Arnon Rosenthal, Chief Executive Officer at Alector, Inc. (ALEC), sold 72,606 shares at $2.66 ($193K) on 2026-09-03, disclosed to the SEC on 2026-09-04.
Seasonal sale ($193k) by Chief Executive Officer — this insider has traded ALEC in September in at least three consecutive prior years. Pattern-driven, low signal.
Negative factors outweigh the positive ones.
| Filing → |
| ALEC | SELL | 2025-12-03 | $234K | — | Filing → |
| ALEC | SELL | 2025-09-04 | $129K | — | Filing → |
| ALEC | SELL | 2025-06-04 | $140K | — | Filing → |