    <SEC-DOCUMENT>0001193125-26-193935-index.html : 20260430
    <SEC-HEADER>0001193125-26-193935.hdr.sgml : 20260430
    <ACCEPTANCE-DATETIME>20260430070239
    ACCESSION NUMBER:		0001193125-26-193935
    CONFORMED SUBMISSION TYPE:	DEFA14A
    PUBLIC DOCUMENT COUNT:		3
    FILED AS OF DATE:		20260430
    DATE AS OF CHANGE:		20260430

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			Lexeo Therapeutics, Inc.
    		CENTRAL INDEX KEY:			0001907108
    		STANDARD INDUSTRIAL CLASSIFICATION:	BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
    		ORGANIZATION NAME:           	03 Life Sciences
    		EIN:				854012572
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		DEFA14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-41855
    		FILM NUMBER:		26920002

    	BUSINESS ADDRESS:
    		STREET 1:		345 PARK AVENUE SOUTH
    		STREET 2:		FLOOR 6
    		CITY:			NEW YORK
    		STATE:			NY
    		ZIP:			10010
    		BUSINESS PHONE:		(212) 547-9879

    	MAIL ADDRESS:
    		STREET 1:		345 PARK AVENUE SOUTH
    		STREET 2:		FLOOR 6
    		CITY:			NEW YORK
    		STATE:			NY
    		ZIP:			10010
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEFA14A
    <SEQUENCE>1
    <FILENAME>defa14a_2025.htm
    <DESCRIPTION>DEFA14A
    <TEXT>
    Document 1 - file: defa14a_2025.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>img243671806_0.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: img243671806_0.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>img243671806_1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: img243671806_1.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>