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David M. Knott Jr’s Biogen BIIB Stock Holding History

David M. Knott Jr’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 		$864K Hold
4,000
– – 0.46% 37
2026
Q1 		$733K Sell
4,000
-2,000
-33% -$369K 0.44% 40
2025
Q4 		$1.06M Buy
6,000
+4,000
+200% +$653K 0.49% 33
2025
Q3 		$280K Buy
+2,000
New +$270K 0.11% 59

Other funds holding BIIB

Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
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
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 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

David M. Knott Jr's BIIB Position: Q2 2026 in Review

David M. Knott Jr held its Biogen (BIIB) position steady in Q2 2026 at 4,000 shares worth $864K. The position accounts for 0.46% of the portfolio, ranked #37.

David M. Knott Jr first reported a position in BIIB in Q3 2025 and has held it in 4 quarters since. The position peaked at $1.06M in Q4 2025. 1,038 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

  • David M. Knott Jr held 4,000 shares of Biogen worth $864K as of Q2 2026.
  • David M. Knott Jr left its Biogen share count unchanged in Q2 2026.
  • Biogen made up 0.46% of David M. Knott Jr's portfolio in Q2 2026, its #37 holding.
  • David M. Knott Jr first reported a position in Biogen in Q3 2025 and has held it in 4 quarters since.
  • David M. Knott Jr's Biogen position peaked at $1.06M in Q4 2025.
  • 1,038 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on David M. Knott Jr's 13F filing for Q2 2026, filed 12 Aug 2026.