Group One Trading
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Group One Trading’s Alector ALEC Stock Holding History

Group One 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 		$1K Sell
500
-54,900
-99% -$118K ﹤0.01% 7181
2026
Q1 		$119K Sell
55,400
-2,200
-4% -$4.42K ﹤0.01% 4580
2025
Q4 		$89.9K Buy
57,600
+56,000
+3,500% +$99.4K ﹤0.01% 5086
2025
Q3 		$4.74K Sell
1,600
-39,800
-96% -$87.7K ﹤0.01% 7571
2025
Q2 		$58K Sell
41,400
-31,200
-43% -$39.1K ﹤0.01% 5456
2025
Q1 		$89.3K Buy
72,600
+28,400
+64% +$46.2K ﹤0.01% 4679
2024
Q4 		$83.5K Buy
+44,200
New +$166K ﹤0.01% 4659
2024
Q2 		– Sell
-1,600
Closed -$9.63K – 6644
2024
Q1 		$9.63K Sell
1,600
-700
-30% -$4.58K ﹤0.01% 5886
2023
Q4 		$18.4K Sell
2,300
-1,500
-39% -$8.89K ﹤0.01% 5807
2023
Q3 		$24.6K Buy
3,800
+1,200
+46% +$7.77K ﹤0.01% 5721
2023
Q2 		$15.6K Buy
2,600
+2,300
+767% +$16.1K ﹤0.01% 6144
2023
Q1 		$1.86K Sell
300
-5,000
-94% -$40.7K ﹤0.01% 6632
2022
Q4 		$48.9K Sell
5,300
-1,100
-17% -$9.59K ﹤0.01% 5008
2022
Q3 		$61K Hold
6,400
– – ﹤0.01% 5227
2022
Q2 		$65K Sell
6,400
-700
-10% -$6.98K ﹤0.01% 5338
2022
Q1 		$101K Buy
7,100
+2,900
+69% +$45.9K ﹤0.01% 5478
2021
Q4 		$87K Sell
4,200
-4,600
-52% -$104K ﹤0.01% 5850
2021
Q3 		$201K Sell
8,800
-3,900
-31% -$109K ﹤0.01% 5162
2021
Q2 		$265K Buy
12,700
+10,400
+452% +$196K ﹤0.01% 4917
2021
Q1 		$46K Buy
2,300
+600
+35% +$10.8K ﹤0.01% 6277
2020
Q4 		$26K Buy
+1,700
New +$21.1K ﹤0.01% 5363
2020
Q3 		– Sell
-100
Closed -$2K – 6029
2020
Q2 		$2K Hold
100
– – ﹤0.01% 5536
2020
Q1 		$2K Buy
+100
New +$2.55K ﹤0.01% 4949

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

Group One Trading's ALEC Position: Q2 2026 in Review

Group One Trading opened a new position in Alector (ALEC) in Q2 2026: 25,208 shares worth $50.7K. The stake represents ﹤0.01% of the portfolio and ranks #5388 among its holdings. This is a return to the name: Group One Trading previously reported a position in ALEC as recently as Q3 2025.

Group One Trading first reported a position in ALEC in Q3 2020 and has held it in 13 quarters since. The position peaked at $883K in Q1 2022. 140 funds tracked by Wall St. Rank hold ALEC as of Q2 2026.

  • Group One Trading held 25,208 shares of Alector worth $50.7K as of Q2 2026.
  • Alector was a new Group One Trading position in Q2 2026.
  • Alector made up ﹤0.01% of Group One Trading's portfolio in Q2 2026, its #5388 holding.
  • Group One Trading first reported a position in Alector in Q3 2020 and has held it in 13 quarters since.
  • Group One Trading's Alector position peaked at $883K in Q1 2022.
  • 140 funds tracked by Wall St. Rank held Alector as of Q2 2026.

Based on Group One Trading's 13F filing for Q2 2026, filed 14 Aug 2026.