Ken Griffin
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Ken Griffin’s Alector ALEC Stock Holding History

Ken Griffin’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 		$68.2K Sell
31,700
-1,200
-4% -$2.41K ﹤0.01% 12266
2025
Q4 		$51.3K Buy
32,900
+16,100
+96% +$28.6K ﹤0.01% 12020
2025
Q3 		$49.7K Sell
16,800
-13,000
-44% -$28.6K ﹤0.01% 12216
2025
Q2 		$41.7K Sell
29,800
-26,600
-47% -$33.3K ﹤0.01% 11860
2025
Q1 		$69.4K Buy
56,400
+20,900
+59% +$34K ﹤0.01% 11923
2024
Q4 		$67.1K Buy
35,500
+18,800
+113% +$70.8K ﹤0.01% 12036
2024
Q3 		$77.8K Buy
16,700
+8,300
+99% +$44.5K ﹤0.01% 11446
2024
Q2 		$38.1K Sell
8,400
-2,500
-23% -$12.9K ﹤0.01% 12031
2024
Q1 		$65.6K Sell
10,900
-20,000
-65% -$131K ﹤0.01% 11895
2023
Q4 		$247K Buy
30,900
+7,900
+34% +$46.8K ﹤0.01% 9548
2023
Q3 		$149K Sell
23,000
-6,800
-23% -$44K ﹤0.01% 10369
2023
Q2 		$179K Sell
29,800
-5,200
-15% -$36.3K ﹤0.01% 10060
2023
Q1 		$217K Sell
35,000
-177,700
-84% -$1.45M ﹤0.01% 10038
2022
Q4 		$1.96M Sell
212,700
-1,400
-0.7% -$12.2K ﹤0.01% 5527
2022
Q3 		$2.02M Sell
214,100
-8,900
-4% -$96.2K ﹤0.01% 5555
2022
Q2 		$2.27M Buy
223,000
+130,800
+142% +$1.3M ﹤0.01% 5297
2022
Q1 		$1.31M Buy
92,200
+76,000
+469% +$1.2M ﹤0.01% 7070
2021
Q4 		$335K Sell
16,200
-13,100
-45% -$295K ﹤0.01% 10678
2021
Q3 		$669K Sell
29,300
-19,000
-39% -$532K ﹤0.01% 9175
2021
Q2 		$1.01M Buy
48,300
+27,900
+137% +$526K ﹤0.01% 8361
2021
Q1 		$411K Sell
20,400
-26,600
-57% -$477K ﹤0.01% 10109
2020
Q4 		$711K Buy
47,000
+20,800
+79% +$258K ﹤0.01% 7471
2020
Q3 		$276K Buy
+26,200
New +$424K ﹤0.01% 8265
2020
Q2 		– Sell
-11,100
Closed -$268K – 9706
2020
Q1 		$268K Buy
+11,100
New +$283K ﹤0.01% 7523

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 $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
FCMI
Foresite Capital Management IV Larkspur, California $237M AUM 107.53% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
MC
Merck & Co Kenilworth, New Jersey $526M AUM 175.27% 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

Ken Griffin's ALEC Position: Q1 2026 in Review

Ken Griffin 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.

Ken Griffin 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.

  • Ken Griffin held 77,545 shares of Alector worth $167K as of Q1 2026.
  • Ken Griffin sold 16,002 Alector shares in Q1 2026, an estimated $32.1K.
  • Alector made up ﹤0.01% of Ken Griffin's portfolio in Q1 2026, its #11593 holding.
  • Ken Griffin first reported a position in Alector in Q2 2019 and has held it in 23 quarters since.
  • Ken Griffin'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.