<SEC-DOCUMENT>0001104659-24-111899-index.html : 20241028
<SEC-HEADER>0001104659-24-111899.hdr.sgml : 20241028
<ACCEPTANCE-DATETIME>20241028180843
ACCESSION NUMBER:		0001104659-24-111899
CONFORMED SUBMISSION TYPE:	SC 13D/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20241028
DATE AS OF CHANGE:		20241028
GROUP MEMBERS:		ATLAS VENTURE ASSOCIATES OPPORTUNITY I, L.P.
GROUP MEMBERS:		ATLAS VENTURE ASSOCIATES OPPORTUNITY I, LLC
GROUP MEMBERS:		ATLAS VENTURE ASSOCIATES X, L.P.
GROUP MEMBERS:		ATLAS VENTURE ASSOCIATES X, LLC
GROUP MEMBERS:		ATLAS VENTURE OPPORTUNITY FUND I, 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/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-90532
		FILM NUMBER:		241402165

	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:			Atlas Venture Fund X, L.P.
		CENTRAL INDEX KEY:			0001628098
		ORGANIZATION NAME:           	
		IRS NUMBER:				472435989
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13D/A

	BUSINESS ADDRESS:	
		STREET 1:		400 TECHNOLOGY SQUARE
		STREET 2:		10TH FLOOR
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02139
		BUSINESS PHONE:		857-201-2700

	MAIL ADDRESS:	
		STREET 1:		400 TECHNOLOGY SQUARE
		STREET 2:		10TH FLOOR
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02139
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13D/A
<SEQUENCE>1
<FILENAME>tm2426988d1_sc13da.htm
<DESCRIPTION>SC 13D/A
<TEXT>
Document 1 - file: tm2426988d1_sc13da.htm

</DOCUMENT>
</SEC-DOCUMENT>