Tecogen Inc.
Last updated September 27, 2026
Organization details
- Legal name
- Tecogen Inc.
- Ownership
- Public
- Status
- Active
- Headquarters country
- United States
- Ticker symbol
- TGEN
- Primary stock exchange
- NYSE American
Identifiers
- SEC CIK
- 0001537435
Board of directors
-
Abinand Rangesh · Director · Chief Executive OfficerSince 2023
-
Ahmed Ghoniem · DirectorSince 2023
-
Angelina Galiteva · DirectorSince 2023
-
Earl R. Lewis · DirectorSince 2023
-
Fred Holubow · DirectorSince 2023
-
John Hatsopoulos · DirectorSince 2023
-
John M. Albertine · DirectorSince 2023
-
Susan B. Hirsch · DirectorSince 2023
Chief executives
Abinand Rangesh
· Chief Executive Officer
Dates unknown
Board connections
2 of this board's directors also sit on 2 other boards.
- via Susan B. Hirsch
- via John M. Albertine
Insider trades
All notable trades →From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.
- Bought, last 12 months
- $134,101
- 8 purchases by 6 insiders
- Sold, last 12 months
- $0
- 0 sales by 0 insiders
| Date | Insider | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| Jun 26, 2026 | Whiting John Kimball IV Officer (General Counsel & Secretary) | Grant or award | +19,342 | — | — |
| Jun 26, 2026 | Lafaille Stephen Officer (VP of Business Development) | Grant or award | +29,013 | — | — |
| Jun 26, 2026 | Deschenes Roger P. Officer (CAO) | Grant or award | +29,013 | — | — |
| Jun 26, 2026 | Panora Robert Officer (COO and President) | Grant or award | +9,671 | — | — |
| Jun 26, 2026 | Abinand Rangesh Director, Officer (Chief Executive Officer), Chief Financial Officer | Grant or award | +174,081 | — | — |
| Apr 24, 2026 | Ahmed Ghoniem Director | Open-market purchase | +12,723 | $0.79 | $10,051 |
| Apr 13, 2026 | Susan B. Hirsch Director | Open-market purchase | +5,000 | $3.73 | $18,650 |
| Mar 27, 2026 | Susan B. Hirsch Director | Open-market purchase | +10,000 | $2.54 | $25,400 |
| Mar 27, 2026 | Earl R. Lewis Director | Open-market purchase | +5,000 | $2.52 | $12,600 |
| Mar 26, 2026 | Earl R. Lewis Director | Open-market purchase | +5,000 | $2.88 | $14,400 |
| Mar 23, 2026 | Whiting John Kimball IV Officer (General Counsel & Secretary) | Open-market purchase | +10,000 | $2.38 | $23,800 |
| Mar 20, 2026 | Deschenes Roger P. Officer (CAO) | Open-market purchase | +10,000 | $2.23 | $22,300 |
| Mar 20, 2026 | Abinand Rangesh Director, Officer (Chief Executive Officer), Chief Financial Officer | Open-market purchase | +3,000 | $2.30 | $6,900 |
| Mar 20, 2026 | John Hatsopoulos Director | Option exercise | +50,000 | $0.88 | $44,000 |
| Jul 24, 2025 | Lafaille Stephen Officer (VP of Business Development) | Grant or award | +11,976 | — | — |
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