<SEC-DOCUMENT>0001193125-23-122173-index.html : 20230427
<SEC-HEADER>0001193125-23-122173.hdr.sgml : 20230427
<ACCEPTANCE-DATETIME>20230427161253
ACCESSION NUMBER:		0001193125-23-122173
CONFORMED SUBMISSION TYPE:	DEFA14A
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20230427
DATE AS OF CHANGE:		20230427

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Alector, Inc.
		CENTRAL INDEX KEY:			0001653087
		STANDARD INDUSTRIAL CLASSIFICATION:	BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
		IRS NUMBER:				822933343
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		DEFA14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38792
		FILM NUMBER:		23857006

	BUSINESS ADDRESS:	
		STREET 1:		131 OYSTER POINT BLVD., SUITE 600
		CITY:			SOUTH SAN FRANCISCO
		STATE:			CA
		ZIP:			94080
		BUSINESS PHONE:		415-231-5660

	MAIL ADDRESS:	
		STREET 1:		131 OYSTER POINT BLVD., SUITE 600
		CITY:			SOUTH SAN FRANCISCO
		STATE:			CA
		ZIP:			94080

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Alector LLC
		DATE OF NAME CHANGE:	20150915
</SEC-HEADER>
<DOCUMENT>
<TYPE>DEFA14A
<SEQUENCE>1
<FILENAME>d430876ddefa14a.htm
<DESCRIPTION>DEFA14A
<TEXT>
Document 1 - file: d430876ddefa14a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g430876g67y69.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: g430876g67y69.jpg

</DOCUMENT>
</SEC-DOCUMENT>