Two Sigma Advisers
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Two Sigma Advisers’s Alector ALEC Stock Holding History

Two Sigma Advisers’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 		– Sell
-651,800
Closed -$1.02M – 76
2025
Q4 		$1.02M Buy
651,800
+134,400
+26% +$238K ﹤0.01% 1477
2025
Q3 		$1.53M Buy
517,400
+140,400
+37% +$309K ﹤0.01% 1256
2025
Q2 		$528K Sell
377,000
-15,900
-4% -$19.9K ﹤0.01% 1726
2025
Q1 		$483K Sell
392,900
-37,000
-9% -$60.2K ﹤0.01% 1793
2024
Q4 		$813K Buy
429,900
+35,000
+9% +$132K ﹤0.01% 1558
2024
Q3 		$1.84M Sell
394,900
-84,800
-18% -$455K ﹤0.01% 1116
2024
Q2 		$2.18M Sell
479,700
-59,800
-11% -$308K ﹤0.01% 1145
2024
Q1 		$3.25M Buy
539,500
+146,400
+37% +$957K 0.01% 972
2023
Q4 		$3.14M Buy
393,100
+4,100
+1% +$24.3K 0.01% 1052
2023
Q3 		$2.52M Sell
389,000
-55,900
-13% -$362K 0.01% 1072
2023
Q2 		$2.67M Sell
444,900
-27,900
-6% -$195K 0.01% 1039
2023
Q1 		$2.93M Buy
472,800
+76,700
+19% +$624K 0.01% 1065
2022
Q4 		$3.66M Buy
396,100
+5,400
+1% +$47.1K 0.01% 910
2022
Q3 		$3.7M Sell
390,700
-20,600
-5% -$223K 0.01% 884
2022
Q2 		$4.18M Buy
411,300
+141,000
+52% +$1.41M 0.01% 857
2022
Q1 		$3.85M Sell
270,300
-13,100
-5% -$207K 0.01% 923
2021
Q4 		$5.85M Buy
283,400
+133,200
+89% +$3M 0.01% 697
2021
Q3 		$3.43M Buy
150,200
+36,700
+32% +$1.03M 0.01% 966
2021
Q2 		$2.36M Sell
113,500
-207,300
-65% -$3.91M 0.01% 1213
2021
Q1 		$6.46M Sell
320,800
-352,200
-52% -$6.31M 0.02% 751
2020
Q4 		$10.2M Buy
673,000
+174,500
+35% +$2.17M 0.03% 557
2020
Q3 		$5.25M Buy
498,500
+468,500
+1,562% +$7.58M 0.02% 744
2020
Q2 		$733K Buy
+30,000
New +$828K ﹤0.01% 1722

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

Two Sigma Advisers's ALEC Position: Q1 2026 in Review

Two Sigma Advisers sold out of Alector (ALEC) in Q1 2026, closing a stake of 651,800 shares — an estimated $1.02M sold.

Two Sigma Advisers first reported a position in ALEC in Q2 2020 and held it in 23 quarters. The position peaked at $10.2M in Q4 2020. 138 funds tracked by Wall St. Rank hold ALEC as of Q1 2026.

  • Two Sigma Advisers reported no remaining Alector position as of Q1 2026 after selling out during the quarter.
  • Two Sigma Advisers sold 651,800 Alector shares in Q1 2026, an estimated $1.02M.
  • Two Sigma Advisers first reported a position in Alector in Q2 2020 and held it in 23 quarters.
  • Two Sigma Advisers's Alector position peaked at $10.2M in Q4 2020.
  • 138 funds tracked by Wall St. Rank held Alector as of Q1 2026.

Based on Two Sigma Advisers's 13F filing for Q1 2026.