Arnon Rosenthal insider trades: Alector (ALEC) stock sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Arnon reports to the SEC
Open-market buys and sales
21 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Sep 3, 2026 | ALEC | ↓ Sell | 72,606 | $2.66 | $193K | Direct | Sep 4, 2026 (1d) |
| Jun 2, 2026 | ALEC | ↓ Sell | 87,216 | $1.97 | $172K | Direct | Jun 3, 2026 (1d) |
| Mar 2, 2026 | ALEC | ↓ Sell | 81,864 | $2.12 | $174K | Direct | Mar 3, 2026 (1d) |
| Dec 3, 2025 | ALEC | ↓ Sell | 104,347 | $1.12 | $117K | Direct | Dec 3, 2025 (0d) |
| Sep 2, 2025 | ALEC | ↓ Sell | 51,562 | $2.50 | $129K | Direct | Sep 4, 2025 (2d) |
| Jun 2, 2025 | ALEC | ↓ Sell | 52,087 | $1.34 | $70K | Direct | Jun 4, 2025 (2d) |
| Mar 3, 2025 | ALEC | ↓ Sell | 40,330 | $1.47 | $59K | Direct | Mar 5, 2025 (2d) |
| Dec 2, 2024 | ALEC | ↓ Sell | 52,172 | $2.52 | $131K | Direct | Dec 3, 2024 (1d) |
| Sep 3, 2024 | ALEC | ↓ Sell | 26,499 | $4.88 | $129K | Direct | Sep 4, 2024 (1d) |
| Jun 3, 2024 | ALEC | ↓ Sell | 25,135 | $4.80 | $121K | Direct | Jun 4, 2024 (1d) |
| Mar 4, 2024 | ALEC | ↓ Sell | 18,837 | $6.92 | $130K | Direct | Mar 5, 2024 (1d) |
| Dec 4, 2023 | ALEC | ↓ Sell | 23,831 | $5.56 | $133K | Direct | Dec 6, 2023 (2d) |
| Sep 5, 2023 | ALEC | ↓ Sell | 5,647 | $5.19 | $29K | Direct | Sep 6, 2023 (1d) |
| Jun 2, 2023 | ALEC | ↓ Sell | 5,255 | $6.90 | $36K | Direct | Jun 5, 2023 (3d) |
| Mar 17, 2023 | ALEC | ↓ Sell | 15,186 | $6.22 | $94K | Direct | Mar 21, 2023 (4d) |
| Mar 2, 2023 | ALEC | ↓ Sell | 5,849 | $8.32 | $49K | Direct | Mar 3, 2023 (1d) |
| Nov 11, 2021 | ALEC | ↓ Sell | 110,000 | $25.00 | $2.8M | Indirect | Nov 12, 2021 (1d) |
| Nov 9, 2021 | ALEC | ↓ Sell | 140,000 | $25.00 | $3.5M | Indirect | Nov 10, 2021 (1d) |
| Nov 5, 2021 | ALEC | ↓ Sell | 140,000 | $25.00 | $3.5M | Indirect | Nov 8, 2021 (3d) |
| Sep 23, 2021 | ALEC | ↓ Sell | 109,625 | $25.31 | $2.8M | Indirect | Sep 23, 2021 (0d) |
| Sep 21, 2021 | ALEC | ↓ Sell | 200,000 | $25.96 | $5.2M | Indirect | Sep 22, 2021 (1d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other ALEC insiders
Open-market trades in the last 12 months
About Arnon Rosenthal's insider trades
Arnon Rosenthal is Chief Executive Officer at Alector (ALEC). Since Sep 21, 2021, Arnon has reported no open-market purchases and 21 sales worth $19.5M on SEC Form 4. In the last 12 months: 4 sales ($656K).
Their filings also include grants and awards (11 filings), shares returned to the company (1 filing), gifts (1 filing). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every ALEC insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.