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Jefferies Financial Group’s Biogen BIIB Stock Holding History

Jefferies Financial Group’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
2025
Q1 		– Sell
-12,800
Closed -$1.96M – 1635
2024
Q4 		$1.96M Buy
+12,800
New +$2.16M 0.01% 673
2023
Q3 		– Sell
-3,200
Closed -$912K – 1628
2023
Q2 		$912K Sell
3,200
-1,800
-36% -$536K 0.01% 955
2023
Q1 		$1.39M Sell
5,000
-20,000
-80% -$5.53M 0.01% 772
2022
Q4 		$6.92M Buy
+25,000
New +$7.06M 0.05% 310

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 $3.38T AUM 44.17% 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

Jefferies Financial Group's BIIB Position: Q2 2026 in Review

Jefferies Financial Group increased its Biogen (BIIB) stake by 25% in Q2 2026, buying an estimated $1.06M and bringing the position to 27,463 shares worth $5.93M. The position accounts for 0.04% of the portfolio, ranked #352.

Jefferies Financial Group first reported a position in BIIB in Q1 2017 and has held it in 22 quarters since. The position peaked at $12.8M in Q4 2024. 1,046 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

  • Jefferies Financial Group held 27,463 shares of Biogen worth $5.93M as of Q2 2026.
  • Jefferies Financial Group bought 5,561 Biogen shares in Q2 2026, an estimated $1.06M.
  • Biogen made up 0.04% of Jefferies Financial Group's portfolio in Q2 2026, its #352 holding.
  • Jefferies Financial Group first reported a position in Biogen in Q1 2017 and has held it in 22 quarters since.
  • Jefferies Financial Group's Biogen position peaked at $12.8M in Q4 2024.
  • 1,046 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on Jefferies Financial Group's 13F filing for Q2 2026, filed 17 Aug 2026.