| Date | Issuer | Type | Security | Price | Units | Value | |
|---|---|---|---|---|---|---|---|
| Alector Inc. Principal Accounting Officer | A | Common Stock | |||||
| Alector Inc. Principal Accounting Officer | S | Common Stock | |||||
| Alector Inc. Principal Accounting Officer | S | Common Stock | |||||
| Alector Inc. Principal Accounting Officer | S | Common Stock | |||||
| Alector Inc. Principal Accounting Officer | S | Common Stock |