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Costello Asset Management’s Biogen BIIB Stock Holding History

Costello 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
2026
Q1 		$55K Hold
300
– – 0.02% 217
2025
Q4 		$52.8K Hold
300
– – 0.02% 215
2025
Q3 		$42K Hold
300
– – 0.01% 265
2025
Q2 		$37.7K Hold
300
– – 0.01% 275
2025
Q1 		$41.1K Buy
+300
New +$42.9K 0.02% 251

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

Costello Asset Management's BIIB Position: Q1 2026 in Review

Costello Asset Management held its Biogen (BIIB) position steady in Q1 2026 at 300 shares worth $55K. The position accounts for 0.02% of the portfolio, ranked #217.

Costello Asset Management first reported a position in BIIB in Q1 2025 and has held it in 5 quarters since. 1,002 funds tracked by Wall St. Rank hold BIIB as of Q1 2026.

  • Costello Asset Management held 300 shares of Biogen worth $55K as of Q1 2026.
  • Costello Asset Management left its Biogen share count unchanged in Q1 2026.
  • Biogen made up 0.02% of Costello Asset Management's portfolio in Q1 2026, its #217 holding.
  • Costello Asset Management first reported a position in Biogen in Q1 2025 and has held it in 5 quarters since.
  • 1,002 funds tracked by Wall St. Rank held Biogen as of Q1 2026.

Based on Costello Asset Management's 13F filing for Q1 2026, filed 30 Apr 2026.