IPO registrations (S-1, F-1) · Registrants
TECOGEN INC.
- SEC CIK
- 1537435 · filings on EDGAR ↗
- Former names
- TECOGEN INC (2011–2013)
- Registration
- Form S-1, first filed 2011-12-22, last 2026-08-31; 5 initial registrations, 20 amendments
- Outcome
- Final prospectus filed 2014-05-19; declared effective 2013-02-14; withdrawal requested 2013-10-04
- Industry (SIC)
- Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip 3585
- Incorporated in
- DE
- Business address
- 76 TREBLE COVE ROAD, BLDG. 1, North Billerica, MA 01862
- EIN
- 04-3536131
- Ticker
- TGEN (NYSE)
- EDGAR entity type
- operating
- Insiders and CEO pay
- TECOGEN INC. on the corporate pages
On this site
- Business registration: TECOGEN INC. EXACT (EIN (EXACT, as the state registration reports it))
- Business registration: Tecogen Inc. Fuzzy (name and state)
- Business registration: Tecogen Inc. Fuzzy (name and state)
- Business registration: TECOGEN INC. Fuzzy (name and state)
- Business registration: TECOGEN INC. Fuzzy (name and state)
- Form 5500 plan sponsor: TECOGEN, INC. EXACT (EIN (EXACT))
- Federal award recipient: TECOGEN INC. Fuzzy (name and state)
- Form D issuer: TECOGEN INC. EXACT (CIK (EXACT))
- SEC filer: TECOGEN INC. EXACT (CIK (EXACT))
- Person page: Joseph E Aoun Fuzzy (officer, director or 10% owner on the company's Forms 3, 4 and 5 (Director))
Filings 46
| Filed | Form | What it is | Name as filed | EDGAR |
|---|---|---|---|---|
| 2011-12-22 | S-1 | S-1 (registration) | TECOGEN INC | 0001144204-11-071196 ↗ |
| 2012-04-27 | S-1/A | S-1/A (amendment) | TECOGEN INC | 0001144204-12-024413 ↗ |
| 2012-07-19 | S-1/A | S-1/A (amendment) | TECOGEN INC | 0001144204-12-040196 ↗ |
| 2012-10-02 | S-1/A | S-1/A (amendment) | TECOGEN INC | 0001144204-12-054270 ↗ |
| 2012-12-21 | S-1/A | S-1/A (amendment) | TECOGEN INC | 0001537435-12-000003 ↗ |
| 2013-01-15 | S-1/A | S-1/A (amendment) | TECOGEN INC | 0001537435-13-000004 ↗ |
| 2013-02-05 | S-1/A | S-1/A (amendment) | TECOGEN INC | 0001537435-13-000010 ↗ |
| 2013-02-11 | S-1/A | S-1/A (amendment) | TECOGEN INC | 0001537435-13-000016 ↗ |
| 2013-02-14 | S-1/A | S-1/A (amendment) | TECOGEN INC | 0001537435-13-000021 ↗ |
| 2013-02-14 | EFFECT | EFFECT (declared effective) | TECOGEN INC | 9999999995-13-000501 ↗ |
| 2013-06-03 | S-1 | S-1 (registration) | TECOGEN INC. | 0001144204-13-032862 ↗ |
| 2013-09-03 | S-1/A | S-1/A (amendment) | TECOGEN INC. | 0001144204-13-048964 ↗ |
| 2013-09-30 | S-1/A | S-1/A (amendment) | TECOGEN INC. | 0001144204-13-053149 ↗ |
| 2013-10-01 | S-1/A | S-1/A (amendment) | TECOGEN INC. | 0001144204-13-053324 ↗ |
| 2013-10-01 | EFFECT | EFFECT (declared effective) | TECOGEN INC. | 9999999995-13-002844 ↗ |
| 2013-10-04 | RW | RW (withdrawal request) | TECOGEN INC. | 0001144204-13-053956 ↗ |
