{"schema_version":"secwatch.filing_event.v1","accession":"0001104659-24-073167","form_type":"8-K","ticker":"CLIR","cik":"0001434524","company_name":"ClearSign Technologies Corp","filed_at":"2024-06-20T23:59:59+00:00","discovered_at":"2026-05-14T18:03:18.402887+00:00","generated_at":"2026-06-01T03:20:45.184359+00:00","sec_items":["5.02","8.01","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.7,"calibrated_materiality_score":0.7,"confidence":"high","headline":"ClearSign board member resigns; clirSPV exercises full participation right for ~$4.3M","bullets":["Board member Robert T. Hoffman Sr. resigned effective June 16, 2024; successor designee being vetted.","clirSPV LLC exercised Participation Right in full, purchasing shares and warrants for ~$4.3M gross proceeds.","Exercise includes 3.9M common shares, pre-funded warrants for 786K shares, redeemable warrants for 7.0M shares.","Expected close on or about June 24, 2024; proceeds for working capital, R&D, sales.","Hoffman said clirSPV's total capital infusion now $19.1M; believes sales funnel will convert to orders."],"urls":{"canonical":"https://secwatch.observer/filing/0001104659-24-073167","json":"https://secwatch.observer/filing/0001104659-24-073167.json","markdown":"https://secwatch.observer/filing/0001104659-24-073167.md","text":"https://secwatch.observer/filing/0001104659-24-073167.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1434524/000110465924073167/0001104659-24-073167-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1434524/000110465924073167/tm2417562d1_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-01T03:20:45.184359+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":[{"claim_id":"3d76d2cd27","claim":"Robert T. Hoffman, Sr. resigned as Director at ClearSign Technologies Corp.","evidence_excerpt":"On June 16, 2024, Robert T. Hoffman, Sr., notified the board of directors (the “Board”) of ClearSign Technologies Corporation (the “Company”) that he resigned from the Board, effective immediately.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465924073167/0001104659-24-073167-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"resigned"},{"label":"Role","value":"Director"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}