Citadel Advisors’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 | $25.3M | Buy |
138,093
+97,669
| +242% | +$18M | 0.02% | 2046 |
|
|
2025
Q4 | $7.11M | Sell |
40,424
-332,304
| -89% | -$54.3M | ﹤0.01% | 3736 |
|
|
2025
Q3 | $52.2M | Sell |
372,728
-235,862
| -39% | -$31.9M | 0.04% | 1338 |
|
|
2025
Q2 | $76.4M | Buy |
608,590
+66,826
| +12% | +$8.33M | 0.07% | 930 |
|
|
2025
Q1 | $74.1M | Buy |
541,764
+388,104
| +253% | +$55.5M | 0.07% | 872 |
|
|
2024
Q4 | $23.5M | Sell |
153,660
-218,706
| -59% | -$36.9M | 0.02% | 2004 |
|
|
2024
Q3 | $72.2M | Buy |
+372,366
| New | +$77.9M | 0.08% | 933 |
|
|
2024
Q2 | – | Sell |
-149,298
| Closed | -$32.4M | – | 14272 |
|
|
2024
Q1 | $32.2M | Buy |
149,298
+144,037
| +2,738% | +$33.7M | 0.03% | 1594 |
|
|
2023
Q4 | $1.36M | Sell |
5,261
-72,875
| -93% | -$17.9M | ﹤0.01% | 6065 |
|
|
2023
Q3 | $20.1M | Buy |
+78,136
| New | +$20.9M | 0.02% | 1851 |
|
|
2023
Q2 | – | Sell |
-245,084
| Closed | -$73M | – | 14358 |
|
|
2023
Q1 | $68.1M | Sell |
245,084
-2,728
| -1% | -$755K | 0.07% | 854 |
|
|
2022
Q4 | $68.6M | Sell |
247,812
-1,566
| -0.6% | -$442K | 0.08% | 891 |
|
|
2022
Q3 | $66.6M | Buy |
249,378
+40,935
| +20% | +$8.69M | 0.08% | 839 |
|
|
2022
Q2 | $42.5M | Buy |
208,443
+130,048
| +166% | +$26.6M | 0.06% | 1156 |
|
|
2022
Q1 | $16.5M | Sell |
78,395
-10,846
| -12% | -$2.36M | 0.02% | 2227 |
|
|
2021
Q4 | $21.4M | Sell |
89,241
-247,115
| -73% | -$63.5M | 0.02% | 1933 |
|
|
2021
Q3 | $95.2M | Sell |
336,356
-220,533
| -40% | -$72.3M | 0.11% | 685 |
|
|
2021
Q2 | $193M | Buy |
556,889
+333,326
| +149% | +$101M | 0.2% | 334 |
|
|
2021
Q1 | $62.5M | Sell |
223,563
-126,331
| -36% | -$34.1M | 0.07% | 864 |
|
|
2020
Q4 | $85.7M | Buy |
349,894
+326,285
| +1,382% | +$84.2M | 0.1% | 643 |
|
|
2020
Q3 | $6.7M | Sell |
23,609
-114,656
| -83% | -$32M | 0.01% | 2755 |
|
|
2020
Q2 | $37M | Sell |
138,265
-74,638
| -35% | -$22.4M | 0.05% | 1003 |
|
|
2020
Q1 | $67.4M | Sell |
212,903
-16,694
| -7% | -$5.07M | 0.1% | 510 |
|
|
2019
Q4 | $68.1M | Buy |
229,597
+85,415
| +59% | +$23.7M | 0.08% | 594 |
|
|
2019
Q3 | $33.6M | Buy |
144,182
+129,073
| +854% | +$30.1M | 0.04% | 1037 |
|
|
2019
Q2 | $3.53M | Sell |
15,109
-134,307
| -90% | -$31M | ﹤0.01% | 3606 |
|
|
2019
Q1 | $35.3M | Buy |
149,416
+13,237
| +10% | +$4.17M | 0.05% | 899 |
|
|
2018
Q4 | $41M | Buy |
136,179
+80,679
| +145% | +$25.7M | 0.06% | 723 |
|
|
2018
Q3 | $19.6M | Sell |
55,500
-59,634
| -52% | -$20.5M | 0.02% | 1407 |
|
|
2018
Q2 | $33.4M | Sell |
115,134
-144,233
| -56% | -$40.6M | 0.04% | 926 |
|
|
2018
Q1 | $71M | Buy |
259,367
+98,403
| +61% | +$30.5M | 0.11% | 442 |
|
|
2017
Q4 | $51.3M | Sell |
160,964
-502,732
| -76% | -$161M | 0.07% | 596 |
|
|
2017
Q3 | $208M | Sell |
663,696
-402,870
| -38% | -$119M | 0.33% | 85 |
|
|
2017
Q2 | $289M | Buy |
1,066,566
+275,284
| +35% | +$72.8M | 0.5% | 48 |
|
|
2017
Q1 | $216M | Buy |
791,282
+209,550
| +36% | +$59.2M | 0.38% | 63 |
|
|
2016
Q4 | $165M | Sell |
581,732
-225,808
| -28% | -$66.9M | 0.37% | 86 |
|
|
2016
Q3 | $253M | Sell |
807,540
-550,786
| -41% | -$163M | 0.54% | 42 |
|
|
2016
Q2 | $328M | Buy |
1,358,326
+1,019,258
| +301% | +$269M | 0.78% | 23 |
|
|
2016
Q1 | $88.3M | Sell |
339,068
-308,303
| -48% | -$81.4M | 0.23% | 150 |
|
|
2015
Q4 | $198M | Buy |
647,371
+55,482
| +9% | +$15.9M | 0.36% | 66 |
|
|
2015
Q3 | $173M | Buy |
591,889
+148,153
| +33% | +$48.9M | 0.27% | 107 |
|
|
2015
Q2 | $179M | Buy |
443,736
+336,793
| +315% | +$135M | 0.25% | 117 |
|
|
2015
Q1 | $45.2M | Buy |
106,943
+24,602
| +30% | +$9.7M | 0.07% | 530 |
|
|
2014
Q4 | $27.9M | Buy |
82,341
+25,163
| +44% | +$8.14M | 0.05% | 757 |
|
|
2014
Q3 | $18.9M | Buy |
57,178
+21,612
| +61% | +$7.13M | 0.03% | 942 |
|
|
2014
Q2 | $11.2M | Sell |
35,566
-105,287
| -75% | -$31.7M | 0.02% | 1181 |
|
|
2014
Q1 | $43.1M | Buy |
140,853
+33,721
| +31% | +$10.7M | 0.09% | 455 |
|
|
2013
Q4 | $30M | Buy |
107,132
+95,464
| +818% | +$24.7M | 0.06% | 588 |
|
|
2013
Q3 | $2.81M | Buy |
11,668
+8,053
| +223% | +$1.8M | 0.01% | 2084 |
|
|
2013
Q2 | $778K | Buy |
+3,615
| New | +$772K | ﹤0.01% | 3405 |
|
Other funds holding BIIB
VCM
VPM
