TGEN · Insider Trading
Tecogen Inc.
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.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-08 | Roger P. Deschenes | Chief Financial Officer | A | +29,013 | — |
| 2026-09-08 | Stephen Lafaille | VP of Business Development | A | +29,013 | — |
| 2026-09-08 | John Kimball Whiting IV | General Counsel & Secretary | A | +19,342 | — |
| 2026-09-08 | Abinand Rangesh | Chief Executive Officer | A | +174,081 | — |
| 2026-09-08 | Robert Panora | COO and President | A | +9,671 | — |
| 2026-04-27 | Ahmed Ghoniem | Director | Buy | +12,723 | +$10.00K |
| 2026-04-14 | Susan B Hirsch | Director | Buy | +5,000 | +$18.65K |
| 2026-03-27 | Earl Lewis | Director | Buy | +5,000 | +$14.41K |
| 2026-03-27 | Earl Lewis | Director | Buy | +5,000 | +$12.60K |
| 2026-03-27 | Susan B Hirsch | Director | Buy | +10,000 | +$25.40K |
| 2026-03-23 | John Kimball Whiting IV | General Counsel & Secretary | Buy | +10,000 | +$23.80K |
| 2026-03-23 | John Hatsopoulos | Director | M | +50,000 | +$44.00K |
| 2026-03-23 | Roger P. Deschenes | CAO | Buy | +10,000 | +$22.30K |
| 2026-03-23 | Abinand Rangesh | Chief Executive Officer | Buy | +3,000 | +$6.89K |
| 2025-07-28 | Ahmed Ghoniem | Director | A | +25,000 deriv. | — |
| 2025-07-28 | Susan B Hirsch | Director | A | +25,000 deriv. | — |
| 2025-07-28 | John M Albertine | Director | A | +25,000 deriv. | — |
| 2025-07-28 | Angelina Galiteva | Director | A | +25,000 deriv. | — |
| 2025-07-28 | John Kimball Whiting IV | General Counsel & Secretary | A | +11,976 | — |
| 2025-07-28 | Abinand Rangesh | Chief Executive Officer | A | +53,892 | — |
| 2025-07-28 | Stephen Lafaille | VP of Business Development | A | +11,976 | — |
| 2025-07-28 | Roger P. Deschenes | CAO | A | +17,964 | — |
| 2025-07-28 | Earl R Lewis | Director | A | +25,000 deriv. | — |
| 2025-07-14 | Robert A Panora | COO and President | M | +70,000 | +$49.70K |
| 2025-07-14 | Robert A Panora | COO and President | MIXED | −7,477 | −$461.70K |
| 2025-06-24 | Stephen Lafaille | VP of Business Development | MIXED | +400 | −$288.55K |
| 2025-06-20 | Robert A Panora | COO and President | X | +95,223 | +$89.10K |
| 2025-06-02 | Robert A Panora | COO and President | X | +70,000 deriv. | — |
| 2025-05-07 | Earl R Lewis | Director | X | +33,750 | +$48.12K |
| 2025-05-05 | Earl R Lewis | Director | J | +240,256 | +$514.15K |
| 2025-03-25 | Earl R Lewis | Director | X | +100,000 | +$71.00K |
| 2025-03-25 | Earl R Lewis | Director | Buy | +10,000 | +$6.80K |
| 2025-03-25 | Earl R Lewis | Director | Buy | +2,000 | +$1.60K |
| 2024-12-06 | Earl R Lewis | Director | Buy | +100,000 | +$71.00K |
| 2024-12-06 | Earl R Lewis | Director | Buy | +2,000 | +$1.60K |
| 2024-09-27 | John Hatsopoulos | Director | Buy | +10,000 | +$8.38K |
| 2024-09-25 | John Hatsopoulos | Director | Buy | +10,000 | +$8.60K |
| 2024-08-20 | John Hatsopoulos | Director | Buy | +10,000 | +$8.95K |
| 2024-07-17 | Earl R Lewis | Director | Buy | +10,000 | +$6.80K |
| 2024-07-15 | Earl R Lewis | Director | Buy | +10,000 | +$6.80K |
| 2024-07-12 | John Hatsopoulos | Director | Buy | +22,466 | +$14.60K |
| 2024-06-18 | Angelina Galiteva | Director | A | +25,000 deriv. | — |
| 2024-06-18 | Ahmed Ghoniem | Director | A | +25,000 deriv. | — |
| 2024-06-18 | Susan B Hirsch | Director | A | +25,000 deriv. | — |
| 2024-06-18 | Earl R Lewis | Director | A | +25,000 deriv. | — |
| 2024-06-18 | John M Albertine | Director | A | +25,000 deriv. | — |
| 2024-05-29 | John Hatsopoulos | Director | Buy | +1,265 | +$1.01K |
| 2024-05-29 | John Hatsopoulos | Director | Buy | +10,000 | +$8.00K |
| 2024-05-28 | John Hatsopoulos | Director | Buy | +11,935 | +$9.52K |
| 2024-05-22 | John Hatsopoulos | Director | Buy | +13,800 | +$10.90K |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| Earl Lewis | Director | 1,646,006 | $3.16M |
| John Hatsopoulos | Director | 1,038,951 | $1.99M |
| Susan B Hirsch | Director | 265,416 | $509.60K |
| Abinand Rangesh | Chief Executive Officer | 241,274 | $463.25K |
| Roger P. Deschenes | Chief Financial Officer | 81,975 | $157.39K |
| Robert Panora | COO and President | 72,194 | $138.61K |
| John Kimball Whiting IV | General Counsel & Secretary | 41,954 | $80.55K |
| Stephen Lafaille | VP of Business Development | 41,389 | $79.47K |
| Ahmed Ghoniem | Director | 12,723 | $24.43K |
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.
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.