Leonteq Securities AG’s Biogen BIIB Stock Holding History

Leonteq Securities AG’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
2025 Q1	–	Sell	-10,000	Closed	-$1.53M	–	1244
2024 Q4	$1.53M	Hold	10,000	–	–	0.1%	180
2024 Q3	$1.94M	Hold	10,000	–	–	0.15%	136
2024 Q2	$2.32M	Hold	10,000	–	–	0.16%	117
2024 Q1	$2.16M	Hold	10,000	–	–	0.16%	147
2023 Q4	$2.59M	Buy	+10,000	New	+$2.46M	0.15%	133
2023 Q2	–	Sell	-13,800	Closed	-$3.84M	–	1234
2023 Q1	$3.84M	Buy	+13,800	New	+$3.82M	0.18%	111

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

BPC

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

HealthInvest Partners Stockholm, Sweden $372M AUM 59.89% 1-Year Est. Return

Mirae Asset Global Investments Seoul, South Korea $67.7B AUM 51.91% 1-Year Est. Return

Leonteq Securities AG's BIIB Position: Q2 2026 in Review

Leonteq Securities AG reduced its Biogen (BIIB) stake by 19% in Q2 2026, selling an estimated $976K and leaving 21,354 shares worth $4.61M. The position accounts for 0.16% of the portfolio, ranked #101.

Leonteq Securities AG first reported a position in BIIB in Q2 2021 and has held it in 20 quarters since. The position peaked at $25.9M in Q1 2022. 284 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

Leonteq Securities AG held 21,354 shares of Biogen worth $4.61M as of Q2 2026.
Leonteq Securities AG sold 5,100 Biogen shares in Q2 2026, an estimated $976K.
Biogen made up 0.16% of Leonteq Securities AG's portfolio in Q2 2026, its #101 holding.
Leonteq Securities AG first reported a position in Biogen in Q2 2021 and has held it in 20 quarters since.
Leonteq Securities AG's Biogen position peaked at $25.9M in Q1 2022.
284 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on Leonteq Securities AG's 13F filing for Q2 2026, filed 27 Jul 2026.