---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-23-097793"
form_type: "8-K"
ticker: "CLIR"
cik: "0001434524"
company_name: "ClearSign Technologies Corp"
filed_at: "2023-09-01T23:59:59+00:00"
generated_at: "2026-06-11T00:27:04.498149+00:00"
event_type: "earnings"
sentiment: "positive"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "medium"
source: SEC EDGAR
---

# ClearSign Q2 revenue $150k vs $0 YoY; awarded $1.65M DOE hydrogen burner grant

## Summary
- Q2 2023 revenue ~$150k, up from zero in Q2 2022; cash and short-term investments ~$8.5M.
- Awarded $1.65M Phase 2 SBIR grant with DOE to commercialize 100% hydrogen ultra-low NOx burner.
- Engineering order for 13 burners across two heaters from California refinery to meet emission limits.
- First boiler burner sale into Texas Gulf Coast market; installation scheduled Q3 2023.

## SEC filing metadata
- accession: 0001104659-23-097793
- form_type: 8-K
- ticker: CLIR
- cik: 0001434524
- company_name: ClearSign Technologies Corp
- filed_at: 2023-09-01T23:59:59+00:00
- event_type: earnings
- sentiment: positive
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: medium
- sec_items: 2.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1434524/000110465923097793/0001104659-23-097793-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1434524/000110465923097793/tm2325390d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-23-097793
- JSON: https://secwatch.observer/filing/0001104659-23-097793.json
- Plain text: https://secwatch.observer/filing/0001104659-23-097793.txt

## Key facts
- Earnings Releases
  ClearSign Technologies Corp reported the second quarter ended June 30, 2023 results: revenue approximately $150 thousand.
  - Period: the second quarter ended June 30, 2023
  - Revenue: approximately $150 thousand
  - Result: reported results
  source text: The Company recognized approximately $150 thousand in revenue during the three months ended June 30, 2023, as compared to zero revenue for the same period of 2022.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1434524/000110465923097793/0001104659-23-097793-index.htm

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