IMC Chicago
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IMC Chicago’s Biogen BIIB Stock Holding History

IMC Chicago’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
Q2 		$4.46M Buy
+20,649
New +$3.95M ﹤0.01% 2213
2026
Q1 		– Sell
-19,011
Closed -$3.5M – 5709
2025
Q4 		$3.35M Buy
+19,011
New +$3.11M ﹤0.01% 2034
2022
Q1 		– Sell
-10,222
Closed -$2.22M – 1085
2021
Q4 		$2.45M Sell
10,222
-1,243
-11% -$320K ﹤0.01% 767
2021
Q3 		$3.24M Sell
11,465
-12,940
-53% -$4.24M ﹤0.01% 728
2021
Q2 		$8.45M Buy
+24,405
New +$7.39M 0.01% 488
2021
Q1 		– Sell
-11,998
Closed -$3.24M – 1043
2020
Q4 		$2.94M Buy
+11,998
New +$3.1M ﹤0.01% 654

Other funds holding BIIB

Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $169B AUM 114.72% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return
Norges Bank
Norges Bank Oslo, Norway $1T AUM
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

IMC Chicago's BIIB Position: Q2 2026 in Review

IMC Chicago opened a new position in Biogen (BIIB) in Q2 2026: 20,649 shares worth $4.46M. The stake represents ﹤0.01% of the portfolio and ranks #2213 among its holdings. This is a return to the name: IMC Chicago previously reported a position in BIIB as recently as Q4 2025.

IMC Chicago first reported a position in BIIB in Q4 2020 and has held it in 6 quarters since. The position peaked at $8.45M in Q2 2021. 1,043 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

  • IMC Chicago held 20,649 shares of Biogen worth $4.46M as of Q2 2026.
  • Biogen was a new IMC Chicago position in Q2 2026.
  • Biogen made up ﹤0.01% of IMC Chicago's portfolio in Q2 2026, its #2213 holding.
  • IMC Chicago first reported a position in Biogen in Q4 2020 and has held it in 6 quarters since.
  • IMC Chicago's Biogen position peaked at $8.45M in Q2 2021.
  • 1,043 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on IMC Chicago's 13F filing for Q2 2026, filed 6 Aug 2026.