{"schema_version":"secwatch.filing_event.v1","accession":"0001537435-26-000027","form_type":"8-K","ticker":"TGEN","cik":"0001537435","company_name":"TECOGEN INC.","filed_at":"2026-04-08T23:59:59+00:00","discovered_at":"2026-05-14T18:02:32.441921+00:00","generated_at":"2026-05-15T06:53:21.173350+00:00","sec_items":["8.01","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.2,"calibrated_materiality_score":0.2,"confidence":"high","headline":"Tecogen extends Advisory Agreement with John N. Hatsopoulos through March 2028","bullets":["Advisory Agreement term extended to March 31, 2028.","Original agreement dated January 18, 2018, amended in 2019 and 2023.","Unanimous Board approval on April 7, 2026.","No changes to other terms of the agreement disclosed."],"urls":{"canonical":"https://secwatch.observer/filing/0001537435-26-000027","json":"https://secwatch.observer/filing/0001537435-26-000027.json","markdown":"https://secwatch.observer/filing/0001537435-26-000027.md","text":"https://secwatch.observer/filing/0001537435-26-000027.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1537435/000153743526000027/0001537435-26-000027-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1537435/000153743526000027/tgen-20260408.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-15T06:53:21.173350+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}