# EDGAR Filing Document

**Accession Number:** 0001865494
**File Stem:** 9999999995-25-001891
**Filing Date:** 2025-6
**Character Count:** 1248
**Document Hash:** 88533a6d3b6a763c85afa5737d07ee12
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**9999999995-25-001891.hdr.sgml**: 20250612

**ACCESSION NUMBER**: 9999999995-25-001891

**CONFORMED SUBMISSION TYPE**: EFFECT

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20250611

**DATE AS OF CHANGE**: 20250612

**EFFECTIVENESS DATE**: 20250611

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** IO Biotech, Inc.
- **CENTRAL INDEX KEY:** 0001865494
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 870909276
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** EFFECT
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-287554
- **FILM NUMBER:** 251041568

**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

### UNITED STATES
### SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## Notice of Effectiveness

**Date:** June 11, 2025

**Time:** 16:00:00

**Form Type:** S-3

---

**CIK:** 0001865494

**Company Name:** IO Biotech, Inc.

**File Number:** 333-287554