TwinBeech Capital’s Biogen BIIB Stock Holding History

TwinBeech Capital’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	$202K	Sell	1,100 -1,734	-61%	-$320K	0.02%	515
2025 Q4	$499K	Buy	+2,834	New	+$463K	0.04%	402
2025 Q2	–	Sell	-64,253	Closed	-$8.79M	–	656
2025 Q1	$8.79M	Buy	+64,253	New	+$9.19M	0.16%	161
2024 Q4	–	Sell	-61,264	Closed	-$11.9M	–	627
2024 Q3	$11.9M	Buy	+61,264	New	+$12.8M	0.23%	126
2024 Q2	–	Sell	-102,251	Closed	-$22M	–	540
2024 Q1	$22M	Buy	+102,251	New	+$23.9M	0.46%	63
2023 Q4	–	Sell	-816	Closed	-$210K	–	656
2023 Q3	$210K	Buy	+816	New	+$218K	﹤0.01%	598
2023 Q2	–	Sell	-19,311	Closed	-$5.37M	–	607
2023 Q1	$5.37M	Sell	19,311 -1,541	-7%	-$426K	0.11%	230
2022 Q4	$5.77M	Buy	+20,852	New	+$5.89M	0.11%	222
2022 Q3	–	Sell	-10,663	Closed	-$2.17M	–	627
2022 Q2	$2.17M	Sell	10,663 -634	-6%	-$130K	0.1%	207
2022 Q1	$2.38M	Buy	11,297 +9,516	+534%	+$2.07M	0.1%	219
2021 Q4	$427K	Buy	+1,781	New	+$458K	0.02%	439
2020 Q3	–	Sell	-4,009	Closed	-$1.07M	–	429
2020 Q2	$1.07M	Buy	+4,009	New	+$1.21M	0.24%	134

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

TwinBeech Capital's BIIB Position: Q1 2026 in Review

TwinBeech Capital reduced its Biogen (BIIB) stake by 61% in Q1 2026, selling an estimated $320K and leaving 1,100 shares worth $202K. The position accounts for 0.02% of the portfolio, ranked #515.

TwinBeech Capital first reported a position in BIIB in Q2 2020 and has held it in 12 quarters since. The position peaked at $22M in Q1 2024. 1,002 funds tracked by Wall St. Rank hold BIIB as of Q1 2026.

TwinBeech Capital held 1,100 shares of Biogen worth $202K as of Q1 2026.
TwinBeech Capital sold 1,734 Biogen shares in Q1 2026, an estimated $320K.
Biogen made up 0.02% of TwinBeech Capital's portfolio in Q1 2026, its #515 holding.
TwinBeech Capital first reported a position in Biogen in Q2 2020 and has held it in 12 quarters since.
TwinBeech Capital's Biogen position peaked at $22M in Q1 2024.
1,002 funds tracked by Wall St. Rank held Biogen as of Q1 2026.

Based on TwinBeech Capital's 13F filing for Q1 2026, filed 15 May 2026.