Company filings profile · CIK 0001537435
TECOGEN INC. — SEC filings & insider activity.
Real, source-linked SEC EDGAR activity for TECOGEN INC. (TGEN): 15 filings in the last 90 days vs 17 in the prior 90 (filing-velocity steady · 0.88×). Latest material 8-K events, insider Form-4 transactions, and periodic reports — monitored for change.
✔ Verified against the public SEC EDGAR filing record as of Oct 15, 2026. Source-linked, daily-refreshed.
Material 8-K events — TECOGEN INC.
8-K disclosures decoded by item code (the material events: agreements, results, control/management changes, impairments, restatements).
| Filed | Event | |
|---|---|---|
| Oct 14, 2026 | Other Events; Financial Statements and Exhibits | ↗ |
| Aug 31, 2026 | Other Events; Financial Statements and Exhibits | ↗ |
| Aug 12, 2026 | Results of Operations (earnings); Regulation FD Disclosure; Financial Statements and Exhibits | ↗ |
| Jul 1, 2026 | Departure/Election of Directors or Officers | ↗ |
| Jun 5, 2026 | Item 5.07 | ↗ |
| May 12, 2026 | Results of Operations (earnings); Regulation FD Disclosure; Financial Statements and Exhibits | ↗ |
| Apr 8, 2026 | Other Events; Financial Statements and Exhibits | ↗ |
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Insider transactions (Form 4 / 3 / 5)
Recent filings
| Filed | Form | Detail | |
|---|---|---|---|
| Oct 14, 2026 | 8-K | Other Events; Financial Statements and Exhibits | ↗ |
| Sep 8, 2026 | 4/A | FORM 4/A | ↗ |
| Sep 8, 2026 | 4/A | FORM 4/A | ↗ |
| Sep 8, 2026 | 4/A | FORM 4/A | ↗ |
| Sep 8, 2026 | 4/A | FORM 4/A | ↗ |
| Sep 8, 2026 | 4/A | FORM 4/A | ↗ |
| Sep 4, 2026 | 424B3 | 424B3 | ↗ |
| Sep 3, 2026 | EFFECT | Item ; Item ; Item | ↗ |
| Sep 1, 2026 | EFFECT | Item ; Item ; Item | ↗ |
| Sep 1, 2026 | POS AM | POS AM | ↗ |
| Aug 31, 2026 | S-3 | S-3 | ↗ |
| Aug 31, 2026 | 8-K | Other Events; Financial Statements and Exhibits | ↗ |
| Aug 31, 2026 | S-1/A | S-1/A | ↗ |
| Aug 13, 2026 | 10-Q | 10-Q | ↗ |
| Aug 12, 2026 | 8-K | Results of Operations (earnings); Regulation FD Disclosure; Financial Statements and Exhibits | ↗ |
| Jul 1, 2026 | 8-K | Departure/Election of Directors or Officers | ↗ |
| Jun 30, 2026 | 4 | FORM 4 | ↗ |
| Jun 30, 2026 | 4 | FORM 4 | ↗ |
| Jun 30, 2026 | 4 | FORM 4 | ↗ |
| Jun 30, 2026 | 4 | FORM 4 | ↗ |
| Jun 30, 2026 | 4 | FORM 4 | ↗ |
| Jun 30, 2026 | 4 | FORM 4 | ↗ |
| Jun 30, 2026 | 4 | FORM 4 | ↗ |
| Jun 30, 2026 | 4 | FORM 4 | ↗ |
| Jun 30, 2026 | 4 | FORM 4 | ↗ |
| Jun 30, 2026 | 4 | FORM 4 | ↗ |
| Jun 10, 2026 | SCHEDULE 13G | ↗ | |
| Jun 5, 2026 | 8-K | Item 5.07 | ↗ |
| May 13, 2026 | 10-Q | 10-Q | ↗ |
| May 12, 2026 | 8-K | Results of Operations (earnings); Regulation FD Disclosure; Financial Statements and Exhibits | ↗ |
| Apr 27, 2026 | 4 | FORM 4 | ↗ |
| Apr 21, 2026 | DEF 14A | DEF 14A | ↗ |
| Apr 14, 2026 | 4 | FORM 4 | ↗ |
| Apr 8, 2026 | 8-K | Other Events; Financial Statements and Exhibits | ↗ |
| Mar 27, 2026 | 4 | FORM 4 | ↗ |
| Mar 27, 2026 | 4 | FORM 4 | ↗ |
| Mar 27, 2026 | 4 | FORM 4 | ↗ |
| Mar 23, 2026 | 4 | FORM 4 | ↗ |
| Mar 23, 2026 | 4 | FORM 4 | ↗ |
| Mar 23, 2026 | 4 | FORM 4 | ↗ |