S&CO Inc’s Biogen BIIB Stock Holding History

S&CO 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
2025 Q2	–	Sell	-2,572	Closed	-$351K	–	224
2025 Q1	$351K	Buy	+2,572	New	+$368K	0.02%	183

Other funds holding BIIB

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

Primecap Management Pasadena, California $127B AUM 44.11% 1-Year Est. Return

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

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

Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

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

Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return

Norges Bank Oslo, Norway $935B AUM

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

S&CO Inc's BIIB Position: Q2 2025 in Review

S&CO Inc sold out of Biogen (BIIB) in Q2 2025, closing a stake of 2,572 shares — an estimated $351K sold.

S&CO Inc first reported a position in BIIB in Q1 2025 and held it in 1 quarter. The position peaked at $351K in Q1 2025. 866 funds tracked by Wall St. Rank hold BIIB as of Q2 2025.

S&CO Inc reported no remaining Biogen position as of Q2 2025 after selling out during the quarter.
S&CO Inc sold 2,572 Biogen shares in Q2 2025, an estimated $351K.
S&CO Inc first reported a position in Biogen in Q1 2025 and held it in 1 quarter.
S&CO Inc's Biogen position peaked at $351K in Q1 2025.
866 funds tracked by Wall St. Rank held Biogen as of Q2 2025.

Based on S&CO Inc's 13F filing for Q2 2025, filed 7 Aug 2025.