{"filing":{"accession_number":"0001537435-26-000072","cik":"0001537435","ticker":"TGEN","company_name":"TECOGEN INC.","form":"8-K","filing_date":"2026-08-31","report_date":"2026-08-31","primary_document":"tgen-20260831.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1537435/000153743526000072/tgen-20260831.htm"},"events":[{"id":30701,"run_id":28145,"accession_number":"0001537435-26-000072","anchor_item_number":"8.01","event_type":"dilutive_issuance","event_domain":"financial","is_material":true,"confidence":0.75,"summary":"Tecogen filed a Form S-3 registration statement on August 31, 2026, to facilitate the reoffer and resale of 4,507,603 shares of common stock by selling stockholders who acquired them in private placements exempt from registration. The registration enables previously unregistered shares to become liquid and available for public sale, which is materially dilutive to existing shareholders, subject to a 182-day lock-up period for the Hatsopoulos trusts holding 3,475,714 shares.","company_name":"TECOGEN INC.","ticker":"TGEN","filing_date":"2026-08-31","form":"8-K","submitted_at":null,"items":[{"id":33377,"accession_number":"0001537435-26-000072","item_number":"8.01","item_title":"Other Events.","event_type":"dilutive_issuance","event_domain":"financial","is_material":true,"confidence":0.75,"reasoning":"Tecogen filed a Form S-3 registration statement on August 31, 2026, to facilitate the reoffer and resale of 4,507,603 shares of common stock by selling stockholders who acquired them in private placements exempt from registration. While technically a resale registration rather than a new issuance, the disclosure centers on making previously unregistered shares liquid and available for public sale, which is materially dilutive to existing shareholders. The lock-up agreements with the Hatsopoulos trusts (holding 3,475,714 shares) restrict sales for 182 days post-effectiveness, but the core event is the registration enabling dilutive secondary sales.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-31T21:25:17.095034+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":33377,"accession_number":"0001537435-26-000072","item_number":"8.01","item_title":"Other Events.","event_type":"dilutive_issuance","event_domain":"financial","is_material":true,"confidence":0.75,"reasoning":"Tecogen filed a Form S-3 registration statement on August 31, 2026, to facilitate the reoffer and resale of 4,507,603 shares of common stock by selling stockholders who acquired them in private placements exempt from registration. While technically a resale registration rather than a new issuance, the disclosure centers on making previously unregistered shares liquid and available for public sale, which is materially dilutive to existing shareholders. The lock-up agreements with the Hatsopoulos trusts (holding 3,475,714 shares) restrict sales for 182 days post-effectiveness, but the core event is the registration enabling dilutive secondary sales.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-31T21:25:17.095034+00:00","company_name":"TECOGEN INC.","ticker":"TGEN","filing_date":"2026-08-31"},{"id":33378,"accession_number":"0001537435-26-000072","item_number":"9.1","item_title":"Financial Statements and Exhibits","event_type":"dilutive_issuance","event_domain":"financial","is_material":true,"confidence":0.75,"reasoning":"The filing discloses a Form S-3 resale registration statement to permit public reoffer and resale of shares of common stock by \"Selling Stockholders\" who acquired shares in transactions exempt from registration requirements. The lock-up agreement restricts these shareholders from selling during a 182-day lock-up period following the registration statement's effectiveness. This structure is characteristic of a dilutive equity issuance—specifically a resale registration by existing shareholders of previously unregistered securities, which signals prior private placement activity and potential dilution to existing shareholders.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-31T21:25:17.095034+00:00","company_name":"TECOGEN INC.","ticker":"TGEN","filing_date":"2026-08-31"}]}