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Cubist Systematic Strategies’s Alector ALEC Stock Holding History

Cubist Systematic Strategies’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
Q3 		$296K Buy
100,067
+78,248
+359% +$172K ﹤0.01% 2515
2025
Q2 		$30.5K Buy
+21,819
New +$27.3K ﹤0.01% 2814
2024
Q3 		– Sell
-92,218
Closed -$419K – 2934
2024
Q2 		$419K Buy
92,218
+38,947
+73% +$200K ﹤0.01% 2210
2024
Q1 		$321K Sell
53,271
-109,558
-67% -$716K ﹤0.01% 2847
2023
Q4 		$1.3M Buy
162,829
+153,212
+1,593% +$908K 0.01% 1841
2023
Q3 		$62.3K Buy
+9,617
New +$62.3K ﹤0.01% 3006
2023
Q2 		– Sell
-43,010
Closed -$266K – 3435
2023
Q1 		$266K Buy
+43,010
New +$350K ﹤0.01% 3064
2022
Q4 		– Sell
-35,311
Closed -$334K – 4209
2022
Q3 		$334K Sell
35,311
-54,134
-61% -$585K ﹤0.01% 3455
2022
Q2 		$909K Sell
89,445
-32,305
-27% -$322K 0.01% 2555
2022
Q1 		$1.74M Buy
121,750
+34,309
+39% +$543K 0.01% 1599
2021
Q4 		$1.81M Buy
87,441
+13,790
+19% +$311K 0.02% 1466
2021
Q3 		$1.68M Buy
73,651
+58,697
+393% +$1.64M 0.02% 1147
2021
Q2 		$311K Buy
+14,954
New +$282K ﹤0.01% 2305
2021
Q1 		– Sell
-15,219
Closed -$230K – 2813
2020
Q4 		$230K Sell
15,219
-56,844
-79% -$706K ﹤0.01% 2163
2020
Q3 		$759K Buy
72,063
+53,423
+287% +$864K 0.01% 1493
2020
Q2 		$456K Buy
18,640
+2,161
+13% +$59.7K 0.01% 1633
2020
Q1 		$398K Buy
+16,479
New +$420K 0.01% 1369

Other funds holding ALEC

Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
RI
RTW Investments New York $10B AUM 135.35% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
MC
Merck & Co Kenilworth, New Jersey $349M AUM 146.07% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
EP
Eversept Partners New York $1.9B AUM 121.13% 1-Year Est. Return

Cubist Systematic Strategies's ALEC Position: Q3 2025 in Review

Cubist Systematic Strategies increased its Alector (ALEC) stake by 359% in Q3 2025, buying an estimated $172K and bringing the position to 100,067 shares worth $296K. The position accounts for ﹤0.01% of the portfolio, ranked #2515.

Cubist Systematic Strategies first reported a position in ALEC in Q1 2020 and has held it in 17 quarters since. The position peaked at $1.81M in Q4 2021. 149 funds tracked by Wall St. Rank hold ALEC as of Q3 2025.

  • Cubist Systematic Strategies held 100,067 shares of Alector worth $296K as of Q3 2025.
  • Cubist Systematic Strategies bought 78,248 Alector shares in Q3 2025, an estimated $172K.
  • Alector made up ﹤0.01% of Cubist Systematic Strategies's portfolio in Q3 2025, its #2515 holding.
  • Cubist Systematic Strategies first reported a position in Alector in Q1 2020 and has held it in 17 quarters since.
  • Cubist Systematic Strategies's Alector position peaked at $1.81M in Q4 2021.
  • 149 funds tracked by Wall St. Rank held Alector as of Q3 2025.

Based on Cubist Systematic Strategies's 13F filing for Q3 2025, filed 14 Nov 2025.