D.E. Shaw & Co
BIIB icon

D.E. Shaw & Co’s Biogen BIIB Stock Holding History

Quarter Market Value Status Shares Shares
Change %
Trade Value Portfolio Weight Portfolio Position
2025
Q2
$172M Sell
1,366,207
-219,365
-14% -$27.6M 0.12% 130
2025
Q1
$217M Sell
1,585,572
-24,327
-2% -$3.33M 0.19% 79
2024
Q4
$246M Buy
1,609,899
+1,174,960
+270% +$180M 0.18% 70
2024
Q3
$84.3M Buy
434,939
+220,248
+103% +$42.7M 0.07% 204
2024
Q2
$49.8M Sell
214,691
-85,317
-28% -$19.8M 0.05% 286
2024
Q1
$64.7M Buy
300,008
+276,073
+1,153% +$59.5M 0.06% 245
2023
Q4
$6.19M Sell
23,935
-254,903
-91% -$66M 0.01% 1110
2023
Q3
$71.7M Sell
278,838
-567,606
-67% -$146M 0.07% 183
2023
Q2
$241M Sell
846,444
-487,546
-37% -$139M 0.25% 42
2023
Q1
$371M Sell
1,333,990
-422,092
-24% -$117M 0.4% 17
2022
Q4
$486M Buy
1,756,082
+220,767
+14% +$61.1M 0.54% 7
2022
Q3
$410M Buy
1,535,315
+179,461
+13% +$47.9M 0.49% 14
2022
Q2
$277M Buy
1,355,854
+361,974
+36% +$73.8M 0.32% 23
2022
Q1
$209M Buy
993,880
+396,919
+66% +$83.6M 0.2% 62
2021
Q4
$143M Buy
596,961
+220,470
+59% +$52.9M 0.12% 122
2021
Q3
$107M Sell
376,491
-413,202
-52% -$117M 0.1% 166
2021
Q2
$273M Buy
789,693
+180,453
+30% +$62.5M 0.24% 56
2021
Q1
$170M Sell
609,240
-78,553
-11% -$22M 0.16% 99
2020
Q4
$168M Buy
687,793
+319,901
+87% +$78.3M 0.15% 101
2020
Q3
$104M Sell
367,892
-475,814
-56% -$135M 0.11% 164
2020
Q2
$226M Buy
843,706
+427,363
+103% +$114M 0.27% 52
2020
Q1
$132M Sell
416,343
-1,167,480
-74% -$369M 0.21% 81
2019
Q4
$470M Sell
1,583,823
-1,085,030
-41% -$322M 0.54% 14
2019
Q3
$621M Buy
2,668,853
+95,877
+4% +$22.3M 0.77% 7
2019
Q2
$602M Buy
2,572,976
+1,524,355
+145% +$357M 0.75% 10
2019
Q1
$248M Buy
1,048,621
+651,468
+164% +$154M 0.32% 49
2018
Q4
$120M Sell
397,153
-46,678
-11% -$14M 0.16% 104
2018
Q3
$157M Buy
443,831
+108,002
+32% +$38.2M 0.19% 87
2018
Q2
$97.5M Sell
335,829
-619,096
-65% -$180M 0.13% 149
2018
Q1
$261M Buy
954,925
+478,787
+101% +$131M 0.36% 42
2017
Q4
$152M Sell
476,138
-133,795
-22% -$42.6M 0.21% 78
2017
Q3
$191M Sell
609,933
-695,925
-53% -$218M 0.29% 54
2017
Q2
$354M Sell
1,305,858
-253,197
-16% -$68.7M 0.59% 18
2017
Q1
$426M Sell
1,559,055
-252,028
-14% -$68.9M 0.75% 11
2016
Q4
$514M Buy
1,811,083
+199,699
+12% +$56.6M 0.87% 4
2016
Q3
$504M Sell
1,611,384
-4,266
-0.3% -$1.34M 0.89% 6
2016
Q2
$391M Sell
1,615,650
-612,567
-27% -$148M 0.72% 7
2016
Q1
$580M Buy
2,228,217
+135,608
+6% +$35.3M 1.04% 4
2015
Q4
$641M Buy
2,092,609
+1,494,231
+250% +$458M 0.95% 2
2015
Q3
$175M Buy
598,378
+448,869
+300% +$131M 0.26% 67
2015
Q2
$60.4M Sell
149,509
-763,424
-84% -$308M 0.09% 210
2015
Q1
$385M Buy
912,933
+712,993
+357% +$301M 0.59% 19
2014
Q4
$67.9M Sell
199,940
-4,381
-2% -$1.49M 0.09% 182
2014
Q3
$67.6M Buy
204,321
+191,657
+1,513% +$63.4M 0.09% 175
2014
Q2
$3.99M Sell
12,664
-314,750
-96% -$99.2M 0.01% 987
2014
Q1
$100M Buy
327,414
+45,528
+16% +$13.9M 0.14% 110
2013
Q4
$78.9M Buy
281,886
+156,929
+126% +$43.9M 0.11% 125
2013
Q3
$30.1M Sell
124,957
-125,330
-50% -$30.2M 0.05% 267
2013
Q2
$53.9M Buy
+250,287
New +$53.9M 0.1% 149