According to recent filings covering the 90 days ending February 19, 2026, the three most significant insider holders at Tecogen are Director Earl R Lewis (1.64Mn shares), Director John Hatsopoulos (988.95K shares), Director Susan B Hirsch (250.42K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Earl R Lewis | 1,636,006 | 07 May, 2025 | |
| John Hatsopoulos | 988,951 | 27 Sep, 2024 | |
| Susan B Hirsch | 250,416 | 20 Oct, 2023 | |
| Robert A Panora | Coo And President | 165,223 | 20 Jun, 2025 |
| Abinand Rangesh | Chief Executive Officer | 64,193 | 28 Jul, 2025 |
| Roger P. Deschenes | Cao | 42,962 | 28 Jul, 2025 |
| John Kimball Iv Whiting | General Counsel & Secretary | 12,612 | 28 Jul, 2025 |
| Stephen Lafaille | Vp Of Business Development | 12,376 | 28 Jul, 2025 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 24 Jul, 2025 | Roger P. Deschenes | Common Stock | A | 17,964 | $0.00 | 42,962 | D | A |
| 24 Jul, 2025 | John Kimball Iv Whiting | Common Stock | A | 11,976 | $0.00 | 12,612 | D | A |
| 24 Jul, 2025 | Abinand Rangesh | Common Stock | A | 53,892 | $0.00 | 64,193 | D | A |
| 24 Jul, 2025 | Stephen Lafaille | Common Stock | A | 11,976 | $0.00 | 12,376 | D | A |
| 24 Jun, 2025 | Robert A Panora | - | - | 62,523 | D | |||
| 24 Jun, 2025 | Robert A Panora | Common Stock | D | 900 | $6.86 | 62,523 | D | S |
| 23 Jun, 2025 | Robert A Panora | - | - | 63,423 | D | |||
| 23 Jun, 2025 | Robert A Panora | Common Stock | D | 31,800 | $6.36 | 63,423 | D | S |
| 18 Jun, 2025 | Robert A Panora | - | - | 95,223 | D | |||
| 18 Jun, 2025 | Robert A Panora | Common Stock | D | 13,000 | $5.03 | 95,223 | D | S |
| 16 Jun, 2025 | Robert A Panora | Common Stock | A | 52,500 | $1.10 | 165,223 | D | X |
| 16 Jun, 2025 | Robert A Panora | - | - | 25,723 | D | |||
| 16 Jun, 2025 | Robert A Panora | Common Stock | A | 52,500 | $1.10 | 108,223 | D | M |
| 16 Jun, 2025 | Robert A Panora | - | - | 108,223 | D | |||
| 16 Jun, 2025 | Robert A Panora | Common Stock | A | 12,723 | $0.79 | 82,723 | D | X |
| 16 Jun, 2025 | Robert A Panora | Common Stock | A | 12,723 | $0.79 | 25,723 | D | M |
| 16 Jun, 2025 | Robert A Panora | Common Stock | A | 30,000 | $0.71 | 112,723 | D | X |
| 16 Jun, 2025 | Robert A Panora | Common Stock | A | 30,000 | $0.71 | 55,723 | D | M |
| 16 Jun, 2025 | Robert A Panora | - | - | 112,723 | D | |||
| 16 Jun, 2025 | Robert A Panora | - | - | 82,723 | D |