<SEC-DOCUMENT>0001843393-26-000003-index.html : 20260507
<SEC-HEADER>0001843393-26-000003.hdr.sgml : 20260507
<ACCEPTANCE-DATETIME>20260507202230
ACCESSION NUMBER:		0001843393-26-000003
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20260505
FILED AS OF DATE:		20260507
DATE AS OF CHANGE:		20260507

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Callori Fred
		CENTRAL INDEX KEY:			0001843393
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39503
		FILM NUMBER:		26955621

	MAIL ADDRESS:	
		STREET 1:		100 HIGH STREET
		STREET 2:		28TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02110

ISSUER:		

	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

	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
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>form3-05082026_120524.xml
<TEXT>
Document 1 - file: form3-05082026_120524.html

Document 1 - RAW XML: form3-05082026_120524.xml

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>ex24-05082026_120527.htm
<TEXT>
Document 2 - file: ex24-05082026_120527.htm

</DOCUMENT>
</SEC-DOCUMENT>