# EDGAR Filing Document

**Accession Number:** 0002081043
**File Stem:** 9999999995-25-003083
**Filing Date:** 2025-9
**Character Count:** 1420
**Document Hash:** 833cdf2aa27b91ce767fb09d36663041
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**9999999995-25-003083.hdr.sgml**: 20250925

**ACCESSION NUMBER**: 9999999995-25-003083

**CONFORMED SUBMISSION TYPE**: EFFECT

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20250924

**DATE AS OF CHANGE**: 20250925

**EFFECTIVENESS DATE**: 20250924

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** atai Life Sciences Luxembourg S.A.
- **CENTRAL INDEX KEY:** 0002081043
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 000000000
- **STATE OF INCORPORATION:** N4
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** EFFECT
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-290446
- **FILM NUMBER:** 251340142

**BUSINESS ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** PROFESSOR J.H. BAVINCKLAAN 7
- **CITY:** AMSTELVEEN
- **PROVINCE COUNTRY:** P7
- **ZIP:** 1183 AT
- **BUSINESS PHONE:** 31207932536

**MAIL ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** PROFESSOR J.H. BAVINCKLAAN 7
- **CITY:** AMSTELVEEN
- **PROVINCE COUNTRY:** P7
- **ZIP:** 1183 AT

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

## Notice of Effectiveness

**Date:** September 24, 2025

**Time:** 16:00:00

**Form Type:** S-4

---

**CIK:** 0002081043

**Company Name:** atai Life Sciences Luxembourg S.A.

**File Number:** 333-290446