Alector, Inc. — Director's Dealing 2021

Jul 7, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alector, Inc. (ALEC)
CIK: 0001653087
Period of Report: 2021-07-02

Reporting Person: King Robert (Chief Development Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-07-02	Common Stock	M	30000	$8.16	Acquired	552317	Direct
2021-07-02	Common Stock	M	30000	$10.14	Acquired	582317	Direct
2021-07-02	Common Stock	S	60000	$31.14	Disposed	522317	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-07-02	Employee Stock Option (right to buy)	$8.16	M	30000	Disposed	2028-07-02	Common Stock (30000)	Direct
2021-07-02	Employee Stock Option (right to buy)	$10.14	M	30000	Disposed	2028-11-06	Common Stock (30000)	Direct

Footnotes

F1: The sales reported by the Reporting Person were effected pursuant to a Rule 10b5-1 trading plan adopted on May 19, 2020.

F2: Shares subject to the option vest in 48 equal monthly installments beginning on August 2, 2018.

F3: One fourth (1/4th) of the shares subject to the option vested on November 1, 2019, and one forty-eighth (1/48th) of the shares subject to the option vest each month thereafter.