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 | $16.1M | Buy |
+74,438
| New | +$14.2M | 0.01% | 1451 |
|
|
2026
Q1 | – | Sell |
-53,754
| Closed | -$9.9M | – | 4558 |
|
|
2025
Q4 | $9.46M | Sell |
53,754
-424,170
| -89% | -$69.3M | 0.01% | 1808 |
|
|
2025
Q3 | $66.9M | Sell |
477,924
-888,283
| -65% | -$120M | 0.04% | 527 |
|
|
2025
Q2 | $172M | Sell |
1,366,207
-219,365
| -14% | -$27.3M | 0.12% | 187 |
|
|
2025
Q1 | $217M | Sell |
1,585,572
-24,327
| -2% | -$3.48M | 0.19% | 105 |
|
|
2024
Q4 | $246M | Buy |
1,609,899
+1,174,960
| +270% | +$198M | 0.18% | 110 |
|
|
2024
Q3 | $84.3M | Buy |
434,939
+220,248
| +103% | +$46.1M | 0.07% | 325 |
|
|
2024
Q2 | $49.8M | Sell |
214,691
-85,317
| -28% | -$18.5M | 0.05% | 458 |
|
|
2024
Q1 | $64.7M | Buy |
300,008
+276,073
| +1,153% | +$64.7M | 0.06% | 392 |
|
|
2023
Q4 | $6.19M | Sell |
23,935
-254,903
| -91% | -$62.6M | 0.01% | 1740 |
|
|
2023
Q3 | $71.7M | Sell |
278,838
-567,606
| -67% | -$152M | 0.07% | 313 |
|
|
2023
Q2 | $241M | Sell |
846,444
-487,546
| -37% | -$145M | 0.25% | 66 |
|
|
2023
Q1 | $371M | Sell |
1,333,990
-422,092
| -24% | -$117M | 0.4% | 24 |
|
|
2022
Q4 | $486M | Buy |
1,756,082
+220,767
| +14% | +$62.4M | 0.54% | 8 |
|
|
2022
Q3 | $410M | Buy |
1,535,315
+179,461
| +13% | +$38.1M | 0.49% | 15 |
|
|
2022
Q2 | $277M | Buy |
1,355,854
+361,974
| +36% | +$74M | 0.32% | 29 |
|
|
2022
Q1 | $209M | Buy |
993,880
+396,919
| +66% | +$86.3M | 0.2% | 84 |
|
|
2021
Q4 | $143M | Buy |
596,961
+220,470
| +59% | +$56.7M | 0.12% | 177 |
|
|
2021
Q3 | $107M | Sell |
376,491
-413,202
| -52% | -$135M | 0.1% | 230 |
|
|
2021
Q2 | $273M | Buy |
789,693
+180,453
| +30% | +$54.7M | 0.24% | 69 |
|
|
2021
Q1 | $170M | Sell |
609,240
-78,553
| -11% | -$21.2M | 0.16% | 118 |
|
|
2020
Q4 | $168M | Buy |
687,793
+319,901
| +87% | +$82.5M | 0.15% | 132 |
|
|
2020
Q3 | $104M | Sell |
367,892
-475,814
| -56% | -$133M | 0.11% | 209 |
|
|
2020
Q2 | $226M | Buy |
843,706
+427,363
| +103% | +$128M | 0.27% | 57 |
|
|
2020
Q1 | $132M | Sell |
416,343
-1,167,480
| -74% | -$354M | 0.21% | 95 |
|
|
2019
Q4 | $470M | Sell |
1,583,823
-1,085,030
| -41% | -$301M | 0.54% | 15 |
|
|
2019
Q3 | $621M | Buy |
2,668,853
+95,877
| +4% | +$22.3M | 0.77% | 8 |
|
|
2019
Q2 | $602M | Buy |
2,572,976
+1,524,355
| +145% | +$352M | 0.75% | 11 |
|
|
2019
Q1 | $248M | Buy |
1,048,621
+651,468
| +164% | +$205M | 0.32% | 53 |
|
|
2018
Q4 | $120M | Sell |
397,153
-46,678
| -11% | -$14.9M | 0.16% | 133 |
|
|
2018
Q3 | $157M | Buy |
443,831
+108,002
| +32% | +$37.2M | 0.19% | 108 |
|
|
2018
Q2 | $97.5M | Sell |
335,829
-619,096
| -65% | -$174M | 0.13% | 186 |
|
|
2018
Q1 | $261M | Buy |
954,925
+478,787
| +101% | +$149M | 0.36% | 48 |
|
|
2017
Q4 | $152M | Sell |
476,138
-133,795
| -22% | -$42.9M | 0.21% | 96 |
|
|
2017
Q3 | $191M | Sell |
609,933
-695,925
| -53% | -$206M | 0.29% | 62 |
|
|
2017
Q2 | $354M | Sell |
1,305,858
-253,197
| -16% | -$67M | 0.59% | 18 |
|
|
2017
Q1 | $426M | Sell |
1,559,055
-252,028
| -14% | -$71.3M | 0.75% | 11 |
|
|
2016
Q4 | $514M | Buy |
1,811,083
+199,699
| +12% | +$59.2M | 0.87% | 5 |
|
|
2016
Q3 | $504M | Sell |
1,611,384
-4,266
| -0.3% | -$1.26M | 0.89% | 7 |
|
|
2016
Q2 | $391M | Sell |
1,615,650
-612,567
| -27% | -$161M | 0.72% | 8 |
|
|
2016
Q1 | $580M | Buy |
2,228,217
+135,608
| +6% | +$35.8M | 1.04% | 4 |
|
|
2015
Q4 | $641M | Buy |
2,092,609
+1,494,231
| +250% | +$429M | 0.95% | 2 |
|
|
2015
Q3 | $175M | Buy |
598,378
+448,869
| +300% | +$148M | 0.26% | 80 |
|
|
2015
Q2 | $60.4M | Sell |
149,509
-763,424
| -84% | -$306M | 0.09% | 263 |
|
|
2015
Q1 | $385M | Buy |
912,933
+712,993
| +357% | +$281M | 0.59% | 21 |
|
|
2014
Q4 | $67.9M | Sell |
199,940
-4,381
| -2% | -$1.42M | 0.09% | 270 |
|
|
2014
Q3 | $67.6M | Buy |
204,321
+191,657
| +1,513% | +$63.2M | 0.09% | 266 |
|
|
2014
Q2 | $3.99M | Sell |
12,664
-314,750
| -96% | -$94.7M | 0.01% | 1777 |
|
|
2014
Q1 | $100M | Buy |
327,414
+45,528
| +16% | +$14.5M | 0.14% | 140 |
|
|
2013
Q4 | $78.9M | Buy |
281,886
+156,929
| +126% | +$40.6M | 0.11% | 187 |
|
|
2013
Q3 | $30.1M | Sell |
124,957
-125,330
| -50% | -$28M | 0.05% | 426 |
|
|
2013
Q2 | $53.9M | Buy |
+250,287
| New | +$53.5M | 0.1% | 209 |
|
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.