    <SEC-DOCUMENT>0001193125-22-104271-index.html : 20220413
    <SEC-HEADER>0001193125-22-104271.hdr.sgml : 20220413
    <ACCEPTANCE-DATETIME>20220413160755
    ACCESSION NUMBER:		0001193125-22-104271
    CONFORMED SUBMISSION TYPE:	DEFA14A
    PUBLIC DOCUMENT COUNT:		3
    FILED AS OF DATE:		20220413
    DATE AS OF CHANGE:		20220413

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			4D Molecular Therapeutics Inc.
    		CENTRAL INDEX KEY:			0001650648
    		STANDARD INDUSTRIAL CLASSIFICATION:	BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
    		IRS NUMBER:				473506994
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		DEFA14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-39782
    		FILM NUMBER:		22824791

    	BUSINESS ADDRESS:
    		STREET 1:		5858 HORTON STREET #455
    		CITY:			EMERYVILLE
    		STATE:			CA
    		ZIP:			94608
    		BUSINESS PHONE:		5105052680

    	MAIL ADDRESS:
    		STREET 1:		5858 HORTON STREET #455
    		CITY:			EMERYVILLE
    		STATE:			CA
    		ZIP:			94608

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	4D Molecular Therapeutics Inc
    		DATE OF NAME CHANGE:	20150811
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEFA14A
    <SEQUENCE>1
    <FILENAME>d327559ddefa14a.htm
    <DESCRIPTION>DEFA14A
    <TEXT>
    Document 1 - file: d327559ddefa14a.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>g327559g32d86.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: g327559g32d86.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>g327559g33e15.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: g327559g33e15.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>