| 2014-02-06 | S-1 | S-1 (registration) | TECOGEN INC. | 0001144204-14-006598 ↗ |
| 2014-02-07 | S-1 | S-1 (registration) | TECOGEN INC. | 0001144204-14-006926 ↗ |
| 2014-04-17 | S-1/A | S-1/A (amendment) | TECOGEN INC. | 0001144204-14-023335 ↗ |
| 2014-04-23 | S-1/A | S-1/A (amendment) | TECOGEN INC. | 0001144204-14-024348 ↗ |
| 2014-05-12 | EFFECT | EFFECT (declared effective) | TECOGEN INC. | 9999999995-14-001426 ↗ |
| 2014-05-19 | 424B4 | 424B4 (final prospectus) | TECOGEN INC. | 0001144204-14-031875 ↗ |
| 2014-06-16 | S-1/A | S-1/A (amendment) | TECOGEN INC. | 0001537435-14-000043 ↗ |
| 2014-06-20 | S-1/A | S-1/A (amendment) | TECOGEN INC. | 0001537435-14-000049 ↗ |
| 2014-06-27 | S-1/A | S-1/A (amendment) | TECOGEN INC. | 0001537435-14-000052 ↗ |
| 2014-07-02 | EFFECT | EFFECT (declared effective) | TECOGEN INC. | 9999999995-14-002033 ↗ |
| 2014-12-05 | EFFECT | EFFECT (declared effective) | TECOGEN INC. | 9999999995-14-003595 ↗ |
| 2015-09-30 | EFFECT | EFFECT (declared effective) | TECOGEN INC. | 9999999995-15-002631 ↗ |
| 2016-07-18 | EFFECT | EFFECT (declared effective) | TECOGEN INC. | 9999999995-16-005178 ↗ |
| 2017-04-12 | EFFECT | EFFECT (declared effective) | TECOGEN INC. | 9999999995-17-000798 ↗ |
| 2020-04-03 | RW | RW (withdrawal request) | TECOGEN INC. | 0001537435-20-000016 ↗ |
| 2020-04-06 | EFFECT | EFFECT (declared effective) | TECOGEN INC. | 9999999995-20-000684 ↗ |
| 2020-04-23 | EFFECT | EFFECT (declared effective) | TECOGEN INC. | 9999999995-20-000842 ↗ |
| 2020-07-10 | EFFECT | EFFECT (declared effective) | TECOGEN INC. | 9999999995-20-001755 ↗ |
| 2020-07-10 | EFFECT | EFFECT (declared effective) | TECOGEN INC. | 9999999995-20-001758 ↗ |
| 2021-03-22 | EFFECT | EFFECT (declared effective) | TECOGEN INC. | 9999999995-21-001047 ↗ |
| 2025-07-15 | S-1 | S-1 (registration) | TECOGEN INC. | 0001537435-25-000073 ↗ |
| 2025-07-16 | S-1/A | S-1/A (amendment) | TECOGEN INC. | 0001537435-25-000081 ↗ |
| 2025-07-16 | S-1/A | S-1/A (amendment) | TECOGEN INC. | 0001537435-25-000083 ↗ |
| 2025-07-16 | S-1/A | S-1/A (amendment) | TECOGEN INC. | 0001537435-25-000086 ↗ |
| 2025-07-17 | S-1MEF | S-1MEF (added securities) | TECOGEN INC. | 0001537435-25-000088 ↗ |
| 2025-07-17 | EFFECT | EFFECT (declared effective) | TECOGEN INC. | 9999999995-25-002275 ↗ |
| 2025-07-21 | 424B4 | 424B4 (final prospectus) | TECOGEN INC. | 0001537435-25-000095 ↗ |
| 2026-08-31 | S-1/A | S-1/A (amendment) | TECOGEN INC. | 0001537435-26-000071 ↗ |
| 2026-09-01 | EFFECT | EFFECT (declared effective) | TECOGEN INC. | 9999999995-26-002842 ↗ |
| 2026-09-03 | EFFECT | EFFECT (declared effective) | TECOGEN INC. | 9999999995-26-002885 ↗ |
Officers, directors and large holders Forms 3, 4 and 5
| Insider | Role | Title | Filings | Years | On this site |
