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TECOGEN INC.

  • CIK: 0001537435
  • EIN: 04-3536131
  • Business address: 45 FIRST AVENUE, WALTHAM, Massachusetts, 02451

Information

  • Mailing address
    45 FIRST AVENUE, WALTHAM, Delaware, 02451
  • Phone
    781-466-6400
  • State location
    Massachusetts
  • State of incorporation
    Delaware
  • Fiscal year end
    December 31
  • SIC
    3585 - (CF Office: Office of Technology) AIR-COND & WARM AIR HEATG EQUIP & COMM & INDL REFRIG EQUIP
  • Filings
    N/A

About TECOGEN INC.

TECOGEN INC. (CIK: 0001537435) is an American company incorporated in the state of Massachusetts. Head office is located at 45 FIRST AVENUE, WALTHAM, Massachusetts, 02451. Work in the industry 3585 - (CF Office: Office of Technology) AIR-COND & WARM AIR HEATG EQUIP & COMM & INDL REFRIG EQUIP. TECOGEN INC. is a public company and trade via Over-The-Counter (OTC).

Old names:

  • TECOGEN INC from 2011-22-Dec to 2013-27-Mar

Ownership

Owner Filings Transaction Date Type of Owner
ALBERTINE JOHN M 0001015997 Dec-19-2022 director
Pacheco Ann Marie Brown 0001748455 May-04-2022 10 percent owner, other: Trustee
Rangesh Abinand 0001917503 Mar-09-2022 director, officer: Chief Financial Officer
Jenkins Ralph 0001917530 Mar-09-2022 director
HOLUBOW FRED 0000905478 Jun-05-2020 director
Whiting John Kimball IV 0001808199 Apr-02-2020 officer: General Counsel & Secretary
Petersen Deanna M 0001493139 Dec-31-2017 director
Monovoukas Yiannis 0001331211 May-23-2017 10 percent owner
Davidson Keith 0001684929 Sep-02-2016 director
Benjamin Locke M. 0001625781 Oct-29-2014 officer: Co-CEO
GARRISON DAVID A 0001259993 Aug-15-2014 officer: CFO, Treasurer and Secretary
LEWIS EARL R 0001230427 Jul-07-2014 director
HATSOPOULOS GEORGE N 0001015999 Oct-01-2013 director, 10 percent owner
MAXWELL CHARLEST 0001193409 Oct-01-2013 director
HATSOPOULOS JOHN 0001274775 Oct-01-2013 director, 10 percent owner, officer: Chief Executive Officer
GHONIEM AHMED 0001538368 Oct-01-2013 director
PANORA ROBERT A 0001585814 Oct-01-2013 officer: COO and President
BROWN BONNIE JEAN 0001585816 Oct-01-2013 officer: CFO, Treasurer and Secretary
AOUN JOSEPH E 0001586833 Oct-01-2013 director
GALITEVA ANGELINA 0001587245 Oct-01-2013 director
J&P ENTERPRISES LLC 0001587506 Oct-01-2013 10 percent owner
HATSOPOULOS FAMILY 2012 TRUST 0001587831 Oct-01-2013 10 percent owner

Stock Chart

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Jobs

Coming soon!

Recent SEC Filings

Includes all SEC registration details as well as a list of all documents (S-1, Prospectus, Current Reports, 8-K, 10K, Annual Reports) filed by TECOGEN INC.

Filings Format Description Filed/Effective File/Film Number
SCHEDULE 13G/A Document Acc-no: 0000905148-25-002985 (34 Act) Size: KB Aug-14-2025

005-88720

251221169
10-Q Document

Quarterly report pursuant to sections 13 or 15(d)

Acc-no: 0001537435-25-000131 (34 Act) Size: KB		 Aug-13-2025

001-36103

251209168
8-K Document

Current report filing

Acc-no: 0001537435-25-000129 (34 Act) Size: KB		 Aug-12-2025

001-36103

251208123
4 Document

Statement of changes in beneficial ownership of securities

Acc-no: 0001537435-25-000125 ( Act) Size: 0 KB		 Jul-28-2025

4 Document

Statement of changes in beneficial ownership of securities

Acc-no: 0001537435-25-000122 ( Act) Size: 0 KB		 Jul-28-2025

4 Document

Statement of changes in beneficial ownership of securities

Acc-no: 0001537435-25-000120 ( Act) Size: 0 KB		 Jul-28-2025

4 Document

Statement of changes in beneficial ownership of securities

Acc-no: 0001537435-25-000119 ( Act) Size: 0 KB		 Jul-28-2025

4 Document

Statement of changes in beneficial ownership of securities

Acc-no: 0001537435-25-000118 ( Act) Size: 0 KB		 Jul-28-2025

4 Document

Statement of changes in beneficial ownership of securities

Acc-no: 0001537435-25-000117 ( Act) Size: 0 KB		 Jul-28-2025

4 Document

Statement of changes in beneficial ownership of securities

Acc-no: 0001537435-25-000116 ( Act) Size: 0 KB		 Jul-28-2025

4 Document

Statement of changes in beneficial ownership of securities

Acc-no: 0001537435-25-000115 ( Act) Size: 0 KB		 Jul-28-2025

4 Document

Statement of changes in beneficial ownership of securities

Acc-no: 0001537435-25-000113 ( Act) Size: 0 KB		 Jul-28-2025

8-K Document

Current report filing

Acc-no: 0001537435-25-000111 (34 Act) Size: KB		 Jul-28-2025

001-36103

251153811
8-K Document

Current report filing

Acc-no: 0001537435-25-000097 (34 Act) Size: KB		 Jul-21-2025

001-36103

251136881
424B4 Document

Prospectus filed pursuant to Rule 424(b)(4)

Acc-no: 0001537435-25-000095 (33 Act) Size: KB		 Jul-21-2025

333-288740

251136426
8-K Document

Current report filing

Acc-no: 0001537435-25-000092 (34 Act) Size: KB		 Jul-18-2025

001-36103

251132660
EFFECT Document Acc-no: 9999999995-25-002275 (33 Act) Size: KB Jul-17-2025

333-288668

251132550
S-1MEF Document

A new registration statement filed under Rule 462(b) to add securities to a prior related effective registration statement filed on Form S 1

Acc-no: 0001537435-25-000088 (33 Act) Size: KB		 Jul-17-2025

333-288740

251132537
S-1/A Document

Amendment to General form of registration statement for all companies including face-amount certificate companies

Acc-no: 0001537435-25-000086 (33 Act) Size: KB		 Jul-16-2025

333-288668

251128074
S-1/A Document

Amendment to General form of registration statement for all companies including face-amount certificate companies

Acc-no: 0001537435-25-000083 (33 Act) Size: KB		 Jul-16-2025

333-288668

251127732

Recent 20 filings. View all TECOGEN INC. filings

Reviews

Overall rating 5.0

Aug 22, 2022

Jean Bishop

Very good communication and delivery made within the timeframe I was advised of

Aug 22, 2022

Catherine

Thanks I look forward to using the product to improve my skin tone

Aug 22, 2022

Samuel Ejimofor

It's being easier working on the website. And I recommend, it's a great website

Frequently Asked Questions

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Disclaimer: The information on the Service is provided with the understanding that the Company is not herein engaged in rendering legal, accounting, tax, or other professional advice and services. As such, it should not be used as a substitute for consultation with professional accounting, tax, legal or other competent advisers.

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