Optiver Holding’s Biogen BIIB Stock Holding History

Optiver Holding’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	$7.15K	Buy	+39	New	+$7.19K	﹤0.01%	1309
2025 Q3	–	Sell	-16,550	Closed	-$2.08M	–	2691
2025 Q2	$2.08M	Buy	+16,550	New	+$2.06M	﹤0.01%	272
2024 Q1	–	Sell	-1	Closed	-$259	–	678
2023 Q4	$259	Buy	+1	New	+$246	﹤0.01%	479
2022 Q4	–	Sell	-64	Closed	-$17K	–	446
2022 Q3	$17K	Buy	+64	New	+$13.6K	﹤0.01%	337
2021 Q3	–	Sell	-60	Closed	-$21K	–	725
2021 Q2	$21K	Buy	+60	New	+$18.2K	﹤0.01%	359

Other funds holding BIIB

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

Primecap Management Pasadena, California $127B AUM 44.11% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

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 Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return

Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return

Optiver Holding's BIIB Position: Q1 2026 in Review

Optiver Holding opened a new position in Biogen (BIIB) in Q1 2026: 39 shares worth $7.15K. The stake represents ﹤0.01% of the portfolio and ranks #1309 among its holdings. This is a return to the name: Optiver Holding previously reported a position in BIIB as recently as Q2 2025.

Optiver Holding first reported a position in BIIB in Q2 2021 and has held it in 5 quarters since. The position peaked at $2.08M in Q2 2025. 1,002 funds tracked by Wall St. Rank hold BIIB as of Q1 2026.

Optiver Holding held 39 shares of Biogen worth $7.15K as of Q1 2026.
Biogen was a new Optiver Holding position in Q1 2026.
Biogen made up ﹤0.01% of Optiver Holding's portfolio in Q1 2026, its #1309 holding.
Optiver Holding first reported a position in Biogen in Q2 2021 and has held it in 5 quarters since.
Optiver Holding's Biogen position peaked at $2.08M in Q2 2025.
1,002 funds tracked by Wall St. Rank held Biogen as of Q1 2026.

Based on Optiver Holding's 13F filing for Q1 2026, filed 15 May 2026.