Ghost Tree Capital’s Biogen BIIB Stock Holding History

Ghost Tree Capital’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
2016 Q4	–	Sell	-65,000	Closed	-$20.3M	–	72
2016 Q3	$20.3M	Buy	+65,000	New	+$19.3M	3.3%	6

Other funds holding BIIB

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

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

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 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

JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return

Deutsche Bank Frankfurt Am Main Ge, Germany $303B AUM 30.15% 1-Year Est. Return

ClearBridge Investments New York $115B AUM 24.78% 1-Year Est. Return

D.E. Shaw & Co New York $166B AUM 43.98% 1-Year Est. Return

Ghost Tree Capital's BIIB Position: Q4 2022 in Review

Ghost Tree Capital sold out of Biogen (BIIB) in Q4 2022, closing a stake of 3,750 shares — an estimated $1M sold.

Ghost Tree Capital first reported a position in BIIB in Q4 2013 and held it in 13 quarters. The position peaked at $12.1M in Q2 2015. 1,031 funds tracked by Wall St. Rank hold BIIB as of Q4 2022.

Ghost Tree Capital reported no remaining Biogen position as of Q4 2022 after selling out during the quarter.
Ghost Tree Capital sold 3,750 Biogen shares in Q4 2022, an estimated $1M.
Ghost Tree Capital first reported a position in Biogen in Q4 2013 and held it in 13 quarters.
Ghost Tree Capital's Biogen position peaked at $12.1M in Q2 2015.
1,031 funds tracked by Wall St. Rank held Biogen as of Q4 2022.

Based on Ghost Tree Capital's 13F filing for Q4 2022, filed 14 Feb 2023.