Citadel Advisors
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Citadel Advisors’s Alector ALEC Stock Holding History

Citadel Advisors’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 		$167K Sell
77,545
-16,002
-17% -$32.1K ﹤0.01% 11593
2025
Q4 		$146K Sell
93,547
-378,034
-80% -$671K ﹤0.01% 11345
2025
Q3 		$1.4M Sell
471,581
-80,239
-15% -$177K ﹤0.01% 6814
2025
Q2 		$773K Buy
551,820
+546,382
+10,047% +$684K ﹤0.01% 7647
2025
Q1 		$6.69K Sell
5,438
-419,533
-99% -$683K ﹤0.01% 13736
2024
Q4 		$803K Buy
424,971
+229,187
+117% +$863K ﹤0.01% 7499
2024
Q3 		$912K Buy
+195,784
New +$1.05M ﹤0.01% 7056
2024
Q2 		– Sell
-31,169
Closed -$160K – 14161
2024
Q1 		$188K Buy
+31,169
New +$204K ﹤0.01% 10420
2023
Q4 		– Sell
-7,960
Closed -$47.2K – 14206
2023
Q3 		$51.6K Sell
7,960
-213,191
-96% -$1.38M ﹤0.01% 11726
2023
Q2 		$1.33M Buy
+221,151
New +$1.54M ﹤0.01% 5892
2023
Q1 		– Sell
-490,838
Closed -$3.99M – 14653
2022
Q4 		$4.53M Buy
490,838
+405,014
+472% +$3.53M ﹤0.01% 4016
2022
Q3 		$812K Sell
85,824
-36,053
-30% -$390K ﹤0.01% 7441
2022
Q2 		$1.24M Buy
121,877
+16,934
+16% +$169K ﹤0.01% 6531
2022
Q1 		$1.5M Buy
104,943
+74,002
+239% +$1.17M ﹤0.01% 6732
2021
Q4 		$639K Sell
30,941
-143,229
-82% -$3.23M ﹤0.01% 9066
2021
Q3 		$3.98M Sell
174,170
-120,727
-41% -$3.38M ﹤0.01% 4759
2021
Q2 		$6.14M Buy
294,897
+253,608
+614% +$4.78M ﹤0.01% 4005
2021
Q1 		$832K Sell
41,289
-163,372
-80% -$2.93M ﹤0.01% 8552
2020
Q4 		$3.1M Sell
204,661
-89,003
-30% -$1.11M ﹤0.01% 4537
2020
Q3 		$3.09M Buy
293,664
+245,376
+508% +$3.97M ﹤0.01% 3935
2020
Q2 		$1.18M Buy
48,288
+6,515
+16% +$180K ﹤0.01% 5525
2020
Q1 		$1.01M Buy
+41,773
New +$1.06M ﹤0.01% 5326
2019
Q3 		– Sell
-41,980
Closed -$798K – 9107
2019
Q2 		$798K Buy
+41,980
New +$852K ﹤0.01% 6066

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

Citadel Advisors's ALEC Position: Q1 2026 in Review

Citadel Advisors reduced its Alector (ALEC) stake by 17% in Q1 2026, selling an estimated $32.1K and leaving 77,545 shares worth $167K. The position accounts for ﹤0.01% of the portfolio, ranked #11593.

Citadel Advisors first reported a position in ALEC in Q2 2019 and has held it in 23 quarters since. The position peaked at $6.14M in Q2 2021. 138 funds tracked by Wall St. Rank hold ALEC as of Q1 2026.

  • Citadel Advisors held 77,545 shares of Alector worth $167K as of Q1 2026.
  • Citadel Advisors sold 16,002 Alector shares in Q1 2026, an estimated $32.1K.
  • Alector made up ﹤0.01% of Citadel Advisors's portfolio in Q1 2026, its #11593 holding.
  • Citadel Advisors first reported a position in Alector in Q2 2019 and has held it in 23 quarters since.
  • Citadel Advisors's Alector position peaked at $6.14M in Q2 2021.
  • 138 funds tracked by Wall St. Rank held Alector as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.