Calamos 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 | $6.51M | Hold |
35,527
| – | – | 0.02% | 502 |
|
|
2025
Q4 | $6.25M | Sell |
35,527
-1,443
| -4% | -$236K | 0.02% | 494 |
|
|
2025
Q3 | $5.18M | Hold |
36,970
| – | – | 0.02% | 536 |
|
|
2025
Q2 | $4.64M | Hold |
36,970
| – | – | 0.02% | 557 |
|
|
2025
Q1 | $5.06M | Buy |
36,970
+412
| +1% | +$58.9K | 0.02% | 522 |
|
|
2024
Q4 | $5.59M | Hold |
36,558
| – | – | 0.02% | 505 |
|
|
2024
Q3 | $7.09M | Sell |
36,558
-897
| -2% | -$188K | 0.03% | 481 |
|
|
2024
Q2 | $8.68M | Sell |
37,455
-1,367
| -4% | -$297K | 0.04% | 435 |
|
|
2024
Q1 | $8.37M | Sell |
38,822
-976
| -2% | -$229K | 0.04% | 438 |
|
|
2023
Q4 | $10.3M | Sell |
39,798
-520
| -1% | -$128K | 0.05% | 383 |
|
|
2023
Q3 | $10.4M | Hold |
40,318
| – | – | 0.05% | 385 |
|
|
2023
Q2 | $11.5M | Hold |
40,318
| – | – | 0.06% | 380 |
|
|
2023
Q1 | $11.2M | Sell |
40,318
-5,041
| -11% | -$1.39M | 0.05% | 402 |
|
|
2022
Q4 | $12.6M | Sell |
45,359
-8,020
| -15% | -$2.27M | 0.06% | 398 |
|
|
2022
Q3 | $14.3M | Hold |
53,379
| – | – | 0.07% | 346 |
|
|
2022
Q2 | $10.9M | Buy |
53,379
+1,438
| +3% | +$294K | 0.05% | 458 |
|
|
2022
Q1 | $10.9M | Buy |
51,941
+6,923
| +15% | +$1.51M | 0.04% | 493 |
|
|
2021
Q4 | $10.8M | Buy |
45,018
+1,743
| +4% | +$448K | 0.04% | 464 |
|
|
2021
Q3 | $12.2M | Buy |
43,275
+3,818
| +10% | +$1.25M | 0.05% | 368 |
|
|
2021
Q2 | $13.7M | Buy |
39,457
+6,547
| +20% | +$1.98M | 0.06% | 323 |
|
|
2021
Q1 | $9.21M | Buy |
32,910
+958
| +3% | +$258K | 0.05% | 358 |
|
|
2020
Q4 | $7.82M | Sell |
31,952
-1,341
| -4% | -$346K | 0.05% | 383 |
|
|
2020
Q3 | $9.45M | Sell |
33,293
-2,752
| -8% | -$768K | 0.06% | 315 |
|
|
2020
Q2 | $9.64M | Sell |
36,045
-2,183
| -6% | -$656K | 0.07% | 298 |
|
|
2020
Q1 | $12.1M | Sell |
38,228
-3,089
| -7% | -$937K | 0.09% | 239 |
|
|
2019
Q4 | $12.3M | Sell |
41,317
-1,192
| -3% | -$331K | 0.06% | 307 |
|
|
2019
Q3 | $9.9M | Buy |
42,509
+3,447
| +9% | +$803K | 0.05% | 341 |
|
|
2019
Q2 | $9.13M | Sell |
39,062
-33,902
| -46% | -$7.83M | 0.05% | 359 |
|
|
2019
Q1 | $17.2M | Sell |
72,964
-19,664
| -21% | -$6.19M | 0.11% | 244 |
|
|
2018
Q4 | $27.9M | Buy |
92,628
+26,572
| +40% | +$8.48M | 0.18% | 165 |
|
|
2018
Q3 | $23.3M | Buy |
66,056
+32,896
| +99% | +$11.3M | 0.13% | 202 |
|
|
2018
Q2 | $9.62M | Buy |
33,160
+2,002
| +6% | +$563K | 0.06% | 328 |
|
|
2018
Q1 | $8.53M | Buy |
31,158
+1,358
| +5% | +$422K | 0.06% | 338 |
