Form4.ai tracks every SEC insider trade in real time. See every TGEN insider filing with a free account — no card.
See every TGEN insider filing — free account, no card.
Free accountTECOGEN INC. (TGEN) has 5 SEC Form 4 insider filings on record in the last 90 days. Most recent filing: Sept. 8, 2026.
Open-market value, last 90 days
No open-market buys or sales in this period.
Form 4 filings by type, last 90 days
| Date | Insider | Trade | Value | Price since buy |
|---|---|---|---|---|
| Sep 8, 2026 SEC filing Amended: Corrected by the insider on Sep 8, 2026 | Whiting John Kimball IV General Counsel & Secretary | Grant / award | — | — |
| Sep 8, 2026 SEC filing Amended: Corrected by the insider on Sep 8, 2026 | Lafaille Stephen VP of Business Development | Grant / award | — | — |
| Sep 8, 2026 SEC filing | Panora Robert COO and President | Grant / award | — | — |
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Form 4 is the filing company officers, directors and 10% shareholders must submit to the SEC within two business days of trading their own company's stock. Open-market purchases generally carry more signal than sales, which are often scheduled in advance. More on how this works.