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Picton Mahoney Asset Management’s Biogen BIIB Stock Holding History

Picton Mahoney 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
2020
Q2 		– Sell
-32,000
Closed -$10.1M – 319
2020
Q1 		$10.1M Buy
+32,000
New +$9.71M 0.57% 42

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

Picton Mahoney Asset Management's BIIB Position: Q2 2026 in Review

Picton Mahoney Asset Management opened a new position in Biogen (BIIB) in Q2 2026: 46,536 shares worth $10.1M. The stake represents 0.07% of the portfolio and ranks #243 among its holdings. This is a return to the name: Picton Mahoney Asset Management previously reported a position in BIIB as recently as Q2 2023.

Picton Mahoney Asset Management first reported a position in BIIB in Q2 2014 and has held it in 6 quarters since. The position peaked at $31.3M in Q2 2015. 1,046 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

  • Picton Mahoney Asset Management held 46,536 shares of Biogen worth $10.1M as of Q2 2026.
  • Biogen was a new Picton Mahoney Asset Management position in Q2 2026.
  • Biogen made up 0.07% of Picton Mahoney Asset Management's portfolio in Q2 2026, its #243 holding.
  • Picton Mahoney Asset Management first reported a position in Biogen in Q2 2014 and has held it in 6 quarters since.
  • Picton Mahoney Asset Management's Biogen position peaked at $31.3M in Q2 2015.
  • 1,046 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on Picton Mahoney Asset Management's 13F filing for Q2 2026, filed 13 Aug 2026.