Jane Street
ALEC icon

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
2026
Q1 		$859K Sell
399,464
-594,449
-60% -$1.19M ﹤0.01% 6849
2025
Q4 		$1.55M Buy
993,913
+643,682
+184% +$1.14M ﹤0.01% 5281
2025
Q3 		$1.04M Buy
350,231
+326,279
+1,362% +$719K ﹤0.01% 6243
2025
Q2 		$33.5K Sell
23,952
-232,599
-91% -$291K ﹤0.01% 9269
2025
Q1 		$316K Buy
256,551
+11,618
+5% +$18.9K ﹤0.01% 7720
2024
Q4 		$463K Buy
244,933
+89,991
+58% +$339K ﹤0.01% 6935
2024
Q3 		$722K Buy
154,942
+30,180
+24% +$162K ﹤0.01% 6546
2024
Q2 		$566K Buy
124,762
+88,286
+242% +$454K ﹤0.01% 6820
2024
Q1 		$220K Sell
36,476
-68,949
-65% -$451K ﹤0.01% 8053
2023
Q4 		$841K Buy
105,425
+43,362
+70% +$257K ﹤0.01% 5876
2023
Q3 		$402K Sell
62,063
-16,967
-21% -$110K ﹤0.01% 6610
2023
Q2 		$475K Buy
+79,030
New +$552K ﹤0.01% 6398
2022
Q4 		– Sell
-34,223
Closed -$324K – 9050
2022
Q3 		$324K Buy
34,223
+19,510
+133% +$211K ﹤0.01% 7452
2022
Q2 		$149K Sell
14,713
-11,420
-44% -$114K ﹤0.01% 8413
2022
Q1 		$372K Sell
26,133
-6,610
-20% -$105K ﹤0.01% 8028
2021
Q4 		$677K Sell
32,743
-54,661
-63% -$1.23M ﹤0.01% 6697
2021
Q3 		$2M Buy
87,404
+33,615
+62% +$942K ﹤0.01% 4480
2021
Q2 		$1.12M Buy
53,789
+20,192
+60% +$381K ﹤0.01% 5593
2021
Q1 		$677K Sell
33,597
-15,838
-32% -$284K ﹤0.01% 6227
2020
Q4 		$748K Buy
49,435
+13,120
+36% +$163K ﹤0.01% 5125
2020
Q3 		$383K Buy
36,315
+15,540
+75% +$251K ﹤0.01% 5553
2020
Q2 		$508K Buy
20,775
+10,210
+97% +$282K ﹤0.01% 5062
2020
Q1 		$255K Buy
+10,565
New +$269K ﹤0.01% 4389

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 $6.73T AUM 46.02% 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 $526M AUM 175.27% 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.