13 insiders reported 52 Form 4 transactions for Alector, Inc. (ALEC) over the past 18 months (most recent 2026-06-17). Recent activity: DESOUZA ERROL B (Director) Buy 28,700 shares, LAVIGNE LOUIS J JR (Director) Buy 28,700 shares, SCHELLER RICHARD H (Director) Buy 28,700 shares, Altmeyer Mark (Director) Buy 28,700 shares, Yaffe Kristine (Director) Buy 28,700 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-06-17 | DESOUZA ERROL B | Director | Buy | 28,700 | $0 |
| 2026-06-17 | LAVIGNE LOUIS J JR | Director | Buy | 28,700 | $0 |
| 2026-06-17 | SCHELLER RICHARD H | Director | Buy | 28,700 | $0 |
| 2026-06-17 | Altmeyer Mark | Director | Buy | 28,700 | $0 |
| 2026-06-17 | Yaffe Kristine | Director | Buy | 28,700 | $0 |
| 2026-06-17 | Hammond Paula | Director | Buy | 28,700 | $0 |
| 2026-06-17 | GAROFALO ELIZABETH A. | Director | Buy | 28,700 | $0 |
| 2026-06-03 | SCHELLER RICHARD H | Director | Buy | 10,833 | $0 |
| 2026-06-03 | Rosenthal Arnon | Chief Executive Officer | Sell | 87,216 | $172,191 |
| 2026-06-03 | Wong-Sarad Grace | Principal Accounting Officer | Sell | 5,709 | $11,271 |
| 2026-06-03 | Berkley Neil Lindsay | CFO & Chief Business Officer | Sell | 19,360 | $38,221 |
| 2026-06-03 | Wong-Sarad Grace | Principal Accounting Officer | Sell | 3,475 | $6,543 |
| 2026-04-17 | Wong-Sarad Grace | Principal Accounting Officer | Sell | 1,820 | $4,823 |
| 2026-03-13 | Rosenthal Arnon | Chief Executive Officer | Buy | 116,246 | $0 |
| 2026-03-13 | Berkley Neil Lindsay | CFO & Chief Business Officer | Buy | 54,600 | $0 |
| 2026-03-12 | Wong-Sarad Grace | Principal Accounting Officer | Sell | 1,000 | $2,650 |
| 2026-03-03 | Wong-Sarad Grace | Principal Accounting Officer | Sell | 8,071 | $17,111 |
| 2026-03-03 | Berkley Neil Lindsay | CFO & Chief Business Officer | Sell | 29,649 | $62,856 |
| 2026-03-03 | Rosenthal Arnon | Chief Executive Officer | Sell | 81,864 | $173,552 |
| 2026-03-03 | Wong-Sarad Grace | Principal Accounting Officer | Sell | 3,367 | $7,003 |
| 2026-02-26 | Wong-Sarad Grace | Principal Accounting Officer | Sell | 4,079 | $10,198 |
| 2025-12-08 | Wong-Sarad Grace | Principal Accounting Officer | Sell | 4,753 | $5,751 |
| 2025-12-03 | Kenkare-Mitra Sara | President and Head of R&D | Sell | 41,687 | $46,689 |
| 2025-12-03 | Berkley Neil Lindsay | Chief Bus Ofcr & Interim CFO | Sell | 37,261 | $41,732 |
| 2025-12-03 | Rosenthal Arnon | Chief Executive Officer | Sell | 104,347 | $116,869 |
Source: SEC Form 4 filings · as of 2026-06-17