Susquehanna International Group
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Susquehanna International Group’s Biogen BIIB Stock Holding History

Susquehanna International Group’s Portfolio BIIB Stock Details BIIB Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$25.7M Sell
140,299
-521,385
-79% -$96.1M ﹤0.01% 1915
2025
Q4 		$116M Buy
661,684
+220,602
+50% +$36M 0.01% 795
2025
Q3 		$61.8M Sell
441,082
-153,017
-26% -$20.7M 0.01% 1199
2025
Q2 		$74.6M Buy
594,099
+325,727
+121% +$40.6M 0.01% 916
2025
Q1 		$36.7M Sell
268,372
-216,676
-45% -$31M 0.01% 1227
2024
Q4 		$74.2M Buy
485,048
+223,901
+86% +$37.8M 0.01% 876
2024
Q3 		$50.6M Buy
261,147
+142,924
+121% +$29.9M 0.01% 1074
2024
Q2 		$27.4M Sell
118,223
-125,191
-51% -$27.2M 0.01% 1438
2024
Q1 		$52.5M Buy
243,414
+164,824
+210% +$38.6M 0.01% 1003
2023
Q4 		$20.3M Sell
78,590
-33,487
-30% -$8.22M ﹤0.01% 1801
2023
Q3 		$28.8M Buy
112,077
+73,296
+189% +$19.6M 0.01% 1418
2023
Q2 		$11M Sell
38,781
-51,337
-57% -$15.3M ﹤0.01% 2381
2023
Q1 		$25.1M Sell
90,118
-126,619
-58% -$35M 0.01% 1478
2022
Q4 		$60M Buy
216,737
+50,500
+30% +$14.3M 0.02% 790
2022
Q3 		$44.4M Buy
166,237
+63,502
+62% +$13.5M 0.01% 864
2022
Q2 		$21M Sell
102,735
-167,627
-62% -$34.3M 0.01% 1419
2022
Q1 		$56.9M Sell
270,362
-140,807
-34% -$30.6M 0.01% 937
2021
Q4 		$98.6M Buy
411,169
+20,103
+5% +$5.17M 0.01% 718
2021
Q3 		$111M Buy
391,066
+13,756
+4% +$4.51M 0.01% 740
2021
Q2 		$131M Buy
377,310
+116,668
+45% +$35.3M 0.02% 679
2021
Q1 		$72.9M Sell
260,642
-417,254
-62% -$113M 0.01% 884
2020
Q4 		$166M Buy
677,896
+286,040
+73% +$73.8M 0.03% 475
2020
Q3 		$111M Sell
391,856
-6,544
-2% -$1.83M 0.02% 529
2020
Q2 		$107M Buy
398,400
+240,135
+152% +$72.2M 0.03% 477
2020
Q1 		$50.1M Sell
158,265
-62,521
-28% -$19M 0.02% 657
2019
Q4 		$65.5M Sell
220,786
-156,910
-42% -$43.5M 0.02% 668
2019
Q3 		$87.9M Buy
377,696
+40,618
+12% +$9.46M 0.03% 490
2019
Q2 		$78.8M Sell
337,078
-278,820
-45% -$64.4M 0.03% 494
2019
Q1 		$146M Buy
615,898
+614,098
+34,117% +$193M 0.06% 273
2018
Q4 		$542K Buy
+1,800
New +$574K ﹤0.01% 5872
2018
Q3 		– Sell
-8,256
Closed -$2.84M – 9216
2018
Q2 		$2.4M Sell
8,256
-8,651
-51% -$2.43M ﹤0.01% 3721
2018
Q1 		$4.63M Buy
16,907
+4,242
+33% +$1.32M ﹤0.01% 2637
2017
Q4 		$4.03M Buy
+12,665
New +$4.06M ﹤0.01% 2816
2017
Q3 		– Sell
-80,641
Closed -$23.9M – 8808
2017
Q2 		$21.9M Sell
80,641
-147,632
-65% -$39M 0.01% 1103
2017
Q1 		$62.4M Sell
228,273
-14,423
-6% -$4.08M 0.03% 489
2016
Q4 		$68.8M Sell
242,696
-153,346
-39% -$45.5M 0.03% 443
2016
Q3 		$124M Sell
396,042
-47,534
-11% -$14.1M 0.06% 280
2016
Q2 		$107M Buy
443,576
+62,382
+16% +$16.4M 0.06% 293
2016
Q1 		$99.2M Sell
381,194
-89,451
-19% -$23.6M 0.05% 320
2015
Q4 		$144M Sell
470,645
-429,650
-48% -$123M 0.07% 259
2015
Q3 		$263M Buy
900,295
+194,004
+27% +$64.1M 0.11% 149
2015
Q2 		$285M Buy
706,291
+180,639
+34% +$72.5M 0.12% 132
2015
Q1 		$222M Buy
525,652
+250,325
+91% +$98.7M 0.1% 174
2014
Q4 		$93.5M Sell
275,327
-892
-0.3% -$289K 0.04% 441
2014
Q3 		$91.4M Sell
276,219
-222,578
-45% -$73.4M 0.04% 442
2014
Q2 		$157M Buy
498,797
+32,454
+7% +$9.77M 0.07% 247
2014
Q1 		$143M Buy
466,343
+358,912
+334% +$114M 0.07% 253
2013
Q4 		$30.1M Sell
107,431
-117,182
-52% -$30.3M 0.01% 995
2013
Q3 		$54.1M Sell
224,613
-46,350
-17% -$10.4M 0.03% 564
2013
Q2 		$58.3M Buy
+270,963
New +$57.9M 0.03% 489

Other funds holding BIIB

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $127B AUM 44.11% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return

Susquehanna International Group's BIIB Position: Q1 2026 in Review

Susquehanna International Group reduced its Biogen (BIIB) stake by 79% in Q1 2026, selling an estimated $96.1M and leaving 140,299 shares worth $25.7M. The position accounts for ﹤0.01% of the portfolio, ranked #1915.

Susquehanna International Group first reported a position in BIIB in Q2 2013 and has held it in 50 quarters since. The position peaked at $285M in Q2 2015. 1,002 funds tracked by Wall St. Rank hold BIIB as of Q1 2026.

  • Susquehanna International Group held 140,299 shares of Biogen worth $25.7M as of Q1 2026.
  • Susquehanna International Group sold 521,385 Biogen shares in Q1 2026, an estimated $96.1M.
  • Biogen made up ﹤0.01% of Susquehanna International Group's portfolio in Q1 2026, its #1915 holding.
  • Susquehanna International Group first reported a position in Biogen in Q2 2013 and has held it in 50 quarters since.
  • Susquehanna International Group's Biogen position peaked at $285M in Q2 2015.
  • 1,002 funds tracked by Wall St. Rank held Biogen as of Q1 2026.

Based on Susquehanna International Group's 13F filing for Q1 2026, filed 15 May 2026.