SEB Asset Management
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SEB Asset Management’s Biogen BIIB Stock Holding History

SEB Asset Management’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
Q3 		$11M Buy
48,555
+580
+1% +$123K 0.04% 309
2026
Q2 		$10.4M Buy
47,975
+6,106
+15% +$1.17M 0.04% 330
2026
Q1 		$7.68M Buy
+41,869
New +$7.71M 0.03% 367

Other funds holding BIIB

Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.32T AUM 44.66% 1-Year Est. Return
BlackRock
BlackRock New York $6.79T AUM 37.06% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $161B AUM 86.05% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.76T AUM
State Street
State Street Boston, Massachusetts $3.44T AUM 36.12% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.21T AUM
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.92T AUM 36.1% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.96T AUM 27.49% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.84T AUM 33.86% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.27T AUM 50.62% 1-Year Est. Return

SEB Asset Management's BIIB Position: Q3 2026 in Review

SEB Asset Management increased its Biogen (BIIB) stake by 1.2% in Q3 2026, buying an estimated $123K and bringing the position to 48,555 shares worth $11M. The position accounts for 0.04% of the portfolio, ranked #309.

SEB Asset Management first reported a position in BIIB in Q1 2026 and has held it in 3 quarters since. 881 funds tracked by Wall St. Rank hold BIIB as of Q3 2026.

  • SEB Asset Management held 48,555 shares of Biogen worth $11M as of Q3 2026.
  • SEB Asset Management bought 580 Biogen shares in Q3 2026, an estimated $123K.
  • Biogen made up 0.04% of SEB Asset Management's portfolio in Q3 2026, its #309 holding.
  • SEB Asset Management first reported a position in Biogen in Q1 2026 and has held it in 3 quarters since.
  • 881 funds tracked by Wall St. Rank held Biogen as of Q3 2026.

Based on SEB Asset Management's 13F filing for Q3 2026, filed 4 Nov 2026.