Arnon Rosenthal serves as Executive at Alector, Inc., where they oversee executive responsibilities. Since joining the company, Arnon Rosenthal has executed 41 insider transactions totaling $21.7M, demonstrating a bearish approach to their equity position. Their most recent transaction on Dec 3, 2025 involved selling 104,347 shares valued at $116.9K.
Arnon Rosenthal currently holds 2,420,040 shares of Alector, Inc. (ALEC), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Arnon Rosenthal has been a net seller of ALEC stock. They have purchased $0 and sold $21.7M worth of shares.
Arnon Rosenthal's most recent insider trade was on Dec 3, 2025, when they sold 104,347 shares at $1.12 per share.
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| $N/A |
| Discretionary |
| Sep 2, 2025 | ALEC | $128.9K | Sale | 51,562 | $2.50 | Discretionary |
| Jul 1, 2025 | ALEC | $0 | Award | 137,125 | $N/A | Discretionary |
| Sep 3, 2024 | ALEC | $129.3K | Sale | 26,499 | $4.88 | Discretionary |
| Jun 3, 2024 | ALEC | $120.6K | Sale | 25,135 | $4.80 | Discretionary |
| Mar 4, 2024 | ALEC | $130.4K | Sale | 18,837 | $6.92 | Discretionary |
| Dec 4, 2023 | ALEC | $132.5K | Sale | 23,831 | $5.56 | Discretionary |
| Oct 1, 2023 | ALEC | $0 | Award | 397,600 | $N/A | Discretionary |
| Sep 5, 2023 | ALEC | $29.3K | Sale | 5,647 | $5.19 | Discretionary |
| Jun 2, 2023 | ALEC | $36.3K | Sale | 5,255 | $6.90 | Discretionary |
| Mar 17, 2023 | ALEC | $94.5K | Sale | 15,186 | $6.22 | Discretionary |
| Mar 3, 2023 | ALEC | $0 | Award | 42,990 | $N/A | Discretionary |
| Mar 2, 2023 | ALEC | $48.7K | Sale | 5,849 | $8.32 | Discretionary |
| Oct 1, 2022 | ALEC | $0 | Award | 179,169 | $N/A | Discretionary |
| Nov 11, 2021 | ALEC | $1.4M | Sale | 55,000 | $25.00 | Discretionary |
| Nov 10, 2021 | ALEC | $1.4M | Sale | 55,000 | $25.00 | Discretionary |
| Nov 9, 2021 | ALEC | $375.0K | Sale | 15,000 | $25.00 | Discretionary |
| Nov 9, 2021 | ALEC | $375.0K | Sale | 15,000 | $25.00 | Discretionary |
| Nov 9, 2021 | ALEC | $375.0K | Sale | 15,000 | $25.00 | Discretionary |
| Nov 9, 2021 | ALEC | $1.4M | Sale | 55,000 | $25.00 | Discretionary |
| Nov 8, 2021 | ALEC | $375.0K | Sale | 15,000 | $25.00 | Discretionary |
| Nov 8, 2021 | ALEC | $375.0K | Sale | 15,000 | $25.00 | Discretionary |
| Nov 8, 2021 | ALEC | $1.4M | Sale | 55,000 | $25.00 | Discretionary |
| Nov 8, 2021 | ALEC | $375.0K | Sale | 15,000 | $25.00 | Discretionary |
| Nov 5, 2021 | ALEC | $375.0K | Sale | 15,000 | $25.00 | Discretionary |
| Nov 5, 2021 | ALEC | $375.0K | Sale | 15,000 | $25.00 | Discretionary |
| Nov 5, 2021 | ALEC | $375.0K | Sale | 15,000 | $25.00 | Discretionary |
| Nov 5, 2021 | ALEC | $1.4M | Sale | 55,000 | $25.00 | Discretionary |
| Nov 4, 2021 | ALEC | $375.0K | Sale | 15,000 | $25.00 | Discretionary |