John Hatsopoulos

John Hatsopoulos

Founder at TECOGEN INC.

Net worth: 7 M $ as of 31/05/2026

92 year
Electronic Technology
Utilities
Miscellaneous

Profile

John N.
Hatsopoulos
is the founder of GlenRose Instruments, Inc. founded in 1999, serving as Chairman.
Dr. Hatsopoulos was the founder of American DG Energy, Inc. founded in 2001, serving as Director from 2017 to 2018.
Dr. Hatsopoulos is the founder of Tecogen, Inc. founded in 1987, serving as Lead Director.
Dr. Hatsopoulos is also the founder of Thermo Electron Corp...
Dr. Hatsopoulos is currently Director at Lehman Brothers Funds, Inc. since 1999.
Dr. Hatsopoulos is currently Director at Ilios, Inc. Dr. Hatsopoulos is currently Executive Member at J&P Enterprises LLC.
Formerly, Dr. Hatsopoulos was Chairman at Aivita Group, Inc. from 2009 to 2016.
Dr. Hatsopoulos was Director at Lois.
Dr. Hatsopoulos was Director at Intelli-Check, Inc. Dr. Hatsopoulos was Independent Director at Agenus, Inc. in 2011.
Dr. Hatsopoulos was Director at Premier Healthcare Solutions, Inc. Dr. Hatsopoulos was Independent Director at American CareSource Holdings, Inc. from 2011 to 2013.
Dr. Hatsopoulos was Director at American Stock Exchange LLC from 1994 to 2000.
Dr. Hatsopoulos was Director at VIASPACE, Inc. in 2006.
Dr. Hatsopoulos was Director at TEI Biosciences, Inc. Dr. Hatsopoulos was Managing Director & Partner at Alexandros Partners LLC in 2009.
Dr. Hatsopoulos was Director at Ilios, Inc. (Massachusetts).
Dr. Hatsopoulos was Chief Financial Officer at Thermo Instrument Systems, Inc. Dr. Hatsopoulos was Chief Financial Officer at Thermo Process Systems, Inc. Dr. Hatsopoulos was Chief Financial Officer at Thermo Remediation, Inc. Dr. Hatsopoulos was Member at Northeastern University.
Dr. Hatsopoulos completed undergraduate education at Northeastern University.
Dr. Hatsopoulos completed undergraduate education at Athens College.

Known holdings in public companies

CompanyDateNumber of sharesValuationValuation date
08/04/2026 10,70,501 ( 3.58% ) 7 M $ 31/05/2026

John Hatsopoulos active positions

CompaniesPositionStart
TECOGEN INC. Founder 01/01/1987
J&P Enterprises LLC
Corporate Officer/Principal -
Director/Board Member 05/05/2010
Director/Board Member 08/03/2010
Founder 01/01/2005

Former positions of John Hatsopoulos

CompaniesPositionEnd
AMERICAN DG ENERGY INC Founder 29/03/2018
AIVITA GROUP INC. Chairman 16/05/2016
AMERICAN CARESOURCE HOLDINGS, INC. Director/Board Member 30/05/2013
AGENUS INC. Director/Board Member 08/12/2011
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Training of John Hatsopoulos

Experiences
Positions held

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Connections

41

1st degree connections

23

1st degree companies

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Female

Members of the board

Executives

Linked companies

Private companies23

Miscellaneous

Electronic Technology

Electronic Technology

Commercial Services

Technology Services

Health Technology

Miscellaneous

Utilities

Utilities

J&P Enterprises LLC

Commercial Services

Producer Manufacturing

Electronic Technology

Electronic Technology

Health Services

Finance

Consumer Services

Utilities

Health Technology

Finance

Technology Services

Consumer Services

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