Alector, Inc. — Director's Dealing 2019

Dec 9, 2019

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alector, Inc. (ALEC)
CIK: 0001653087
Period of Report: 2019-12-05

Reporting Person: Oney Sabah (Chief Business Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2019-12-05	Common Stock	M	1500	$8.16	Acquired	595418	Direct
2019-12-05	Common Stock	S	1500	$20.00	Disposed	593918	Direct
2019-12-06	Common Stock	M	5156	$8.16	Acquired	599074	Direct
2019-12-06	Common Stock	S	5156	$20.02	Disposed	593918	Direct
2019-12-09	Common Stock	M	2300	$8.16	Acquired	596218	Direct
2019-12-09	Common Stock	S	2300	$20.07	Disposed	593918	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2019-12-05	Stock Option (right to buy)	$8.16	M	1500	Disposed	2028-07-01	Common Stock (1500)	Direct
2019-12-06	Stock Option (right to buy)	$8.16	M	5156	Disposed	2028-07-01	Common Stock (5156)	Direct
2019-12-09	Stock Option (right to buy)	$8.16	M	2300	Disposed	2028-07-01	Common Stock (2300)	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 $20.00 to $20.005 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 $20.00 to $20.09 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.

F4: The sale price reported in column 4 of Table I represents the weighted average sale price of the shares purchased ranging from $20.00 to $20.24 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.

F5: 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.