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 		– Sell
-53,500
Closed -$83.5K – 12891
2025
Q4 		$83.5K Sell
53,500
-10,400
-16% -$18.5K ﹤0.01% 11768
2025
Q3 		$189K Buy
63,900
+50,500
+377% +$111K ﹤0.01% 11309
2025
Q2 		$18.8K Sell
13,400
-9,800
-42% -$12.3K ﹤0.01% 12117
2025
Q1 		$28.5K Sell
23,200
-6,400
-22% -$10.4K ﹤0.01% 12868
2024
Q4 		$55.9K Buy
29,600
+24,900
+530% +$93.7K ﹤0.01% 12269
2024
Q3 		$21.9K Sell
4,700
-100
-2% -$536 ﹤0.01% 12713
2024
Q2 		$21.8K Buy
4,800
+4,600
+2,300% +$23.7K ﹤0.01% 12557
2024
Q1 		$1.2K Sell
200
-15,900
-99% -$104K ﹤0.01% 14165
2023
Q4 		$128K Buy
16,100
+200
+1% +$1.19K ﹤0.01% 10614
2023
Q3 		$103K Buy
15,900
+7,300
+85% +$47.3K ﹤0.01% 10857
2023
Q2 		$51.7K Buy
8,600
+300
+4% +$2.1K ﹤0.01% 11759
2023
Q1 		$51.4K Buy
8,300
+200
+2% +$1.63K ﹤0.01% 12106
2022
Q4 		$74.8K Buy
+8,100
New +$70.6K ﹤0.01% 11617
2022
Q2 		– Sell
-15,200
Closed -$217K – 12787
2022
Q1 		$217K Sell
15,200
-29,000
-66% -$459K ﹤0.01% 11322
2021
Q4 		$913K Sell
44,200
-17,500
-28% -$395K ﹤0.01% 8174
2021
Q3 		$1.41M Buy
61,700
+17,000
+38% +$476K ﹤0.01% 7256
2021
Q2 		$931K Sell
44,700
-1,200
-3% -$22.6K ﹤0.01% 8549
2021
Q1 		$924K Buy
45,900
+17,700
+63% +$317K ﹤0.01% 8321
2020
Q4 		$427K Sell
28,200
-3,700
-12% -$46K ﹤0.01% 8429
2020
Q3 		$336K Buy
31,900
+19,100
+149% +$309K ﹤0.01% 7939
2020
Q2 		$313K Buy
+12,800
New +$353K ﹤0.01% 7840

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.