|---|---|---|---|---|---|
| AOUN JOSEPH E | Director | 2 | 2013–2014 | person page Fuzzy | |
| BROWN BONNIE JEAN | Officer | CFO, Treasurer and Secretary; Chief Accounting Officer | 4 | 2013–2018 | |
| Galiteva Angelina | Director | 9 | 2013–2026 | ||
| Ghoniem Ahmed | Director | 11 | 2013–2026 | ||
| HATSOPOULOS FAMILY 2012 TRUST | TenPercentOwner | 1 | 2013 | ||
| HATSOPOULOS GEORGE N | Director,TenPercentOwner; TenPercentOwner | 3 | 2013–2016 | ||
| Hatsopoulos John | Director; Director,Officer; Director,Officer,TenPercentOwner; Director,TenPercentOwner | Chief Executive Officer; Co-Chief Executive Officer | 76 | 2013–2026 | |
| J&P ENTERPRISES LLC | TenPercentOwner | 1 | 2013 | ||
| MAXWELL CHARLEST | Director | 6 | 2013–2017 | ||
| Panora Robert | Officer | COO and President | 15 | 2013–2026 | |
| GARRISON DAVID A | Officer | CFO, Treasurer and Secretary | 5 | 2014–2016 | |
| Benjamin Locke M. | Director,Officer; Officer | CEO; Co-CEO | 10 | 2014–2022 | |
| Lewis Earl | Director | 42 | 2014–2026 | ||
| Davidson Keith | Director | 1 | 2016 | ||
| Monovoukas Yiannis | TenPercentOwner | 1 | 2017 | ||
| Petersen Deanna M | Director | 2 | 2018–2020 | ||
| Whiting John Kimball IV | Officer | General Counsel & Secretary | 9 | 2020–2026 | |
| HOLUBOW FRED | Director | 5 | 2020–2023 | ||
| Jenkins Ralph | Director | 2 | 2022 | ||
| Rangesh Abinand | Director,Officer; Director,Officer,Other | Chief Executive Officer; Chief Financial Officer | 10 | 2022–2026 | |
| Pacheco Ann Marie Brown | TenPercentOwnerOther | 1 | 2022 | ||
| ALBERTINE JOHN M | Director | 5 | 2022–2026 | ||
| Hirsch Susan B | Director | 7 | 2023–2026 | ||
| Deschenes Roger P. | Officer | CAO; Chief Financial Officer | 5 | 2025–2026 | |
| Lafaille Stephen | Officer | VP of Business Development | 5 | 2025–2026 |
Everyone who filed an insider report for this company, from the SEC’s Insider Transactions Data Sets (2006 on). Person pages are matched by name and state only.
Private offerings before or after (Form D)
| First filed | Issuer | Industry | Offering | Sold | Investors | Filings |
|---|---|---|---|---|---|---|
| 2016-05-02 | TECOGEN INC. | Manufacturing | Indefinite | $0 | 14 | 1 |
| 2016-01-14 | TECOGEN INC. | Manufacturing | $3,000,000 | $3,000,000 | 0 | 1 |
| 2015-08-12 | TECOGEN INC. | Manufacturing | $5,000,000 | $5,000,000 | 0 | 1 |
| 2015-02-18 | TECOGEN INC. | Manufacturing | $1,000,000 | $1,000,000 | 1 | 1 |
Data: SEC EDGAR. The quarterly full index (every S-1, S-1/A, F-1 and F-1/A since 1993, with the pricing prospectus, notice of effectiveness and withdrawal request of each registrant) and the company submissions data (SIC, state of incorporation, address, EIN, tickers, former names). Company details are what EDGAR holds today, not at the time of the filing.