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 		$90.8M Sell
495,200
-206,600
-29% -$38.1M 0.01% 887
2025
Q4 		$124M Sell
701,800
-44,300
-6% -$7.24M 0.01% 755
2025
Q3 		$105M Buy
746,100
+40,800
+6% +$5.52M 0.01% 866
2025
Q2 		$88.6M Buy
705,300
+142,000
+25% +$17.7M 0.01% 818
2025
Q1 		$77.1M Buy
563,300
+144,100
+34% +$20.6M 0.01% 777
2024
Q4 		$64.1M Buy
419,200
+178,600
+74% +$30.1M 0.01% 948
2024
Q3 		$46.6M Sell
240,600
-106,600
-31% -$22.3M 0.01% 1150
2024
Q2 		$80.5M Sell
347,200
-24,300
-7% -$5.28M 0.02% 698
2024
Q1 		$80.1M Sell
371,500
-222,700
-37% -$52.2M 0.01% 772
2023
Q4 		$154M Sell
594,200
-39,700
-6% -$9.75M 0.03% 499
2023
Q3 		$163M Sell
633,900
-86,800
-12% -$23.2M 0.03% 419
2023
Q2 		$205M Sell
720,700
-170,900
-19% -$50.9M 0.04% 334
2023
Q1 		$248M Sell
891,600
-190,200
-18% -$52.6M 0.05% 288
2022
Q4 		$300M Sell
1,081,800
-366,600
-25% -$104M 0.08% 225
2022
Q3 		$387M Buy
1,448,400
+511,700
+55% +$109M 0.1% 157
2022
Q2 		$191M Buy
936,700
+70,700
+8% +$14.5M 0.05% 316
2022
Q1 		$182M Sell
866,000
-165,500
-16% -$36M 0.03% 423
2021
Q4 		$247M Sell
1,031,500
-1,800
-0.2% -$463K 0.04% 396
2021
Q3 		$292M Sell
1,033,300
-80,700
-7% -$26.4M 0.04% 382
2021
Q2 		$386M Buy
1,114,000
+345,300
+45% +$105M 0.05% 290
2021
Q1 		$215M Sell
768,700
-446,700
-37% -$120M 0.03% 424
2020
Q4 		$298M Sell
1,215,400
-65,400
-5% -$16.9M 0.05% 301
2020
Q3 		$363M Buy
1,280,800
+201,100
+19% +$56.1M 0.07% 204
2020
Q2 		$289M Sell
1,079,700
-140,300
-12% -$42.2M 0.07% 225
2020
Q1 		$386M Sell
1,220,000
-27,300
-2% -$8.28M 0.12% 129
2019
Q4 		$370M Buy
1,247,300
+92,400
+8% +$25.6M 0.11% 144
2019
Q3 		$269M Buy
1,154,900
+175,000
+18% +$40.7M 0.09% 183
2019
Q2 		$229M Sell
979,900
-68,600
-7% -$15.8M 0.08% 196
2019
Q1 		$248M Buy
1,048,500
+8,600
+0.8% +$2.71M 0.1% 160
2018
Q4 		$313M Sell
1,039,900
-239,100
-19% -$76.3M 0.12% 133
2018
Q3 		$452M Buy
1,279,000
+329,500
+35% +$113M 0.15% 92
2018
Q2 		$276M Buy
949,500
+118,500
+14% +$33.3M 0.09% 174
2018
Q1 		$228M Sell
831,000
-421,600
-34% -$131M 0.08% 194
2017
Q4 		$399M Sell
1,252,600
-91,200
-7% -$29.3M 0.14% 109
2017
Q3 		$421M Sell
1,343,800
-322,800
-19% -$95.6M 0.16% 94
2017
Q2 		$452M Buy
1,666,600
+171,000
+11% +$45.2M 0.2% 82
2017
Q1 		$409M Buy
1,495,600
+121,600
+9% +$34.4M 0.21% 75
2016
Q4 		$390M Buy
1,374,000
+209,500
+18% +$62.1M 0.2% 77
2016
Q3 		$365M Buy
1,164,500
+373,800
+47% +$111M 0.18% 85
2016
Q2 		$191M Sell
790,700
-236,700
-23% -$62.4M 0.1% 164
2016
Q1 		$267M Sell
1,027,400
-101,000
-9% -$26.7M 0.14% 106
2015
Q4 		$346M Buy
1,128,400
+21,900
+2% +$6.29M 0.16% 109
2015
Q3 		$323M Buy
1,106,500
+441,200
+66% +$146M 0.14% 117
2015
Q2 		$269M Sell
665,300
-106,300
-14% -$42.7M 0.11% 142
2015
Q1 		$326M Sell
771,600
-489,200
-39% -$193M 0.15% 110
2014
Q4 		$428M Buy
1,260,800
+464,200
+58% +$150M 0.17% 101
2014
Q3 		$264M Buy
796,600
+26,800
+3% +$8.84M 0.1% 160
2014
Q2 		$243M Sell
769,800
-258,900
-25% -$77.9M 0.1% 147
2014
Q1 		$315M Sell
1,028,700
-67,900
-6% -$21.6M 0.15% 103
2013
Q4 		$307M Buy
1,096,600
+307,900
+39% +$79.6M 0.14% 100
2013
Q3 		$190M Sell
788,700
-72,700
-8% -$16.3M 0.1% 154
2013
Q2 		$185M Buy
+861,400
New +$184M 0.11% 134

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. 1,004 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.
  • 1,004 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.