John Hatsopoulos

Companies

• TECOGEN INC.Board member Oct 1, 2013 to now¹
• TECOGEN INC.Chief executive officer Oct 1, 2013 to May 25, 2017¹
• AgenusBoard member Jun 18, 2007 to Dec 12, 2011²

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• TTECOGEN INC. TGEN1,114,513 shares³$2.5M at $2.28Mar 20, 2026

As of each latest filing. The line shows shares held over time.

Recent filings

• Mar 20, 2026Exercised options 50,000 shares at $0.88 of TECOGEN INC.³
• Sep 27, 2024Bought 10,000 shares at $0.84 of TECOGEN INC.⁴
• Sep 25, 2024Bought 10,000 shares at $0.86 of TECOGEN INC.⁵
• Aug 19, 2024Bought 10,000 shares at $0.90 of TECOGEN INC.⁶
• Jul 10, 2024Bought 22,466 shares at $0.65 of TECOGEN INC.⁷
• May 29, 2024Bought 10,000 shares at $0.80 of TECOGEN INC.⁸
• May 28, 2024Bought 1,265 shares at $0.80 of TECOGEN INC.⁹
• May 24, 2024Bought 8,735 shares at $0.80 of TECOGEN INC.¹⁰
• May 22, 2024Bought 3,200 shares at $0.79 of TECOGEN INC.¹⁰
• May 21, 2024Bought 13,800 shares at $0.79 of TECOGEN INC.¹¹
• May 16, 2024Bought 3,000 shares at $0.75 of TECOGEN INC.¹²
• May 15, 2024Bought 10,000 shares at $0.74 of TECOGEN INC.¹³
• Apr 24, 2024Bought 5,000 shares at $0.67 of TECOGEN INC.¹⁴
• Apr 23, 2024Bought 1,000 shares at $0.68 of TECOGEN INC.¹⁵
• Apr 23, 2024Bought 5,000 shares at $0.69 of TECOGEN INC.¹⁵
• Apr 16, 2024Bought 1,000 shares at $0.68 of TECOGEN INC.¹⁶
• Apr 15, 2024Bought 1,000 shares at $0.70 of TECOGEN INC.¹⁷
• Apr 12, 2024Bought 1,000 shares at $0.70 of TECOGEN INC.¹⁸
• Apr 11, 2024Bought 1,000 shares at $0.70 of TECOGEN INC.¹⁹
• Apr 9, 2024Bought 1,000 shares at $0.70 of TECOGEN INC.²⁰
• Apr 8, 2024Bought 1,000 shares at $0.70 of TECOGEN INC.²¹
• Apr 1, 2024Bought 5,000 shares at $0.70 of TECOGEN INC.²²
• Apr 1, 2024Bought 612 shares at $0.70 of TECOGEN INC.²²
• Mar 28, 2024Bought 2,388 shares at $0.70 of TECOGEN INC.²²
• Mar 27, 2024Bought 2,000 shares at $0.70 of TECOGEN INC.²²