| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Berkley Neil Lindsay | Chief Bus Ofcr & Interim CFO | C/O ALECTOR, INC., 131 OYSTER POINT BLVD, SUITE 600, SOUTH SAN FRANCISCO | Grace Wong-Sarad, by power of attorney | 12 Nov 2025 | 0002075298 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | ALEC | Common Stock | Award | $0 | +65,000 | +19% | $0.000000 | 411,570 | 10 Nov 2025 | Direct | F1 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Underlying Class | Amount | Exercise Price | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | ALEC | Employee Stock Option (right to buy) | Award | $0 | +195,000 | $0.000000 | 195,000 | 10 Nov 2025 | Common Stock | 195,000 | $1.31 | Direct | F2 |
| Id | Content |
|---|---|
| F1 | The reported shares are represented by restricted stock units, or RSUs, which vest in 12 equal quarterly installments beginning on December 1, 2025. |
| F2 | Shares subject to the option vest in 48 equal monthly installments beginning on December 10, 2025. |