Abacus Planning Group’s Biogen BIIB Stock Holding History

Abacus Planning Group’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	$376K	Sell	1,738 -22	-1%	-$4.21K	0.05%	176
2026 Q1	$323K	Sell	1,760 -72	-4%	-$13.3K	0.04%	191
2025 Q4	$322K	Buy	1,832 +191	+12%	+$31.2K	0.04%	189
2025 Q3	$230K	Buy	+1,641	New	+$222K	0.03%	222
2021 Q4	–	Sell	-934	Closed	-$264K	–	213
2021 Q3	$264K	Buy	934 +147	+19%	+$48.2K	0.08%	154
2021 Q2	$273K	Hold	787	–	–	0.08%	147
2021 Q1	$220K	Sell	787 -34	-4%	-$9.17K	0.07%	168
2020 Q4	$201K	Sell	821 -400	-33%	-$103K	0.06%	168
2020 Q3	$346K	Hold	1,221	–	–	0.13%	105
2020 Q2	$327K	Sell	1,221 -353	-22%	-$106K	0.13%	107
2020 Q1	$498K	Buy	1,574 +300	+24%	+$91K	0.24%	73
2019 Q4	$378K	Hold	1,274	–	–	0.17%	105
2019 Q3	$297K	Buy	+1,274	New	+$297K	0.15%	122

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

Abacus Planning Group's BIIB Position: Q2 2026 in Review

Abacus Planning Group reduced its Biogen (BIIB) stake by 1.3% in Q2 2026, selling an estimated $4.21K and leaving 1,738 shares worth $376K. The position accounts for 0.05% of the portfolio, ranked #176.

Abacus Planning Group first reported a position in BIIB in Q3 2019 and has held it in 13 quarters since. The position peaked at $498K in Q1 2020. 1,038 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

Abacus Planning Group held 1,738 shares of Biogen worth $376K as of Q2 2026.
Abacus Planning Group sold 22 Biogen shares in Q2 2026, an estimated $4.21K.
Biogen made up 0.05% of Abacus Planning Group's portfolio in Q2 2026, its #176 holding.
Abacus Planning Group first reported a position in Biogen in Q3 2019 and has held it in 13 quarters since.
Abacus Planning Group's Biogen position peaked at $498K in Q1 2020.
1,038 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on Abacus Planning Group's 13F filing for Q2 2026, filed 20 Jul 2026.