RTW Investments’s Alector ALEC Stock Holding History

RTW Investments’s Portfolio ALEC Stock Details ALEC Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q4	–	Sell	-6,990,806	Closed	-$20.7M	–	94
2025 Q3	$20.7M	Buy	+6,990,806	New	+$15.4M	0.26%	54

Other funds holding ALEC

TCM

TCG Crossover Management Palo Alto, California $4.16B AUM 983.43% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

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

FCMI

Foresite Capital Management IV Larkspur, California $290M AUM 143.88% 1-Year Est. Return

Merck & Co Rahway, New Jersey $526M AUM 175.27% 1-Year Est. Return

Acadian Asset Management Boston, Massachusetts $84.2B AUM 55.88% 1-Year Est. Return

6CM

683 Capital Management New York $2.04B AUM 94.26% 1-Year Est. Return

Balyasny Asset Management Chicago, Illinois $80.2B AUM 51.53% 1-Year Est. Return

D.E. Shaw & Co New York $210B AUM 57.28% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

RTW Investments's ALEC Position: Q4 2025 in Review

RTW Investments sold out of Alector (ALEC) in Q4 2025, closing a stake of 6,990,806 shares — an estimated $20.7M sold.

RTW Investments first reported a position in ALEC in Q3 2025 and held it in 1 quarter. The position peaked at $20.7M in Q3 2025. 131 funds tracked by Wall St. Rank hold ALEC as of Q4 2025.

RTW Investments reported no remaining Alector position as of Q4 2025 after selling out during the quarter.
RTW Investments sold 6,990,806 Alector shares in Q4 2025, an estimated $20.7M.
RTW Investments first reported a position in Alector in Q3 2025 and held it in 1 quarter.
RTW Investments's Alector position peaked at $20.7M in Q3 2025.
131 funds tracked by Wall St. Rank held Alector as of Q4 2025.

Based on RTW Investments's 13F filing for Q4 2025, filed 17 Feb 2026.