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← US public companies

Hatsopoulos John

SEC-identified person · CIK 1274775 Identifier-verified

Public-company roles (from insider filings)

CompanyCapacity as filedFilings
Tecogen INC. TGEN Director · Co-Chief Executive Officer filed 2013–2026
American DG Energy INC ADGE Director · Co-Chief Executive Officer filed 2007–2017
Eurosite Power INC. N/A Director · Chairman of the Board filed 2011–2016
Antigenics INC /DE/ agend Director filed 2007–2011
American Caresource Holdings, Inc. XSI Director filed 2008–2010
Glenrose Instruments Inc. NONR Director · Chairman of the Board filed 2007–2008

All roles under one Commission-assigned identifier - the same person by the SEC's own record, not by name matching. From the SEC's insider-transaction filings (Forms 3, 4 and 5). Every reporting director and officer carries a Commission-assigned identifier (CIK), so these footprints are identifier-verified - no name matching involved. Insiders file when they transact, so dates are filing dates: "last filed" never means "served until". This layer is not yet joined to the nonprofit register - identity joins ship only after independent review.