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
-5,600
Closed -$1.34M – 2783
2021
Q4 		$1.34M Sell
5,600
-3,000
-35% -$771K ﹤0.01% 2292
2021
Q3 		$2.43M Sell
8,600
-1,800
-17% -$590K 0.01% 1805
2021
Q2 		$3.6M Buy
+10,400
New +$3.15M 0.01% 1415
2021
Q1 		– Sell
-13,000
Closed -$3.18M – 3821
2020
Q4 		$3.18M Sell
13,000
-10,100
-44% -$2.61M 0.01% 1198
2020
Q3 		$6.55M Buy
23,100
+18,500
+402% +$5.16M 0.02% 679
2020
Q2 		$1.23M Sell
4,600
-7,400
-62% -$2.22M 0.01% 1397
2020
Q1 		$3.8M Sell
12,000
-11,700
-49% -$3.55M 0.03% 628
2019
Q4 		$7.03M Sell
23,700
-4,800
-17% -$1.33M 0.02% 771
2019
Q3 		$6.63M Buy
28,500
+10,500
+58% +$2.44M 0.02% 728
2019
Q2 		$4.21M Buy
18,000
+12,000
+200% +$2.77M 0.01% 974
2019
Q1 		$1.42M Hold
6,000
– – ﹤0.01% 1615
2018
Q4 		$1.81M Sell
6,000
-8,000
-57% -$2.55M 0.01% 1291
2018
Q3 		$4.95M Sell
14,000
-21,700
-61% -$7.47M 0.01% 952
2018
Q2 		$10.4M Buy
35,700
+19,300
+118% +$5.43M 0.03% 654
2018
Q1 		$4.49M Buy
16,400
+11,400
+228% +$3.54M 0.01% 1015
2017
Q4 		$1.59M Sell
5,000
-13,000
-72% -$4.17M 0.01% 1634
2017
Q3 		$5.64M Buy
18,000
+6,000
+50% +$1.78M 0.02% 752
2017
Q2 		$3.26M Buy
+12,000
New +$3.17M 0.01% 1108
2017
Q1 		– Sell
-2,000
Closed -$567K – 2907
2016
Q4 		$567K Buy
+2,000
New +$593K ﹤0.01% 2430
2016
Q2 		– Sell
-5,000
Closed -$1.3M – 2910
2016
Q1 		$1.3M Sell
5,000
-27,000
-84% -$7.13M 0.01% 1445
2015
Q4 		$9.8M Buy
32,000
+31,000
+3,100% +$8.91M 0.05% 437
2015
Q3 		$292K Sell
1,000
-1,000
-50% -$330K ﹤0.01% 1799
2015
Q2 		$808K Hold
2,000
– – ﹤0.01% 1800
2015
Q1 		$844K Buy
+2,000
New +$788K ﹤0.01% 1680

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.