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LMR Partners’s Biogen BIIB Stock Holding History

LMR Partners’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 		$28.3M Buy
+154,300
New +$28.4M 0.06% 166
2023
Q4 		– Sell
-72,800
Closed -$18.7M – 1003
2023
Q3 		$18.7M Sell
72,800
-156,000
-68% -$41.7M 0.21% 118
2023
Q2 		$65.2M Buy
+228,800
New +$68.1M 0.72% 24

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

LMR Partners's BIIB Position: Q1 2026 in Review

LMR Partners increased its Biogen (BIIB) stake by 1,246% in Q1 2026, buying an estimated $19.8M and bringing the position to 116,131 shares worth $21.3M. The position accounts for 0.05% of the portfolio, ranked #202.

LMR Partners first reported a position in BIIB in Q2 2014 and has held it in 24 quarters since. The position peaked at $49.9M in Q2 2023. 1,002 funds tracked by Wall St. Rank hold BIIB as of Q1 2026.

  • LMR Partners held 116,131 shares of Biogen worth $21.3M as of Q1 2026.
  • LMR Partners bought 107,501 Biogen shares in Q1 2026, an estimated $19.8M.
  • Biogen made up 0.05% of LMR Partners's portfolio in Q1 2026, its #202 holding.
  • LMR Partners first reported a position in Biogen in Q2 2014 and has held it in 24 quarters since.
  • LMR Partners's Biogen position peaked at $49.9M in Q2 2023.
  • 1,002 funds tracked by Wall St. Rank held Biogen as of Q1 2026.

Based on LMR Partners's 13F filing for Q1 2026, filed 15 May 2026.