
| -30% | -$17.4M | 0.05% | 454 |
|
|
2017
Q4 | $59M | Buy |
185,100
+53,300
| +40% | +$17.1M | 0.08% | 301 |
|
|
2017
Q3 | $41.3M | Buy |
131,800
+31,700
| +32% | +$9.39M | 0.06% | 368 |
|
|
2017
Q2 | $27.2M | Buy |
100,100
+10,000
| +11% | +$2.64M | 0.04% | 479 |
|
|
2017
Q1 | $24.6M | Sell |
90,100
-13,000
| -13% | -$3.68M | 0.04% | 492 |
|
|
2016
Q4 | $29.2M | Buy |
103,100
+23,400
| +29% | +$6.94M | 0.05% | 480 |
|
|
2016
Q3 | $24.9M | Buy |
79,700
+39,200
| +97% | +$11.6M | 0.04% | 502 |
|
|
2016
Q2 | $9.79M | Buy |
40,500
+2,000
| +5% | +$527K | 0.02% | 905 |
|
|
2016
Q1 | $10M | Sell |
38,500
-61,100
| -61% | -$16.1M | 0.02% | 865 |
|
|
2015
Q4 | $30.5M | Sell |
99,600
-5,800
| -6% | -$1.67M | 0.05% | 456 |
|
|
2015
Q3 | $30.8M | Buy |
105,400
+9,900
| +10% | +$3.27M | 0.05% | 458 |
|
|
2015
Q2 | $38.6M | Sell |
95,500
-11,100
| -10% | -$4.45M | 0.06% | 398 |
|
|
2015
Q1 | $45M | Sell |
106,600
-80,700
| -43% | -$31.8M | 0.07% | 336 |
|
|
2014
Q4 | $63.6M | Buy |
187,300
+15,900
| +9% | +$5.14M | 0.08% | 287 |
|
|
2014
Q3 | $56.7M | Sell |
171,400
-44,900
| -21% | -$14.8M | 0.07% | 310 |
|
|
2014
Q2 | $68.2M | Buy |
216,300
+400
| +0.2% | +$120K | 0.09% | 245 |
|
|
2014
Q1 | $66M | Buy |
215,900
+33,800
| +19% | +$10.7M | 0.09% | 229 |
|
|
2013
Q4 | $50.9M | Buy |
182,100
+10,000
| +6% | +$2.59M | 0.07% | 308 |
|
|
2013
Q3 | $41.4M | Buy |
172,100
+61,400
| +55% | +$13.7M | 0.07% | 319 |
|
|
2013
Q2 | $23.8M | Buy |
+110,700
| New | +$23.7M | 0.04% | 459 |
|
Other funds holding BIIB
David Shaw's BIIB Position: Q2 2026 in Review
David Shaw opened a new position in Biogen (BIIB) in Q2 2026: 74,438 shares worth $16.1M. The stake represents 0.01% of the portfolio and ranks #1451 among its holdings. This is a return to the name: David Shaw previously reported a position in BIIB as recently as Q4 2025.
David Shaw first reported a position in BIIB in Q2 2013 and has held it in 52 quarters since. The position peaked at $641M in Q4 2015. 1,036 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.
- David Shaw held 74,438 shares of Biogen worth $16.1M as of Q2 2026.
- Biogen was a new David Shaw position in Q2 2026.
- Biogen made up 0.01% of David Shaw's portfolio in Q2 2026, its #1451 holding.
- David Shaw first reported a position in Biogen in Q2 2013 and has held it in 52 quarters since.
- David Shaw's Biogen position peaked at $641M in Q4 2015.
- 1,036 funds tracked by Wall St. Rank held Biogen as of Q2 2026.
Based on D.E. Shaw & Co's 13F filing for Q2 2026, filed 14 Aug 2026.