Alector, Inc. — Director's Dealing 2025

Nov 12, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alector, Inc. (ALEC)
CIK: 0001653087
Period of Report: 2025-11-10

Reporting Person: Berkley Neil Lindsay (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-11-10	Common Stock	A	65000	—	Acquired	411570	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-11-10	Employee Stock Option (right to buy)	$1.31	A	195000	Acquired	2035-11-09	Common Stock (195000)	Direct

Footnotes

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.