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OP Asset Management’s Biogen BIIB Stock Holding History

OP 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
Q2 		$3.62M Buy
16,758
+1,495
+10% +$286K 0.04% 324
2026
Q1 		$2.8M Sell
15,263
-983
-6% -$181K 0.03% 369
2025
Q4 		$2.86M Sell
16,246
-841
-5% -$137K 0.03% 348
2025
Q3 		$2.39M Sell
17,087
-3,761
-18% -$508K 0.03% 399
2025
Q2 		$2.62M Buy
20,848
+811
+4% +$101K 0.04% 370
2025
Q1 		$2.74M Buy
+20,037
New +$2.86M 0.04% 342

Other funds holding BIIB

Pictet Asset Management
Pictet Asset Management Carouge, Switzerland $105B AUM 38.07% 1-Year Est. Return
Robeco Institutional Asset Management
Robeco Institutional Asset Management Rotterdam, Netherlands $81.4B AUM 40.71% 1-Year Est. Return
Citigroup
Citigroup New York $303B AUM 53.02% 1-Year Est. Return
AIM
Artemis Investment Management Edinburgh, United Kingdom $11.2B AUM 80.72% 1-Year Est. Return
Sumitomo Mitsui Trust Group
Sumitomo Mitsui Trust Group Minato-Ku, Tokyo, Japan $175B AUM 40.63% 1-Year Est. Return
Swedbank
Swedbank Stockholm, Sweden $116B AUM 46.87% 1-Year Est. Return
AAMU
AEGON Asset Management (UK) Edinburgh, United Kingdom $9.38B AUM 48.94% 1-Year Est. Return
Aberdeen Group
Aberdeen Group Edinburgh, United Kingdom $71.2B AUM 41.74% 1-Year Est. Return
New York State Teachers Retirement System (NYSTRS)
New York State Teachers Retirement System (NYSTRS) Albany, New York $54.2B AUM 43.77% 1-Year Est. Return
ECSS
Eurizon Capital SGR SpA Milan $37.3B AUM

OP Asset Management's BIIB Position: Q2 2026 in Review

OP Asset Management increased its Biogen (BIIB) stake by 9.8% in Q2 2026, buying an estimated $286K and bringing the position to 16,758 shares worth $3.62M. The position accounts for 0.04% of the portfolio, ranked #324.

OP Asset Management first reported a position in BIIB in Q1 2025 and has held it in 6 quarters since. 413 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

  • OP Asset Management held 16,758 shares of Biogen worth $3.62M as of Q2 2026.
  • OP Asset Management bought 1,495 Biogen shares in Q2 2026, an estimated $286K.
  • Biogen made up 0.04% of OP Asset Management's portfolio in Q2 2026, its #324 holding.
  • OP Asset Management first reported a position in Biogen in Q1 2025 and has held it in 6 quarters since.
  • 413 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on OP Asset Management's 13F filing for Q2 2026, filed 28 Jul 2026.