Two Sigma Investments
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Two Sigma Investments’s Biogen BIIB Stock Holding History

Two Sigma Investments’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
2022
Q1 		– Sell
-5,800
Closed -$1.39M – 2784
2021
Q4 		$1.39M Sell
5,800
-15,200
-72% -$3.91M ﹤0.01% 2261
2021
Q3 		$5.94M Buy
21,000
+8,000
+62% +$2.62M 0.01% 1111
2021
Q2 		$4.5M Buy
+13,000
New +$3.94M 0.01% 1266
2021
Q1 		– Sell
-9,400
Closed -$2.3M – 3822
2020
Q4 		$2.3M Sell
9,400
-21,700
-70% -$5.6M 0.01% 1406
2020
Q3 		$8.82M Buy
31,100
+22,900
+279% +$6.39M 0.03% 552
2020
Q2 		$2.19M Sell
8,200
-20,600
-72% -$6.19M 0.01% 1051
2020
Q1 		$9.11M Buy
28,800
+400
+1% +$121K 0.07% 285
2019
Q4 		$8.43M Sell
28,400
-1,200
-4% -$333K 0.03% 698
2019
Q3 		$6.89M Buy
29,600
+10,600
+56% +$2.47M 0.02% 709
2019
Q2 		$4.44M Buy
19,000
+14,000
+280% +$3.23M 0.01% 955
2019
Q1 		$1.18M Hold
5,000
– – ﹤0.01% 1720
2018
Q4 		$1.5M Sell
5,000
-8,000
-62% -$2.55M 0.01% 1398
2018
Q3 		$4.59M Sell
13,000
-27,800
-68% -$9.57M 0.01% 989
2018
Q2 		$11.8M Buy
40,800
+23,900
+141% +$6.72M 0.04% 597
2018
Q1 		$4.63M Buy
16,900
+11,900
+238% +$3.69M 0.02% 993
2017
Q4 		$1.59M Sell
5,000
-15,400
-75% -$4.94M 0.01% 1635
2017
Q3 		$6.39M Buy
20,400
+10,100
+98% +$2.99M 0.02% 698
2017
Q2 		$2.79M Buy
+10,300
New +$2.72M 0.01% 1199
2017
Q1 		– Sell
-1,000
Closed -$284K – 2908
2016
Q4 		$284K Buy
+1,000
New +$296K ﹤0.01% 2772
2016
Q2 		– Sell
-3,000
Closed -$781K – 2911
2016
Q1 		$781K Sell
3,000
-34,000
-92% -$8.98M ﹤0.01% 1758
2015
Q4 		$11.3M Buy
+37,000
New +$10.6M 0.05% 377
2015
Q3 		– Sell
-2,000
Closed -$808K – 2213
2015
Q2 		$808K Hold
2,000
– – ﹤0.01% 1801
2015
Q1 		$844K Buy
+2,000
New +$788K ﹤0.01% 1681

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

Two Sigma Investments's BIIB Position: Q1 2026 in Review

Two Sigma Investments reduced its Biogen (BIIB) stake by 96% in Q1 2026, selling an estimated $44.7M and leaving 9,444 shares worth $1.73M. The position accounts for ﹤0.01% of the portfolio, ranked #2863.

Two Sigma Investments first reported a position in BIIB in Q2 2013 and has held it in 43 quarters since. The position peaked at $160M in Q4 2016. 1,004 funds tracked by Wall St. Rank hold BIIB as of Q1 2026.

  • Two Sigma Investments held 9,444 shares of Biogen worth $1.73M as of Q1 2026.
  • Two Sigma Investments sold 242,319 Biogen shares in Q1 2026, an estimated $44.7M.
  • Biogen made up ﹤0.01% of Two Sigma Investments's portfolio in Q1 2026, its #2863 holding.
  • Two Sigma Investments first reported a position in Biogen in Q2 2013 and has held it in 43 quarters since.
  • Two Sigma Investments's Biogen position peaked at $160M in Q4 2016.
  • 1,004 funds tracked by Wall St. Rank held Biogen as of Q1 2026.

Based on Two Sigma Investments's 13F filing for Q1 2026, filed 15 May 2026.