PIM
BIIB icon

Plato Investment Management’s Biogen BIIB Stock Holding History

Plato Investment 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 		$906K Hold
4,939
– – 0.06% 275
2025
Q4 		$873K Hold
4,939
– – 0.06% 283
2025
Q3 		$687K Hold
4,939
– – 0.05% 315
2025
Q2 		$618K Buy
4,939
+3,869
+362% +$482K 0.05% 318
2025
Q1 		$148K Buy
1,070
+33
+3% +$4.72K 0.01% 403
2024
Q4 		$159K Buy
+1,037
New +$175K 0.01% 425
2024
Q3 		– Sell
-50
Closed -$11.6K – 550
2024
Q2 		$11.6K Sell
50
-67
-57% -$14.6K ﹤0.01% 444
2024
Q1 		$25.2K Buy
117
+53
+83% +$12.4K ﹤0.01% 404
2023
Q4 		$16.6K Buy
+64
New +$15.7K 0.02% 330

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

Plato Investment Management's BIIB Position: Q1 2026 in Review

Plato Investment Management held its Biogen (BIIB) position steady in Q1 2026 at 4,939 shares worth $906K. The position accounts for 0.06% of the portfolio, ranked #275.

Plato Investment Management first reported a position in BIIB in Q4 2023 and has held it in 9 quarters since. 1,002 funds tracked by Wall St. Rank hold BIIB as of Q1 2026.

  • Plato Investment Management held 4,939 shares of Biogen worth $906K as of Q1 2026.
  • Plato Investment Management left its Biogen share count unchanged in Q1 2026.
  • Biogen made up 0.06% of Plato Investment Management's portfolio in Q1 2026, its #275 holding.
  • Plato Investment Management first reported a position in Biogen in Q4 2023 and has held it in 9 quarters since.
  • 1,002 funds tracked by Wall St. Rank held Biogen as of Q1 2026.

Based on Plato Investment Management's 13F filing for Q1 2026, filed 5 May 2026.