Company · CIK 1537435 # TECOGEN INC. | CIK | [1537435](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001537435) (SEC EDGAR) | | --- | --- | | Industry (SIC) | 3585 — Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip | | Incorporated in | DE | | Business address | MA | | Listed | TGEN (NYSE) | | First annual or quarterly report | 2013-03-27 | ## Offerings 10 registrations | Registration | Label and status | First filed | Last event | Filings | | --- | --- | --- | --- | --- | | 333-298673 | Shelf Effective | 2026-08-31 | 2026-09-03 | 2 | | 333-212433 | Shelf Effective | 2016-07-07 | 2026-09-01 | 5 | | 333-288668 | Registered company Effective | 2025-07-15 | 2025-07-17 | 5 | | 333-205147 | Shelf Effective | 2015-06-22 | 2020-07-10 | 3 | | 333-237582 | Shelf Effective | 2020-04-06 | 2020-07-10 | 3 | | 333-199634 | Shelf Withdrawn | 2014-10-28 | 2020-04-06 | 4 | | 333-193791 | Registered company Effective | 2014-02-06 | 2014-07-02 | 5 | | 333-193823 | Registered company Final prospectus | 2014-02-07 | 2014-05-19 | 5 | | 333-189042 | Registered company Withdrawn | 2013-06-03 | 2013-10-04 | 6 | | 333-178697 | First-time registration Effective | 2011-12-22 | 2013-02-14 | 10 | ## Filings 51 | Filed | Filing | Registration | Accession | | --- | --- | --- | --- | | 2026-09-03 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1537435/999999999526002885/9999999995-26-002885-index.htm) Declared effective | 333-298673 | 9999999995-26-002885 | | 2026-09-01 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1537435/999999999526002842/9999999995-26-002842-index.htm) Declared effective | 333-212433 | 9999999995-26-002842 | | 2026-08-31 | [S-3](https://www.sec.gov/Archives/edgar/data/1537435/000153743526000073/0001537435-26-000073-index.htm) Shelf registered | 333-298673 | 0001537435-26-000073 | | 2026-08-31 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1537435/000153743526000071/0001537435-26-000071-index.htm) Amendment | 333-212433 | 0001537435-26-000071 | | 2025-07-21 | [424B4](https://www.sec.gov/Archives/edgar/data/1537435/000153743525000095/0001537435-25-000095-index.htm) Final prospectus | 333-288740 | 0001537435-25-000095 | | 2025-07-17 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1537435/999999999525002275/9999999995-25-002275-index.htm) Declared effective | 333-288668 | 9999999995-25-002275 | | 2025-07-16 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1537435/000153743525000086/0001537435-25-000086-index.htm) Amendment | 333-288668 | 0001537435-25-000086 | | 2025-07-16 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1537435/000153743525000083/0001537435-25-000083-index.htm) Amendment | 333-288668 | 0001537435-25-000083 | | 2025-07-16 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1537435/000153743525000081/0001537435-25-000081-index.htm) Amendment | 333-288668 | 0001537435-25-000081 | | 2025-07-15 | [S-1](https://www.sec.gov/Archives/edgar/data/1537435/000153743525000073/0001537435-25-000073-index.htm) Registration filed | 333-288668 | 0001537435-25-000073 | | 2025-06-26 | [DRS](https://www.sec.gov/Archives/edgar/data/1537435/000153743525000067/0001537435-25-000067-index.htm) Draft made public | 377-08143 | 0001537435-25-000067 | | 2021-03-22 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1537435/999999999521001047/9999999995-21-001047-index.htm) Declared effective | 333-212433 | 9999999995-21-001047 | | 2020-07-10 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1537435/999999999520001758/9999999995-20-001758-index.htm) Declared effective | 333-237582 | 9999999995-20-001758 | | 2020-07-10 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1537435/999999999520001755/9999999995-20-001755-index.htm) Declared effective | 333-205147 | 9999999995-20-001755 | | 2020-04-23 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1537435/999999999520000842/9999999995-20-000842-index.htm) Declared effective | 333-237582 | 9999999995-20-000842 | | 2020-04-06 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1537435/999999999520000684/9999999995-20-000684-index.htm) Declared effective | 333-199634 | 9999999995-20-000684 | | 2020-04-06 | [S-3](https://www.sec.gov/Archives/edgar/data/1537435/000153743520000020/0001537435-20-000020-index.htm) Shelf registered | 333-237582 | 0001537435-20-000020 | | 2020-04-03 | [RW](https://www.sec.gov/Archives/edgar/data/1537435/000153743520000016/0001537435-20-000016-index.htm) Withdrawn | 333-199634 | 0001537435-20-000016 | | 2017-04-12 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1537435/999999999517000798/9999999995-17-000798-index.htm) Declared effective | 333-215231 | 9999999995-17-000798 | | 2016-07-18 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1537435/999999999516005178/9999999995-16-005178-index.htm) Declared effective | 333-212433 | 9999999995-16-005178 | | 2016-07-07 | [S-3](https://www.sec.gov/Archives/edgar/data/1537435/000153743516000139/0001537435-16-000139-index.htm) Shelf registered | 333-212433 | 0001537435-16-000139 | | 2015-09-30 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1537435/999999999515002631/9999999995-15-002631-index.htm) Declared effective | 333-205147 | 9999999995-15-002631 | | 2015-06-22 | [S-3](https://www.sec.gov/Archives/edgar/data/1537435/000153743515000033/0001537435-15-000033-index.htm) Shelf registered | 333-205147 | 0001537435-15-000033 | | 2014-12-05 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1537435/999999999514003595/9999999995-14-003595-index.htm) Declared effective | 333-199634 | 9999999995-14-003595 | | 2014-10-28 | [S-3](https://www.sec.gov/Archives/edgar/data/1537435/000153743514000083/0001537435-14-000083-index.htm) Shelf registered | 333-199634 | 0001537435-14-000083 | | 2014-07-02 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1537435/999999999514002033/9999999995-14-002033-index.htm) Declared effective | 333-193791 | 9999999995-14-002033 | | 2014-06-27 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1537435/000153743514000052/0001537435-14-000052-index.htm) Amendment | 333-193791 | 0001537435-14-000052 | | 2014-06-20 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1537435/000153743514000049/0001537435-14-000049-index.htm) Amendment | 333-193791 | 0001537435-14-000049 | | 2014-06-16 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1537435/000153743514000043/0001537435-14-000043-index.htm) Amendment | 333-193791 | 0001537435-14-000043 | | 2014-05-19 | [424B4](https://www.sec.gov/Archives/edgar/data/1537435/000114420414031875/0001144204-14-031875-index.htm) Final prospectus | 333-193823 | 0001144204-14-031875 | | 2014-05-12 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1537435/999999999514001426/9999999995-14-001426-index.htm) Declared effective | 333-193823 | 9999999995-14-001426 | | 2014-04-23 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1537435/000114420414024348/0001144204-14-024348-index.htm) Amendment | 333-193823 | 0001144204-14-024348 | | 2014-04-17 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1537435/000114420414023335/0001144204-14-023335-index.htm) Amendment | 333-193823 | 0001144204-14-023335 | | 2014-02-07 | [S-1](https://www.sec.gov/Archives/edgar/data/1537435/000114420414006926/0001144204-14-006926-index.htm) Registration filed | 333-193823 | 0001144204-14-006926 | | 2014-02-06 | [S-1](https://www.sec.gov/Archives/edgar/data/1537435/000114420414006598/0001144204-14-006598-index.htm) Registration filed | 333-193791 | 0001144204-14-006598 | | 2013-10-04 | [RW](https://www.sec.gov/Archives/edgar/data/1537435/000114420413053956/0001144204-13-053956-index.htm) Withdrawn | 333-189042 | 0001144204-13-053956 | | 2013-10-01 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1537435/999999999513002844/9999999995-13-002844-index.htm) Declared effective | 333-189042 | 9999999995-13-002844 | | 2013-10-01 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1537435/000114420413053324/0001144204-13-053324-index.htm) Amendment | 333-189042 | 0001144204-13-053324 | | 2013-09-30 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1537435/000114420413053149/0001144204-13-053149-index.htm) Amendment | 333-189042 | 0001144204-13-053149 | | 2013-09-03 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1537435/000114420413048964/0001144204-13-048964-index.htm) Amendment | 333-189042 | 0001144204-13-048964 | | 2013-06-03 | [S-1](https://www.sec.gov/Archives/edgar/data/1537435/000114420413032862/0001144204-13-032862-index.htm) Registration filed | 333-189042 | 0001144204-13-032862 | | 2013-02-14 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1537435/999999999513000501/9999999995-13-000501-index.htm) Declared effective | 333-178697 | 9999999995-13-000501 | | 2013-02-14 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1537435/000153743513000021/0001537435-13-000021-index.htm) Amendment | 333-178697 | 0001537435-13-000021 | | 2013-02-11 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1537435/000153743513000016/0001537435-13-000016-index.htm) Amendment | 333-178697 | 0001537435-13-000016 | | 2013-02-05 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1537435/000153743513000010/0001537435-13-000010-index.htm) Amendment | 333-178697 | 0001537435-13-000010 | | 2013-01-15 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1537435/000153743513000004/0001537435-13-000004-index.htm) Amendment | 333-178697 | 0001537435-13-000004 | | 2012-12-21 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1537435/000153743512000003/0001537435-12-000003-index.htm) Amendment | 333-178697 | 0001537435-12-000003 | | 2012-10-02 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1537435/000114420412054270/0001144204-12-054270-index.htm) Amendment | 333-178697 | 0001144204-12-054270 | | 2012-07-19 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1537435/000114420412040196/0001144204-12-040196-index.htm) Amendment | 333-178697 | 0001144204-12-040196 | | 2012-04-27 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1537435/000114420412024413/0001144204-12-024413-index.htm) Amendment | 333-178697 | 0001144204-12-024413 | | 2011-12-22 | [S-1](https://www.sec.gov/Archives/edgar/data/1537435/000114420411071196/0001144204-11-071196-index.htm) Registration filed | 333-178697 | 0001144204-11-071196 | [All filings of this company](https://equitycapital.markets/filings?cik=1537435) · [CSV](https://equitycapital.markets/filings.csv?cik=1537435) --- Source page: https://equitycapital.markets/company/1537435 · Data: U.S. SEC EDGAR · CC BY 4.0