Avanza Fonder’s Biogen BIIB Stock Holding History

Avanza Fonder’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	$2.54M	Sell	11,760 -2,861	-20%	-$547K	0.06%	252
2026 Q1	$2.68M	Sell	14,621 -122	-0.8%	-$22.5K	0.07%	216
2025 Q4	$2.59M	Sell	14,743 -544	-4%	-$88.9K	0.07%	232
2025 Q3	$2.14M	Hold	15,287	–	–	0.06%	243
2025 Q2	$1.92M	Hold	15,287	–	–	0.06%	247
2025 Q1	$2.01M	Sell	15,287 -249	-2%	-$35.6K	0.07%	238
2024 Q4	$2.38M	Buy	+15,536	New	+$2.62M	0.07%	221

Other funds holding BIIB

Robeco Institutional Asset Management Rotterdam, Netherlands $81.4B AUM 40.71% 1-Year Est. Return

AIM

Artemis Investment Management Edinburgh, United Kingdom $11.2B AUM 80.72% 1-Year Est. Return

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

New York State Teachers Retirement System (NYSTRS) Albany, New York $54.2B AUM 43.77% 1-Year Est. Return

ADEF

Adams Diversified Equity Fund Baltimore, Maryland $3.27B AUM 45.57% 1-Year Est. Return

Handelsbanken Fonder Stockholm, Sweden $35.1B AUM 47.76% 1-Year Est. Return

EAM

Erste Asset Management Vienna, Austria $12.9B AUM 52.69% 1-Year Est. Return

BPC

Banque Pictet & Cie Geneva 73, Switzerland $16B AUM 29.1% 1-Year Est. Return

Asset Management One Tokyo, Japan $39B AUM 37.51% 1-Year Est. Return

Avanza Fonder's BIIB Position: Q2 2026 in Review

Avanza Fonder reduced its Biogen (BIIB) stake by 20% in Q2 2026, selling an estimated $547K and leaving 11,760 shares worth $2.54M. The position accounts for 0.06% of the portfolio, ranked #252.

Avanza Fonder first reported a position in BIIB in Q4 2024 and has held it in 7 quarters since. The position peaked at $2.68M in Q1 2026. 334 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

Avanza Fonder held 11,760 shares of Biogen worth $2.54M as of Q2 2026.
Avanza Fonder sold 2,861 Biogen shares in Q2 2026, an estimated $547K.
Biogen made up 0.06% of Avanza Fonder's portfolio in Q2 2026, its #252 holding.
Avanza Fonder first reported a position in Biogen in Q4 2024 and has held it in 7 quarters since.
Avanza Fonder's Biogen position peaked at $2.68M in Q1 2026.
334 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on Avanza Fonder's 13F filing for Q2 2026, filed 17 Jul 2026.