Ken Griffin Alector, Inc. Transaction History

Citadel Advisors LLC

$550 Billion
Q2 2025

A detailed history of Ken Griffin (Citadel Advisors LLC) transactions in Alector, Inc. stock. As of the latest transaction made, Citadel Advisors LLC holds 551,820 shares of ALEC stock, worth $1.1 Million. This represents 0.0% of its overall portfolio holdings.

Number of Shares

551,820

Previous 56,400 878.4%

Holding current value

$1.1 Million

Previous $69,000 1018.84%

% of portfolio

0.0%

Previous 0.0%

20 transactions

Quarter	Operation	Price Per share	shares change	shares Held
Q2 2025 Aug 14, 2025	BUY	$0.9 - $1.63 $491,743 - $890,602	546,382 Added 10047.48%	551,820 $772,000
Q1 2025 May 15, 2025	SELL	$1.23 - $2.06 $516,025 - $864,237	-419,533 Reduced 98.72%	5,438 $6,000
Q4 2024 Feb 14, 2025	BUY	$1.72 - $6.06 $394,201 - $1.39 Million	229,187 Added 117.06%	424,971 $803,000
Q3 2024 Nov 14, 2024	BUY	$4.34 - $6.58 $849,702 - $1.29 Million	195,784 New	195,784 $914,000
Q1 2024 May 15, 2024	BUY	$5.69 - $8.08 $177,351 - $251,845	31,169 New	31,169 $187,000
Q3 2023 Nov 14, 2023	SELL	$5.2 - $8.77 $1.11 Million - $1.87 Million	-213,191 Reduced 96.4%	7,960 $51,000
Q2 2023 Aug 14, 2023	BUY	$5.86 - $7.93 $1.3 Million - $1.75 Million	221,151 New	221,151 $1.33 Million
Q4 2022 Feb 14, 2023	BUY	$6.88 - $9.55 $2.79 Million - $3.87 Million	405,014 Added 471.91%	490,838 $4.53 Million
Q3 2022 Nov 14, 2022	SELL	$8.19 - $13.2 $295,274 - $475,899	-36,053 Reduced 29.58%	85,824 $812,000
Q2 2022 Aug 15, 2022	BUY	$7.65 - $14.24 $129,545 - $241,140	16,934 Added 16.14%	121,877 $1.24 Million
Q1 2022 May 16, 2022	BUY	$13.02 - $20.78 $963,506 - $1.54 Million	74,002 Added 239.17%	104,943 $1.5 Million
Q4 2021 Feb 14, 2022	SELL	$19.35 - $25.54 $2.77 Million - $3.66 Million	-143,229 Reduced 82.24%	30,941 $638,000
Q3 2021 Nov 15, 2021	SELL	$21.65 - $39.49 $2.61 Million - $4.77 Million	-120,727 Reduced 40.94%	174,170 $3.98 Million
Q2 2021 Aug 16, 2021	BUY	$15.5 - $22.48 $3.93 Million - $5.7 Million	253,608 Added 614.23%	294,897 $6.14 Million
Q1 2021 May 17, 2021	SELL	$14.84 - $22.23 $2.42 Million - $3.63 Million	-163,372 Reduced 79.83%	41,289 $832,000
Q4 2020 Feb 16, 2021	SELL	$9.4 - $16.7 $836,628 - $1.49 Million	-89,003 Reduced 30.31%	204,661 $3.1 Million
Q3 2020 Nov 16, 2020	BUY	$10.54 - $24.96 $2.59 Million - $6.12 Million	245,376 Added 508.15%	293,664 $3.09 Million
Q2 2020 Aug 14, 2020	BUY	$21.87 - $33.11 $142,483 - $215,711	6,515 Added 15.6%	48,288 $1.18 Million
Q1 2020 May 15, 2020	SELL	$16.25 - $35.28 $3,363 - $7,302	-207 Reduced 0.49%	41,773 $1.01 Million
Q2 2019 Aug 14, 2019	BUY	$16.26 - $26.42 $682,594 - $1.11 Million	41,980 New	41,980 $798,000

Others Institutions Holding ALEC

# of Institutions

140

Shares Held

54.6M

Call Options Held

29.8K

Put Options Held

13.4K

View Full List

About Alector, Inc.

Ticker ALEC
Exchange NASDAQ
Sector Healthcare
Industry Biotechnology
Shares Outstandng 82,563,904
Market Cap $165M
Description
Alector, Inc., a clinical stage biopharmaceutical company, develops therapies for the treatment of neurodegeneration diseases. Its products include AL001, a humanized recombinant monoclonal antibody, which is in Phase III clinical trial for the treatment of frontotemporal dementia, Alzheimer's, Parkinson's, and amyotrophic lateral sclerosis dise...

More about ALEC

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