Alector, Inc. — Director's Dealing 2020

Jun 5, 2020

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alector, Inc. (ALEC)
CIK: 0001653087
Period of Report: 2020-06-03

Reporting Person: Yu Calvin (Vice President, Finance)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2020-06-03	Common Stock	S	1043	$31.04	Disposed	110986	Direct
2020-06-03	Common Stock	S	300	$32.02	Disposed	110686	Direct

Footnotes

F1: The sales reported by the Reporting Person were effected pursuant to a Rule 10b5-1 trading plan. Consists of 1,343 shares acquired on May 29, 2020 at a price of $15.8270 per share under the Issuer's 2019 Employee Stock Purchase Plan.

F2: The sale price reported in column 4 of Table I represents the weighted average sale price of the shares purchased ranging from $30.59 to $31.42 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.

F3: The sale price reported in column 4 of Table I represents the weighted average sale price of the shares purchased ranging from $31.95 to $32.06 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.