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Sofinnova Investments’s Biogen BIIB Stock Holding History

Sofinnova 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
2026
Q1 		$42.1M Buy
+229,521
New +$42.3M 1.6% 19
2023
Q2 		– Sell
-132,600
Closed -$36.9M – 54
2023
Q1 		$36.9M Buy
+132,600
New +$36.7M 2.36% 11
2021
Q4 		– Sell
-33,220
Closed -$9.4M – 74
2021
Q3 		$9.4M Sell
33,220
-77,380
-70% -$25.4M 0.56% 38
2021
Q2 		$38.3M Buy
+110,600
New +$33.5M 2.21% 11
2020
Q2 		– Sell
-52,628
Closed -$16.6M – 80
2020
Q1 		$16.6M Sell
52,628
-11,083
-17% -$3.36M 1.54% 16
2019
Q4 		$18.9M Buy
+63,711
New +$17.7M 1.36% 15

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

Sofinnova Investments's BIIB Position: Q1 2026 in Review

Sofinnova Investments opened a new position in Biogen (BIIB) in Q1 2026: 229,521 shares worth $42.1M. The stake represents 1.6% of the portfolio and ranks #19 among its holdings. This is a return to the name: Sofinnova Investments previously reported a position in BIIB as recently as Q1 2023.

Sofinnova Investments first reported a position in BIIB in Q4 2019 and has held it in 6 quarters since. 1,003 funds tracked by Wall St. Rank hold BIIB as of Q1 2026.

  • Sofinnova Investments held 229,521 shares of Biogen worth $42.1M as of Q1 2026.
  • Biogen was a new Sofinnova Investments position in Q1 2026.
  • Biogen made up 1.6% of Sofinnova Investments's portfolio in Q1 2026, its #19 holding.
  • Sofinnova Investments first reported a position in Biogen in Q4 2019 and has held it in 6 quarters since.
  • 1,003 funds tracked by Wall St. Rank held Biogen as of Q1 2026.

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