Jane Street
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Jane Street’s Alector ALEC Stock Holding History

Jane Street’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
2022
Q1 		– Sell
-29,500
Closed -$609K – 10205
2021
Q4 		$609K Sell
29,500
-46,600
-61% -$1.05M ﹤0.01% 6893
2021
Q3 		$1.74M Buy
76,100
+37,300
+96% +$1.04M ﹤0.01% 4762
2021
Q2 		$808K Buy
38,800
+3,100
+9% +$58.4K ﹤0.01% 6298
2021
Q1 		$719K Sell
35,700
-13,600
-28% -$244K ﹤0.01% 6112
2020
Q4 		$746K Buy
+49,300
New +$613K ﹤0.01% 5132

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
MC
Merck & Co Kenilworth, New Jersey $349M AUM 146.07% 1-Year Est. Return
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

Jane Street's ALEC Position: Q1 2026 in Review

Jane Street reduced its Alector (ALEC) stake by 60% in Q1 2026, selling an estimated $1.19M and leaving 399,464 shares worth $859K. The position accounts for ﹤0.01% of the portfolio, ranked #6849.

Jane Street first reported a position in ALEC in Q1 2020 and has held it in 23 quarters since. The position peaked at $2M in Q3 2021. 138 funds tracked by Wall St. Rank hold ALEC as of Q1 2026.

  • Jane Street held 399,464 shares of Alector worth $859K as of Q1 2026.
  • Jane Street sold 594,449 Alector shares in Q1 2026, an estimated $1.19M.
  • Alector made up ﹤0.01% of Jane Street's portfolio in Q1 2026, its #6849 holding.
  • Jane Street first reported a position in Alector in Q1 2020 and has held it in 23 quarters since.
  • Jane Street's Alector position peaked at $2M in Q3 2021.
  • 138 funds tracked by Wall St. Rank held Alector as of Q1 2026.

Based on Jane Street's 13F filing for Q1 2026, filed 12 May 2026.