🕵️ Tecogen Inc. ($TGEN)
SEC insider & ownership activity, last 12 months · CIK 1537435 · every row links its SEC filing
Over the last 12 months insiders bought $134K with no open-market selling against it. Susan B. Hirsch bought $44K in discretionary trades (Mar–Apr). No red-flag 8-Ks in the window.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
6 buyers, $134K (8 lots) · 0 sellers, $0 (0 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Susan B. Hirsch | 2 | $44K | 0 | – | Apr 13, 2026 |
| Lewis Earl | 2 | $27K | 0 | – | Mar 27, 2026 |
| Whiting John Kimball IV | 1 | $24K | 0 | – | Mar 23, 2026 |
| Roger P. Deschenes | 1 | $22K | 0 | – | Mar 20, 2026 |
| Ghoniem Ahmed | 1 | $10K | 0 | – | Apr 24, 2026 |
| Rangesh Abinand | 1 | $7K | 0 | – | Mar 20, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Portolan Capital Management, LLC | 5.2% | 13G | Jun 10, 2026 | filing ↗ | |
| George McCabe | 5.2% | 13G | Jun 10, 2026 | filing ↗ |
Planned insider sales (Form 144)
No sale notices filed in the last 12 months.
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Officer/director changes (5.02) | Jun 26, 2026 | filing ↗ |
| Shareholder vote (5.07) | Jun 5, 2026 | filing ↗ |
| Earnings (2.02) | May 12, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | May 12, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 12, 2026 | filing ↗ |
| Other events (8.01) | Apr 8, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 8, 2026 | filing ↗ |
| Earnings (2.02) | Mar 17, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Mar 17, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 17, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jan 6, 2026 | filing ↗ |
| Earnings (2.02) | Nov 12, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Nov 12, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 12, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Sep 17, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Sep 17, 2025 | filing ↗ |
| Other events (8.01) | Sep 2, 2025 | filing ↗ |
| Earnings (2.02) | Aug 12, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Aug 12, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 12, 2025 | filing ↗ |