Gifford Fong Associates’s Biogen BIIB Stock Holding History

Gifford Fong Associates’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 Q4	$1.01M	Hold	5,750	–	–	0.2%	87
2025 Q3	$805K	Hold	5,750	–	–	0.17%	92
2025 Q2	$722K	Hold	5,750	–	–	0.17%	96
2025 Q1	$787K	Hold	5,750	–	–	0.2%	93
2024 Q4	$879K	Hold	5,750	–	–	0.22%	91
2024 Q3	$1.11M	Hold	5,750	–	–	0.28%	88
2024 Q2	$1.33M	Hold	5,750	–	–	0.35%	78
2024 Q1	$1.24M	Sell	5,750 -5,750	-50%	-$1.35M	0.34%	80
2023 Q4	$2.98M	Hold	11,500	–	–	0.63%	44
2023 Q3	$2.96M	Hold	11,500	–	–	0.71%	42
2023 Q2	$3.28M	Hold	11,500	–	–	0.77%	40
2023 Q1	$3.2M	Hold	11,500	–	–	0.84%	40
2022 Q4	$3.19M	Hold	11,500	–	–	0.73%	38
2022 Q3	$3.07M	Hold	11,500	–	–	0.76%	35
2022 Q2	$2.35M	Hold	11,500	–	–	0.55%	46
2022 Q1	$2.42M	Hold	11,500	–	–	0.44%	55
2021 Q4	$2.76M	Hold	11,500	–	–	0.48%	50
2021 Q3	$3.25M	Hold	11,500	–	–	0.63%	42
2021 Q2	$3.98M	Hold	11,500	–	–	0.77%	39
2021 Q1	$3.22M	Hold	11,500	–	–	0.69%	41
2020 Q4	$2.82M	Hold	11,500	–	–	0.65%	40
2020 Q3	$3.26M	Hold	11,500	–	–	0.87%	29
2020 Q2	$3.08M	Hold	11,500	–	–	0.93%	29
2020 Q1	$3.64M	Buy	11,500 +10,000	+667%	+$3.03M	1.33%	22
2019 Q4	$445K	Hold	1,500	–	–	0.13%	103
2019 Q3	$349K	Hold	1,500	–	–	0.11%	106
2019 Q2	$351K	Hold	1,500	–	–	0.12%	104
2019 Q1	$355K	Hold	1,500	–	–	0.12%	103
2018 Q4	$451K	Hold	1,500	–	–	0.17%	90
2018 Q3	$530K	Hold	1,500	–	–	0.17%	92
2018 Q2	$435K	Buy	+1,500	New	+$422K	0.15%	91

Other funds holding BIIB

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return

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

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

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

Point72 Asset Management Stamford, Connecticut $78.1B AUM 55.25% 1-Year Est. Return

Norges Bank Oslo, Norway $935B AUM

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

Gifford Fong Associates's BIIB Position: Q4 2025 in Review

Gifford Fong Associates held its Biogen (BIIB) position steady in Q4 2025 at 5,750 shares worth $1.01M. The position accounts for 0.2% of the portfolio, ranked #87.

Gifford Fong Associates first reported a position in BIIB in Q2 2018 and has held it in 31 quarters since. The position peaked at $3.98M in Q2 2021. 997 funds tracked by Wall St. Rank hold BIIB as of Q4 2025.

Gifford Fong Associates held 5,750 shares of Biogen worth $1.01M as of Q4 2025.
Gifford Fong Associates left its Biogen share count unchanged in Q4 2025.
Biogen made up 0.2% of Gifford Fong Associates's portfolio in Q4 2025, its #87 holding.
Gifford Fong Associates first reported a position in Biogen in Q2 2018 and has held it in 31 quarters since.
Gifford Fong Associates's Biogen position peaked at $3.98M in Q2 2021.
997 funds tracked by Wall St. Rank held Biogen as of Q4 2025.

Based on Gifford Fong Associates's 13F filing for Q4 2025, filed 10 Feb 2026.