Alector, Inc. — Director's Dealing 2021

May 11, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alector, Inc. (ALEC)
CIK: 0001653087
Period of Report: 2021-05-07

Reporting Person: Paul Robert (Chief Medical Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-05-07	Common Stock	A	60000	$0.00	Acquired	273719	Direct

Footnotes

F1: The reported shares are represented by performance share units, or PSUs. Fifty percent of the award will be earned if the Issuer's average closing stock price is $30 per share for 40 consecutive trading days and an additional fifty percent will be earned if the average closing stock price is $40 per share for 40 consecutive trading days. Upon attainment of the performance metrics, the shares vest in four equal quarterly installments beginning on the first vesting date as set forth in the PSU award agreement.