Cinctive Capital Management’s Biogen BIIB Stock Holding History

Cinctive Capital Management’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	$15.7M	Buy	72,793 +53,444	+276%	+$10.2M	0.58%	45
2026 Q1	$3.55M	Sell	19,349 -32,824	-63%	-$6.05M	0.23%	148
2025 Q4	$9.18M	Sell	52,173 -13,664	-21%	-$2.23M	0.5%	53
2025 Q3	$9.22M	Buy	65,837 +51,035	+345%	+$6.9M	0.44%	65
2025 Q2	$1.86M	Buy	14,802 +6,908	+88%	+$861K	0.1%	228
2025 Q1	$1.08M	Buy	+7,894	New	+$1.13M	0.08%	207
2022 Q1	–	Sell	-5,034	Closed	-$1.21M	–	525
2021 Q4	$1.21M	Buy	5,034 +500	+11%	+$129K	0.05%	379
2021 Q3	$1.28M	Buy	+4,534	New	+$1.49M	0.06%	363

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

Cinctive Capital Management's BIIB Position: Q2 2026 in Review

Cinctive Capital Management increased its Biogen (BIIB) stake by 276% in Q2 2026, buying an estimated $10.2M and bringing the position to 72,793 shares worth $15.7M. The position accounts for 0.58% of the portfolio, ranked #45.

Cinctive Capital Management first reported a position in BIIB in Q3 2021 and has held it in 8 quarters since. 1,043 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

Cinctive Capital Management held 72,793 shares of Biogen worth $15.7M as of Q2 2026.
Cinctive Capital Management bought 53,444 Biogen shares in Q2 2026, an estimated $10.2M.
Biogen made up 0.58% of Cinctive Capital Management's portfolio in Q2 2026, its #45 holding.
Cinctive Capital Management first reported a position in Biogen in Q3 2021 and has held it in 8 quarters since.
1,043 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on Cinctive Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.