Vanguard Portfolio Management
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Vanguard Portfolio Management’s Biogen BIIB Stock Holding History

Vanguard Portfolio 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
Q2 		$1.43B Buy
6,604,936
+73,209
+1% +$14M 0.06% 345
2026
Q1 		$1.2B Buy
+6,531,727
New +$1.2B 0.06% 362

Other funds holding BIIB

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
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 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
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
Amundi
Amundi Paris, France $413B AUM 44.57% 1-Year Est. Return

Vanguard Portfolio Management's BIIB Position: Q2 2026 in Review

Vanguard Portfolio Management increased its Biogen (BIIB) stake by 1.1% in Q2 2026, buying an estimated $14M and bringing the position to 6,604,936 shares worth $1.43B. The position accounts for 0.06% of the portfolio, ranked #345.

Vanguard Portfolio Management first reported a position in BIIB in Q1 2026 and has held it in 2 quarters since. 981 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

  • Vanguard Portfolio Management held 6,604,936 shares of Biogen worth $1.43B as of Q2 2026.
  • Vanguard Portfolio Management bought 73,209 Biogen shares in Q2 2026, an estimated $14M.
  • Biogen made up 0.06% of Vanguard Portfolio Management's portfolio in Q2 2026, its #345 holding.
  • Vanguard Portfolio Management first reported a position in Biogen in Q1 2026 and has held it in 2 quarters since.
  • 981 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on Vanguard Portfolio Management's 13F filing for Q2 2026, filed 13 Aug 2026.