---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-23-118741"
form_type: "8-K"
ticker: "CLIR"
cik: "0001434524"
company_name: "ClearSign Technologies Corp"
filed_at: "2023-11-15T23:59:59+00:00"
generated_at: "2026-06-08T02:15:18.329357+00:00"
event_type: "other_material"
sentiment: "positive"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# ClearSign Q3 revenue $85k; first commercial boiler burner startup; hydrogen grants

## Summary
- Revenue approx $85k in Q3 2023 vs zero year-ago; cash & short-term investments $7.2M as of Sep 30.
- First commercial boiler burner installation started up; launched Rogue NZN/S5/S9 boiler burner line.
- Hired Matthew Martin as CTO; focus on expanding ClearSign Core technology into new markets.
- Completed Phase 1 testing of 100% hydrogen burner; awarded Phase 2 SBIR grant of $1.65M from DOE.
- SoCalGas collaboration with additional $500k funding for hydrogen burner project; advancing commercialization.

## SEC filing metadata
- accession: 0001104659-23-118741
- form_type: 8-K
- ticker: CLIR
- cik: 0001434524
- company_name: ClearSign Technologies Corp
- filed_at: 2023-11-15T23:59:59+00:00
- event_type: other_material
- sentiment: positive
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 2.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1434524/000110465923118741/0001104659-23-118741-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1434524/000110465923118741/tm2330860d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-23-118741
- JSON: https://secwatch.observer/filing/0001104659-23-118741.json
- Plain text: https://secwatch.observer/filing/0001104659-23-118741.txt

## Key facts
- Earnings Releases
  ClearSign Technologies Corp reported the third quarter ended September 30, 2023 results: revenue approximately $85 thousand.
  - Period: the third quarter ended September 30, 2023
  - Revenue: approximately $85 thousand
  - Result: reported results
  source text: The Company recognized approximately $85 thousand in revenue during the three months ended September 30, 2023, as compared to zero revenue for the same period of 2022.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1434524/000110465923118741/0001104659-23-118741-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.