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Merck & Co’s Alector ALEC Stock Holding History

Merck & Co’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
2026
Q1 		$7.62M Hold
3,545,719
– – 2.18% 7
2025
Q4 		$5.53M Hold
3,545,719
– – 2% 6
2025
Q3 		$10.5M Hold
3,545,719
– – 4.6% 4
2025
Q2 		$4.96M Hold
3,545,719
– – 2.3% 5
2025
Q1 		$4.36M Hold
3,545,719
– – 2.65% 5
2024
Q4 		$6.7M Buy
+3,545,719
New +$13.3M 2.6% 5

Other funds holding ALEC

TCM
TCG Crossover Management Palo Alto, California $3.5B AUM 1,165.83% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return
FCMI
Foresite Capital Management IV Larkspur, California $237M AUM 107.53% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
D.E. Shaw & Co
D.E. Shaw & Co New York $166B AUM 43.98% 1-Year Est. Return
6CM
683 Capital Management New York $1.92B AUM 85.52% 1-Year Est. Return
Balyasny Asset Management
Balyasny Asset Management Chicago, Illinois $77.1B AUM 42.89% 1-Year Est. Return
NCM
Nantahala Capital Management New Canaan, Connecticut $2.72B AUM 121.58% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

Merck & Co's ALEC Position: Q1 2026 in Review

Merck & Co held its Alector (ALEC) position steady in Q1 2026 at 3,545,719 shares worth $7.62M. The position accounts for 2.18% of the portfolio, ranked #7.

Merck & Co first reported a position in ALEC in Q4 2024 and has held it in 6 quarters since. The position peaked at $10.5M in Q3 2025. 138 funds tracked by Wall St. Rank hold ALEC as of Q1 2026.

  • Merck & Co held 3,545,719 shares of Alector worth $7.62M as of Q1 2026.
  • Merck & Co left its Alector share count unchanged in Q1 2026.
  • Alector made up 2.18% of Merck & Co's portfolio in Q1 2026, its #7 holding.
  • Merck & Co first reported a position in Alector in Q4 2024 and has held it in 6 quarters since.
  • Merck & Co's Alector position peaked at $10.5M in Q3 2025.
  • 138 funds tracked by Wall St. Rank held Alector as of Q1 2026.

Based on Merck & Co's 13F filing for Q1 2026, filed 13 May 2026.