<SEC-DOCUMENT>0001537435-23-000047-index.html : 20230516
<SEC-HEADER>0001537435-23-000047.hdr.sgml : 20230516
<ACCEPTANCE-DATETIME>20230516181100
ACCESSION NUMBER:		0001537435-23-000047
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20230515
FILED AS OF DATE:		20230516
DATE AS OF CHANGE:		20230516

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			HATSOPOULOS JOHN
		CENTRAL INDEX KEY:			0001274775

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36103
		FILM NUMBER:		23929080

	MAIL ADDRESS:	
		STREET 1:		85 FIRST AVENUE
		CITY:			WALTHAM
		STATE:			MA
		ZIP:			02451

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]
		IRS NUMBER:				043536131
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		45 FIRST AVENUE
		CITY:			WALTHAM
		STATE:			MA
		ZIP:			02451
		BUSINESS PHONE:		781-466-6400

	MAIL ADDRESS:	
		STREET 1:		45 FIRST AVENUE
		CITY:			WALTHAM
		STATE:			MA
		ZIP:			02451

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	TECOGEN INC
		DATE OF NAME CHANGE:	20111215
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_168427504417659.xml
<DESCRIPTION>FORM 4
<TEXT>
Document 1 - file: wf-form4_168427504417659.html

Document 1 - RAW XML: wf-form4_168427504417659.xml

</DOCUMENT>
</SEC-DOCUMENT>