Alector, Inc. — Director's Dealing 2020

Jan 27, 2020

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alector, Inc. (ALEC)
CIK: 0001653087
Period of Report: 2020-01-23

Reporting Person: Oney Sabah (Chief Business Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2020-01-23	Common Stock	M	2200	$8.16	Acquired	596118	Direct
2020-01-23	Common Stock	S	2200	$25.21	Disposed	593918	Direct
2020-01-27	Common Stock	M	14467	$8.16	Acquired	608385	Direct
2020-01-27	Common Stock	S	14467	$25.05	Disposed	593918	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2020-01-23	Stock Option (right to buy)	$8.16	M	2200	Disposed	2028-07-01	Common Stock (2200)	Direct
2020-01-27	Stock Option (right to buy)	$8.16	M	14467	Disposed	2028-07-01	Common Stock (14467)	Direct

Footnotes

F1: The sales reported by the Reporting Person were effected pursuant to a Rule 10b5-1 trading plan.

F2: The sale price reported in column 4 of Table I represents the weighted average sale price of the shares purchased ranging from $25.00 to $25.15 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: One forty-eighth (1/48th) of the shares subject to the option vested on August 2, 2018, and an additional one forty-eighth (1/48th) of the shares subject to the option shall vest each month thereafter.