Y-Intercept (HK)’s Biogen BIIB Stock Holding History

Y-Intercept (HK)’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	–	Sell	-134,566	Closed	-$23.7M	–	1567
2025 Q4	$23.7M	Buy	+134,566	New	+$22M	0.53%	10
2025 Q3	–	Sell	-6,318	Closed	-$793K	–	1582
2025 Q2	$793K	Buy	6,318 +4,480	+244%	+$558K	0.02%	1046
2025 Q1	$252K	Sell	1,838 -13,310	-88%	-$1.9M	0.02%	960
2024 Q4	$2.32M	Buy	15,148 +7,970	+111%	+$1.34M	0.15%	178
2024 Q3	$1.39M	Buy	7,178 +4,238	+144%	+$887K	0.09%	309
2024 Q2	$682K	Buy	+2,940	New	+$639K	0.04%	684
2023 Q2	–	Sell	-2,573	Closed	-$715K	–	1278
2023 Q1	$715K	Sell	2,573 -3,729	-59%	-$1.03M	0.08%	373
2022 Q4	$1.75M	Buy	6,302 +3,458	+122%	+$977K	0.26%	73
2022 Q3	$759K	Buy	+2,844	New	+$604K	0.08%	385
2022 Q2	–	Sell	-2,882	Closed	-$607K	–	868
2022 Q1	$607K	Buy	2,882 +185	+7%	+$40.2K	0.14%	203
2021 Q4	$647K	Buy	2,697 +1,164	+76%	+$299K	0.15%	190
2021 Q3	$434K	Sell	1,533 -12,298	-89%	-$4.03M	0.08%	369
2021 Q2	$4.79M	Buy	13,831 +11,168	+419%	+$3.38M	1.22%	4
2021 Q1	$735K	Buy	+2,663	New	+$718K	0.2%	157

Other funds holding BIIB

BlackRock New York $5.7T 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

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

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

JP Morgan Chase

JP Morgan Chase New York $1.47T AUM 27.86% 1-Year Est. Return