    <SEC-DOCUMENT>0001193125-23-118521-index.html : 20230426
    <SEC-HEADER>0001193125-23-118521.hdr.sgml : 20230426
    <ACCEPTANCE-DATETIME>20230426161034
    ACCESSION NUMBER:		0001193125-23-118521
    CONFORMED SUBMISSION TYPE:	ARS
    PUBLIC DOCUMENT COUNT:		1
    CONFORMED PERIOD OF REPORT:	20221231
    FILED AS OF DATE:		20230426
    DATE AS OF CHANGE:		20230426
    EFFECTIVENESS DATE:		20230426

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			IO Biotech, Inc.
    		CENTRAL INDEX KEY:			0001865494
    		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
    		IRS NUMBER:				870909276
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		ARS
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-41008
    		FILM NUMBER:		23849823

    	BUSINESS ADDRESS:
    		STREET 1:		OLE MAALOES VEH 3
    		CITY:			COPENHAGEN
    		STATE:			G7
    		ZIP:			2200
    		BUSINESS PHONE:		4570702980

    	MAIL ADDRESS:
    		STREET 1:		OLE MAALOES VEH 3
    		CITY:			COPENHAGEN
    		STATE:			G7
    		ZIP:			2200
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>ARS
    <SEQUENCE>1
    <FILENAME>d722878dars.pdf
    <DESCRIPTION>ARS
    <TEXT>
    Document 1 - file: d722878dars.pdf

    </DOCUMENT>
    </SEC-DOCUMENT>