Arnon Rosenthal - ALEC / Alector, Inc. - Insider Trade Report

Insider Purchases - Short Term Profit Analysis

In this section, we analyze the profitability of every unplanned, open-market insider purchase made by Arnon Rosenthal in ALEC / Alector, Inc.. This analysis helps to understand if the insider consistently generates abnormal returns, and is worth following. This analysis is for one-year following each trade, and the results are theoretical.

The following table shows the most recent open market purchases that were not part of an automatic trading plan.

Trade Date	Reported Shares	Reported Price	Adjusted Shares	Adjusted Price	Cost Basis	Days to Max	Price at Max	Max Profit ($)	Max Return (%)
There are no known unplanned open-market trades for this insider

Adjusted Price is the split-adjusted price. Adjusted Shares is the split-adjusted shares.

Insider Sales - Short Term Loss Analysis

In this section, we analyze the short-term loss avoidance of every unplanned, open-market insider sale made by Arnon Rosenthal in ALEC / Alector, Inc.. A consistent pattern of loss avoidance may suggest that future sale transactions may predict declines in price. This analysis is for one-year following each trade, and the results are theoretical.

The following table shows the most recent open market purchases that were not part of an automatic trading plan.

Trade Date	Reported Shares	Reported Price	Adjusted Shares	Adjusted Price	Cost Basis	Days to Min	Price at Min	Max Loss Avoided ($)	Max Loss Avoided (%)
2025-09-02	51,562	2.4968	51,562	2.4968	128,740	0	2.5900	4,806	3.73
2025-06-02	52,087	1.3384	52,087	1.3384	69,713
2025-03-03	40,330	1.4673	40,330	1.4673	59,176
2024-12-02	52,172	2.5194	52,172	2.5194	131,442
2024-09-03	26,499	4.8827	26,499	4.8827	129,387
2024-06-03	25,135	4.7988	25,135	4.7988	120,618
2024-03-04	18,837	6.9218	18,837	6.9218	130,386
2023-12-04	23,831	5.5600	23,831	5.5600	132,500
2023-09-05	5,647	5.1945	5,647	5.1945	29,333
2023-06-02	5,255	6.9037	5,255	6.9037	36,279
2023-03-17	15,186	6.2181	15,186	6.2181	94,428
2023-03-02	5,849	8.3178	5,849	8.3178	48,651

Adjusted Price is the split-adjusted price. Adjusted Shares is the split-adjusted shares.

Insider Transaction History