secwatch.observer — SEC 8-K summary
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Issuer:     ClearSign Technologies Corp (CLIR)
CIK:        0001434524
Form:       8-K
Filed at:   2026-05-21T20:30:33+00:00
Accession:  0001104659-26-065175
Event type: other_material
Sentiment:  positive
Materiality: 0.55
Item codes: 2.02, 7.01, 9.01
LLM model:  deepseek-v4-flash:cloud@v2

ClearSign Q1 cash $7.7M; operational progress with multiple burner orders and DOE testing
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- Cash and cash equivalents $7.7M as of March 31, 2026; shares outstanding 5,409,133 after 1-for-10 reverse split.
- Received 'M1' Series burner order for midstream heater in West Texas, delivery Q3 2026.
- Received order for next phase of 32-burner retrofit project at a California refinery (physical testing).
- Successful sub-5ppm DOE/SBIR flexible fuel burner testing (ClearSign Core Gen 2, 100% hydrogen capable).
- Received fifth low-emission flare order from California energy company, total enclosed flare system, delivery Q3 2026.

Source:
  EDGAR index:    https://www.sec.gov/Archives/edgar/data/1434524/000110465926065175/0001104659-26-065175-index.htm
  Primary doc:    https://www.sec.gov/Archives/edgar/data/1434524/000110465926065175/tm2615171d1_8k.htm
  HTML page:      https://secwatch.observer/filing/0001104659-26-065175

License: Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer