Birchview Capital’s Biogen BIIB Stock Holding History

Birchview 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	$917K	Buy	+5,000	New	+$921K	0.52%	42
2022 Q2	–	Sell	-10,100	Closed	-$2.06M	–	63
2022 Q1	$2.13M	Sell	10,100 -2,500	-20%	-$544K	1.53%	11
2021 Q4	$3.02M	Hold	12,600	–	–	1.95%	10
2021 Q3	$3.57M	Buy	12,600 +500	+4%	+$164K	2.43%	7
2021 Q2	$4.19M	Hold	12,100	–	–	2.51%	7
2021 Q1	$3.38M	Hold	12,100	–	–	2.01%	9
2020 Q4	$2.96M	Buy	12,100 +1,100	+10%	+$284K	1.71%	11
2020 Q3	$3.12M	Hold	11,000	–	–	2.08%	8
2020 Q2	$2.94M	Hold	11,000	–	–	1.78%	9
2020 Q1	$3.48M	Buy	11,000 +6,000	+120%	+$1.82M	3.09%	6
2019 Q4	$1.48M	Hold	5,000	–	–	1.08%	12
2019 Q3	$1.16M	Hold	5,000	–	–	0.78%	11
2019 Q2	$1.17M	Buy	5,000 +2,500	+100%	+$577K	0.71%	15
2019 Q1	$591K	Hold	2,500	–	–	0.37%	25
2018 Q4	$752K	Buy	2,500 +500	+25%	+$160K	0.71%	18
2018 Q3	$707K	Hold	2,000	–	–	0.46%	22
2018 Q2	$580K	Hold	2,000	–	–	0.39%	27
2018 Q1	$548K	Buy	2,000 +1,000	+100%	+$310K	0.36%	26
2017 Q4	$319K	Hold	1,000	–	–	0.19%	29
2017 Q3	$313K	Hold	1,000	–	–	0.16%	28
2017 Q2	$271K	Hold	1,000	–	–	0.14%	29
2017 Q1	$273K	Hold	1,000	–	–	0.15%	33
2016 Q4	$284K	Hold	1,000	–	–	0.17%	29
2016 Q3	$313K	Hold	1,000	–	–	0.18%	28
2016 Q2	$242K	Hold	1,000	–	–	0.18%	29
2016 Q1	$260K	Hold	1,000	–	–	0.19%	32
2015 Q4	$306K	Hold	1,000	–	–	0.18%	32
2015 Q3	$292K	Hold	1,000	–	–	0.19%	34
2015 Q2	$404K	Sell	1,000 -400	-29%	-$161K	0.21%	30
2015 Q1	$591K	Hold	1,400	–	–	0.31%	26
2014 Q4	$475K	Buy	+1,400	New	+$453K	0.28%	26

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

Birchview Capital's BIIB Position: Q1 2026 in Review

Birchview Capital opened a new position in Biogen (BIIB) in Q1 2026: 5,000 shares worth $917K. The stake represents 0.52% of the portfolio and ranks #42 among its holdings. This is a return to the name: Birchview Capital previously reported a position in BIIB as recently as Q1 2022.

Birchview Capital first reported a position in BIIB in Q4 2014 and has held it in 31 quarters since. The position peaked at $4.19M in Q2 2021. 1,002 funds tracked by Wall St. Rank hold BIIB as of Q1 2026.

Birchview Capital held 5,000 shares of Biogen worth $917K as of Q1 2026.
Biogen was a new Birchview Capital position in Q1 2026.
Biogen made up 0.52% of Birchview Capital's portfolio in Q1 2026, its #42 holding.
Birchview Capital first reported a position in Biogen in Q4 2014 and has held it in 31 quarters since.
Birchview Capital's Biogen position peaked at $4.19M in Q2 2021.
1,002 funds tracked by Wall St. Rank held Biogen as of Q1 2026.

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