TGEN (Tecogen Inc.)
Insider Trading Activity
Every open-market purchase and sale reported by TGEN officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-08 | Roger P. Deschenes | Chief Financial Officer | A | — | — |
| 2026-09-08 | Stephen Lafaille | VP of Business Development | A | — | — |
| 2026-09-08 | John Kimball Whiting IV | General Counsel & Secretary | A | — | — |
| 2026-09-08 | Abinand Rangesh | Chief Executive Officer | A | — | — |
| 2026-09-08 | Robert Panora | COO and President | A | — | — |
| 2026-04-27 | Ahmed Ghoniem | Director | Buy | — | — |
| 2026-04-14 | Susan B Hirsch | Director | Buy | — | — |
| 2026-03-27 | Earl Lewis | Director | Buy | — | — |
| 2026-03-27 | Earl Lewis | Director | Buy | — | — |
| 2026-03-27 | Susan B Hirsch | Director | Buy | — | — |
| 2026-03-23 | John Kimball Whiting IV | General Counsel & Secretary | Buy | — | — |
| 2026-03-23 | John Hatsopoulos | Director | M | — | — |
| 2026-03-23 | Roger P. Deschenes | CAO | Buy | — | — |
| 2026-03-23 | Abinand Rangesh | Chief Executive Officer | Buy | — | — |
| 2025-07-28 | AHMED GHONIEM | Director | A | — | — |
| 2025-07-28 | Susan B Hirsch | Director | A | — | — |
| 2025-07-28 | JOHN M ALBERTINE | Director | A | — | — |
| 2025-07-28 | ANGELINA GALITEVA | Director | A | — | — |
| 2025-07-28 | John Kimball Whiting IV | General Counsel & Secretary | A | — | — |
| 2025-07-28 | Abinand Rangesh | Chief Executive Officer | A | — | — |
| 2025-07-28 | Stephen Lafaille | VP of Business Development | A | — | — |
| 2025-07-28 | Roger P. Deschenes | CAO | A | — | — |
| 2025-07-28 | EARL R LEWIS | Director | A | — | — |
| 2025-07-14 | ROBERT A PANORA | COO and President | M | — | — |
| 2025-07-14 | ROBERT A PANORA | COO and President | MIXED | — | — |
| 2025-06-24 | Stephen Lafaille | VP of Business Development | MIXED | — | — |
| 2025-06-20 | ROBERT A PANORA | COO and President | X | — | — |
| 2025-06-02 | ROBERT A PANORA | COO and President | X | — | — |
| 2025-05-07 | EARL R LEWIS | Director | X | — | — |
| 2025-05-05 | EARL R LEWIS | Director | J | — | — |
| 2025-03-25 | EARL R LEWIS | Director | X | — | — |
| 2025-03-25 | EARL R LEWIS | Director | Buy | — | — |
| 2025-03-25 | EARL R LEWIS | Director | Buy | — | — |
| 2024-12-06 | EARL R LEWIS | Director | Buy | — | — |
| 2024-12-06 | EARL R LEWIS | Director | Buy | — | — |
| 2024-09-27 | JOHN HATSOPOULOS | Director | Buy | — | — |
| 2024-09-25 | JOHN HATSOPOULOS | Director | Buy | — | — |
| 2024-08-20 | JOHN HATSOPOULOS | Director | Buy | — | — |
| 2024-07-17 | EARL R LEWIS | Director | Buy | — | — |
| 2024-07-15 | EARL R LEWIS | Director | Buy | — | — |
| 2024-07-12 | JOHN HATSOPOULOS | Director | Buy | — | — |
| 2024-06-18 | ANGELINA GALITEVA | Director | A | — | — |
| 2024-06-18 | AHMED GHONIEM | Director | A | — | — |
| 2024-06-18 | Susan B Hirsch | Director | A | — | — |
| 2024-06-18 | EARL R LEWIS | Director | A | — | — |
| 2024-06-18 | JOHN M ALBERTINE | Director | A | — | — |
| 2024-05-29 | JOHN HATSOPOULOS | Director | Buy | — | — |
| 2024-05-29 | JOHN HATSOPOULOS | Director | Buy | — | — |
| 2024-05-28 | JOHN HATSOPOULOS | Director | Buy | — | — |
| 2024-05-22 | JOHN HATSOPOULOS | Director | Buy | — | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| — | Director | 1,646,006 | — |
| — | 10%+ Owner | 1,355,541 | — |
| — | Director | 1,038,951 | — |
| — | Director | 265,416 | — |
| — | Chief Executive Officer | 241,274 | — |
| — | Director | 224,590 | — |
| — | Chief Financial Officer | 81,975 | — |
| — | COO and President | 72,194 | — |
| — | General Counsel & Secretary | 41,954 | — |
| — | VP of Business Development | 41,389 | — |
| — | Director | 12,723 | — |
| — | CFO, Treasurer and Secretary | 10,000 | — |
| — | CEO | 8,836 | — |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the TGEN quote page; the site-wide leaderboard is on the insider transactions hub.