<SEC-DOCUMENT>0001537435-25-000122-index.html : 20250728
<SEC-HEADER>0001537435-25-000122.hdr.sgml : 20250728
<ACCEPTANCE-DATETIME>20250728111202
ACCESSION NUMBER:		0001537435-25-000122
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20250724
FILED AS OF DATE:		20250728
DATE AS OF CHANGE:		20250728

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Lafaille Stephen
		CENTRAL INDEX KEY:			0002074096
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36103
		FILM NUMBER:		251154274

	MAIL ADDRESS:	
		STREET 1:		76 TREBLE COVE ROAD
		CITY:			NORTH BILLERICA
		STATE:			MA
		ZIP:			01862

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			TECOGEN INC.
		CENTRAL INDEX KEY:			0001537435
		STANDARD INDUSTRIAL CLASSIFICATION:	AIR COND & WARM AIR HEATING EQUIP & COMM & INDL REFRIG EQUIP [3585]
		ORGANIZATION NAME:           	06 Technology
		EIN:				043536131
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		76 TREBLE COVE ROAD
		STREET 2:		BLDG. 1
		CITY:			NORTH BILLERICA
		STATE:			MA
		ZIP:			01862
		BUSINESS PHONE:		781-466-6400

	MAIL ADDRESS:	
		STREET 1:		76 TREBLE COVE ROAD
		STREET 2:		BLDG. 1
		CITY:			NORTH BILLERICA
		STATE:			MA
		ZIP:			01862

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	TECOGEN INC
		DATE OF NAME CHANGE:	20111215
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wk-form4_1753715518.xml
<DESCRIPTION>FORM 4
<TEXT>
Document 1 - file: wk-form4_1753715518.html

Document 1 - RAW XML: wk-form4_1753715518.xml

</DOCUMENT>
</SEC-DOCUMENT>