Simplex Trading’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
$13.2M Buy
71,900
+13,400
+23% +$2.47M 0.01% 580
2025
Q4
$10.3M Sell
58,500
-14,500
-20% -$2.37M 0.01% 830
2025
Q3
$10.2M Sell
73,000
-7,100
-9% -$960K 0.01% 956
2025
Q2
$10.1M Sell
80,100
-7,400
-8% -$922K 0.01% 888
2025
Q1
$12M Buy
87,500
+17,800
+26% +$2.54M 0.01% 775
2024
Q4
$10.7M Buy
69,700
+16,500
+31% +$2.78M 0.01% 992
2024
Q3
$10.3M Sell
53,200
-4,300
-7% -$900K 0.01% 1016
2024
Q2
$13.3M Sell
57,500
-26,900
-32% -$5.85M 0.01% 828
2024
Q1
$18.2M Sell
84,400
-25,600
-23% -$6M 0.01% 759
2023
Q4
$28.5M Buy
110,000
+4,500
+4% +$1.11M 0.02% 557
2023
Q3
$27.1M Buy
105,500
+26,900
+34% +$7.19M 0.02% 464
2023
Q2
$22.4M Sell
78,600
-21,700
-22% -$6.46M 0.02% 533
2023
Q1
$27.9M Sell
100,300
-158,200
-61% -$43.8M 0.02% 453
2022
Q4
$71.6M Sell
258,500
-135,900
-34% -$38.4M 0.08% 206
2022
Q3
$105M Buy
394,400
+157,400
+66% +$33.4M 0.12% 104
2022
Q2
$48.3M Buy
237,000
+20,100
+9% +$4.11M 0.05% 255
2022
Q1
$45.7M Buy
216,900
+500
+0.2% +$109K 0.04% 307
2021
Q4
$51.9M Buy
216,400
+63,800
+42% +$16.4M 0.05% 267
2021
Q3
$53.2M Buy
152,600
+5,100
+3% +$1.67M 0.05% 235
2021
Q2
$51.1M Buy
+147,500
New +$44.7M 0.05% 238
2021
Q1
Sell
-3,468
Closed -$84.9M 8821
2020
Q4
$84.9M Buy
3,468
+1,646
+90% +$425K 0.11% 105
2020
Q3
$51.7M Buy
1,822
+151
+9% +$42.1K 0.07% 158
2020
Q2
$44.7M Buy
1,671
+64
+4% +$19.2K 0.07% 153
2020
Q1
$50.8M Sell
1,607
-458
-22% -$139K 0.09% 115
2019
Q4
$61.3M Buy
2,065
+640
+45% +$178K 0.13% 85
2019
Q3
$33.2M Buy
1,425
+195
+16% +$45.4K 0.09% 145
2019
Q2
$28.8M Sell
1,230
-293
-19% -$67.7K 0.08% 157
2019
Q1
$36M Buy
1,523
+641
+73% +$202K 0.1% 133
2018
Q4
$26.5M Sell
882
-16
-2% -$5.11K 0.08% 160
2018
Q3
$31.7M Buy
898
+260
+41% +$89.5K 0.1% 137
2018
Q2
$18.5M Sell
638
-63
-9% -$17.7K 0.07% 197
2018
Q1
$611K Sell
701
-207
-23% -$64.3K 0.03% 620
2017
Q4
$1.68M Sell
908
-407
-31% -$131K 0.07% 227
2017
Q3
$1.91M Sell
1,315
-228
-15% -$67.5K 0.08% 203
2017
Q2
$1.47M Buy
1,543
+713
+86% +$189K 0.06% 245
2017
Q1
$866K Buy
830
+20
+2% +$5.66K 0.04% 433
2016
Q4
$1.05M Buy
810
+11
+1% +$3.26K 0.06% 272
2016
Q3
$1.38M Buy
799
+175
+28% +$51.8K 0.09% 200
2016
Q2
$442K Sell
624
-360
-37% -$94.9K 0.03% 577
2016
Q1
$569K Sell
984
-1,473
-60% -$389K 0.05% 396
2015
Q4
$2.6M Buy
2,457
+322
+15% +$92.5K 0.2% 85
2015
Q3
$1.07M Buy
2,135
+1,373
+180% +$453K 0.08% 221
2015
Q2
$3.15M Buy
762
+120
+19% +$48.2K 0.26% 57
2015
Q1
$3.07M Sell
642
-287
-31% -$113K 0.36% 49
2014
Q4
$2.57M Buy
+929
New +$301K 0.31% 54

Other funds holding BIIB

Simplex Trading's BIIB Position: Q1 2026 in Review

Simplex Trading reduced its Biogen (BIIB) stake by 93% in Q1 2026, selling an estimated $5.29M and leaving 2,164 shares worth $397K. The position accounts for ﹤0.01% of the portfolio, ranked #3540.

Simplex Trading first reported a position in BIIB in Q1 2015 and has held it in 24 quarters since. The position peaked at $15.8M in Q3 2019. 1,002 funds tracked by Wall St. Rank hold BIIB as of Q1 2026.

  • Simplex Trading held 2,164 shares of Biogen worth $397K as of Q1 2026.
  • Simplex Trading sold 28,714 Biogen shares in Q1 2026, an estimated $5.29M.
  • Biogen made up ﹤0.01% of Simplex Trading's portfolio in Q1 2026, its #3540 holding.
  • Simplex Trading first reported a position in Biogen in Q1 2015 and has held it in 24 quarters since.
  • Simplex Trading's Biogen position peaked at $15.8M in Q3 2019.
  • 1,002 funds tracked by Wall St. Rank held Biogen as of Q1 2026.

Based on Simplex Trading's 13F filing for Q1 2026, filed 14 May 2026.