|
|
2017
Q4 | $9.49M | Sell |
29,800
-550
| -2% | -$176K | 0.05% | 303 |
|
|
2017
Q3 | $9.5M | Buy |
30,350
+1,545
| +5% | +$457K | 0.07% | 286 |
|
|
2017
Q2 | $7.82M | Buy |
28,805
+713
| +3% | +$189K | 0.06% | 318 |
|
|
2017
Q1 | $7.68M | Sell |
28,092
-60
| -0.2% | -$17K | 0.06% | 311 |
|
|
2016
Q4 | $7.98M | Sell |
28,152
-36,663
| -57% | -$10.9M | 0.06% | 290 |
|
|
2016
Q3 | $20.3M | Sell |
64,815
-93
| -0.1% | -$27.5K | 0.15% | 190 |
|
|
2016
Q2 | $15.7M | Sell |
64,908
-18
| -0% | -$4.74K | 0.11% | 220 |
|
|
2016
Q1 | $16.9M | Buy |
64,926
+1,881
| +3% | +$497K | 0.11% | 206 |
|
|
2015
Q4 | $19.3M | Sell |
63,045
-33,891
| -35% | -$9.74M | 0.12% | 199 |
|
|
2015
Q3 | $28.3M | Sell |
96,936
-213,047
| -69% | -$70.4M | 0.19% | 165 |
|
|
2015
Q2 | $125M | Buy |
309,983
+100,287
| +48% | +$40.2M | 0.77% | 22 |
|
|
2015
Q1 | $88.5M | Buy |
209,696
+54,657
| +35% | +$21.5M | 0.56% | 46 |
|
|
2014
Q4 | $52.6M | Sell |
155,039
-1,647
| -1% | -$533K | 0.35% | 83 |
|
|
2014
Q3 | $51.8M | Sell |
156,686
-25,893
| -14% | -$8.54M | 0.35% | 84 |
|
|
2014
Q2 | $57.6M | Sell |
182,579
-18,118
| -9% | -$5.45M | 0.36% | 78 |
|
|
2014
Q1 | $61.4M | Buy |
200,697
+34,466
| +21% | +$10.9M | 0.39% | 71 |
|
|
2013
Q4 | $46.5M | Sell |
166,231
-21,899
| -12% | -$5.66M | 0.3% | 92 |
|
|
2013
Q3 | $45.3M | Buy |
188,130
+15,651
| +9% | +$3.5M | 0.28% | 96 |
|
|
2013
Q2 | $37.1M | Buy |
+172,479
| New | +$36.9M | 0.24% | 112 |
|
Other funds holding BIIB
VCM
VPM
Calamos Advisors's BIIB Position: Q1 2026 in Review
Calamos Advisors held its Biogen (BIIB) position steady in Q1 2026 at 35,527 shares worth $6.51M. The position accounts for 0.02% of the portfolio, ranked #502.
Calamos Advisors first reported a position in BIIB in Q2 2013 and has held it in 52 quarters since. The position peaked at $125M in Q2 2015. 1,002 funds tracked by Wall St. Rank hold BIIB as of Q1 2026.
- Calamos Advisors held 35,527 shares of Biogen worth $6.51M as of Q1 2026.
- Calamos Advisors left its Biogen share count unchanged in Q1 2026.
- Biogen made up 0.02% of Calamos Advisors's portfolio in Q1 2026, its #502 holding.
- Calamos Advisors first reported a position in Biogen in Q2 2013 and has held it in 52 quarters since.
- Calamos Advisors's Biogen position peaked at $125M in Q2 2015.
- 1,002 funds tracked by Wall St. Rank held Biogen as of Q1 2026.
Based on Calamos Advisors's 13F filing for Q1 2026, filed 4 May 2026.