🕵️ Alector, Inc. ($ALEC)
SEC insider & ownership activity, last 12 months · CIK 1653087 · every row links its SEC filing
Over the last 12 months insiders sold $1.0M with no open-market buying against it. Rosenthal Arnon sold $592K (Sep–Jun). 1 planned sale is pending, the largest $11K (Grace Wong-Sarad). No red-flag 8-Ks in the window.
🚨 3 signals active —
planned-vs-executed verdicts, pre-event flags, and cluster context live in the
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Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
0 buyers, $0 (0 lots) · 5 sellers, $1.0M (21 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Rosenthal Arnon | 0 | – | 4 | $592K | Jun 2, 2026 |
| Berkley Neil Lindsay | 0 | – | 4 | $182K | Jun 2, 2026 |
| Kenkare-Mitra Sara | 0 | – | 2 | $106K | Dec 3, 2025 |
| Wong-Sarad Grace | 0 | – | 10 | $89K | Jun 3, 2026 |
| Hammond Paula | 0 | – | 1 | $33K | Aug 26, 2025 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Chen Yu | 9.2% | 13G | Nov 14, 2025 | filing ↗ | |
| Arnon Rosenthal | 7.4% | 13G | Feb 6, 2026 | filing ↗ | |
| Blackrock, Inc. | 5.2% | 13G | Apr 27, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Grace Wong-Sarad | $7K | Jun 3, 2026 | filing ↗ |
| Neil L. Berkley | $38K | Jun 2, 2026 | filing ↗ |
| Grace Wong-Sarad | $11K | Jun 2, 2026 | filing ↗ |
| Arnon Rosenthal | $140K | Jun 2, 2026 | filing ↗ |
| Grace Wong-Sarad | $5K | Apr 16, 2026 | filing ↗ |
| Grace Wong-Sarad | $3K | Mar 10, 2026 | filing ↗ |
| Grace Wong-Sarad | $7K | Mar 3, 2026 | filing ↗ |
| Neil L. Berkley | $56K | Mar 2, 2026 | filing ↗ |
| Arnon Rosenthal | $164K | Mar 2, 2026 | filing ↗ |
| Grace Wong-Sarad | $15K | Mar 2, 2026 | filing ↗ |
| Grace Wong-Sarad | $10K | Feb 26, 2026 | filing ↗ |
| Grace Wong-Sarad | $6K | Dec 5, 2025 | filing ↗ |
| Arnon Rosenthal | $114K | Dec 1, 2025 | filing ↗ |
| Neil L. Berkley | $41K | Dec 1, 2025 | filing ↗ |
| Grace Wong-Sarad | $9K | Dec 1, 2025 | filing ↗ |
| Sara Kenkare-Mitra | $45K | Dec 1, 2025 | filing ↗ |
| Neil L. Berkley | $36K | Sep 2, 2025 | filing ↗ |
| Grace Wong-Sarad | $13K | Sep 2, 2025 | filing ↗ |
| Sara Kenkare-Mitra | $54K | Sep 2, 2025 | filing ↗ |
| Arnon Rosenthal | $118K | Sep 2, 2025 | filing ↗ |
| Paula Hammond | $33K | Aug 26, 2025 | filing ↗ |
| Marc Grasso | $153K | Aug 8, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Agreement terminated (1.02) | Jul 6, 2026 | filing ↗ |
| Shareholder vote (5.07) | Jun 17, 2026 | filing ↗ |
| Material agreement (1.01) | May 7, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 7, 2026 | filing ↗ |
| Earnings (2.02) | May 7, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 7, 2026 | filing ↗ |
| Earnings (2.02) | Feb 25, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 25, 2026 | filing ↗ |
| Officer/director changes (5.02) | Dec 10, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Dec 10, 2025 | filing ↗ |
| Earnings (2.02) | Nov 6, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 6, 2025 | filing ↗ |
| Earnings (2.02) | Oct 20, 2025 | filing ↗ |
| Exit or disposal costs (2.05) | Oct 20, 2025 | filing ↗ |
| Officer/director changes (5.02) | Oct 20, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Oct 20, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 20, 2025 | filing ↗ |
| Earnings (2.02) | Aug 7, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 7, 2025 | filing ↗ |