# EDGAR Filing Document

**Accession Number:** 0001620463
**File Stem:** 0001193125-26-217029
**Filing Date:** 2026-5
**Character Count:** 1345
**Document Hash:** 4a16883cd98004b02a3370f2ae39b4ae
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-217029.hdr.sgml**: 20260511

**ACCESSION NUMBER**: 0001193125-26-217029

**CONFORMED SUBMISSION TYPE**: ARS

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20251231

**FILED AS OF DATE**: 20260511

**DATE AS OF CHANGE**: 20260511

**EFFECTIVENESS DATE**: 20260511

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** LeonaBio, Inc.
- **CENTRAL INDEX KEY:** 0001620463
- **STANDARD INDUSTRIAL CLASSIFICATION:** BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 453368487
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** ARS
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-39503
- **FILM NUMBER:** 26964201

**BUSINESS ADDRESS:**
- **STREET 1:** 18706 NORTH CREEK PARKWAY, SUITE 104
- **CITY:** BOTHELL
- **STATE:** WA
- **ZIP:** 98011
- **BUSINESS PHONE:** (425) 620-8501

**MAIL ADDRESS:**
- **STREET 1:** 18706 NORTH CREEK PARKWAY, SUITE 104
- **CITY:** BOTHELL
- **STATE:** WA
- **ZIP:** 98011

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Athira Pharma, Inc.
- **DATE OF NAME CHANGE:** 20190916

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** M3 Biotechnology, Inc.
- **DATE OF NAME CHANGE:** 20140924

### Attached PDF Documents

**Attachment 1:** `2026_ars2.pdf`

_No text found in this document._