# EDGAR Filing Document

**Accession Number:** 0001808865
**File Stem:** 9999999995-25-002827
**Filing Date:** 2025-9
**Character Count:** 1408
**Document Hash:** 528b7e44d6f7466479c66457a098e75e
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**9999999995-25-002827.hdr.sgml**: 20250905

**ACCESSION NUMBER**: 9999999995-25-002827

**CONFORMED SUBMISSION TYPE**: EFFECT

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20250904

**DATE AS OF CHANGE**: 20250905

**EFFECTIVENESS DATE**: 20250904

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** iTeos Therapeutics, Inc.
- **CENTRAL INDEX KEY:** 0001808865
- **STANDARD INDUSTRIAL CLASSIFICATION:** BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** EFFECT
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-271793
- **FILM NUMBER:** 251294904

**BUSINESS ADDRESS:**
- **STREET 1:** 321 ARSENAL STREET
- **STREET 2:** BLDG 312, FLOOR 3, SUITE 301
- **CITY:** WATERTOWN
- **STATE:** MA
- **ZIP:** 02472
- **BUSINESS PHONE:** 857-204-4583

**MAIL ADDRESS:**
- **STREET 1:** 321 ARSENAL STREET
- **STREET 2:** BLDG 312, FLOOR 3, SUITE 301
- **CITY:** WATERTOWN
- **STATE:** MA
- **ZIP:** 02472

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

## Notice of Effectiveness

**Date:** September 4, 2025

**Accession Number:** 0001140361-25-033424

**Form Type:** POS AM

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**CIK:** 0001808865

**Company Name:** iTeos Therapeutics, Inc.

**File Number:** 333-271793