HATSOPOULOS JOHN has filed 29 insider transactions across 1 company since January 2024.
Most recent transaction: a option exercise of 50000 shares of TECOGEN INC. ($TGEN) on March 20, 2026.
Activity breakdown: 27 open-market purchases and 0 sales.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 20, 2026 | TECOGEN INC. | $TGEN | Hatsopoulos John | Director | M | Common Stock | 50000 | $0.88 | 1,038,951.0000 | 29,846,479 | 5.06% | 0.17% |
| March 20, 2026 | TECOGEN INC. | $TGEN | Hatsopoulos John | Director | M | Stock Option (Right to Buy) | 50000 | $0.88 | 0.0000 | 29,846,479 | 100.00% | 0.17% |
| Sept. 27, 2024 | TECOGEN INC. | $TGEN | HATSOPOULOS JOHN | Director | P | Common Stock | 10000 | $0.84 | 988,951.0000 | 0 | 1.02% | 0.00% |
| Sept. 25, 2024 | TECOGEN INC. | $TGEN | HATSOPOULOS JOHN | Director | P | Common Stock | 10000 | $0.86 | 978,951.0000 | 0 | 1.03% | 0.00% |
| Aug. 19, 2024 | TECOGEN INC. | $TGEN | HATSOPOULOS JOHN | Director | P | Common Stock | 10000 | $0.90 | 968,951.0000 | 0 | 1.04% | 0.00% |
| July 10, 2024 | TECOGEN INC. | $TGEN | HATSOPOULOS JOHN | Director | P | Common Stock | 22466 | $0.65 | 958,951.0000 | 0 | 2.40% | 0.00% |
| May 28, 2024 | TECOGEN INC. | $TGEN | HATSOPOULOS JOHN | Director | P | Common Stock | 1265 | $0.80 | 936,485.0000 | 0 | 0.14% | 0.00% |
| May 29, 2024 | TECOGEN INC. | $TGEN | HATSOPOULOS JOHN | Director | P | Common Stock | 10000 | $0.80 | 935,220.0000 | 0 | 1.08% | 0.00% |
| May 22, 2024 | TECOGEN INC. | $TGEN | HATSOPOULOS JOHN | Director | P | Common Stock | 3200 | $0.79 | 916,485.0000 | 0 | 0.35% | 0.00% |
| May 24, 2024 | TECOGEN INC. | $TGEN | HATSOPOULOS JOHN | Director | P | Common Stock | 8735 | $0.80 | 925,220.0000 | 0 | 0.95% | 0.00% |
| May 21, 2024 | TECOGEN INC. | $TGEN | HATSOPOULOS JOHN | Director | P | Common Stock | 13800 | $0.79 | 913,285.0000 | 0 | 1.53% | 0.00% |
| May 16, 2024 | TECOGEN INC. | $TGEN | HATSOPOULOS JOHN | Director | P | Common Stock | 3000 | $0.75 | 899,485.0000 | 0 | 0.33% | 0.00% |
| May 15, 2024 | TECOGEN INC. | $TGEN | HATSOPOULOS JOHN | Director | P | Common Stock | 10000 | $0.74 | 896,485.0000 | 0 | 1.13% | 0.00% |
| April 24, 2024 | TECOGEN INC. | $TGEN | HATSOPOULOS JOHN | Director | P | Common Stock | 5000 | $0.67 | 886,485.0000 | 0 | 0.57% | 0.00% |
| April 23, 2024 | TECOGEN INC. | $TGEN | HATSOPOULOS JOHN | Director | P | Common Stock | 1000 | $0.68 | 881,485.0000 | 0 | 0.11% | 0.00% |
| April 23, 2024 | TECOGEN INC. | $TGEN | HATSOPOULOS JOHN | Director | P | Common Stock | 5000 | $0.69 | 880,485.0000 | 0 | 0.57% | 0.00% |
| April 16, 2024 | TECOGEN INC. | $TGEN | HATSOPOULOS JOHN | Director | P | Common Stock | 1000 | $0.68 | 875,485.0000 | 0 | 0.11% | 0.00% |
| April 15, 2024 | TECOGEN INC. | $TGEN | HATSOPOULOS JOHN | Director | P | Common Stock | 1000 | $0.70 | 874,485.0000 | 0 | 0.11% | 0.00% |
| April 12, 2024 | TECOGEN INC. | $TGEN | HATSOPOULOS JOHN | Director | P | Common Stock | 1000 | $0.70 | 873,485.0000 | 0 | 0.11% | 0.00% |
| April 11, 2024 | TECOGEN INC. | $TGEN | HATSOPOULOS JOHN | Director | P | Common Stock | 1000 | $0.70 | 872,485.0000 | 0 | 0.11% | 0.00% |
| April 9, 2024 | TECOGEN INC. | $TGEN | HATSOPOULOS JOHN | Director | P | Common Stock | 1000 | $0.70 | 871,485.0000 | 0 | 0.11% | 0.00% |
| April 8, 2024 | TECOGEN INC. | $TGEN | HATSOPOULOS JOHN | Director | P | Common Stock | 1000 | $0.70 | 870,485.0000 | 0 | 0.12% | 0.00% |
| March 28, 2024 | TECOGEN INC. | $TGEN | HATSOPOULOS JOHN | Director | P | Common Stock | 2388 | $0.70 | 863,873.0000 | 0 | 0.28% | 0.00% |
| April 1, 2024 | TECOGEN INC. | $TGEN | HATSOPOULOS JOHN | Director | P | Common Stock | 5000 | $0.70 | 869,485.0000 | 0 | 0.58% | 0.00% |
| April 1, 2024 | TECOGEN INC. | $TGEN | HATSOPOULOS JOHN | Director | P | Common Stock | 612 | $0.70 | 864,485.0000 | 0 | 0.07% | 0.00% |
| March 27, 2024 | TECOGEN INC. | $TGEN | HATSOPOULOS JOHN | Director | P | Common Stock | 2000 | $0.70 | 861,485.0000 | 0 | 0.23% | 0.00% |
| Jan. 22, 2024 | TECOGEN INC. | $TGEN | HATSOPOULOS JOHN | Director | P | Common Stock | 10000 | $0.77 | 859,485.0000 | 0 | 1.18% | 0.00% |
| Jan. 18, 2024 | TECOGEN INC. | $TGEN | HATSOPOULOS JOHN | Director | P | Common Stock | 10000 | $0.73 | 849,485.0000 | 0 | 1.19% | 0.00% |
| Jan. 16, 2024 | TECOGEN INC. | $TGEN | HATSOPOULOS JOHN | Director | P | Common Stock | 100000 | $0.73 | 839,485.0000 | 0 | 13.52% | 0.00% |