Westfuller Advisors’s Biogen BIIB Stock Holding History

Westfuller Advisors’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 Q2	$12.1K	Sell	56 -4	-7%	-$765	﹤0.01%	456
2026 Q1	$11K	Buy	60 +1	+2%	+$184	﹤0.01%	428
2025 Q4	$10.4K	Buy	59 +33	+127%	+$5.39K	﹤0.01%	464
2025 Q3	$3.64K	Buy	+26	New	+$3.51K	﹤0.01%	574

Other funds holding BIIB

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Primecap Management Pasadena, California $169B AUM 114.72% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return

Norges Bank Oslo, Norway $1T AUM

Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

Westfuller Advisors's BIIB Position: Q2 2026 in Review

Westfuller Advisors reduced its Biogen (BIIB) stake by 6.7% in Q2 2026, selling an estimated $765 and leaving 56 shares worth $12.1K. The position accounts for ﹤0.01% of the portfolio, ranked #456.

Westfuller Advisors first reported a position in BIIB in Q3 2025 and has held it in 4 quarters since. 1,043 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

Westfuller Advisors held 56 shares of Biogen worth $12.1K as of Q2 2026.
Westfuller Advisors sold 4 Biogen shares in Q2 2026, an estimated $765.
Biogen made up ﹤0.01% of Westfuller Advisors's portfolio in Q2 2026, its #456 holding.
Westfuller Advisors first reported a position in Biogen in Q3 2025 and has held it in 4 quarters since.
1,043 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on Westfuller Advisors's 13F filing for Q2 2026, filed 29 Jul 2026.