ALEC (Alector, Inc. Common Stock)
Insider Trading Activity
Every open-market purchase and sale reported by ALEC officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-04 | Grace Wong-Sarad | Principal Accounting Officer | Sell | — | — |
| 2026-09-04 | Neil Lindsay Berkley | CFO & Chief Business Officer | Sell | — | — |
| 2026-09-04 | Arnon Rosenthal | Chief Executive Officer | Sell | — | — |
| 2026-08-21 | Arnon Rosenthal | Chief Executive Officer | G | — | — |
| 2026-07-09 | Grace Wong-Sarad | Principal Accounting Officer | A | — | — |
| 2026-06-17 | ERROL B DESOUZA | Director | A | — | — |
| 2026-06-17 | Paula Hammond | Director | A | — | — |
| 2026-06-17 | Mark Altmeyer | Director | A | — | — |
| 2026-06-17 | ELIZABETH A. GAROFALO | Director | A | — | — |
| 2026-06-17 | Kristine Yaffe | Director | A | — | — |
| 2026-06-17 | RICHARD H SCHELLER | Director | A | — | — |
| 2026-06-17 | LOUIS J LAVIGNE JR | Director | A | — | — |
| 2026-06-03 | Grace Wong-Sarad | Principal Accounting Officer | Sell | — | — |
| 2026-06-03 | Neil Lindsay Berkley | CFO & Chief Business Officer | Sell | — | — |
| 2026-06-03 | RICHARD H SCHELLER | Director | A | — | — |
| 2026-06-03 | Arnon Rosenthal | Chief Executive Officer | Sell | — | — |
| 2026-04-17 | Grace Wong-Sarad | Principal Accounting Officer | Sell | — | — |
| 2026-03-13 | Neil Lindsay Berkley | CFO & Chief Business Officer | A | — | — |
| 2026-03-13 | Arnon Rosenthal | Chief Executive Officer | A | — | — |
| 2026-03-12 | Grace Wong-Sarad | Principal Accounting Officer | Sell | — | — |
| 2026-03-03 | Grace Wong-Sarad | Principal Accounting Officer | Sell | — | — |
| 2026-03-03 | Grace Wong-Sarad | Principal Accounting Officer | Sell | — | — |
| 2026-03-03 | Arnon Rosenthal | Chief Executive Officer | Sell | — | — |
| 2026-03-03 | Neil Lindsay Berkley | CFO & Chief Business Officer | Sell | — | — |
| 2026-02-26 | Grace Wong-Sarad | Principal Accounting Officer | Sell | — | — |
| 2025-12-08 | Grace Wong-Sarad | Principal Accounting Officer | Sell | — | — |
| 2025-12-03 | Neil Lindsay Berkley | Chief Bus Ofcr & Interim CFO | Sell | — | — |
| 2025-12-03 | Grace Wong-Sarad | Principal Accounting Officer | Sell | — | — |
| 2025-12-03 | Sara Kenkare-Mitra | President and Head of R&D | Sell | — | — |
| 2025-12-03 | Arnon Rosenthal | Chief Executive Officer | Sell | — | — |
| 2025-11-12 | Neil Lindsay Berkley | Chief Bus Ofcr & Interim CFO | A | — | — |
| 2025-11-12 | Grace Wong-Sarad | Principal Accounting Officer | A | — | — |
| 2025-11-12 | Arnon Rosenthal | Chief Executive Officer | A | — | — |
| 2025-09-04 | Grace Wong-Sarad | Principal Accounting Officer | Sell | — | — |
| 2025-09-04 | Arnon Rosenthal | Chief Executive Officer | Sell | — | — |
| 2025-09-04 | Sara Kenkare-Mitra | President and Head of R&D | Sell | — | — |
| 2025-09-04 | Neil Lindsay Berkley | Principal Financial Officer | Sell | — | — |
| 2025-08-27 | Paula Hammond | Director | Sell | — | — |
| 2025-07-01 | Sara Kenkare-Mitra | President and Head of R&D | A | — | — |
| 2025-07-01 | Neil Lindsay Berkley | Principal Financial Officer | A | — | — |
| 2025-07-01 | Arnon Rosenthal | Chief Executive Officer | A | — | — |
| 2025-06-23 | Kristine Yaffe | Director | Sell | — | — |
| 2025-06-12 | Paula Hammond | Director | A | — | — |
| 2025-06-12 | RICHARD H SCHELLER | Director | A | — | — |
| 2025-06-12 | ERROL B DESOUZA | Director | A | — | — |
| 2025-06-12 | Kristine Yaffe | Director | A | — | — |
| 2025-06-12 | Mark Altmeyer | Director | A | — | — |
| 2025-06-12 | LOUIS J LAVIGNE JR | Director | A | — | — |
| 2025-06-12 | ELIZABETH A. GAROFALO | Director | A | — | — |
| 2025-06-04 | Sara Kenkare-Mitra | President and Head of R&D | Sell | — | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| — | 10%+ Owner | 12,853,817 | — |
| — | 10%+ Owner | 10,952,350 | — |
| — | Director | 10,908,813 | — |
| — | 10%+ Owner | 10,452,350 | — |
| — | 10%+ Owner | 9,952,350 | — |
| — | Chief Executive Officer | 3,297,100 | — |
| — | Director | 2,650,781 | — |
| — | Director | 2,644,319 | — |
| — | 10%+ Owner | 1,921,804 | — |
| — | Chief Business Officer | 573,918 | — |
| — | Chief Development Officer | 550,871 | — |
| — | President and Head of R&D | 501,652 | — |
| — | CFO & Chief Business Officer | 350,649 | — |
| — | Chief Medical Officer | 332,977 | — |
| — | Chief Financial Officer | 296,072 | — |
| — | Chief Medical Officer | 252,744 | — |
| — | Vice President, Finance | 187,526 | — |
| — | Director | 138,661 | — |
| — | Director | 134,899 | — |
| — | Director | 124,109 | — |
| — | Director | 118,650 | — |
| — | Director | 115,330 | — |
| — | Principal Accounting Officer | 106,015 | — |
| — | Director | 103,609 | — |
| — | President and COO | 102,598 | — |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the ALEC quote page; the site-wide leaderboard is on the insider transactions hub.