NASDAQ:ALEC

Alector Stock Insider Trading

Healthcare > Biotechnology

Buy ALEC

*Your capital is at risk

$1.83

+0.0500 (+2.81%)

At Close: Jun 23, 2026

Alector Stock Insider Power

Based on the 100 latest insides trades, we have calculated the insider power to be negative at -12.93. In total, the insiders bought 2.67M and sold 549.86K ALEC shares in the last 100 trades. The insider score can be negative despite buy/sell ratio being positive. The score focuses on the quality of the trades.

Insider Power (Last 100 transactions)	-12.93
● Buy	2.67M shares
● Sell	549.86K shares
76% Buy Activity Negligible or No Correlation
Sell Signal Low Confidence Mar 02, 2026 Analysis Breakdown: Confidence increased due to high data reliability score of 100.

Historical Insider Trades

Date	Type	Person	Role	Amount
Jul 01, 2025 Buy	Employee Stock Option (right to buy) A-Award	Rosenthal Arnon Chief Executive Officer	CEO / President	45 700 Value: $64.9K
Jul 01, 2025 Buy	Common Stock A-Award	Rosenthal Arnon Chief Executive Officer	CEO / President	137 125 Value: $194.7K
Jul 01, 2025 Buy	Employee Stock Option (right to buy) A-Award	Kenkare-mitra Sara President And Head Of R&d	CEO / President	18 250 Value: $25.9K
Jul 01, 2025 Buy	Common Stock A-Award	Kenkare-mitra Sara President And Head Of R&d	CEO / President	54 725 Value: $77.7K
Jul 01, 2025 Buy	Employee Stock Option (right to buy) A-Award	Berkley Neil Lindsay Principal Financial Officer	Officer	18 000 Value: $25.6K
Jun 20, 2025 Buy	Common Stock	Berkley Neil Lindsay Principal Financial Officer	Officer	0 Value: $0
Jun 20, 2025 Buy	Employee Stock Option (right to buy)	Berkley Neil Lindsay Principal Financial Officer	Officer	12 975 Value: $14.3K
Jun 20, 2025 Buy	Common Stock	Wong-sarad Grace Principal Accounting Officer	Officer	0 Value: $0
Jun 20, 2025 Buy	Employee Stock Option (right to buy)	Wong-sarad Grace Principal Accounting Officer	Officer	20 000 Value: $329.2K
Jun 20, 2025 Buy	Employee Stock Option (right to buy)	Wong-sarad Grace Principal Accounting Officer	Officer	13 842 Value: $237.4K
Jun 20, 2025 Buy	Employee Stock Option (right to buy)	Wong-sarad Grace Principal Accounting Officer	Officer	20 454 Value: $209.4K
Jun 20, 2025 Buy	Employee Stock Option (right to buy)	Wong-sarad Grace Principal Accounting Officer	Officer	10 228 Value: $138.7K
Jun 20, 2025 Buy	Employee Stock Option (right to buy)	Wong-sarad Grace Principal Accounting Officer	Officer	11 552 Value: $273.8K
Jun 20, 2025 Buy	Employee Stock Option (right to buy)	Wong-sarad Grace Principal Accounting Officer	Officer	11 309 Value: $107.0K
Jun 20, 2025 Buy	Employee Stock Option (right to buy)	Wong-sarad Grace Principal Accounting Officer	Officer	2 845 Value: $3K
Jun 20, 2025 Buy	Employee Stock Option (right to buy)	Wong-sarad Grace Principal Accounting Officer	Officer	2 845 Value: $3K
Jun 20, 2025 Buy	Employee Stock Option (right to buy)	Wong-sarad Grace Principal Accounting Officer	Officer	11 309 Value: $107.0K
Jun 20, 2025 Buy	Employee Stock Option (right to buy)	Wong-sarad Grace Principal Accounting Officer	Officer	11 552 Value: $273.8K
Jun 20, 2025 Buy	Employee Stock Option (right to buy)	Wong-sarad Grace Principal Accounting Officer	Officer	10 228 Value: $138.7K
Jun 20, 2025 Buy	Employee Stock Option (right to buy)	Wong-sarad Grace Principal Accounting Officer	Officer	20 454 Value: $209.4K
Jun 20, 2025 Buy	Employee Stock Option (right to buy)	Wong-sarad Grace Principal Accounting Officer	Officer	13 842 Value: $237.4K
Jun 20, 2025 Buy	Employee Stock Option (right to buy)	Wong-sarad Grace Principal Accounting Officer	Officer	20 000 Value: $329.2K
Jun 20, 2025 Buy	Common Stock	Wong-sarad Grace Principal Accounting Officer	Officer	0 Value: $0
Jun 20, 2025 Buy	Employee Stock Option (right to buy)	Berkley Neil Lindsay Principal Financial Officer	Officer	12 975 Value: $14.3K
Jun 20, 2025 Buy	Common Stock	Berkley Neil Lindsay Principal Financial Officer	Officer	0 Value: $0

About Insider Power

Insider Power is a proprietary algorithm developed by StockInvest.us to evaluate the significance of insider transactions. The calculation considers the size, type, and timing of transactions, as well as the insider’s role within the company.

It is important to note that, in general, there is little to no correlation between insider transactions and short-term stock price movements. In one of our studies, only 0.22%^* of stocks with insider activity showed a measurable correlation — and even then, it was unclear whether the effect was caused by insider actions or simply by the stock’s broader trend.

While our algorithms are designed to highlight potentially meaningful signals, these cannot be regarded as statistically significant on their own. Insider trading activity should therefore be seen as informative rather than as direct trading guidance. The Insider Power metric was created to present this information in a clearer and more accessible way, helping investors better understand the possible context of insider activity.

* October 6th, 2025 - Tested on 5562 stocks

ABOUT ALECTOR INC.

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 diseases; and AL101 that is in Phase I clinical trial for the treatment of neurodegenerative diseases, incl...

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