<SEC-DOCUMENT>0001193125-24-010640-index.html : 20240119
<SEC-HEADER>0001193125-24-010640.hdr.sgml : 20240119
<ACCEPTANCE-DATETIME>20240119060439
ACCESSION NUMBER:		0001193125-24-010640
CONFORMED SUBMISSION TYPE:	424B5
PUBLIC DOCUMENT COUNT:		3
FILED AS OF DATE:		20240119
DATE AS OF CHANGE:		20240119

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Alector, Inc.
		CENTRAL INDEX KEY:			0001653087
		STANDARD INDUSTRIAL CLASSIFICATION:	BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
		ORGANIZATION NAME:           	03 Life Sciences
		IRS NUMBER:				822933343
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		424B5
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-270126
		FILM NUMBER:		24543647

	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>424B5
<SEQUENCE>1
<FILENAME>d705015d424b5.htm
<DESCRIPTION>424B5
<TEXT>
Document 1 - file: d705015d424b5.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g705015g15z50.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: g705015g15z50.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g705015g70w01.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g705015g70w01.jpg

</DOCUMENT>
</SEC-DOCUMENT>