<SEC-DOCUMENT>0001193125-24-167893-index.html : 20240625
<SEC-HEADER>0001193125-24-167893.hdr.sgml : 20240625
<ACCEPTANCE-DATETIME>20240625162325
ACCESSION NUMBER:		0001193125-24-167893
CONFORMED SUBMISSION TYPE:	SC 13D
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20240625
DATE AS OF CHANGE:		20240625
GROUP MEMBERS:		JONATHAN FLINT
GROUP MEMBERS:		POLARIS FOUNDERS CAPITAL FUND I, L.P.
GROUP MEMBERS:		POLARIS FOUNDERS CAPITAL FUND II, L.P.
GROUP MEMBERS:		POLARIS FOUNDERS CAPITAL FUND MANAGEMENT CO. I, L.L.C.
GROUP MEMBERS:		POLARIS FOUNDERS CAPITAL FUND MANAGEMENT CO. II, L.L.C.
GROUP MEMBERS:		POLARIS PARTNERS GP IX, L.L.C.
GROUP MEMBERS:		POLARIS PARTNERS IX, L.P.

SUBJECT COMPANY:	

	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
		IRS NUMBER:				810710585
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13D
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-90532
		FILM NUMBER:		241069263

	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

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MCGUIRE TERRANCE
		CENTRAL INDEX KEY:			0001117003
		ORGANIZATION NAME:           	
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13D

	MAIL ADDRESS:	
		STREET 1:		C/O POLARIS VENTURE PARTNERS LP
		STREET 2:		1000 WINTER STREET, SUITE 3350
		CITY:			WALTHAM
		STATE:			MA
		ZIP:			02154
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13D
<SEQUENCE>1
<FILENAME>d780356dsc13d.htm
<DESCRIPTION>SC 13D
<TEXT>
Document 1 - file: d780356dsc13d.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>d780356dex991.htm
<DESCRIPTION>EX-99.1
<TEXT>
Document 2 - file: d780356dex991.htm

</DOCUMENT>
</SEC-DOCUMENT>