6CM
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683 Capital Management’s Alector ALEC Stock Holding History

683 Capital Management’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
Q2 		$6.43M Hold
3,200,000
– – 0.32% 65
2026
Q1 		$6.88M Sell
3,200,000
-150,000
-4% -$301K 0.36% 59
2025
Q4 		$5.23M Buy
3,350,000
+2,350,000
+235% +$4.17M 0.23% 78
2025
Q3 		$2.96M Buy
+1,000,000
New +$2.2M 0.15% 97

Other funds holding ALEC

TCM
TCG Crossover Management Palo Alto, California $4.16B AUM 983.43% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $84.2B AUM 55.88% 1-Year Est. Return
NCM
Nantahala Capital Management New Canaan, Connecticut $3.01B AUM 119.46% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
KCM
Kynam Capital Management Princeton, New Jersey $1.81B AUM 192.15% 1-Year Est. Return
MC
Merck & Co Rahway, New Jersey $526M AUM 175.27% 1-Year Est. Return
Balyasny Asset Management
Balyasny Asset Management Chicago, Illinois $80.2B AUM 51.53% 1-Year Est. Return
D.E. Shaw & Co
D.E. Shaw & Co New York $210B AUM 57.28% 1-Year Est. Return
ACM
ADAR1 Capital Management Austin, Texas $2.19B AUM 374.99% 1-Year Est. Return

683 Capital Management's ALEC Position: Q2 2026 in Review

683 Capital Management held its Alector (ALEC) position steady in Q2 2026 at 3,200,000 shares worth $6.43M. The position accounts for 0.32% of the portfolio, ranked #65.

683 Capital Management first reported a position in ALEC in Q3 2025 and has held it in 4 quarters since. The position peaked at $6.88M in Q1 2026. 141 funds tracked by Wall St. Rank hold ALEC as of Q2 2026.

  • 683 Capital Management held 3,200,000 shares of Alector worth $6.43M as of Q2 2026.
  • 683 Capital Management left its Alector share count unchanged in Q2 2026.
  • Alector made up 0.32% of 683 Capital Management's portfolio in Q2 2026, its #65 holding.
  • 683 Capital Management first reported a position in Alector in Q3 2025 and has held it in 4 quarters since.
  • 683 Capital Management's Alector position peaked at $6.88M in Q1 2026.
  • 141 funds tracked by Wall St. Rank held Alector as of Q2 2026.

Based on 683 Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.