<SEC-DOCUMENT>0001193125-25-159404-index.html : 20250715
<SEC-HEADER>0001193125-25-159404.hdr.sgml : 20250715
<ACCEPTANCE-DATETIME>20250715165902
ACCESSION NUMBER:		0001193125-25-159404
CONFORMED SUBMISSION TYPE:	424B3
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20250715
DATE AS OF CHANGE:		20250715

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Tectonic Therapeutic, Inc.
		CENTRAL INDEX KEY:			0001681087
		STANDARD INDUSTRIAL CLASSIFICATION:	BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
		ORGANIZATION NAME:           	03 Life Sciences
		EIN:				810710585
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		424B3
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-288539
		FILM NUMBER:		251125385

	BUSINESS ADDRESS:	
		STREET 1:		490 ARSENAL WAY
		STREET 2:		SUITE 210
		CITY:			WATERTOWN
		STATE:			MA
		ZIP:			02472
		BUSINESS PHONE:		(339) 666-3320

	MAIL ADDRESS:	
		STREET 1:		490 ARSENAL WAY
		STREET 2:		SUITE 210
		CITY:			WATERTOWN
		STATE:			MA
		ZIP:			02472

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	AVROBIO, Inc.
		DATE OF NAME CHANGE:	20180131

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	AvroBio, Inc.
		DATE OF NAME CHANGE:	20160729
</SEC-HEADER>
<DOCUMENT>
<TYPE>424B3
<SEQUENCE>1
<FILENAME>d49849d424b3.htm
<DESCRIPTION>424B3
<TEXT>
Document 1 - file: d49849d424b3.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g49849g04g04.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: g49849g04g04.jpg

</DOCUMENT>
</SEC-DOCUMENT>