Clark Estates Inc’s Biogen BIIB Stock Holding History

Clark Estates Inc’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	$3.31M	Hold	15,300	–	–	0.76%	25
2026 Q1	$2.8M	Hold	15,300	–	–	0.67%	24
2025 Q4	$2.69M	Hold	15,300	–	–	0.65%	25
2025 Q3	$2.14M	Hold	15,300	–	–	0.49%	52
2025 Q2	$1.92M	Buy	15,300 +3,504	+30%	+$437K	0.43%	46
2025 Q1	$1.61M	Sell	11,796 -4,504	-28%	-$644K	0.34%	70
2024 Q4	$2.49M	Buy	16,300 +150	+0.9%	+$25.3K	0.48%	64
2024 Q3	$3.13M	Buy	+16,150	New	+$3.38M	0.58%	54
2021 Q4	–	Sell	-8,100	Closed	-$2.29M	–	94
2021 Q3	$2.29M	Hold	8,100	–	–	0.33%	89
2021 Q2	$2.81M	Sell	8,100 -11,500	-59%	-$3.48M	0.37%	88
2021 Q1	$5.48M	Buy	19,600 +10,700	+120%	+$2.89M	0.7%	37
2020 Q4	$2.18M	Hold	8,900	–	–	0.31%	95
2020 Q3	$2.52M	Hold	8,900	–	–	0.41%	78
2020 Q2	$2.38M	Sell	8,900 -4,600	-34%	-$1.38M	0.42%	80
2020 Q1	$4.27M	Hold	13,500	–	–	0.87%	25
2019 Q4	$4.01M	Hold	13,500	–	–	0.61%	44
2019 Q3	$3.14M	Hold	13,500	–	–	0.52%	57
2019 Q2	$3.16M	Hold	13,500	–	–	0.5%	64
2019 Q1	$3.19M	Hold	13,500	–	–	0.49%	72
2018 Q4	$4.06M	Hold	13,500	–	–	0.65%	31
2018 Q3	$4.77M	Hold	13,500	–	–	0.72%	28
2018 Q2	$3.92M	Buy	+13,500	New	+$3.8M	0.59%	40

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 $3.38T AUM 44.17% 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

Clark Estates Inc's BIIB Position: Q2 2026 in Review

Clark Estates Inc held its Biogen (BIIB) position steady in Q2 2026 at 15,300 shares worth $3.31M. The position accounts for 0.76% of the portfolio, ranked #25.

Clark Estates Inc first reported a position in BIIB in Q2 2018 and has held it in 22 quarters since. The position peaked at $5.48M in Q1 2021. 1,046 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

Clark Estates Inc held 15,300 shares of Biogen worth $3.31M as of Q2 2026.
Clark Estates Inc left its Biogen share count unchanged in Q2 2026.
Biogen made up 0.76% of Clark Estates Inc's portfolio in Q2 2026, its #25 holding.
Clark Estates Inc first reported a position in Biogen in Q2 2018 and has held it in 22 quarters since.
Clark Estates Inc's Biogen position peaked at $5.48M in Q1 2021.
1,046 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on Clark Estates Inc's 13F filing for Q2 2026, filed 5 Aug 2026.