Tecogen INC Form 4 insider transactions

Stephen Lafaille, VP of Business Development at Tecogen Inc., executed and sold 60,000 shares of common stock in June 2025, realizing approximately $345,800 in proceeds.

Robert A. Panora, Chief Operating Officer and President of Tecogen Inc., has exercised stock options to acquire 95,223 shares of common stock, increasing his direct beneficial ownership to 165,223 shares.

Tecogen Inc.'s Chief Operating Officer and President, Robert A. Panora, has exercised 70,000 stock options at a price of $0.71 per share, as reported in a recent SEC Form 4 filing.

Director Earl R. Lewis reports acquiring additional Tecogen Inc. shares through multiple transactions on May 6, 2025, increasing his total holdings.

Director Earl R. Lewis acquired 240,256 shares of Tecogen Inc. common stock on May 1, 2025, as payment for a promissory note.

Director Earl R. Lewis exercised stock options to acquire 100,000 shares of Tecogen Inc. at $0.71 per share.

Earl R. Lewis, a director at Tecogen Inc., filed an amendment to a previous Form 4 to correct an overstatement of share balance due to a duplicative filing.

Director Earl R. Lewis files an amended Form 4 to correct an overstatement of share balance due to a duplicative filing regarding a purchase of 10,000 shares of Tecogen Inc. (TGEN) common stock.

Director Earl R. Lewis of Tecogen Inc. purchased 100,000 shares of common stock at $0.71 per share on November 22, 2024.

Tecogen director Earl R. Lewis purchased 2,000 shares of common stock at $0.80 per share, increasing his direct holdings to 637,000 shares.

Director John Hatsopoulos of Tecogen Inc. (TGEN) purchased 10,000 shares of common stock at $0.838 per share, increasing his total holdings to 988,951 shares.

Director John Hatsopoulos of Tecogen Inc. (TGEN) acquired 10,000 shares of common stock at $0.8597 per share on September 25, 2024, increasing his direct holdings to 978,951 shares.

Director John Hatsopoulos of Tecogen Inc. (TGEN) purchased 10,000 shares of common stock at $0.895 per share on August 19, 2024, increasing his direct holdings.

Director Earl R. Lewis reports purchasing 10,000 shares of Tecogen Inc. through his wife, increasing his indirect holdings.

Director Earl R. Lewis purchased 10,000 shares of Tecogen Inc. (TGEN) common stock at $0.68 per share on July 15, 2024.

John Hatsopoulos, a director at Tecogen Inc., acquired 22,466 shares of common stock at $0.65 per share, increasing his direct holdings to 958,951 shares.

Ahmed Ghoniem, a director of Tecogen Inc., reports the acquisition of stock options exercisable for 25,000 shares of common stock.

Director Angelina Galiteva reports acquisition of stock options in Tecogen Inc.

Director Susan B. Hirsch acquired 25,000 stock options in Tecogen Inc. on June 6, 2024.

Director John M. Albertine reports acquisition of stock options in Tecogen Inc.

Director Earl R. Lewis reports acquisition of stock options in Tecogen Inc.

Director John Hatsopoulos increased his holdings in Tecogen Inc. (TGEN) by purchasing 1,265 shares of common stock at $0.8 per share on May 28, 2024.

Director John Hatsopoulos purchased 10,000 shares of Tecogen Inc. (TGEN) at $0.80 per share, increasing his direct holdings to 935,220 shares.

Director John Hatsopoulos reports acquiring additional shares of Tecogen Inc. (TGEN) through open market purchases.

Director John Hatsopoulos increased his holdings in Tecogen Inc. (TGEN) by purchasing 13,800 shares of common stock at $0.79 per share on May 21, 2024.

John Hatsopoulos, a director at Tecogen Inc. (TGEN), recently acquired 3,000 shares of common stock at a price of $0.7493 per share.

John Hatsopoulos, a director at Tecogen, recently purchased 10,000 shares of the company's common stock at $0.74 per share.

Director Earl R. Lewis of Tecogen Inc. (TGEN) purchased 5,000 shares of common stock at $0.75 per share on May 1, 2024, increasing his total holdings to 615,000 shares.

Director Earl R. Lewis of Tecogen Inc. (TGEN) acquired 10,000 shares of common stock at $0.68 per share, increasing his total holdings to 610,000 shares.

Director John Hatsopoulos of Tecogen Inc. (TGEN) recently purchased 5,000 shares of common stock, increasing his total holdings to 886,485 shares.