Simplex Trading
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Simplex Trading’s Alector ALEC Stock Holding History

Simplex Trading’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 		$18.9K Sell
9,400
-600
-6% -$1.29K ﹤0.01% 7156
2026
Q1 		$21.5K Sell
10,000
-13,100
-57% -$26.3K ﹤0.01% 6717
2025
Q4 		$36K Sell
23,100
-27,100
-54% -$48.1K ﹤0.01% 5943
2025
Q3 		$148K Buy
+50,200
New +$111K ﹤0.01% 5286
2025
Q1 		– Sell
-22,400
Closed -$42K – 8414
2024
Q4 		$42K Buy
22,400
+20,100
+874% +$75.7K ﹤0.01% 6039
2024
Q3 		$10K Buy
+2,300
New +$12.3K ﹤0.01% 7167
2024
Q2 		– Sell
-800
Closed -$4K – 8675
2024
Q1 		$4K Sell
800
-3,900
-83% -$25.5K ﹤0.01% 8076
2023
Q4 		$37K Buy
4,700
+900
+24% +$5.33K ﹤0.01% 6367
2023
Q3 		$24K Buy
3,800
+2,500
+192% +$16.2K ﹤0.01% 6455
2023
Q2 		$7K Hold
1,300
– – ﹤0.01% 7656
2023
Q1 		$8K Sell
1,300
-12,700
-91% -$103K ﹤0.01% 7689
2022
Q4 		$129K Buy
+14,000
New +$122K ﹤0.01% 4767
2022
Q3 		– Sell
-4,800
Closed -$48K – 9808
2022
Q2 		$48K Sell
4,800
-15,000
-76% -$150K ﹤0.01% 6530
2022
Q1 		$282K Buy
19,800
+11,400
+136% +$180K ﹤0.01% 4635
2021
Q4 		$173K Sell
8,400
-1,200
-13% -$27.1K ﹤0.01% 5393
2021
Q3 		$215K Hold
9,600
– – ﹤0.01% 5477
2021
Q2 		$199K Buy
9,600
+9,495
+9,043% +$179K ﹤0.01% 5686
2021
Q1 		$211K Sell
105
-38
-27% -$681 ﹤0.01% 4658
2020
Q4 		$216K Buy
143
+113
+377% +$1.4K ﹤0.01% 4495
2020
Q3 		$31K Buy
30
+29
+2,900% +$469 ﹤0.01% 6030
2020
Q2 		$2K Sell
1
-3
-75% -$83 ﹤0.01% 7215
2020
Q1 		$9K Buy
+4
New +$102 ﹤0.01% 6512

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
6CM
683 Capital Management New York $2.04B AUM 94.26% 1-Year Est. Return
D.E. Shaw & Co
D.E. Shaw & Co New York $210B AUM 57.28% 1-Year Est. Return

Simplex Trading's ALEC Position: Q2 2026 in Review

Simplex Trading increased its Alector (ALEC) stake by 25% in Q2 2026, buying an estimated $36.5K and bringing the position to 85,488 shares worth $172K. The position accounts for ﹤0.01% of the portfolio, ranked #4899.

Simplex Trading first reported a position in ALEC in Q1 2020 and has held it in 19 quarters since. The position peaked at $303K in Q3 2021. 141 funds tracked by Wall St. Rank hold ALEC as of Q2 2026.

  • Simplex Trading held 85,488 shares of Alector worth $172K as of Q2 2026.
  • Simplex Trading bought 17,011 Alector shares in Q2 2026, an estimated $36.5K.
  • Alector made up ﹤0.01% of Simplex Trading's portfolio in Q2 2026, its #4899 holding.
  • Simplex Trading first reported a position in Alector in Q1 2020 and has held it in 19 quarters since.
  • Simplex Trading's Alector position peaked at $303K in Q3 2021.
  • 141 funds tracked by Wall St. Rank held Alector as of Q2 2026.

Based on Simplex Trading's 13F filing for Q2 2026, filed 12 Aug 2026.