# EDGAR Filing Document

**Accession Number:** 0001840233
**File Stem:** 9999999995-26-001811
**Filing Date:** 2026-5
**Character Count:** 1261
**Document Hash:** d6bf4c1e2b35c4102839d0255cd598b2
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**9999999995-26-001811.hdr.sgml**: 20260601

**ACCESSION NUMBER**: 9999999995-26-001811

**CONFORMED SUBMISSION TYPE**: EFFECT

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260529

**DATE AS OF CHANGE**: 20260601

**EFFECTIVENESS DATE**: 20260529

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Xilio Therapeutics, Inc.
- **CENTRAL INDEX KEY:** 0001840233
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 851623397
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** EFFECT
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-295785
- **FILM NUMBER:** 261046919

**BUSINESS ADDRESS:**
- **STREET 1:** 828 WINTER STREET
- **CITY:** WALTHAM
- **STATE:** MA
- **ZIP:** 02451
- **BUSINESS PHONE:** 617-833-1027

**MAIL ADDRESS:**
- **STREET 1:** 828 WINTER STREET
- **CITY:** WALTHAM
- **STATE:** MA
- **ZIP:** 02451

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

## Notice of Effectiveness

**Date:** May 29, 2026

**Time:** 16:00:00

**Form Type:** S-3

---

**CIK:** 0001840233

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

**File Number:** 333-295785