Susquehanna International Group
BIIB icon

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 		$146M Sell
798,700
-154,800
-16% -$28.5M 0.02% 636
2025
Q4 		$168M Buy
953,500
+44,600
+5% +$7.29M 0.02% 607
2025
Q3 		$127M Sell
908,900
-125,200
-12% -$16.9M 0.01% 755
2025
Q2 		$130M Sell
1,034,100
-96,300
-9% -$12M 0.02% 622
2025
Q1 		$155M Buy
1,130,400
+601,100
+114% +$85.9M 0.03% 474
2024
Q4 		$80.9M Buy
529,300
+98,500
+23% +$16.6M 0.01% 834
2024
Q3 		$83.5M Buy
430,800
+108,800
+34% +$22.8M 0.01% 745
2024
Q2 		$74.6M Sell
322,000
-203,700
-39% -$44.3M 0.01% 737
2024
Q1 		$113M Buy
525,700
+11,900
+2% +$2.79M 0.02% 608
2023
Q4 		$133M Buy
513,800
+141,800
+38% +$34.8M 0.03% 561
2023
Q3 		$95.6M Sell
372,000
-120,300
-24% -$32.2M 0.02% 639
2023
Q2 		$140M Sell
492,300
-272,200
-36% -$81M 0.03% 461
2023
Q1 		$213M Sell
764,500
-619,200
-45% -$171M 0.05% 338
2022
Q4 		$383M Sell
1,383,700
-188,700
-12% -$53.3M 0.1% 177
2022
Q3 		$420M Buy
1,572,400
+694,000
+79% +$147M 0.11% 143
2022
Q2 		$179M Buy
878,400
+29,400
+3% +$6.01M 0.04% 334
2022
Q1 		$179M Sell
849,000
-466,300
-35% -$101M 0.03% 430
2021
Q4 		$316M Sell
1,315,300
-41,100
-3% -$10.6M 0.05% 336
2021
Q3 		$384M Buy
1,356,400
+164,700
+14% +$54M 0.05% 313
2021
Q2 		$413M Sell
1,191,700
-2,000
-0.2% -$606K 0.06% 271
2021
Q1 		$334M Sell
1,193,700
-656,100
-35% -$177M 0.05% 301
2020
Q4 		$453M Buy
1,849,800
+386,300
+26% +$99.7M 0.07% 201
2020
Q3 		$415M Sell
1,463,500
-56,900
-4% -$15.9M 0.08% 182
2020
Q2 		$407M Buy
1,520,400
+352,000
+30% +$106M 0.1% 166
2020
Q1 		$370M Sell
1,168,400
-327,000
-22% -$99.2M 0.12% 136
2019
Q4 		$444M Buy
1,495,400
+139,200
+10% +$38.6M 0.13% 124
2019
Q3 		$316M Buy
1,356,200
+30,900
+2% +$7.2M 0.11% 155
2019
Q2 		$310M Sell
1,325,300
-493,100
-27% -$114M 0.11% 143
2019
Q1 		$430M Buy
1,818,400
+616,100
+51% +$194M 0.18% 82
2018
Q4 		$362M Sell
1,202,300
-173,900
-13% -$55.5M 0.14% 109
2018
Q3 		$486M Buy
1,376,200
+288,900
+27% +$99.5M 0.16% 85
2018
Q2 		$316M Buy
1,087,300
+45,700
+4% +$12.8M 0.11% 154
2018
Q1 		$285M Sell
1,041,600
-327,800
-24% -$102M 0.1% 155
2017
Q4 		$436M Buy
1,369,400
+33,300
+2% +$10.7M 0.15% 95
2017
Q3 		$418M Sell
1,336,100
-214,600
-14% -$63.5M 0.16% 96
2017
Q2 		$421M Sell
1,550,700
-218,200
-12% -$57.7M 0.18% 88
2017
Q1 		$484M Buy
1,768,900
+377,800
+27% +$107M 0.24% 58
2016
Q4 		$394M Sell
1,391,100
-314,300
-18% -$93.2M 0.2% 76
2016
Q3 		$534M Buy
1,705,400
+158,800
+10% +$47M 0.26% 51
2016
Q2 		$374M Buy
1,546,600
+28,200
+2% +$7.43M 0.2% 75
2016
Q1 		$395M Sell
1,518,400
-24,600
-2% -$6.5M 0.21% 74
2015
Q4 		$473M Sell
1,543,000
-633,200
-29% -$182M 0.22% 71
2015
Q3 		$635M Buy
2,176,200
+536,800
+33% +$177M 0.27% 45
2015
Q2 		$662M Buy
1,639,400
+261,100
+19% +$105M 0.28% 38
2015
Q1 		$582M Sell
1,378,300
-138,900
-9% -$54.7M 0.26% 44
2014
Q4 		$515M Buy
1,517,200
+135,500
+10% +$43.8M 0.2% 71
2014
Q3 		$457M Buy
1,381,700
+250,300
+22% +$82.5M 0.18% 79
2014
Q2 		$357M Sell
1,131,400
-190,600
-14% -$57.4M 0.15% 88
2014
Q1 		$404M Buy
1,322,000
+572,800
+76% +$182M 0.19% 76
2013
Q4 		$210M Sell
749,200
-55,400
-7% -$14.3M 0.1% 148
2013
Q3 		$194M Buy
804,600
+72,900
+10% +$16.3M 0.1% 150
2013
Q2 		$157M Buy
+731,700
New +$156M 0.09% 164

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.